Posterior Cramér-Rao Bounds for Doppler Biased Distributed Tracking

摘要

This paper investigates distributed tracking with range-Doppler coupling, where a range measurement of a target of interest is lin- early biased by its range-rate (or Doppler). The coupling parame- ter . can be zero, positive, or negative. The posterior Cram′ er-Rao bound (PCRB) is derived for distributed radar systems: multistatic and multiple-input multiple-output (MIMO) settings. In the mul- tistatic case, a positive . leads to the lowest PCRB, the same as is true for monostatic tracking. The paper also compares the track- ing performance of multistatic and MIMO configurations, where the latter utilizes two waveforms with §. parameters, respectively. Regarding the power-unlimited case, a MIMO radar can always outperform a multistatic one from a tracking perspective. However, if the total power is limited, the situation is somewhat different: the transmitter co-located configuration is worse than a multistatic one, while in the widely-separated case the better choice depends on geometry.