Accurate arbitrary resampling with exact delay for radar applications

In this paper we consider the design of batch and streaming resamplers with arbitrary sample rate change, prescribed accuracy and known exact delay. We are primarily concerned with applying these resamplers in digital radar systems and the major contribution of this paper is to provide expressions for the exact delay through the resampler implementation. The batch resampler can be used to reduce post range- processed radar data to one sample per range cell irrespective of the original receiver sample rate. It permits unstructured joint receiver sample rate f_s and radar waveform bandwidth f_b selection; with the only requirement that the receiver sample rate achieve Nyquist´s sampling theorem criteria for the radar waveform. The streaming resampler can be used to enforce that there are an integer number of samples of the receiver sample rate for each waveform pulse repetition interval T_p. While streaming resampling is usually not required for radar systems with cooperative waveform generation, it can be essential for emitter-of-opportunity radar where the transmitted waveform sample rate may be unknown.