低位量化对数字化多频连续波雷达测距性能的影响  

The Effect of Quantification Noise to Performance of Multiple Frequency CW Ranging Radar

作　　者：袁俊泉[1] 程翥[2] 曹鹏举[1] 

机构地区：[1]空军雷达学院信息与指挥自动化系,武汉430019 [2]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子信息对抗技术》2007年第3期31-35,共5页Electronic Information Warfare Technology

摘　　要：对基于FFT数字比相技术的多频连续波雷达,量化特别是低位量化必然对雷达的测距精度具有一定的影响。首先给出了极小化量化处理的实现方法,然后比较了极小化量化与均匀量化在同等条件下的量化噪声的方差及信噪比损失,推导出考虑量化噪声时多频连续波雷达测距误差均方根的计算公式,最后通过仿真结果验证了低位量化噪声对测距精度的影响,尤其是1位或2位量化对测距精度的影响。Low bit quantification affects ranging precision of multiple frequency CW radar based on digital phase comparison. First the implement method of minimization quantification is presented. Then the variance of quantification noise and SNR loss are compared between minimization quantification and uniform quantification for the same conditions. The formula of ranging MSE root thinking of quantification noise for multiple frequencies CW radar is concluded. Finally simulation results verify the effect of low bit quantification noise to ranging precision, especially for 1-bit or 2-bit quantification.

关 键 词：双频测距 低位量化 量化噪声 信噪比 

分 类 号：TN958.94[电子电信—信号与信息处理]