抗干扰型卫星导航接收机的最优前端增益  

Optimal front-end gain of anti-jamming satellite navigation receiver

作　　者：鲁祖坤 郭海玉 宋捷 孙一凡 李柏渝[1] LU Zukun;GUO Haiyu;SONG Jie;SUN Yifan;LI Baiyu(College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073

出　　处：《系统工程与电子技术》2022年第7期2270-2275,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(62003354)资助课题。

摘　　要：基于全球导航卫星系统(global navigation satellite system,GNSS)接收机射频前端增益大小引起的抗干扰能力与模数转换器(analog to digital converter,ADC)量化损耗之间的矛盾问题,提出一种抗干扰性能约束下的最优前端增益设计方法。首先,建立射频通道、ADC的数学模型。然后,分析在无干扰情况下前端增益对信号采样的影响、干扰条件下的抗干扰极限性能。最后,针对前端增益对信号接收与抗干扰性能之间的矛盾,以抗干扰性能为优化目标提出了最优的前端增益设计方法。仿真实测结果验证了本文分析结论的准确性和提出方法的有效性。Based on the contradiction between the anti-interference ability caused by the radio frequency(RF)front-end gain of global navigation satellite system(GNSS)receiver and the quantization loss of analog-to-digital converter(ADC),an optimal front-end gain design method under the constraint of anti-interference performance is proposed.Firstly,the mathematical models of RF channel and ADC are established.Then,the influence of front-end gain on signal sampling without interference and the anti-interference limit performance under interference are analyzed.Finally,aiming at the contradiction between the front-end gain on signal reception and anti-interference performance,taking the anti-interference performance as the optimization goal,an optimal front-end gain design method is proposed.The simulation results verify the accuracy of the analysis conclusions and the effectiveness of the proposed method.

关 键 词：全球导航卫星系统接收机 抗干扰 低噪放 前端增益 载噪比损耗 量化误差 

分 类 号：TN95[电子电信—信号与信息处理]