Patent ID: 7042954
Filing Date: 2006-05-09
Classification: H04L

Abstract:
1. A 64-ary QAM (Quadrature Amplitude Modulation) demodulation apparatus for receiving an input signal R k (X k ,Y k ) comprised of a k th quadrature-phase signal Y k and a k th in-phase signal X k , and for generating soft decision values Λ(s k,5 ), Λ(s k,4 ), Λ(s k,3 ), Λ(s k,2 ), Λ(s k,1 ) and Λ(s k,0 ) for the input signal R k (X k , Y k ) by a soft decision means, comprising: a first soft decision value generator, adapted to receive the quadrature-phase signal Y  where Λ(s a second soft decision value generator, adapted to receive the in-phase signal X  where Λ(s