GPS信号抗干扰性能分析  

Analysis of GPS Signal Anti-interference Performance

作　　者：王垚 郝然[2] 李隽[2] 蔚保国 

机构地区：[1]哈尔滨工程大学,黑龙江哈尔滨150001 [2]中国电子科技集团公司第五十四研究所,河北石家庄050081 [3]河北省卫星导航技术与装备工程技术研究中心,河北石家庄050081

出　　处：《无线电工程》2008年第8期35-37,40,共4页Radio Engineering

基　　金：国家导航基金项目资助(9140A24050106D64)

摘　　要：由于GPS信号发射功率有限,常常淹没在噪声中,研究信号的抗干扰性能尤为重要。分别从捕获和码跟踪的角度,讨论了GPS信号抗干扰性能差异。由于各种不同调制方式的GPS信号的功率谱分布不同,则其抗干扰能力也不尽相同。针对不同的信号调制方式,仿真分析了窄带干扰和带限白噪声干扰对捕获的影响及窄带干扰对码跟踪精度的影响,综合这2个方面得出BOC调制是一种更优的调制方式。It is very important to study anti-jamming performance of GPS signals, for the signals with limited transmit power are usually submerged in noise. This paper discusses the anti-interference performance difference for GPS signals in two aspects of acquisition and code tracking accuracy. GPS signals with different modulation have different power spectrums, so their anti-jamming capabilities are not the same. The effect of narrow-band interference and band-limited white noise interference on acquisition is simulated, the same analysis are carried out concerning the effect of narrow-band interference on code tracking. All the results show that BOC modulation is an optimal mode.

关 键 词：卫星导航 BOC调制 抗干扰性能 码跟踪误差 

分 类 号：P228.4[天文地球—大地测量学与测量工程]