Patent ID: 6130923
Filing Date: 2000-10-10
Classification: H04B

Abstract:
In a receiver which is adapted to receive multipath signals and includes a plurality of fingers, each finger being adapted to:a) separately demodulate a current received signal from each separate path; andb) measure a comparison energy between the current received signal as received by that finger and each possible channel symbol in a library of channel symbols;the improvement comprising:c) a plurality of energy storage units, wherein each energy storage unit is associated with a finger and is adapted to:i) store a measurement of the comparison energy between each possible channel symbol and a previous received signal as received by that finger;ii) receive an index from the below-recited combiner, the index uniquely determining one possible channel symbol;iii) decide whether the comparison energy between the determined channel symbol and the previous received signal is significant; andiv) apply a scaled version of the current received signal to the combiner if and only if the comparison energy is significant; andd) a combiner which is adapted to:i) combine the scaled versions of the current received signals into a combined signal;ii) measure a comparison energy between the combined signal and each possible channel symbol in the library of channel symbols;iii) determine an index for the channel symbol producing the maximum comparison energy with the combined signal;iv) feed back the index to the energy storage units; andv) pass on the index for further processing.