摘要： 为了保证扩频信号具有更高的扩频增益、更强的抗模仿和抗欺骗能力，必须实现P码的直接捕获。序列捕获处理器利用本地码发生器产生本地伪码序列，利用本地伪码控制策略，通过对本地伪码的不断调整、偏移，实现对接收信号中P码信号直接、快速的相关捕获。在实验室环境下对序列捕获处理器进行测试，结果表明序列捕获处理器可以有效捕获GPS P码信号。

关键词: 卫星定位导航系统, 直接捕获, 循环相关, P码, IP核

Abstract: Direct P code acquisition is implemented in GPS receiver in order to achieve higher spread spectrum gain, the better anti-deception and anti-spoofing. The sequence acquisition processor is designed in order to realize the direct and fast acquisition of P code in GPS. The local signal processor is used to produce the local code, the local control is used and the local code is adjusted and shifted to actualize the direct and fast acquisition of P code. The sequence acquisition processor is tested in lab environment. The conclusion shows that the processor is effective.

Key words: GPS, direct acquisition, circle correlation, P code, IP core

中图分类号: 

• TN914.53