适用于北斗GNSS-R接收机的反射信号捕获算法

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英文篇名：A reflected signal acquisition algorithm for Beidou GNSS-R receiver 作者：杨锐 ; 黄海生 ; 李鑫 ; 曹新亮 英文作者：Yang Rui;Huang Haisheng;Li Xin;Cao Xinliang;School of Electronic Engineering, Xi′an University of Posts and Telecommunications;School of Electronic Engineering , Xi′an University of Posts and Telecommunications;School of Physics and Electronic Information, Yan′an University; 关键词：反射信号 ; 导航数据 ; 相干积分 ; FFT ; 积分增益 英文关键词：reflected signals;;navigation data;;coherent noncoherent;;FFT;;integral gain 中文刊名：DZJY 英文刊名：Application of Electronic Technique 机构：西安邮电大学电子工程学院;延安大学物理学与电子信息学院; 出版日期：2018-08-06 出版单位：电子技术应用 年：2018 期：v.44;No.482 基金：国家自然科学基金项目(61661049);; 陕西省工业科技攻关项目(2016GY-138) 语种：中文; 页：DZJY201808030 页数：5 CN：08 ISSN：11-2305/TN 分类号：124-127+131

摘要

针对北斗反射信号捕获难度大问题,提出一种适用于北斗GNSS-R接收机中反射信号的捕获算法。该算法利用直射信号中的导航数据剥离掉反射信号中的导航数据,并通过周期累加运算和FFT相关,改进了传统的反射信号捕获算法。算法可以降低长时间相干积分的运算量,提高算法捕获速率。对新算法进行了MATLAB仿真,并与传统的捕获算法(相干非相干算法、差分相干算法)做了比较,仿真结果表明,该算法在捕获性能上明显优于传统的相干非相干与差分相干捕获算法。
        Aiming at the difficulty of Beidou reflected signal acquisition, this paper presents a capture algorithm for the reflected signal in the Beidou GNSS-R receiver. The algorithm uses the navigation data in the direct signal to peel off the navigation data in the reflected signal, and improves the traditional reflection signal acquisition algorithm through the cyclic accumulation operation and the FFT correlation. The algorithm can greatly reduce the computational complexity and shorten the capture time of long time integral of the reflected signal. In this paper, the MATLAB simulation of the new algorithm is carried out, and compared with the traditional coherent-uncoupling algorithm and the difference coherence algorithm. The simulation results show that the algorithm in this paper is superior to the traditional coherent noncoherent and differential coherent acquisition algorithm in capturing performance.

引文

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