Iterative Synthesis of Optimized Surface Acoustic Wave Chirp Waveform Conpression Filter Impulse Response

Abstract

AS is well known, direct application of weighting functions to chirp matched filters to affect sidelobe suppression yields inferior results as signal time-bandwidth product (TBP) decreases. A standard frequency domain alternative produces infinitely long impulse responses (Paley-Wiener condition). Truncation to yield feasible SAW device designs, introduces "gating sidelobes", especially severe for low TBP. This paper describes an approach for improved finite length juxtaposition of iterative algorithms which develop solutions with concomitant significant improvement. Among the solutions are those with desirable quasi-uniform sidelobe structure and significant suppression, approaching that associated with the window template, with virtually no degradation in the other parameters when compared with the standard methods. impulse response construction by