The effect of in-phase and quadrature channel errors on digital quadrature demodulation is analyzed and an optimal digital filter design method is selected. 通过分析同相、正交通道误差对正交解调性能的影响,确定了滤波器最佳设计准则。
The analog quadrature demodulation is adopted in the sampling receiver of the experiment system, so A/ D sampling requirement is reduced and moreover, the received signal can be restored from the in-phase and quadrature channel signatures. 实验系统接收机采用模拟正交解调采样接收方案,降低了宽带系统对A/D采样率的要求,还不损失接收信号的幅相信息,完全能够从正交两路采集信号中恢复出接收信号。