EFFECTS OF GEOMETRY CONFIGURATIONS ON AMBIGUITY PROPERTIES FOR BISTATIC MIMO RADAR

Bistatic multiple-input multiple-output (MIMO) radar can improve the system performance for obtaining the waveform diversity and larger degrees of freedom (DoF), and efiectively counteract the stealthy target for its transmit antennas and receive antennas separated placement. Similarly with the conventional bistatic radar, the geometry conflgurations of bistatic MIMO radar also play an important role in radar system's performance. Aimed at considering these efiects of geometry conflgurations on the performance for bistatic MIMO radar, in this paper the extended ambiguity function is deflned as the coherent cumulation of the matching output of all channels, where the information of the system geometry conflguration is included in the received signal model. This new ambiguity function can be used to characterize the local and global resolution properties of the whole radar systems instead of only considering transmitted waveforms in Woodward's. In addition, some examples with the varying system conflgurations or target parameters are given to illustrate their efiects, where the spatial stepped-frequency signal set (a quasi-orthogonal waveform set) is used. The simulation results demonstrate that the more approaching monostatic MIMO radar case, the better ambiguity properties of time-delay and Doppler for bistatic MIMO radar.