Inventors:
John W. McKown - Dallas TX
Russell C. McKown - Dallas TX
Thomas W. Summers - Richardson TX
Assignee:
E-Systems, Inc. - Dallas TX
International Classification:
G06F 1531
Abstract:
An adaptive matched filter is described as a replacement for a signal replica filter of a maximum likelihood (ML) demodulator, the filter normally receiving an input data vector having signal and noise components. A symbol-justified input data vector is produced from the input data vector. This vector is then used to generate a weight vector. In a time-domain embodiment, the symbol-justified data vector is multiplied by the weight vector on a symbol-by-symbol basis to estimate the signal components of the output of a filter. In a frequency-domain implementation, multiplication is carried out on a symbol block-by-symbol block basis.
