Joint transceiver optimization has received considerabIe attentionvery recently. Optimal FIR transmit filterbank precoders and nonlineardecision feedback receivers are derived for block-based transmissionsover frequency-selective AWGN channels. The joint optimization ofprecoders and equalizers is based on the maximum mutual informationcriteria subject to fixed transmission power constraint. By adding oneFIR feedback filter after the filterbank linear equalizers, we get a newresult from which the precoder can also be interpreted as converting thefrequency fading channel into a set of independent flat fadingsubchannels, and there is a direct path in each subchannel because ofthe feedback filter, thus the SNR of each subchannel and the maximuminformation rate are increased and the system has better overall BERperformance while maintaining all the advantages of that in Scaglione etal., (1999). Simulation illustrates the merits of our design
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