| 一种GPS系统P码直接捕获策略分析 |
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| 作者姓名： | 连全斌 张乃通 张中兆 |
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| 作者单位： | 哈尔滨工业大学通信技术研究所 哈尔滨150001
(连全斌，张乃通)，哈尔滨工业大学通信技术研究所 哈尔滨150001(张中兆) |
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| 基金项目： | 86 3计划资助项目.项目编号 86 3- 3- 5 - 2 .1 |
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| 摘 要： | GPS的 P码信号具有很强的抗干扰和保密能力 ,实现 P码的直接捕获对 GPS系统的军事用户及我国未来发展自己的卫星定位系统具有重要意义。针对 GPS系统 P码信号多普勒频移大、码周期长和速率高的特点 ,提出了时域 -频域联合、串行 -并行混合的捕获策略 ,介绍时域 -频域联合捕获和串行 -并行混合捕获方法的基本原理和工作方式 ,在此基础上对两方案的捕获性能进行了分析。
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| 关 键 词： | GPS系统 卫星定位 二维搜索 混合捕获 |
Strategy for GPS P-Code Direct Acquisition |
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| Authors: | Lian Quanbin Zhang Naitong Zhang Zhongzhao |
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| Institution: | Lian Quanbin Zhang Naitong Zhang Zhongzhao |
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| Abstract: | As GPS P code has a higher tolerance to jamming and spoofing compared with the C/A code,it's direct acquisition is desirable to GPS's military users.This is also meaningful for the development of our own satellite positioning system in the future.GPS P code signal has large doppler frequency shift,long code period and high code rate.According to these characters,this paper puts forward a time frequency fields joint and serial parallel hybrid acquisition strategy.Firstly,the paper introduces the principles of this strategy and how it works,then it makes a deep analysis on the performances of this strategy. |
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| Keywords: | GPS Satellite positioning Two dimensional search Hybrid acquisition |
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