新型卫星导航复用调制信号的单路分离方法  

A Single Channel Separation Algorithm for New Multiplexing Satellite Navigation Signals

作　　者：卢虎[1] 廉保旺[2] 闫浩[2] 

机构地区：[1]空军工程大学信息与导航学院,西安710077 [2]西北工业大学电子与信息学院,西安710072

出　　处：《西安交通大学学报》2016年第12期32-37,135,共7页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(61473308;61174194)

摘　　要：针对卫星导航信号时/频/调制域正交特性实现单路分离的传统方法不再适用于复杂多路复用信号分离的问题,提出了一种新型卫星导航复用调制信号的单路分离方法。该方法利用不同支路上数据码的随机特性,设计了多支路混合信号的周期掩码累加准则,通过计算各支路比特符号掩码累加值的残留度和补偿因子,获得使对应非期望支路累加和为零的乘积系数,实现了期望信号的单路分离。理论和实验分析表明,相较于非单路分离的传统评估方法,所提单路分离方法的载波相位分辨率优于5°、码元位置分辨率优于0.01%,可精确直观地反映基带信号在时/频/调制等域的畸变情况,为新型导航信号定量评估和处理提供了很好的技术支持。A new single-channel separation algorithm for satellite navigation signals is proposed to solve the problem that traditional separation methods that use signal＇s time/frequency/ modulation domain orthogonal characteristics are no longer suitable for the complex modulation signals. The random characteristics in different channels are used to design a periodic mask accumulation rule for the multi-channel mixed signals. The residuals and compensation factors of mask accumulated values for each branch are calculated to obtain the product coefficients which let the accumulation sum of corresponding undesired channels get zero. Then the desired separation of the signals is achieved. Simulation and testing results, as well as comparison with a traditional evaluation method without separation, show that the carrier phase resolution and the pseudo-random code symbol resolution of the proposed separation algorithm are better than 5% and 0.01%, respectively, and that the algorithm accurately shows the time/frequency/modulation domain distortion of baseband signal. The proposed separation algorithm may provide a technical support for the quantitative evaluation and processing of the next generation navigation signals.

关 键 词：卫星导航 复用调制 信号分离 周期掩码累加 

分 类 号：TN911.6[电子电信—通信与信息系统] TN98[电子电信—信息与通信工程]