Redundant Filterbank Precoders and Equalizers: Unification and Optimal Designs+
نویسنده
چکیده
Transmitter redundancy introduced using filterbank precoders generalizes existing modulations including OFDM, DMT, TDMA, and CDMA schemes encountered with singleand multi-user communications. Sufficient conditions are derived to guarantee that, with FIR filterbank precoders, FIR channels are equalized perfectly in the absence of noise by FIR zero-forcing equalizer filterbanks, irrespective of the channel zero locations. Multicarrier transmissions through frequency-selective channels can thus be recovered even when deep fades are present. Jointly optimal transmitter-receiver filterbank designs are also developed based on maximum output SNR and minimum mean-square error criteria under zero-forcing and fixed transmitted power constraints. Analytical performance results are presented for the zero-forcing filterbanks and are compared with mean-square error and ideal designs using simulations.
منابع مشابه
Redundant Filterbank Precoders and Equalizers Part I: Unification and Optimal Designs
Transmitter redundancy introduced using filterbank precoders generalizes existing modulations including OFDM, DMT, TDMA, and CDMA schemes encountered with singleand multiuser communications. Sufficient conditions are derived to guarantee that with FIR filterbank precoders FIR channels are equalized perfectly in the absence of noise by FIR zero-forcing equalizer filterbanks, irrespective of the ...
متن کاملREDUNDANT FILTERBANK PRECODERS AND EQUALIZERS: UNIFICATION AND OPTIMAL DESIGNSt
Transmitter redundancy introduced using filterbank precoders generalizes existing modulations including OFDM, DMT, TDMA, and CDMA schemes encountered with singleand multi-user communications, Sufficient conditions are derived to guarantee that, with FIR filterbank precoders, FIR channels are equalized perfectly in the absence of noise by FIR zero-forcing equalizer filterbanks, irrespective of t...
متن کاملRedundant filterbank precoders and equalizers. II. Blind channel estimation, synchronization, and direct equalization
Transmitter redundancy introduced using finite impulse response (FIR) filterbank precoders offers a unifying framework for singleand multiuser transmissions. With minimal rate reduction, FIR filterbank transmitters with trailing zeros allow for perfect (in the absence of noise) equalization of FIR channels with FIR zero-forcing equalizer filterbanks, irrespective of the input color and the chan...
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تاریخ انتشار 2004