Redundant filterbank precoders and equalizers Part I: unification and optimal designs

Anna Scaglione, Georgios B. Giannakis, Sergio Barbarossa

Research output: Contribution to journalArticlepeer-review

535 Scopus citations


Transmitter redundancy introduced using filterbank precoders generalizes existing modulations including OFDM, DMT, TDMA, and CDMA schemes encountered with single- and 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 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.

Original languageEnglish (US)
Pages (from-to)1988-2006
Number of pages19
JournalIEEE Transactions on Signal Processing
Issue number7
StatePublished - 1999


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