摘要
针对干扰条件下无自动增益控制(AGC)电路的卫星导航接收机射频前端的设计,在给定A/D采样芯片和混频器的条件下,根据抗干扰需求,提出了线性度指标的优化设计方法,得出了各级电路的增益、1dB压缩点、三阶交调截点和噪声系数的求解方法,以此指导器件选型。根据此优化设计方法,设计了某卫星导航系统的一种接收机射频前端,达到预期抗干扰效果,证明此方法有效可行。
For the design of the RF front-end without AGC circuit of GNSS receivers with the existence of jamming,when the A/D sampling chip and mixer are fixed,an optimal design method of the linearity is proposed in this paper.And a method to compute the gain,power 1dB compression point,third-order intercept and noise figure of each class of circuits is proposed for the requirement of anti-jamming,which can be guidance for components selection.Based on this optimal design method,a RF front-end of a GNSS receiver is designed,which achieves the expected effect and demonstrates the effectiveness of the method.
出处
《压电与声光》
CSCD
北大核心
2017年第4期577-581,共5页
Piezoelectrics & Acoustooptics
基金
青年科学基金资助项目(61403413)
