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Co-optimization of linear gain and dynamic range for atomic superheterodyne receivers based on homodyne readout 认领 引用
1
作者 Chuan Qu Dongqin Guo Jian Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第1期416-423,共8页
Rydberg-atom-based superheterodyne receivers integrate self-calibration,high sensitivity,a wide operational frequency range,and phase/frequency resolved detection capabilities,demonstrating broad application prospects... Rydberg-atom-based superheterodyne receivers integrate self-calibration,high sensitivity,a wide operational frequency range,and phase/frequency resolved detection capabilities,demonstrating broad application prospects as nextgeneration microwave receivers.Linear gain and linear dynamic range(LDR)are critical metrics for assessing receiver sensitivity and demodulation fidelity,respectively.We numerically solve the four-level master equation and then employ particle swarm optimization(PSO)algorithm to co-optimize linear gain and LDR in atomic superheterodyne receivers based on balanced homodyne detection.Further,we systematically account for dominant dephasing mechanisms in the simulation,encompassing spontaneous decay,transit dephasing,collision dephasing,laser linewidth dephasing,and Doppler averaging.Homodyne readout utilizes both the real and imaginary parts of polarizability for sensing.In the case of the photon shot noise limit,its signal-to-noise ratio(SNR)expression resembles that of direct optical-intensity readout.However,the inherent coherent subtraction operation in homodyne detection significantly suppresses common-mode noise,while appropriately increasing the reference beam power enhances the gain in practical experiments.Indeed,this co-optimization problem,characterized by a high-dimensional variable space,two objectives,and non-convexity,is well-suited for solution by PSO.In addition,probe and coupling detuning contribute equivalently to polarizability and compensate for each other owing to Doppler averaging,thereby reducing the optimization variable space by one.By adopting a product form of linear gain and LDR as the fitness function,the PSO achieves rapid convergence.Here,the effectiveness of the PSO results is verified via the total harmonic distortion(THD).The relative error-based LDR calculation method we proposed efficiently measures receiver response linearity with consuming fewer computational resources.This research is expected to offer valuable insights into enhancing the performance of Rydberg-atom-based superheterodyne receivers. 展开更多
关键词 atomic superheterodyne receivers linear gain linear dynamic range balanced homodyne readout
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A compact and low-power sub-THz direct-conversion receiver with 2nd-harmonic-remixed LO chain(×9)in 28 nm CMOS technology 认领 引用
2
作者 Yuhan Ding Tiehuai Zhang +8 位作者 Kailei Wang Yuanxun Zhou Yuyang Nan Yinan Zhou Qian Xie Yiming Yu Jingzhi Zhang Kai Kang Zheng Wang 《Journal of Semiconductors》 EI CAS CSCD 2026年第6期72-80,共9页
In this paper,a compact and low-power sub-THz direct-conversion receiver with a second-harmonic-remixed LO chain is proposed.Based on a common-mode second-harmonic-enhanced network,the common-mode second-harmonic volt... In this paper,a compact and low-power sub-THz direct-conversion receiver with a second-harmonic-remixed LO chain is proposed.Based on a common-mode second-harmonic-enhanced network,the common-mode second-harmonic voltage at the drains of the common-source differential pair in the tripler is enhanced and mixed with the fundamental voltage at the gate to generate additional differential third-harmonic voltage.Hence,the saturation output power and efficiency of the triplers used in the LO chain have been significantly improved.The power consumption of the LO chain employed in the receiver is as low as 65 mW.Measurement results demonstrate that the receiver achieves a conversion gain of 30.5 dB and a 3-dB RF bandwidth of 34 GHz,while the in-band minimum noise figure is 9.9 dB. 展开更多
关键词 sub-THz receiver integrated circuits LO chain CMOS technology
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Generalized Kennedy receivers enhanced CV-QKD in turbulent channels for endogenous security of space-air-ground integrated network 认领 引用
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作者 Shouye Miao Mugen Peng +3 位作者 Renzhi Yuan Bin Cao Mufei Zhao Zhifeng Wang 《Digital Communications and Networks》 SCIE EI CSCD 2026年第2期332-342,共11页
Endogenous security in next-generation wireless communication systems attracts increasing attentions in recent years.A typical solution to endogenous security problems is the Quantum Key Distribution(QKD),where uncond... Endogenous security in next-generation wireless communication systems attracts increasing attentions in recent years.A typical solution to endogenous security problems is the Quantum Key Distribution(QKD),where unconditional security can be achieved thanks to the inherent properties of quantum mechanics.Continuous Variable-Quantum Key Distribution(CV-QKD)enjoys high Secret Key Rate(SKR)and good compatibility with existing optical communication infrastructure.Traditional CV-QKD usually employ coherent receivers to detect coherent states,whose detection performance is restricted to the standard quantum limit.In this paper,we employ a generalized Kennedy receiver called CD-Kennedy receiver to enhance the detection performance of coherent states in turbulent channels,where Equal-Gain Combining(EGC)method is used to combine the output of CD-Kennedy receivers.Besides,we derive the SKR of a post-selection based CV-QKD protocol using both CD-Kennedy receiver and homodyne receiver with EGC in turbulent channels.We further propose an equivalent transmittance method to facilitate the calculation of both the Bit-Error Rate(BER)and SKR.Numerical results show that the CD-Kennedy receiver can outperform the homodyne receiver in turbulent channels in terms of both BER and SKR performance.We find that BER and SKR performance advantage of CD-Kennedy receiver over homodyne receiver demonstrate opposite trends as the average transmittance increases,which indicates that two separate system settings should be employed for communication and key distribution purposes.Besides,we also demonstrate that the SKR performance of a CD-Kennedy receiver is much robust than that of a homodyne receiver in turbulent channels. 展开更多
关键词 CV-QKD Endogenous security Generalized Kennedy receiver Space-air-ground integrated network Turbulent channels
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The fast quality control strategy for P-wave receiver functions based on AlexNet and wiggle plot 认领 引用
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作者 Jiajun Chen Chuntao Liang Rui Xu 《Earthquake Science》 CAS CSCD 2026年第2期140-155,共16页
This paper proposes a fast quality control strategy for P-wave receiver functions based on AlexNet and wiggle plots.Receiver functions are essential tools in seismology,particularly for analyzing seismic wave propagat... This paper proposes a fast quality control strategy for P-wave receiver functions based on AlexNet and wiggle plots.Receiver functions are essential tools in seismology,particularly for analyzing seismic wave propagation and subsurface structures,such as the crust and upper mantle.However,the quality control of receiver functions is often a tedious,time-consuming process.In this study,we transform the time series classification problem of receiver function quality control problem into an image classification task by plotting receiver functions as wiggle diagrams and using the deep learning model AlexNet for binary classification to distinguish between“good”and“bad”receiver functions.The model achieved an accuracy of 92.55%on the testing set and demonstrated strong generalization performance with an accuracy of 89.23%on receiver functions of another seismic network(Sichuan Provincial Permanent Seismic Network).While maintaining strong performance,the model is capable of processing approximately 32 receiver function wiggle plots per second on an NVIDIA GeForce RTX 4050.The results show that the proposed feature mapping strategy significantly improves the efficiency and accuracy of receiver function quality control,making it a valuable tool for practical applications.Future work will focus on expanding the dataset and optimizing model performance for broader seismic data applications. 展开更多
关键词 receiver function automated quality control deep learning AlexNet wiggle plot
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Cryogenic design and analysis for a Vivaldi antenna array receiver 认领 引用
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作者 Kai Wang Jun Ma +3 位作者 Liang Cao Hao Yan Jiahui Li Xuefeng Duan 《Astronomical Techniques and Instruments》 CSCD 2026年第4期295-300,共6页
The sensitivity of a phased array receiver can be enhanced by cryogenically cooling either its low-noise amplifiers or its front-end antenna array.This study addresses the cryogenic cooling requirements of phased arra... The sensitivity of a phased array receiver can be enhanced by cryogenically cooling either its low-noise amplifiers or its front-end antenna array.This study addresses the cryogenic cooling requirements of phased array receivers.Based on a laboratory-based prototype broadband Vivaldi antenna array,we have designed a Dewar system adopting a full-array integrated cooling approach.Through thermal load analysis of the internal cryogenic structure and comparison with measured cooling temperatures from a prototype,we have validated a structural design while identifying areas for improvement.This work provides valuable insights for future integrated cooling and sensitivity optimization of phased array receivers equipped with cryogenic low-noise amplifiers. 展开更多
关键词 Radio telescope Receiver Multi-beam Phased array Cryogenics
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Optimization of nitrogen cooling for phased array receiver systems in radio astronomy 认领 引用
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作者 Mingyue Liu Zening Sun +2 位作者 Zhaomin Peng Zehao Wang Jun Shi 《Astronomical Techniques and Instruments》 CSCD 2026年第3期205-212,共8页
This study aims to enhance the thermal management of phased array receiver systems used in radio astronomy by optimizing the nitrogen-based cooling mechanism.A numerical simulation approach is used to evaluate the inf... This study aims to enhance the thermal management of phased array receiver systems used in radio astronomy by optimizing the nitrogen-based cooling mechanism.A numerical simulation approach is used to evaluate the influence of various structural and flow parameters,including the dimensions,quantity,configuration,and shape of the inlets and outlets and the nitrogen flow rate,on the cooling performance.A computational model is developed for a phased array receiver system comprising 64 groups of low-noise amplifiers,totaling 128 units.Computational fluid dynamics is used to analyze the thermal behavior across the system.The results indicate that moderate nitrogen flow velocities(ranging from 2.5 m s-1 to 3.0 m s-1)and an intermediate inlet radius(50-70 mm)offer the most efficient and uniform cooling.Additionally,a dual-inlet,dual-outlet configuration enhances the overall temperature distribution,while square inlets,which provide the same area as circular ones,improve the localized cooling performance.The optimized configuration substantially reduces thermal non-uniformity and supports stable operation under low-temperature conditions.The proposed nitrogen cooling design and configuration strategies present a practical and energy-efficient alternative to traditional cryogenic systems for phased array receiver systems.These findings provide valuable insights for future large-scale implementations in radio astronomy applications. 展开更多
关键词 Phased array receiver system Low-noise amplifier Nitrogen cooling Numerical simulation
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Leveraging ROTI map derived from Indonesian GNSS receiver network for advancing study of Equatorial Plasma Bubble in Southeast/East Asia 认领 引用 被引量：4
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作者 Prayitno Abadi Ihsan N.Muafiry +8 位作者 Teguh N.Pratama Angga Y.Putra Suraina Gatot H.Pramono Sidik T.Wibowo Febrylian F.Chabibi Umar A.Ahmad Wildan P.Tresna Asnawi 《Earth and Planetary Physics》 EI CSCD 2025年第1期101-116,共16页
This paper highlights the crucial role of Indonesia’s GNSS receiver network in advancing Equatorial Plasma Bubble(EPB)studies in Southeast and East Asia,as ionospheric irregularities within EPB can disrupt GNSS signa... This paper highlights the crucial role of Indonesia’s GNSS receiver network in advancing Equatorial Plasma Bubble(EPB)studies in Southeast and East Asia,as ionospheric irregularities within EPB can disrupt GNSS signals and degrade positioning accuracy.Managed by the Indonesian Geospatial Information Agency(BIG),the Indonesia Continuously Operating Reference Station(Ina-CORS)network comprises over 300 GNSS receivers spanning equatorial to southern low-latitude regions.Ina-CORS is uniquely situated to monitor EPB generation,zonal drift,and dissipation across Southeast Asia.We provide a practical tool for EPB research,by sharing two-dimensional rate of Total Electron Content(TEC)change index(ROTI)derived from this network.We generate ROTI maps with a 10-minute resolution,and samples from May 2024 are publicly available for further scientific research.Two preliminary findings from the ROTI maps of Ina-CORS are noteworthy.First,the Ina-CORS ROTI maps reveal that the irregularities within a broader EPB structure persist longer,increasing the potential for these irregularities to migrate farther eastward.Second,we demonstrate that combined ROTI maps from Ina-CORS and GNSS receivers in East Asia and Australia can be used to monitor the development of ionospheric irregularities in Southeast and East Asia.We have demonstrated the combined ROTI maps to capture the development of ionospheric irregularities in the Southeast/East Asian sector during the G5 Geomagnetic Storm on May 11,2024.We observed simultaneous ionospheric irregularities in Japan and Australia,respectively propagating northwestward and southwestward,before midnight,whereas Southeast Asia’s equatorial and low-latitude regions exhibited irregularities post-midnight.By sharing ROTI maps from Indonesia and integrating them with regional GNSS networks,researchers can conduct comprehensive EPB studies,enhancing the understanding of EPB behavior across Southeast and East Asia and contributing significantly to ionospheric research. 展开更多
关键词 Equatorial Plasma Bubble(EPB) GNSS receivers’network Indonesia Continuously Operating Reference Station(Ina-CORS) ionospheric map Rate of TEC change index(ROTI)map
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Sagnac-Enhanced Rydberg Superheterodyne Receiver with Dual-Beam Interference 认领 引用
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作者 Hongmei Yan Taisen Gao +7 位作者 Mingyong Jing Wenguang Yang Hao Zhang Zongkai Liu Junyao Xie Liantuan Xiao Suotang Jia Linjie Zhang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2025年第12期166-171,共6页
Increasing the number of atoms that interact with microwave fields represents a promising strategy for enhancing the sensitivity of Rydberg atom-based superheterodyne receivers.Nevertheless,the practical implementatio... Increasing the number of atoms that interact with microwave fields represents a promising strategy for enhancing the sensitivity of Rydberg atom-based superheterodyne receivers.Nevertheless,the practical implementation of this approach is impeded by adverse effects such as excitation saturation of Rydberg atoms and power broadening.Here,we demonstrate enhanced microwave field measurements based on two specific velocity groups of atoms,simultaneously addressed by dual-channel probe beams in a Sagnac loop interferometer.The application of resonance detuning in two-photon excitation enables selective addressing of atoms moving along the beam direction,thereby significantly mitigating atomic transit noise.At 7.97 GHz,our method yields a 3 dB improvement in signal-to-noise ratio(SNR),achieving a sensitivity of 10.7 nV·cm−1·Hz−1/2.This approach offers a viable pathway to further improve the sensitivity of Rydberg atom-based microwave electrometers. 展开更多
关键词 enhanced microwave field measurements Rydberg superheterodyne receiver rydberg atoms power broadeningherewe excitation saturation sagnac loop inter Sagnac enhanced enhancing sensitivity
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Feasibility of scintillation monitoring with low-cost GNSS receivers using geodetic detrending 认领 引用
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作者 Guillermo GONZÁLEZ-CASADO Jorge GARCÍA-MATEOS +5 位作者 Yu YIN Angela ARAGON-ANGEL JoséMiguel JUAN Cristhian C.TIMOTE Adria ROVIRA-GARCIA Jaume SANZ 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2025年第8期40-51,共12页
The geodetic detrending(GD)methodology was introduced in the past decade and has opened the door to the global monitoring of ionospheric scintillation using global navigation satellite system(GNSS)receivers.The perfor... The geodetic detrending(GD)methodology was introduced in the past decade and has opened the door to the global monitoring of ionospheric scintillation using global navigation satellite system(GNSS)receivers.The performance of GD has been demonstrated in geodetic receivers.However,extending scintillation monitoring to low-cost commercial receivers remains a challenge.Low-cost devices could serve as valuable complements to specialised and much more expensive scintillation monitoring receivers.In this paper,first,a feasibility study was conducted using the GD technique,demonstrating that the scintillation indices derived from the observations of two lowcost receivers(Septentrio Mosaic X5 and UBLOX ZED-F9P)have a resolution similar to that achieved by geodetic receiver models,whose price is one order of magnitude higher.Second,measurements of GNSS signals at different frequencies from the Galileo and global positioning system(GPS)satellites were analysed in a specific experiment over six days of null scintillation.Next,the noise level in the scintillation parameters derived from the experiment was evaluated,which shows that for low-cost receivers,the minimum scintillation detection threshold increases only negligibly compared to geodetic-grade receivers.Moreover,the geometry-free(GF)combination of L1 with a second signal of different frequency was investigated as an alternative to detrending GNSS signals.Finally,for determining the ionospheric fluctuations produced by scintillation,the limitations of using the GF combination versus the uncombined measurements were highlighted.It is concluded that the minimum resolution of scintillation indices derived from low-cost receiver measurements makes it possible to distinguish values associated with periods of scintillation activity from those produced by residual noise from mismodeling.For both geodetic and low-cost receivers,the scintillation detection threshold obtained with uncombined carrier-phase measurements is smaller than that achieved with the classic GF combination. 展开更多
关键词 Geodetic detrending GNSS signals Ionosphere Low-cost receivers Scintillation
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Inversion of the Deep Structure of the Northern Margin of the Ordos Block Using Teleseismic Receiver Functions and Gravity Data 认领 引用
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作者 Cui Feng-Zhi Zhang Fan +4 位作者 Li Juan Pei Dong-Yang Bai Yi-Hang Wang Lei Wang Hui 《Applied Geophysics》 SCIE CSCD 2025年第4期1425-1443,1501,1502,共19页
The Ordos Block is a critical component of the North China Craton(NCC),which is located at the northeastern edge of the Tibetan Plateau.Over the years,it has undergone complex tectonic evolution due to the influence o... The Ordos Block is a critical component of the North China Craton(NCC),which is located at the northeastern edge of the Tibetan Plateau.Over the years,it has undergone complex tectonic evolution due to the influence of multiple factors,such as the India–Eurasia plate collision,the subduction of the Pacific Plate,and the southward movement of the Siberian Plate.To investigate the crustal structure and dynamic evolution of the northern margin of the Ordos Block,this study employs joint inversion of receiver functions and gravity data and then integrates results from geology,geophysics,and geodesy.The overall results indicate that the crustal thickness shows a thickening trend from south to north.The generally high Poisson’s ratio suggests that the crust is rich in silica or subjected to high crustal stress.Furthermore,the common conversion point(CCP)stacking results identify distinct layering in the subsurface structure of the northern margin,including the Conrad discontinuity and low-velocity zones,thus reflecting its complex deep structure.Driven by the eastward growth of the Tibetan Plateau and the northwestward subduction of the Pacific Plate,the block rotates counterclockwise,playing a significant role in the formation of surrounding rift basins.The abovementioned findings emphasize the influence of surrounding tectonic activities on the crustal structure and dynamics of the northern margin of the Ordos Block,thus highlighting the potential for strong earthquakes in the region. 展开更多
关键词 Ordos Block North China Craton Receiver Function Gravity Data Poisson’s Ratio
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High-quality control of receiver functions using a capsule neural network 认领 引用 被引量：2
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作者 Mona H.Hegazi Ahmad M.Faried Omar M.Saad 《Earthquake Science》 CAS CSCD 2025年第2期93-109,共17页
The Red Sea-Gulf of Suez-Cairo-Alexandria Clysmic-Trend in northern Egypt is the main earthquake zone in the country,with a moderate-to-high seismic hazard and a history of significant earthquakes caused by rifting an... The Red Sea-Gulf of Suez-Cairo-Alexandria Clysmic-Trend in northern Egypt is the main earthquake zone in the country,with a moderate-to-high seismic hazard and a history of significant earthquakes caused by rifting and active faulting.To improve our understanding of the tectonic and seismic processes in this area,more comprehensive imaging of the crustal structure is required.This can be achieved by increasing the number of receiver functions(RFs)recorded by the seismic stations in northern Egypt and the southeastern Mediterranean.Data handling and processing should also be automated to increase process efficiency.In this study,we developed a capsule neural network for automated selection of RFs.The model was trained on a dataset containing RFs(both selected and unselected)from five broadband stations in northern Egypt.Stations SLM,SIWA,KOT,NBNS,and NKL are located in the unstable shelf region of Egypt,where limited knowledge of the deep crustal structure is available.The proposed capsule neural network achieved an average precision of 80%on the test set.The automated selection of RFs using a capsule neural network has the potential to significantly improve the efficiency and accuracy of RF analysis,as demonstrated by the stacking test.This could lead to a better understanding of crustal structure and tectonic processes in northern Egypt and the southeastern Mediterranean. 展开更多
关键词 crustal structure receiver functions deep learning northern Egypt
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Interference Cancellation Based Neural Receiver for Superimposed Pilot in Multi-Layer Transmission 认领 引用 被引量：1
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作者 Xiao Han Tian Wenqiang +4 位作者 Jin Shi Liu Wendong Shen Jia Shi Zhihua Zhang Zhi 《China Communications》 SCIE EI CSCD 2025年第1期75-88,共14页
In this paper,an interference cancellation based neural receiver for superimposed pilot(SIP)in multi-layer transmission is proposed,where the data and pilot are non-orthogonally superimposed in the same time-frequency... In this paper,an interference cancellation based neural receiver for superimposed pilot(SIP)in multi-layer transmission is proposed,where the data and pilot are non-orthogonally superimposed in the same time-frequency resource.Specifically,to deal with the intra-layer and inter-layer interference of SIP under multi-layer transmission,the interference cancellation with superimposed symbol aided channel estimation is leveraged in the neural receiver,accompanied by the pre-design of pilot code-division orthogonal mechanism at transmitter.In addition,to address the complexity issue for inter-vendor collaboration and the generalization problem in practical deployments,respectively,this paper also provides a fixed SIP(F-SIP)design based on constant pilot power ratio and scalable mechanisms for different modulation and coding schemes(MCSs)and transmission layers.Simulation results demonstrate the superiority of the proposed schemes on the performance of block error rate and throughput compared with existing counterparts. 展开更多
关键词 interference cancellation model scalability neural receiver superimposed pilot
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Crustal structure of the central Cathaysia block in South China derived from receiver functions 认领 引用 被引量：1
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作者 Ao Li Zhengyuan Jia +2 位作者 Guoming Jiang Guibin Zhang Dapeng Zhao 《Earthquake Science》 CAS CSCD 2025年第6期545-563,共19页
The Cathaysia block in Southeast China has undergone complex compression,collision and tectonic evolution processes,which have led to the formation of rich granites and polymetallic ores.However,its history of crustal... The Cathaysia block in Southeast China has undergone complex compression,collision and tectonic evolution processes,which have led to the formation of rich granites and polymetallic ores.However,its history of crustal evolution and metallogenic mechanisms remain unclear.To explore the deep geodynamic processes in the central Cathaysia block,we deployed a dense broadband seismic array with a station interval of~5 km from July 2017 to August 2020.This seismic array,composed of 80 portable stations,traverses the Nanling and Wuyi metallogenic belts and crosses four deep faults.We employ the teleseismic receiver-function method to estimate the crustal thickness and vP/vS ratio beneath the seismic array.Our results reveal a distinct negative correlation between the crustal thickness and the vP/vS ratio within the crust,which might be closely associated with crustal deformation.The average crustal thickness is~30 km,indicating that the crust was thinned under an extensional environment.However,the crust beneath the Wuyi belt is slightly thicker and has a lower vP/vS ratio than its adjacent areas,which may reflect thickening of the upper crust due to its ductility and lithospheric delamination. 展开更多
关键词 receiver functions crustal thickness vP/vS ratio metallogenic mechanism Cathaysia block
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A 112 Gbps DSP-based PAM4 SerDes receiver with a wide band equalization tuning AFE in 7 nm FinFET 认领 引用 被引量：1
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作者 Huanan Guo Yufeng Yao +1 位作者 Jiazhen Ni Xiang Gao 《Journal of Semiconductors》 EI CAS CSCD 2025年第6期44-52,共9页
In DSP-based SerDes application,it is essential for AFE to implement a pre-ADC equalization to provide a better sig-nal for ADC and DSP.To meet the various equalization requirements of different channel and transmitte... In DSP-based SerDes application,it is essential for AFE to implement a pre-ADC equalization to provide a better sig-nal for ADC and DSP.To meet the various equalization requirements of different channel and transmitter configurations,this paper presents a 112 Gbps DSP-Based PAM4 SerDes receiver with a wide band equalization tuning AFE.The AFE is realized by implementing source degeneration transconductance,feedforward high-pass branch and inductive feedback peaking TIA.The AFE offers a flexible equalization gain tuning of up to 17.5 dB at Nyquist frequency without affecting the DC gain.With the pro-posed AFE,the receiver demonstrates eye opening after digital FIR equalization and achieves 6×10-9 BER with a 29.6 dB inser-tion loss channel. 展开更多
关键词 AFE 112Gbps SerDes receiver wide band equalization
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Optimization strategies for operational parameters of Rydberg atom-based amplitude modulation receiver 认领 引用
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作者 Yuhao Wu Dongping Xiao +1 位作者 Huaiqing Zhang Sheng Yan 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第1期280-287,共8页
The Rydberg atom-based receiver, as a novel type of antenna, demonstrates broad application prospects in the field of microwave communications. However, since Rydberg atomic receivers are nonlinear systems, mismatches... The Rydberg atom-based receiver, as a novel type of antenna, demonstrates broad application prospects in the field of microwave communications. However, since Rydberg atomic receivers are nonlinear systems, mismatches between the parameters of the received amplitude modulation(AM) signals and the system's linear workspace and demodulation operating points can cause severe distortion in the demodulated signals. To address this, the article proposes a method for determining the operational parameters based on the mean square error(MSE) and total harmonic distortion(THD) assessments and presents strategies for optimizing the system's operational parameters focusing on linear response characteristics(LRC) and linear dynamic range(LDR). Specifically, we employ a method that minimizes the MSE to define the system's linear workspace, thereby ensuring the system has a good LRC while maximizing the LDR. To ensure that the signal always operates within the linear workspace, an appropriate carrier amplitude is set as the demodulation operating point. By calculating the THD at different operating points, the LRC performance within different regions of the linear workspace is evaluated, and corresponding optimization strategies based on the range of signal strengths are proposed. Moreover, to more accurately restore the baseband signal, we establish a mapping relationship between the carrier Rabi frequency and the transmitted power of the probe light, and optimize the slope of the linear demodulation function to reduce the MSE to less than 0.8×10-4. Finally, based on these methods for determining the operational parameters, we explore the effects of different laser Rabi frequencies on the system performance, and provide optimization recommendations. This research provides robust support for the design of high-performance Rydberg atom-based AM receivers. 展开更多
关键词 Rydberg atom-based receiver amplitude modulation(AM) operating parameters optimization
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Investigation of Near-Surface S-Wave Velocity Structure beneath the Epicenter and adjacent Area of the Jishishan Earthquake by using the Receiver Function 认领 引用
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作者 Fan-chang Meng Ruo-ge Xu +2 位作者 Hui Sun Bo Li Yun Long 《Applied Geophysics》 SCIE CSCD 2025年第3期647-659,893,共13页
Based on the observational data from 60 short-period stations deployed in the Jishishan M6.2 earthquake epicenter and adjacent regions(Gansu Province,2023),this study inverted the near-surface S-wave velocity structur... Based on the observational data from 60 short-period stations deployed in the Jishishan M6.2 earthquake epicenter and adjacent regions(Gansu Province,2023),this study inverted the near-surface S-wave velocity structure through teleseismic receiver function analysis by using the amplitude of direct P-wave.The results reveal that the epicentral area(Liugou Township and surroundings)exhibits markedly low S-wave velocities of 400-600 m/s,with a mean value of(500±50)m/s.In contrast,intermountain basins-Guanting Basin and Dahejia Basin-demonstrate significantly elevated velocities,exceeding the epicentral zone by 100-300 m/s,with values concentrated at 600-900 m/s.Notably,localized areas such as Jintian Village and Caotan Village maintain stable S-wave velocities of(700±30)m/s.The western margin tectonic belt of Jishishan displays distinctive velocity differentiation:A pronounced velocity gradient zone along the 35.8°N latitude boundary separates northern areas(750 m/s).These findings demonstrate significant spatial heterogeneity in shallow S-wave velocity structures,primarily controlled by three factors:(1)topographic-geomorphic units,(2)stratigraphic lithological contrasts,and(3)anthropogenic modifications.The persistent low-velocity anomalies(<600 m/s)in the epicentral zone and northern Yellow River T2 terrace likely correlate with Quaternary unconsolidated sediments,enhanced groundwater circulation,and bedrock weathering.These results provide critical geophysical constraints for understanding both the seismogenic environment of the Jishishan earthquake and its damage distribution patterns.Furthermore,they establish a foundational framework for regional seismic intensity evaluation,site amplification analysis,and secondary hazard risk assessment. 展开更多
关键词 Jishishan Earthquake Dense Seismic Array Receiver Function S-Wave Velocity Structure
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Joint Passive Beamforming and Splitting Ratio Optimization for IRS-Aided Power Splitting Receiver 认领 引用
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作者 Zhou Yuanpeng Li Li +2 位作者 Wang Yanyan Lei Xianfu Tang Xiaohu 《China Communications》 SCIE EI CSCD 2025年第8期44-57,共14页
As a novel signaling technology,the power splitting receiver(PSR)simultaneously employs both the coherent and non-coherent signal processing.In order to improve its communication performance,an intelligent reflecting ... As a novel signaling technology,the power splitting receiver(PSR)simultaneously employs both the coherent and non-coherent signal processing.In order to improve its communication performance,an intelligent reflecting surface(IRS)is introduced into its signal propagation path.Consequently,an IRSaided PSR is concerned for a point-to-point(P2P)data link,where both the single-antenna and multiantenna deployments on the receiver are discussed.We aim at maximizing the capacity of the concerned P2P data-link by jointly optimizing the passive beamforming of IRS and the splitting ratio of PSR,either in single-antenna or multi-antenna case.However,owing to the coupling of multiple variables,the optimization problems are non-convex and challenging,especially in the later multi-antenna case.The proposed alternating-approximating algorithm(A-A),aided by semi-definite relaxation(SDR)and successive convex approximation(SCA)methods,etc.,successfully overcomes these challenges.We compare the IRS-aided PSR system that optimized by our proposed algorithm to the systems without IRS or PSR,and the systems without joint optimization.The simulation results show that our proposal has a better performance. 展开更多
关键词 alternating optimization intelligent reflecting surface joint optimization power splitting receiver
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Joint Optimization of Resource Allocation and Radar Receiver Selection in Integrated Communication-Radar Systems 认领 引用
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作者 Zhong Chen Zhou Xufeng +1 位作者 Tang Lan Lou Mengting 《China Communications》 SCIE EI CSCD 2025年第8期114-133,共20页
In this paper,we investigate a distributed multi-input multi-output and orthogonal frequency division multiplexing(MIMO-OFDM) dual-functional radar-communication(DFRC) system,which enables simultaneous communication a... In this paper,we investigate a distributed multi-input multi-output and orthogonal frequency division multiplexing(MIMO-OFDM) dual-functional radar-communication(DFRC) system,which enables simultaneous communication and sensing in different subcarrier sets.To obtain the best tradeoff between communication and sensing performance,we first derive Cramer-Rao Bound(CRB) of targets in detection area,and then maximize the transmission rate by jointly optimizing the power/subcarriers allocation and the selection of radar receivers under the constraints of detection performance and total transmit power.To tackle the non-convex mixed integer programming problem,we decompose the original problem into a semidefinite programming(SDP) problem and a convex quadratic integer problem and solve them iteratively.The numerical results demonstrate the effectiveness of our proposed algorithm,as well as the performance improvement brought by optimizing radar receivers selection. 展开更多
关键词 alternative optimization DFRC system MIMO-OFDM power/subcarrier allocation radar receivers selection
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A Transformer-Based End-to-End Receiver Design for Wi-Fi 7 Physical Layer 认领 引用
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作者 LIU Yichen GAO Ruixin +1 位作者 ZENG Chen LIU Yingzhuang 《ZTE Communications》 2025年第4期27-36,共10页
The increasing demand for high throughput and low latency in Wi-Fi 7 necessitates a robust receiver design.Traditional receiver architectures,which rely on a cascade of complex,independent signal processing modules,of... The increasing demand for high throughput and low latency in Wi-Fi 7 necessitates a robust receiver design.Traditional receiver architectures,which rely on a cascade of complex,independent signal processing modules,often face performance bottlenecks.Rather than focusing on semantic-level tasks or simplified Additive White Gaussian Noise(AWGN)channels,this paper investigates a bit-level end-toend receiver for a practical Wi-Fi 7 Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing(MIMO-OFDM)physical layer.A lightweight Transformer-based encoder-only architecture is proposed to directly map synchronized OFDM signals to decoded bit⁃streams,replacing the conventional channel estimation,equalization,and data detection.By leveraging the multi-head self-attention mecha⁃nism of the Transformer encoder,our model effectively captures long-range spatial–temporal dependencies across antennas and subcarriers,thus learning to compensate for channel distortions without explicit channel state information.This mechanism eliminates the need for ex⁃plicit channel estimation,enabling the direct extraction of crucial channel and signal features.Experimental results validate the efficacy of the proposed design,demonstrating the significant potential of deep learning for future wireless receiver architectures. 展开更多
关键词 Transformer receiver design Wi-Fi 7 deep learning
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Optimal Receiver Operating Characteristic Curve of Classical Conditional Power under Normal Models 认领 引用
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作者 ZHANG Ying-Ying 《应用概率统计》 CSCD 北大核心 2025年第2期277-304,共28页
A Receiver Operating Characteristic(ROC)analysis of a power is important and useful in clinical trials.A Classical Conditional Power(CCP)is a probability of a classical rejection region given values of true treatment ... A Receiver Operating Characteristic(ROC)analysis of a power is important and useful in clinical trials.A Classical Conditional Power(CCP)is a probability of a classical rejection region given values of true treatment effect and interim result.For hypotheses and reversed hypotheses under normal models,we obtain analytical expressions of the ROC curves of the CCP,find optimal ROC curves of the CCP,investigate the superiority of the ROC curves of the CCP,calculate critical values of the False Positive Rate(FPR),True Positive Rate(TPR),and cutoff of the optimal CCP,and give goo go decisions at the interim of the optimal CCP.In addition,extensive numerical experiments are carried out to exemplify our theoretical results.Finally,a real data example is performed to illustrate the goo go decisions of the optimal CCP. 展开更多
关键词 area under the curve(AUC) classical conditional power(CCP) goo go decisions historical and interim data receiver operating characteristic(ROC)curve
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