Sparse approximation based resource allocation in DSL/DMT transceivers with per-tone equalization
Sparse approximation techniques has been shown to perform better than the previously reported variable order filter techniques. The performance can be further improved by performing the transmit power loading alongside the sparse filter computation. Both filter tap allocation and the transmit power loading can be represented as optimization problem and can be efficiently solved. The number of non-zero filter taps can be significantly reduced by using this method without significant performance loss.
sparse approximation resource allocation dsl dmt multicarrier communication pteq