一种新的二进制偏移载波调制信号无模糊度捕获算法

发布时间：2018-05-13 02:44

  本文选题：BOC调制 + 多峰性　； 参考：《中国惯性技术学报》2014年06期

【摘要】：二进制偏移载波(BOC,Binary Offset Carrier)调制有效地解决了导航信号间的相互干扰,实现了频谱资源的有效利用。针对BOC信号的自相关函数在±1码片内存在多个正负峰,易造成误捕旁峰和漏捕信号的风险,通过分析了BOC信号中单个码片内调制的矩形脉冲之间的周期延拓关系,确定一个基准单元,将BOC信号可分离成基准单元和基准单元经一系列周期延拓后相加,基于此实现BOC信号自相关函数的分离。根据对称性,可重构一个峰值较低单峰,基于产生的单峰与BOC信号自相关函数相乘即可消除多峰并提高中心主峰峰值。BOCs(2,1)、BOCs(3,2)和BOCc(2,1)信号仿真结果表明,该方法能完全消除信号的旁峰,适用于任意阶数的正弦或余弦相位BOC信号的捕获,而且保留了BOC信号窄相关峰特性,峰宽度为1/k个码片。
[Abstract]:Binary offset carrier binary Offset Carrier modulation effectively solves the interference between navigation signals and realizes the efficient utilization of spectrum resources. In view of the fact that the autocorrelation function of BOC signal has many positive and negative peaks in 卤1 chip, it is easy to cause the risk of false capture of sidelobe and leakage of the signal. The periodic continuation relationship between the rectangular pulses modulated in a single code chip in BOC signal is analyzed. A reference unit is determined and the BOC signal can be separated into a reference unit and a reference unit which are added after a series of periods. Based on this, the autocorrelation function of the BOC signal can be separated. According to symmetry, a low peak can be reconstructed. Based on the multiplying of the generated single peak with the autocorrelation function of BOC signal, the multi-peak can be eliminated and the central main peak value can be increased. The simulation results show that the method can eliminate the side peak of the signal completely. It is suitable for the acquisition of sinusoidal or cosine phase BOC signals of arbitrary order, and the narrow correlation peak characteristics of BOC signals are preserved, with a peak width of 1 / k code pieces.
【作者单位】： 华东交通大学信息工程学院;
【基金】：国家自然科学基金资助项目(61162015)
【分类号】：TN96.1
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本文编号：1881325