微弱GPS信号捕获算法的研究  

Research of Acquisition Algorithm of Weak GPS Signal

作　　者：许庆涛[1] 王延太[1] 刘茜[1] 吕明双[1] 

机构地区：[1]山东大学信息科学与工程学院,山东济南250100

出　　处：《电气电子教学学报》2009年第3期50-52,55,共4页Journal of Electrical and Electronic Education

摘　　要：GPS件接收机在低信噪比的环境中,普通捕获算法不能实现理想的捕获效果。采用增加相干积分时间、处理相干积分后的数据和改进传统非相干算法的方法,显著提高了信噪比,有效地消除了传统非相干算法中的平方损耗。通过对不同的捕获算法仿真比较得出,改进的算法有更强的信号检测能力,处理增益更高。In the low SNR environments, such as indoor and in forests, common algorithm could not attain ideal acquisition results. By increasing time of coherent integral, processing data of coherent integral and ameliorating traditional non-coherent algorithm, SNR is improved remarkably and square loss of traditional non-coherence algorithm has been eliminated effectively. By comparing with other acquisition algorithms, simulation results denote that the ameliorated algorithm provides stronger capacity of detecting signal and higher processing gain.

关 键 词：GPS 捕获算法 非相干算法 

分 类 号：TP911.23[自动化与计算机技术] P228.4[天文地球—大地测量学与测量工程]