Patent ID: 7656974
Filing Date: 2010-02-02
Classification: H03M,H04L

Abstract:
1. A method executed in a receiver that receives a vector Y of symbols Y i , i=1, 2, . . . , T from a transmitter that transmits a vector X of symbols X i , i=1, 2, . . . , T via a transmission medium that is modeled by an input output Hidden Markov Model defined by n internal states, having an initial state probability vector π and an input-output probably density matrix P(X i ,Y i ), where elements of P(X i ,Y i ), p ij (X, Y)=Pr(j, X, Y|i), are conditional probability density functions of input X and corresponding output Y after transferring from state i to state j, comprising the steps of: creating an initial estimate vector X selecting symbols for estimate vector X computing a distance measure when the distance measure is outside a preselected threshold, incrementing index p and returning to said step of selecting; and when the distance measure is within said preselected threshold, outputting vector X