一类混沌二相编码脉冲压缩的性能分析

Analysis of Pulse Compression Performance for a Type of Chaotic Biphase Codes

研究了一类混沌信号的二相编码问题。混沌信号对初值非常敏感,能产生大量的二相混沌码,从中可筛选出压缩性能比较好的二相码。在Matlab上的仿真表明,这种二相码具有较高的主副瓣比且数量较多,显示了较好的应用前景。还对该类二相码序列的长度N的大小取值、不同码长的二相码的最大主副瓣比值进行了探讨。分析了长度N、混沌序列初值以及二相码的位数对脉压性能的影响,并给出了最佳结果,可供工程应用参考。因篇幅所限,没有对该类二相码的多普勒性能及脉冲压缩的实现方法作进一步讨论。

The biphase coding for a type of chaotic signal is studied. A lot of chaotic binary phase-coded signals will be produced because chaos is sensitive to the initial value, and some binary phase-coded signab with a good compression performance can be sorted out. The simulation on the Matlab shows that this type of binary phase-coded signal feutures a high mainlobe-to-sidelobe ratio and a large number of codes, and it has good application prospects. The length /V of a binary phase-coded signal and the maximum mainlobe-to-sidelobe ratio with different lengths of binary phase-coded signals are also discussed.