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.
出处
《电子信息对抗技术》
2007年第3期31-35,共5页
Electronic Information Warfare Technology
关键词
双频测距
低位量化
量化噪声
信噪比
dual frequency ranging
low bit quantification
quantification noise
SNR
