摘要
分析了线性调频Z变换(Chirp-Z Transform,CZT)在双频连续波雷达信号处理中的应用。说明了双频连续波雷达的测距精度与双频频差和输入信噪比成正比、测速精度与差拍信号频谱分辨率成正比的关系,讨论了CZT在双频连续波雷达中的应用,发现CZT使得双频连续波雷达的测速精度提高,但引起的信噪比损失会使得测距精度降低。仿真结果验证了分析的正确性。
The application of dual frequency continuous wave (CW) radar signal processing based on Chirp-Z Trans-form (CZT) is analyzed. Analyzing result shows that the ranging accuracy of the dual frequency CW radar is proportional to dual frequency difference and input signal-to-noise ratio(SNR), and velocity measurement accuracy is proportional to beat signal frequency resolution. Application of CZT can improve velocity measurement precision, but the ranging ac-curacy will reduce due to lower SNR. The simulation results verify the correctness of analysis.
出处
《火控雷达技术》
2014年第3期46-49,86,共5页
Fire Control Radar Technology
关键词
线性调频Z变换
双频连续波雷达
测速测距精度
Chirp-Z transform
dual frequency CW radar
accuracy of ranging and velocity