利用多相关器的伪码测距多址干扰抑制算法性能分析

发布时间：2018-02-04 19:01

  本文关键词： 卫星导航 多址干扰 早迟坡度技术 双差相关器技术 并行干扰对消　出处：《信号处理》2014年12期 　论文类型：期刊论文

【摘要】：伪码跟踪多相关器技术广泛应用于导航接收机抗多径和导航信号质量监测。论文通过对比分析多径和多址信号对导航信号相关峰畸变的影响,揭示了多相关器技术可用于多址干扰抑制。通过仿真分析了多址误差随期望接收信号与干扰信号功率差和载波多普勒频率差的变化规律,并与传统的并行多址干扰对消方法进行了对比。仿真结果表明当多址干扰信号功率差小于10d B时,ELS和Double-delta与单级并行干扰对消方法的性能相当,但是实现复杂度大大降低。
[Abstract]:Pseudo-code tracking multi-correlator technology is widely used in navigation receiver anti-multipath and navigation signal quality monitoring. This paper analyzes the effect of multi-path and multi-access signal on the correlation peak distortion of navigation signal. The multiple correlator technique can be used to suppress multiple access interference. The variation of multiple access error with the power difference between the received signal and the interference signal and the carrier Doppler frequency difference is analyzed by simulation. The simulation results show that the power difference of the multiple access interference signal is less than 10dB. The performance of ELS and Double-delta is comparable to that of single stage parallel interference cancellation, but the implementation complexity is greatly reduced.
【作者单位】： 国防科技大学电子科学与工程学院;
【基金】：国家自然科学基金(61403413)
【分类号】：TN96.1
【正文快照】： 1引言卫星导航系统中的伪距测量受多种误差因素的影响,传统观点认为多址干扰对卫星导航系统的伪距测量影响不大。但当某些卫星信号遭遇严重衰减时,来自强信号的多址干扰将显著影响到弱信号的捕获和跟踪[1-3];或者随着卫星运动多址干扰信号与期望信号的频率变化至特定关系时多，

本文编号：1490918