CAJ | 학술논문

为了在多径信道中实现精确的符号定时估计，提出一种利用后向搜索的方式来提高同步算法在多径信道下的性能。分析分布式MIMO-OFDM系统模型，在OVPSP算法的基础上进行改进，提出多径信道下符号定时的改进算法，能够在路径损耗严重的多径瑞利衰落信道下，实现分布式MIMO-OFDM系统的精确定时估计，并通过Matlab仿真进行分析。仿真结果证明：该方法比传统的符号定时算法精度提高了30%，能实现更为精确的定时，有较好的应用前景。
위료재다경신도중실현정학적부호정시고계，제출일충이용후향수색적방식래제고동보산법재다경신도하적성능。분석분포식MIMO-OFDM계통모형，재OVPSP산법적기출상진행개진，제출다경신도하부호정시적개진산법，능구재로경손모엄중적다경서리쇠락신도하，실현분포식MIMO-OFDM계통적정학정시고계，병통과Matlab방진진행분석。방진결과증명：해방법비전통적부호정시산법정도제고료30%，능실현경위정학적정시，유교호적응용전경。
For realizing accuracy signal timing estimation in multipath channel, introduce a back forward searching algorithm to improve synchronization algorithm performance in multipath channel. Analyze distributed MIMO-OFDM system model, based on OVPSP algorithm to improve, introduce signal time improved algorithm based on multipath channel. Based on path damage multipath rayleigh fading channel, realize distributed MIMO-OFDM system accurate timing estimation, and analyze it by Matlab simulation. Simulation result shows that the algorithm accuracy improves 30%compared with traditional signal, and realizes more accurate timing and has a good application prospects.