Range Doppler correlation for time-orthogonal distributed aperture radars

Distributed aperture radars represent an interesting solution for target detection in environments affected by clutter. Due to the large distances between array elements, both target and interfering sources are in the near field of the antenna array. Recent works have demonstrated the benefits of combining frequency diversity and space time adaptive processing for distributed aperture radars. Using orthogonal signaling the receivers can treat the incoming signals independently, solving several bistatic problems instead of the initial multistatic problem. However, a well known problem in bistatic radar is the dependency of the clutter Doppler center on range. We analyze the benefits of joint use of waveform diversity and adaptive techniques to counteract the non-stationarity of the clutter Doppler. (5 pages)