抗干扰型卫星导航接收机的最优前端增益

doi:10.12305/j.issn.1001-506X.2022.07.23

摘要/Abstract

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。

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

Abstract:

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.

Key words: global navigation satellite system (GNSS) receiver, anti-jamming, low noise amplifier, front-end gain, carrier-to-noise ratio loss, quantization error

中图分类号:

TN95

鲁祖坤, 郭海玉, 宋捷, 孙一凡, 李柏渝. 抗干扰型卫星导航接收机的最优前端增益[J]. 系统工程与电子技术, 2022, 44(7): 2270-2275.

Zukun LU, Haiyu GUO, Jie SONG, Yifan SUN, Baiyu LI. Optimal front-end gain of anti-jamming satellite navigation receiver[J]. Systems Engineering and Electronics, 2022, 44(7): 2270-2275.

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参数类型	参数设置
量化位宽/bit	10
放大器范围/dB	0~60
信号码速率/MHz	10.23
采样率/MHz	25

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