An FMCW and chirp pulse-doppler radar system for surveillance in X-band

Abstract

A narrow band radar system based on a field programmable gate array is proposed for dual-mode operation.Frequency-modulated continuous-wave (FMCW) radar mode is for short-range target detection and pulse-Doppler (PD) radar mode is for long-range target detection. Precomputed codes are used to generate linear frequency modulation signals in both FMCW and PD radar mode. The bandwidths of FMCW and PD radar modes are 10 and 1 MHz. Experiments have been carried out to confirm the system operation. In FMCW radar mode, nonlinear amplitude response can be corrected by precomputed code. In PD radar mode, the RX signals have been checked in the pulse width of 4 mu s with a compressed echo signal response. (C) 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:474479, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27343