Research of a Method of Direct Acquisition Based on P Code in Frequency Domain

TIAN Ming-hao; FENG Yong-xin; PAN Cheng-sheng

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Research of a Method of Direct Acquisition Based on P Code in Frequency Domain

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- Research of a Method of Direct Acquisition Based on P Code in Frequency Domain
- Acta Electronica Sinica Vol. 35, Issue 3, Pages: 549-552(2007)
- 作者机构：
  
  1. 南京理工大学自动化系,江苏,南京,210094
  2. 沈阳理工大学通信与网络工程中心,辽宁,沈阳,110168
  3. 南京理工大学自动化系江苏南京,210094
  4. 沈阳理工大学通信与网络工程中心辽宁沈阳,110168
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN96
- Published：2007
- 稿件说明：
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TIAN Ming-hao, FENG Yong-xin, PAN Cheng-sheng. Research of a Method of Direct Acquisition Based on P Code in Frequency Domain[J]. Acta Electronica Sinica, 2007, 35(3): 549-552.
DOI：

TIAN Ming-hao, FENG Yong-xin, PAN Cheng-sheng. Research of a Method of Direct Acquisition Based on P Code in Frequency Domain[J]. Acta Electronica Sinica, 2007, 35(3): 549-552. DOI：

摘要

GPS(Global Positioning System)系统采用典型的CDMA(Code Division Mutiple Access)体制

目前扩频PRN码主要是用于标准定位服务的C/A码和用于精确定位服务的P码.P码信号具有很强的抗干扰和保密能力

而P码的捕获通常是利用C/A码来完成的

因此

实现P码的直接捕获对我国未来发展自己的卫星定位系统具有重要意义.本文从研究信号直接捕获算法角度出发

提出了一种新的P码快速直接捕获算法

并通过仿真实验验证了算法的有效性.仿真结果表明

该算法有效地提高了捕获效率.

Abstract

As the typical CDMA application

the spread spectrum PRN codes in GPS are C/A code applied to standard positioning service and P code applied to precise positioning service presently.P code has a higher tolerance to jamming and spoofing compared with the C/A code

but P code is usually acquired depending on C/A code

so P code direct acquisition should be implemented which is meaningful for the development of our own satellite positioning system in the future.A new P code direct acquisition algorithm is proposed by studying signal direction acquisition algorithms and its validity is shown by a simulation experiment.The Results show that the new algorithm improves the acquisition efficiency.

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