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ERASED-CHASE DECODING FOR RS-CODED MPSK SIGNALING OVER A RAYLEIGH FADING CHANNEL 认领 引用
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作者 Xu Chaojun Sun Yue Wang Xinmei 《Journal of Electronics(China)》 2007年第3期296-300,共5页
In this paper,a novel dual-metric,the maximum and minimum Squared Euclidean Distance Increment (SEDI) brought by changing the hard decision symbol,is introduced to measure the reli-ability of the received M-ary Phase ... In this paper,a novel dual-metric,the maximum and minimum Squared Euclidean Distance Increment (SEDI) brought by changing the hard decision symbol,is introduced to measure the reli-ability of the received M-ary Phase Shift Keying (MPSK) symbols over a Rayleigh fading channel. Based on the dual-metric,a Chase-type soft decoding algorithm,which is called erased-Chase algorithm,is developed for Reed-Solomon (RS) coded MPSK schemes. The proposed algorithm treats the unre-liable symbols with small maximum SEDI as erasures,and tests the non-erased unreliable symbols with small minimum SEDI as the Chase-2 algorithm does. By introducing optimality test into the decoding procedure,much more reduction in the decoding complexity can be achieved. Simulation results of the RS(63,42,22)-coded 8-PSK scheme over a Rayleigh fading channel show that the proposed algorithm provides a very efficient tradeoff between the decoding complexity and the error performance. Finally,an adaptive scheme for the number of erasures is introduced into the decoding algorithm. 展开更多
关键词 Reed-Solomon （RS） codes Coded M-ary Phase Shift Keying （MPSK） Rayleigh fading Dual-metric Chase decoding
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Low complexity Chase-2 decoding of concatenated codes 认领 引用 被引量：2
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作者 LIU XiaoJian ZHAO ChunMing SUN XiaoJun 《Chinese Science Bulletin》 2010年第26期3066-3070,共5页
The concatenated codes are widely used in current communication systems,such as satellite communication systems and WiMAX system.The objective of this study was to present a low complexity iterative soft decoding algo... The concatenated codes are widely used in current communication systems,such as satellite communication systems and WiMAX system.The objective of this study was to present a low complexity iterative soft decoding algorithm for concatenated codes.The concatenation was between a Reed-Solomon(RS)code and recursive systematic convolutional(RSC)code.The reduction in computational complexity was achieved by simplifying the Chase-2 decoder for RS codes with limited usage of test patterns.The processing of soft information between inner and outer decoders was also discussed.Simulation results showed that the proposed algorithm could achieve a good trade-off between complexity and performance. 展开更多
关键词 concatenated code RS code RSC code Chase decoding algorithm BCJR
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