Improved MIMO radar channel estimation using spatial coding

A spatial coding of the transmitted waveforms in a distributed MIMO radar system is proposed for reducing the impact of noise and interference on the channel matrix estimate. The channel matrix is needed in target parameter estimation as well as transmitter resource allocation and target recognition, for example. It is shown that when noise or interference are correlated after filtering at the receiver, it is possible decrease the error of the channel coefficient estimates by using the proposed coding method. Numerical results shown here demonstrate the benefits of the method in practical scenarios.