GNSS接收机射频前端电路相位噪声评估方法

doi:10.3969/j.issn.1001-506X.2020.03.005

Abstract

Abstract:

Phase noise is an important factor affecting the performance of global navigation satellite system (GNSS) receivers. In the high-performance receiver design, the phase noise evaluation of RF front-end circuits can not be ignored. The traditional methods mainly use professional instruments such as spectrum analyzers, which cannot analyze the phase noise of the RF front-end circuit of GNSS receivers which including the analog-digital (AD) converter. In this paper, the performance characteristics of the phase noise and the thermal noise of the receiver signals in the complex domain are analyzed. A method for evaluating the phase noise of the RF front-end of GNSS receiver in the signal complex system was proposed. The method is verified by simulation and test on receiver hardware platform. Based on the different effects of phase noise on the real part and imaginary part of the signal, the digital intermediate frequency data of the collected signal are processed by coherent integration, and the phase noise of the receiver RF system is quantitatively calculated. The results show the method has high evaluation accuracy and can be used to measure and evaluate the design quality of GNSS receiver radio frequency (RF) front-end circuits (including AD converters), to predict the receiver performance.

Key words: GNSS receiver performance evaluation, RF front-end, phase noise, complex plane

CLC Number:

TN98

Dangfei PAN, Wenxue LIU, Jian GE, Hong YUAN, Chao YUAN. Phase noise estimation method for RF front-end circuit of GNSS receiver[J]. Systems Engineering and Electronics, 2020, 42(3): 536-543.

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References 26

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组号	项目
组号	频谱仪测量值/dBc	评估结果/dBc	差值/dBc
1	-53.821	-54.629 5	0.808 5
2	-50.552	-51.194 9	0.642 9
3	-54.541	-54.016 4	-0.524 6
4	-50.636	-51.228 9	0.592 9

组号	项目
组号	频谱仪测量值	评估结果	相对差异/%
1	4.15e-6	3.44e-6	17.1
2	8.81e-6	7.59e-6	13.8
3	3.51e-6	3.97e-6	-13.1
4	8.64e-6	7.54e-6	12.7

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Phase noise estimation method for RF front-end circuit of GNSS receiver

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