一种改善NLFM信号多普勒性能问题的研究方法
Research on Doppler Performance Improvement of NLFM Signals
马兰 1张苡宁 1井伟 1周永伟1
作者信息
- 1. 西安电子工程研究所 西安 710100
- 折叠
摘要
由于NLFM信号脉压时无需进行加权滤波就能获得较低的旁瓣电平,近年来广泛受到关注.同时,NLFM信号的多普勒性能较差,且随着发射信号时宽的增大,多普勒敏感性加剧.本文利用谱修正滤波器对NLFM信号的多普勒性能进行改善,降低了多普勒频移下NLFM信号的旁瓣电平,并通过对正负调频函数下的脉压结果峰值时间求均值,解决了脉压波形峰值的时延问题.
Abstract
NLFM signals have attracted widespread attention in recent years because they can obtain low side-lobe levels without weighted filtering during pulse compression.However,the NLFM signals have poor Doppler perform-ance,and their Doppler sensitivity increases as the duration of the transmitting signal increases.The spectrum cor-rection filter was used to improve the Doppler performance of the NLFM signals,reducing the sidelobe level of the NLFM signals in the presence of Doppler frequency shifts.In addition,the delay of the pulse compression waveform peaks was eliminated by calculating the mean peak time of the pulse compression waveforms of matching positive and negative frequency modulation signals.
关键词
NLFM信号/多普勒性能/谱修正/峰值时延/正负调频Key words
NLFM signal/Doppler performance/spectrum correction/peak delay/positive and negative frequency modulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据