分布式MIMO-OFDM定时同步算法的研究及比较

摘要

Multiple input multiple output-orthogonal frequency division multiplexing MIMO-OFDM technology is the core of the next generation(4G) of communication technology. MIMO-OFDM has the advantages of high spectrum efficiency, strong anti-interference capability and large Channel capacity. Distributed MIMO-OFDM system can produce time delay and frequency offset. It is also very sensitive to the timing and frequency offset. So, the study of distributed MIMO-OFDM synchronization algorithm is more practical significance. The article made a comprehensive analysis and summary from the sequence structure and the performance of these three current kinds of distributed MIMO-OFDM timing synchronization algorithm, and through the MATLAB simulation comparison. It acquires to use CAZAC sequence as subcarrier data reverse conjugate timing algorithm has outstanding performance.%多输入多输出-正交频分复用(MIMO-OFDM)技术是下一代4G 通信的核心技术，具有频谱利用率高，抗干扰能力强，信道容量大等优点。分布式MIMO-OFDM系统会产生多时延、多频偏，同时对定时和频偏非常敏感，所以对分布式MIMO-OFDM同步算法的研究更加具有实际意义。文章对目前三种分布式MIMO-OFDM定时同步算法从序列结构，性能做了全面的比较分析与总结，并通过MATLAB仿真进行比较，得出运用CAZAC序列作为子载波数据的反向共轭定时算法性能突出。