【摘要】 正交空时分担编码(OSTBC)技术可以提高信道容量和误码性能,准静态平坦衰落信道和时变平坦衰落信道下正交空时分组编码率的信号检测技术得到广泛研究。利用正交频分复用技术(OFDM),研究了时变多径衰落信道下OSTBC-OFDM的信号检测方法,提出了一种能够有效利用无线信道的多径传播效应的发射天线数目等于4的OSTBC信号检测算法,仿真结果表明,发射天线书等于4,接收天线数等于2时,与已有信号检测算法相比,提出的算法有4.5dB性能增益。更多还原

【Abstract】 Orthogonal space-time block coding(OSTBC) technigue could improve channel capacity and reduce bit error rate,and its singal dectection technology over both quasi-static and time-selective flat fading channel is intensively studied.Based on the technology of orthogonal frequency division multiplexing(OFDM),this paper discusses the signal detection method of OSTBC-OFDM systems over time-selective multi-path fading channel,and proposes a signal dectection algorithm of OSTBC system with four transmit antennas,which could effectively make use of the multipath effect of wireless channel.The simulation indicates that the proposed algorithm of OSTBC-OFDM system,with four transmit anfennas and two receive antennas may achieve a performance gain of 4.5 dB as compared with the existing algorithm.更多还原