Nyquist filters with robust performance against timing jitter

In this correspondence, se propose a novel technique for designing finite i mpulse response (FIR) equiripple Nyquist filters with almost no intersymbol interference (ISI), good robustness to timing jitter, and satisfactory sto pband performance. The main step in this technique is the design of an auxi liary Nyquist filter, which has good robustness to timing jitter, using a n ovel windowing method. The transition band of the equiripple filter is then shaped according to that of this auxiliary filter. The resulting filter ta kes advantage of the minimal principle for obtaining satisfactory stopband performance and the windowing method for obtaining good robustness to timin g jitter. Notable features of the proposed technique are simplicity and fle xibility, Examples show superior performance compared with the truncated ra ised cosine pulse as well as other existing techniques.