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Joint receiving mechanism based on blind equalization with variable step size for M-QAM modulation 认领 引用 被引量：1
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作者 卢继华 Abdallah Elhirtsia AHMED +1 位作者 王晓华 Kheddar BOUDJEMAA 《Journal of Beijing Institute of Technology》 EI CAS 2015年第3期381-386,共6页
The problem of inter symbol interference（ ISI） in wireless communication systems caused by multipath propagation when using high order modulation like M-Q AMis solved. Since the wireless receiver doesn＇t require a ... The problem of inter symbol interference（ ISI） in wireless communication systems caused by multipath propagation when using high order modulation like M-Q AMis solved. Since the wireless receiver doesn＇t require a training sequence,a blind equalization channel is implemented in the receiver to increase the throughput of the system. To improve the performances of both the blind equalizer and the system,a joint receiving mechanismincluding variable step size（ VSS） modified constant modulus algorithms（ MC-MA） and modified decision directed modulus algorithms（ MD DMA） is proposed to ameliorate the convergence speed and mean square error（ MSE） performance and combat the phase error when using high order QAM modulation. The VSS scheme is based on the selection of step size according to the distance between the output of the equalizer and the desired output in the constellation plane. Analysis and simulations showthat the performance of the proposed VSS-MCMA-MD DMA mechanismis better than that of algorithms with a fixed step size. In addition,the MCMA-MDDMA with VSS can performthe phase recovery by itself. 展开更多
关键词 inter symbol interference（ISI） modified constant modulus algorithm（MCMA） modified decision directed modulus algorithm（MDDMA） variable step size blind equalization phase rotation
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Blind equalization of underwater acoustic channel using a combined constant modulus algorithm 认领 引用 被引量：1
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作者 WANG Feng ZHAO Junwei LI Hongsheng 《Chinese Journal of Acoustics》 2003年第3期268-273,共6页
A kind of Combined Constant Modulus Algorithm (CCMA) is presented to compensate the defects of the Constant Modulus Algorithm (CMA) and the Sign Error CMA (SECMA). And CCMA is applied to the equalization of the underw... A kind of Combined Constant Modulus Algorithm (CCMA) is presented to compensate the defects of the Constant Modulus Algorithm (CMA) and the Sign Error CMA (SECMA). And CCMA is applied to the equalization of the underwater acoustic channel (UWAC). Based on the decision of the equalizer’s output, its iteration process switches between 展开更多
关键词 CCMA in it of Blind equalization of underwater acoustic channel using a combined constant modulus algorithm is length SWC MSE
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The Study of the Estimate of Poly-Spectra and Blind Equalizer 认领 引用
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作者 Wu Jianhua directed by Liu Zemin 《The Journal of China Universities of Posts and Telecommunications》 1998年第2期81-82,共2页
关键词 polyspectra cumulant algorithm,blind equalization
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