基于伪码互相关特性的GPS信号捕获算法  

GPS signal acquisition algorithm based on PN code cross-correlation properties

作　　者：解楠[1] 张富堂[1] 

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900

出　　处：《信息与电子工程》2012年第3期247-251,265,共6页information and electronic engineering

摘　　要：高动态GPS接收机研究的核心是信号的捕获与跟踪算法,在接收机硬件实现时,系统性能与资源消耗直接受捕获算法的影响。结合时域滑动相关法和基于FFT的频域捕获算法各自的优点,提出一种基于伪码互相关特性的快速捕获算法,在不影响系统性能的前提下,既加快了捕获速度,又降低了资源消耗,实现了捕获速度和资源消耗二者的平衡。Acquisition and tracking are the key technologies of high dynamic GPS receiver. 3ystem performance and resources requirement are affected directly by the acquisition algorithm when GPS receiver is implemented in hardware. A novel GPS signal acquisition algorithm based on Pseudo-Noise（PN） code cross-correlation,properties is proposed, which combines the advantages of serial correlation method in the time domain and FFT method in the frequency domain. It not only improves the acquisition speed but also reduces the hardware consumption while maintaining the system performance, therefore it realizes a good compromise between acquisition time and resources consumption.

关 键 词：GPS接收机 互相关 捕获 伪码 

分 类 号：TN967.1[电子电信—信号与信息处理]