Patent ID: 7302023
Filing Date: 2007-11-27
Classification: H04B,H04L

Abstract:
1. A receiver subsystem in a multi-channel communication system deployed in a fading environment, said receiver subsystem receiving a multipath fading signal for combining a plurality of significant multipath signals to produce a combined signal and for reducing a plurality of interferences from said combined signal to generate an equalized signal, wherein said plurality of interferences comprise a plurality of pre-cursor interferences and a plurality of post-cursor interferences, wherein said multi-channel communication system has a plurality of communication sub-channels with each sub-channel transmitting a plurality of corresponding data bits, said receiver subsystem comprising: a signal register consisting of a plurality of shift registers, coupled to receive said multipath fading signal, for capturing a moving section of said multipath fading signal and for providing a plurality of tapped output signals with each tapped output signal taken from a corresponding shift register of said plurality of shift registers; a multipath detection device, coupled to said signal register, for detecting said plurality of significant multipath signals; a multipath combiner, coupled to said signal register to receive said plurality of tapped output signals, for combining said plurality of significant multipath signals together to generate said combined signal; a first transversal filter, coupled to said multipath combiner to receive said combined signal, for removing said plurality of pre-cursor interferences from said combined signal; a second transversal filter, for estimating said plurality of post-cursor interferences on said combined signal; a summation circuit, coupled to said first transversal filter and said second transversal filter, for generating said equalized signal with said plurality of pre-cursor interference and said plurality of post-cursor interferences decreased; a multi-channel detection circuit, coupled to said summation circuit to receive said equalized signal, for demodulating each corresponding communication sub-channel to produce said plurality of corresponding data-bits; a multi-channel signal regeneration device, coupled to said multi-channel detection circuit, for regenerating an estimated transmission signal; and a controller, coupled to said multipath detection device, for generating a multipath fading profile about said multipath fading signal, updating said multipath fading profile, and producing a plurality of control signals for said multipath combiner.