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研究了空间频率分集MIMO-OFDM系统的DFE-SDR译码算法,提出了一种能充分利用空间分集、空间复用、频率复用增益,且能对抗时间选择性和频率选择性衰落的空时频率分集MIMO-OFDM系统,结合判决反馈均衡(DFE)以及半定松弛检测(SDR)的优点,经过推导得到一种应用在空时频率分集MIMO-OFDM系统的DFE-SDR检测方法,该算法能同时得到较理想的系统性能和算法复杂度。根据该算法给出了具体的系统仿真分析过程,证明该算法与DFE检测算法相比,误码率性能得到了较大提高,是一种有实用价值的译码算法。
The DFE-SDR decoding algorithm for spatial frequency-diversity MIMO-OFDM systems is studied. A space-time, space-time, space-frequency multiplexed gain and space-time response to time-selective and frequency-selective fading Combining the advantages of decision feedback equalization (DFE) and semi-deterministic relaxation detection (SDR), a DFE-SDR detection method is proposed for frequency-diversity MIMO-OFDM systems. At the same time get better system performance and algorithm complexity. According to this algorithm, a detailed system simulation analysis process is given. It is proved that the proposed algorithm has a much higher bit error rate (BER) performance compared with the DFE detection algorithm. It is a practical decoding algorithm.