A Novel Method for Joint Parameter Estimation of LFM Signals in Bistatic MIMO Radar System Based on FRFT

This paper presents a novel method for joint parameter estimation of Linear Frequency Modulation (LFM) signals in bistatic Multiple-Input Multiple-Output (MIMO) radar system. A new signal array model of bistatic MIMO radar system is constructed in this paper. Firstly, each LFM signal is extracted according to the characteristic energy concentration in FRactional Fourier Transform (FRFT) domain. Secondly, the Doppler frequency shift scale and time delay are estimated by searching peak point in the FRFT domain. Furthermore, both Direction Of Departures (DODs) and Direction Of Arrivals (DOAs) of the multiple targets are estimated and paired automatically by employing the FRFT-MUSIC algorithm. Simulation results are presented to verify the effectiveness of the proposed method.