Conference Proceedings
Spectrally balanced OFDM precoders for communications over unknown multipath channels
JH Manton, K Abed-Meraim
6th International Symposium on Signal Processing and Its Applications Isspa 2001 Proceedings 6 Tutorials in Communications Image Processing and Signal Analysis | IEEE | Published : 2001
Abstract
The problem of transmitting a single block of data over an unknown multipath channel is considered. It is explained why the transmitted signal should look white if the channel parameters are unknown, and it is proved that this can be essentially achieved by using a zero padding precoder. A novel canonical representation for linear precoders is then used to decompose this zero padding precoder into a form better suited to multipath channels. Adding a cyclic prefix to this precoder results in what is called a «spectrally balanced OFDM precoder». © 2001 IEEE.