Joint polarisation and frequency diversity for deceptive jamming suppression in MIMO radar

The joint exploitation of polarisation and frequency diversity is considered here as a way to improve the deceptive jamming suppression capability in multiple-input multiple-output (MIMO) radar. The authors explore a special polarisation and frequency diverse MIMO (PFD-MIMO) radar system here. In the PFD-MIMO radar system, polarisation and frequency diversity are employed in the transmit array, and two-dimensional vector sensors are adopted in the receive array to measure the horizontal and vertical components of the received signals. To fully explore the potential of the PFD-MIMO radar system, the transmitting polarisation and frequency increment are both optimised by maximising the output signal-to-interference-plus-noise ratio. The simulation results demonstrate that the PFD-MIMO radar is more robust and exhibits a better performance for deceptive jamming suppression than the frequency diverse array MIMO radar and polarimetric MIMO radar. Moreover, improved deceptive jamming suppression performance is achieved when the transmitting polarisation and frequency increment are both optimised.