Doppler Frequency Extraction by Curve Detection in Time-Frequency Map  

作　　者：HOU Shujuan MA Shufen WU Siliang 

机构地区：[1]Department of Electronic Engineering, Beijing Institute of Technology, Beijing 100081, China

出　　处：《Chinese Journal of Electronics》2005年第4期727-730,共4页电子学报（英文版）

摘　　要：This paper proposes a novel method of Doppler frequency extraction for Doppler radar scoring systems. For the time-frequency map of radar echo signal can show how the missile＇s Doppler frequency varies along the time-line, the Doppler frequency extraction becomes curve detection in the image-vlew. Then a curve detection scheme based on Randomized Hough transform （RHT） is applied to the binary version of the time-frequency map for Doppler frequency extraction. The experimental results show that the proposed method is effective and can overcome the shortcomings of piecewise processing.

关 键 词：Doppler frequency extraction Time-frequency analysis Short time fourier transform （STFT） Curve detection Randomized hough transform （RHT） 

分 类 号：TN95[电子电信—信号与信息处理]