A. Stamoulis et al., Block FIR decision-feedback equalizers for filterbank precoded transmissions with blind channel estimation capabilities, IEEE COMMUN, 49(1), 2001, pp. 69-83
In block transmission systems, transmitter-induced redundancy using finite-
impulse response (FIR) filterbanks can be used to suppress intersymbol inte
rference and equalize FIR channels irrespective of channel zeros. At the re
ceiver end, linear or decision-feedback (DF) FIR filterbanks can be applied
to recover the transmitted data. Closed-form expressions are derived for t
he FIR linear or DF filterbank receivers cor;responding to varying amounts
of transmission redundancy. Our framework encompasses existing block transm
ission schemes and offers low implementation-cost equalization techniques b
oth when interblock interference is eliminated and when IBI is present as,
e.g., in orthogonal frequency-division multiplexing with insufficient cycli
c prefix. By applying blind channel estimation methods, our filterbank tran
smitters-receivers (transceivers) dispense with bandwidth consuming trainin
g sequences. Extensive simulations illustrate the merits of our designs.