| CORDIC算法实现GPS信号捕获研究 |
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| 引用本文： | 黄鹏达,皮亦鸣.CORDIC算法实现GPS信号捕获研究[J].全球定位系统,2009,34(4):9-13. |
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| 作者姓名： | 黄鹏达 皮亦鸣 |
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| 作者单位： | 电子科技大学电子工程学院701-4实验室,四川成都611731 |
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| 摘 要： | 在GPS接收机中，对GPS信号的捕获是最为关键的第一步。对GPS信号中伪码的初始相位和信号载频的估计是捕获的两个基本任务。在某些特定的环境下，比如室内、城市街道、树林，对信号的捕获变得困难。针对这个困难可以通过提高估计精度以减少估计误差带来的相关损失。但是信号累积和估计精度的提高都需要极大地增加运算量。本文提出了将CORDIC算法引入到GPS接收机，在保证大运算量的情况下，实现快速的计算时间。介绍了GPS信号捕获的基本原理，讨论了使用CORDIC算法的必要性以及实现方法。最后通过仿真验证了CORDIC算法能够有效提高GPS接收机的捕获速度。
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| 关 键 词： | GPS信号捕获 CORDIC算法 高分辨率 |
Research on GPS Signal Acquisition Based on CORDIC Algorithm |
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| HUANG Peng-da,PI Yi-ming.Research on GPS Signal Acquisition Based on CORDIC Algorithm[J].Gnss World of China,2009,34(4):9-13. |
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| Authors: | HUANG Peng-da PI Yi-ming |
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| Institution: | HUANG Peng-da,PI Yi-ming (701-4 Laboratory,Electronic Engineering School,University of Electronic Science and Technology,Chengdu 611731,China) |
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| Abstract: | GPS signal acquisition is the first step in baseband signal processing of GPS receiver.To estimate initial phase of pseudo code and carrier frequency are two basic and important tasks.In some special environment,indoor,urban street and woods,the task becomes challenging.High frequency estimation accuracy is effective in solving this problem by decreasing frequency error loss which high accuracy trades off huge computation burden.In this paper CORDIC algorithm is employed in software based GPS receiver which... |
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| Keywords: | GPS signal acquisition CORDIC algorithm high solution |
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