Pulse compression for binary codes using spectrum inverse filters and their properties

Abstract

Mismatched processing of codes with multi-range resolution is revisited. The inverse of a binary code's spectrum is used as the transfer function of the mismatched filter. We calculate the mismatch losses for all combinations of binary codes in the range of code length L≤25 and find codes with very small mismatch loss compared with those of the conventional codes. The Doppler characteristics for various output pulse widths and relations between band-limitation of a receiver and SIF output waveforms are clarified by simulations. We also discuss how a desired signal waveform depends on mismatch loss.