有效抑制多径干扰的MCCS复合系统性能研究

Performance of the MCCS multiplex system for efficiently suppressing MPI

m_W复合系统应用m_W序列作为链接序列的内部序列,但是m_W序列的相关特性和对同步时钟的敏感性限制了复合系统抑制多径干扰的能力.提出了一种全新结构的链接序列,即利用完备互补序列(CCS)和修整完备互补序列(MCCS)替代m_W序列作为链接序列的内部序列,并构建CCS复合系统和MCCS复合系统,建立了系统仿真平台.提出了应用"反增益"参量对复合系统抑制多径干扰的性能进行评估.仿真结果表明MCCS复合系统抑制多径干扰的能力得到了明显提升.

The multiplex system based on m_W sequences uses m_W sequences as the interior sequences, but the sensitivity of m_W sequences to system synchronization precision degrades the performance of multi-path interference （MPI） suppression. This paper introduces two improved multiplex systems which use modified complete complementary series （MCCS） and complete complementary series （CCS） as their interior sequences respectively. Due to the perfect correlation performance of MCCS and CCS, these improved multiplex systems more effectively suppress MPI in systems. The simulation was executed and the parameter named reciprocal-gain was used to evaluate the performance of the improved multiplex systems. Experimental data proves that the multiplex system based on MCCS effectively suppresses PMI.