摘要
针对多径衰落条件下的空时分组编码多载波码分多址(STBC-MC-CDMA)信号检测问题,在分析信号模型的基础上,提出了一种期望值最大化(EM)框架下基于序贯蒙特卡洛(SMC)的盲检测算法。首先对接收的信号按用户数进行分解,然后估计各分信号的未知参量,并将结果反馈,进行循环运算,最后得到各用户的信息序列。仿真结果表明,与其他算法相比,性能更加优异,当用户数不超过10、扩频码长度G>16、信噪比大于6 dB时,恢复出的信息序列误码率低于10-2。
This paper introduces an algorithm for blind detection of space-time block coded muhicarrier code division multiple aeeess（STBC-MC-CDMA） signals. Firstly, the signal is decomposed by expectation maximization（EM） method according to the number of users, then sequential Monte Carlo （SMC） is used to estimate the unknown parameters, which feedback for the purpose of iterative computation. Simulation results show that the proposed algorithm outperforms other algorithms, when user numbers is less than 10, spreading code length is greater than 16 and SNR is greater than 6dB, the bit error rate is less than 0.01.
出处
《电子技术应用》
北大核心
2014年第7期112-115,共4页
Application of Electronic Technique
基金
国家自然科学基金(61102167)
