A. Scaglione et al., Filterbank transceivers optimizing information rate in block transmissionsover dispersive channels, IEEE INFO T, 45(3), 1999, pp. 1019-1032
Optimal finite impulse response (FIR) transmit and receive filterbanks are
derived for block-based data transmissions over frequency-selective additiv
e Gaussian noise (AGN) channels by maximizing mutual information subject to
a fixed transmit-power constraint. Both FIR and pole-zero channels are con
sidered, The inherent flexibility of the proposed transceivers is exploited
to derive, as special cases, zero-forcing (ZF) and minimum mean-square err
or receive filterbanks, The transmit filterbank converts transmission over
a frequency-selective fading channel, affected by additive colored noise, i
nto a set of independent flat fading subchannels with uncorrelated noise sa
mples. Two loading algorithms are also developed to distribute transmit pow
er and number of bib across the usable subchannels, while adhering to an up
per bound on the bit error rate (BER), Reduction of the signal-to-noise rat
io (SNR) margin required to satisfy the prescribed BER is achieved by codin
g each subchannel's bit stream. The potential of the proposed transceivers
is illustrated and compared to discrete multitone (DMT) with simulated exam
ples.