Fast Channel Shortening with Polynomial Weighting Functions

摘要

Channel shortening is often necessary for demodulationrnof multicarrier signals and complexity reduction of maximumrnlikelihood sequence estimation (MLSE). This paper hasrntwo parts: (ⅰ) the proposal of complexity-reduction techniques forrnchannel shortening designs with polynomial weighting functions,rnincluding the minimum inter-block interference (Min-IBI) andrnminimum delay spread (MDS) designs, and (ⅱ) the evaluationrnof several standard channel shorteners, including Min-IBI andrnMDS, in terms of bit error rate (BER) for an OFDM system.rnPrevious evaluation of channel shortening designs has focused onrnthe wireline case, for which the performance metric (bit rate forrnfixed BER) is quite different.