ADC量化位数对阵列天线GNSS接收机的影响

在处理全球卫星导航系统（Global Navigation Satellite System,GNSS）卫星信号时，针对模数转换器（Analog-to-Digital Converter,ADC）量化位数不同导致输出的信号信噪比下降的问题，推导了阵列天线波束形成后输出信号的信噪比理论计算模型，分析了ADC量化位数对阵列天线抗干扰GNSS接收机的性能影响。在7阵元天线且ADC量化位数为10的条件下，理论模型分析和数据仿真结果表明最大抗干扰能力约为85 dB。通过确定ADC量化位数与抗干扰GNSS接收机抗干扰能力之间的关系，其结论为工程应用中抗干扰GNSS接收机的ADC选型和设计提供了理论依据。

Influence of ADC quantization on GNSS receiver with antenna array

In processing global navigation satellite system(GNSS) signal,the signal-to-noise ratio(SNR) is weakened because of the quantization error of analog-to-digital converter(ADC).A theoretical calculation model of SNR is deduced after beamforming processing,and the influence of ADC quantization bits on the performance of anti-jamming GNSS receiver with antenna array is analyzed.When the number of antenna array is 7 and the ADC quantization bits are equal to 10,the analysis results of theoretical model and data simulation show that the maximum anti-jamming capacity is about 85 dB.By determining the relationship between the ADC quantization bits and the anti-jamming capacity of anti-jamming GNSS receiver,this conclusion provides a theoretical basis for ADC selection and design of anti-jamming GNSS receiver in engineering application.