An Efficient Joint Convolutional Code (CC)-coded DQPSK Method
In digital communications,90 or 180 degree phase ambiguity between the receiver and transmitter carrier is a serious problem for the coherent demodulation.To remove their phase ambiguity,differential quadrature phase shift keying (DQPSK) was proposed with the cost of a remarkable 2.4 dB performance degradation.Based on the iterative decoding (ID) scheme,an efficient joint convolutional code (CC)-coded DQPSK method is proposed to close the gap between quadrature phase shift keying (QPSK) and DQPSK.Using the extrinsic information transfer (EXIT) chart technique,we unveil that the low-complexity convolutional codes outperform the highcomplexity Turbo codes for the ID scheme.Simulation results turn out that the proposed scheme can overcome the error-floor effect,and achieve almost 3.54 dB and 0.9 dB signal-to-noise ratio (SNR) gain compared with the non-iterative CC at 10?5 Bit Error Rate (BER)and iterative Turbo schemes at 10?7 BER,respectively.
differential quadrature phase shift keying(DQPSK) iterative decoding Bahl-Cocke-Jelinek-Raviv(BCJR) algorithm convolutional code(CC) Turbocode
Ying Cui Zhanji Wu Xiang Gao Zhiyu Xiao
School of Information and Communication Engineering Beijing University of Posts & Telecommunications Huawei Technology Limited Corporation, Chengdu, 610041, China
国际会议
2012 IEEE 14th International Conference on Communication Technology(2012年第十四届通信技术国际会议(ICCT 2012))
成都
英文
1176-1180
2012-11-09（万方平台首次上网日期，不代表论文的发表时间）