基于预检测通道的新体制GNSS信号捕获方法  

Acquisition Method of New System GNSS Signals Based on the Pre-detection Channel

作　　者：盖世豪 刘应刚[1] 孟海涛[1] 杨文津 

机构地区：[1]中国人民解放军61711部队 [2]卫星导航系统与装备技术国家重点实验室

出　　处：《无线电工程》2017年第12期38-42,共5页Radio Engineering

摘　　要：以二进制偏置载波调制(Binary Offset Carrier,BOC)信号为主体的新体制全球卫星导航系统(Global Navigation Satellite System,GNSS)信号接收基带处理技术已成为未来卫星导航接收机设计的重要内容。针对该类信号由频谱主瓣分离特性与自相关函数多峰特性引发的信号捕获过程平均搜索时间长、捕获精度低的问题,将基于单边带的BPSKlike信号检测技术与传统联合边带信号检测技术相结合,提出一种适用于工程设计的基于预检测通道的双通道捕获方法,给出了该方法的设计思想与运行原理,从检测概率与平均捕获时间两方面对该方法进行了使用性能分析。并通过硬件接收机测试平台对该方法进行测试,证明了所提方法的有效性。The receiving-baseband processing technology of new system Global Navigation Satellite System（ GNSS） signals mainly based on the Binary Offset Carrier（ BOC） signals has already been one of the most important parts of designing GNSS receivers in the future.For this kind of signals,long mean search and low acquisition performance are caused by separating spectrum mainlobe and multi-peaks autocorrelation.In view of these problems,this paper puts forward a kind of parallel-channel acquisition method based on pre-detection channel by combining the joint sideband detection with the BPSK-like acquisition technologies,which is applicable to engineer design. It introduces the design idea and operation principle of the proposed method,and analyzes the performance of acquisition module in terms of probability and average time of acquisition process. This method is tested by using GNSS receiver hardware test platform,and the test results show that the proposed method is available.

关 键 词：全球卫星导航系统 捕获 二进制偏置载波调制 BPSK-like 联合边带 

分 类 号：TN911.3[电子电信—通信与信息系统]