Theory and design of optimum FIR compaction filters
A. Kirac, Palghat P. Vaidyanathan · IEEE Transactions on Signal Processing · 1998
The problem of optimum FIR energy compaction filter design for a given number of channels M and a filter order N is considered. The special cases where N<M and N=/spl infin/ have analytical solutions that involve eigenvector decomposition of the autocorrelation matrix and the power spectrum matrix, respectively. We deal with the more difficult case of M<N