A Computation Efficiency AND-CFAR for FMCW Radar Receiver

Abstract

The paper proposes a computation efficient constant false alarm rate (CFAR) algorithm, AND-CFAR, for frequency modulated continuous-wave (FMCW) radar receiver. The criterion of AND-CFAR algorithm adopts criteria combing Cell-Averaging (CA) and Order Statistics (OS) CFAR algorithms with 'AND' operation, and the frequency estimation is thus improved. While considering application in embedded systems, it is necessary to lower computation complexity of AND-CFAR algorithm. Therefore, a computation efficiency AND-CFAR algorithm is proposed to reduce the computation effort in CA and OS CFAR algorithms. Base band processing of FMCW receiver, which is composed of a band pass filter (BPF), a FFT and a AND-CFAR, is simulated to show the validity of the algorithm proposed. And, then, the base band FMCW receiver is implemented in two DSP chips to show the saving in execution periods with AND-CFAR algorithm proposed.