| 摘要: |
| 基于Dechirping理论，提出了一种能有效测量大时带积线性调频(LFM)脉冲信号在宽带数字
阵
列不同通道间相对时延的新方法。该方法利用了FFT算法，不仅系统所需器件简单易行，而
且测量精度与实时性较好，并能在一次测量过程中对多个通道进行同时测量。从理论角
度分析了这种测量方法的性能与特点，在此基础上确定出系统的各项参数，并提出了进一步
简化系统的方案。仿真实验结果验证了所提方法的有效性。 |
| 关键词: 相控阵雷达；宽带数字阵列 宽带LFM脉冲信号 相对时延测量；D
echirping技
术 |
| DOI： |
|
| 基金项目:国家自然科学基金重点资助项目（60736045） |
|
| A Novel Relative Delay Measurement Method for Wideband Digital Array Radar |
| PENG Wei,SHI Yong,YAN Bo,WU Hong-gang |
| (School of Electronic Engineering, University of Electronic Science and Techno
logy of China,Chengdu 610054, China;Southwest China Institute of Electronic Equipment,Chengdu 610043, China;The Second Research Institute,Civil Aviation Administration of China, Chengdu
610041, China) |
| Abstract: |
| Based on the dechirping theory, a new method is proposed for measuri
ng relative delays in channels of the wideband digital array utilizing wideband
LFM pulses. By using the FFT algorithm and some simple components, n
ot only can this measurement method be easier to be implemented for computationa
l efficiency, but also good measurement precision and realtime performance are
achieved. At the same time, all relative delays among channels are enabled to b
e acquired in a measurement process. The performances of the proposed method are
theoretically analysed and then some system parameters are determin
ed.Finally, a further simplified measurement system is presented. The simulat
ion results prove the effectiveness and efficiency of the proposed method. |
| Key words: phased array radar(PAR) wideband digital array wideband LFM pulse signal relativ
e delay measurement dechirping technique |
《电讯技术》编辑部 