电子设计工程
電子設計工程
전자설계공정
ELECTRONIC DESIGN ENGINEERING
2015年
16期
71-74
,共4页
线性调频信号%去斜处理方法%多相滤波%MATLAB
線性調頻信號%去斜處理方法%多相濾波%MATLAB
선성조빈신호%거사처리방법%다상려파%MATLAB
LFM%dechirp processing%polyphase filter%MATLAB
宽带信号被广泛应用于雷达、导航和卫星通讯系统等。而线性调频信号(LFM)由于其容易产生跟处理,并且具有大时宽带宽积,而备受关注。文中用去斜脉冲压缩处理方法处理线性调频信号。并且提出了具体的改进方法,利用多相滤波的方法,降低了数据率,解决了高速率模数转换(ADC)与和数字信号处理器件之间的速度不匹配的矛盾。本文通过MATLAB仿真实现了对中心频率在1200 MHz、带宽为1000 MHz、脉冲宽度为40μs的线性调频信号进行去斜处理,在大幅度降低数据率的情况下,实验结果良好,具有可行性和实用性。
寬帶信號被廣汎應用于雷達、導航和衛星通訊繫統等。而線性調頻信號(LFM)由于其容易產生跟處理,併且具有大時寬帶寬積,而備受關註。文中用去斜脈遲壓縮處理方法處理線性調頻信號。併且提齣瞭具體的改進方法,利用多相濾波的方法,降低瞭數據率,解決瞭高速率模數轉換(ADC)與和數字信號處理器件之間的速度不匹配的矛盾。本文通過MATLAB倣真實現瞭對中心頻率在1200 MHz、帶寬為1000 MHz、脈遲寬度為40μs的線性調頻信號進行去斜處理,在大幅度降低數據率的情況下,實驗結果良好,具有可行性和實用性。
관대신호피엄범응용우뢰체、도항화위성통신계통등。이선성조빈신호(LFM)유우기용역산생근처리,병차구유대시관대관적,이비수관주。문중용거사맥충압축처리방법처리선성조빈신호。병차제출료구체적개진방법,이용다상려파적방법,강저료수거솔,해결료고속솔모수전환(ADC)여화수자신호처리기건지간적속도불필배적모순。본문통과MATLAB방진실현료대중심빈솔재1200 MHz、대관위1000 MHz、맥충관도위40μs적선성조빈신호진행거사처리,재대폭도강저수거솔적정황하,실험결과량호,구유가행성화실용성。
Wideband signals are widely used in radar,navigation,satellite communications and so on.Due to its easy to produce and process,and its large time-bandwidth product,the linear frequency modulated(LFM) signal has attracted more and more attention.In this paper,dechirp pulse compression processing technique is presented.The improved measures are developed.A method based on polyphase filtering is put forward to effectively reduce the data rate and the data processing speed, solving the problem of the mismatch between sampling rate and low processing speed.The design is simulated in MATLAB, and the results show that the linear frequency modulated signal with 1 200 GHz center frequency , 1 000 MHz bandwidth and 40 μs pulse width after dechirp processing achieves the desired results. The new scheme is feasible and practical.