A novel approach to shared-spectrum multistatic radar

In recent years the electromagnetic spectrum has become increasingly crowded due to the demand for higher bandwidths by both the radar and communications communities. One proposed solution to this issue is shared-spectrum multistatic radar, analogous to code-division multiple access (CDMA) communications. The recently proposed multistatic adaptive pulse compression (MAPC) algorithm has been shown to successfully suppress both range sidelobes and interference from multiple radars operating in the same spectrum, thus enabling shared-spectrum multistatic radar. In this paper, we present a method to increase the overall information capacity of the MAPC algorithm by performing joint adaptive pulse compression in conjunction with adaptive beamforming. The addition of an adaptive beamforming stage to the MAPC algorithm enables further mutual interference suppression and therefore better estimation performance such that the number of multistatic radars simultaneously operating in the same spectrum may be increased for the same mean-square estimation error. Analysis of the performance of the adaptive beamforming MAPC algorithm in the presence of Doppler mismatch is presented.