Multi-cycle signal processing based on Keystone transform in LFMCW radar

• Published in: 2010 2nd International Conference on Signal Processing Systems Vol. 1; pp. V1-280 - V1-284
• Main Authors: Lu Jianbin, Xi Zemin, Zhang MingMin, Xiao Hui
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-07-2010
• Subjects: ambiguity factor; Couplings; Doppler effect; Keystone transform; LFMCW radar; MTD; multi-cycle integration; Radar imaging; Signal to noise ratio; Transforms
• ISBN: 9781424468928; 1424468922
• DOI: 10.1109/ICSPS.2010.5555611

In this paper a Keystone transform based MTD processing is proposed for multi-cycle signals to solve the MTRC (migration through range cell) problem in linear frequency-modulated continuous wave (LFMCW) radar. Analysis shows that MTRC is introduced by the linear coupling of fast time and slow time in multi-cycle beat signals. Resorting to the decoupling principle of Keystone transform and under consideration of the characteristics of beat signals, a transform expression is given, which is independent of target parameters. The relation between this transform and the direct motion compensation is further discussed, and a general applicable condition is derived. Simulation results testify the conclusion and the efficiency of the method.