Patent ID: 6301684
Filing Date: 2001-10-09
Classification: H04L

Abstract:
A data decoding apparatus for decoding convolution-coded input data which is input via a given wireless transmission medium, comprising;an equalizer for producing branch metrics from said input data depending on characteristics of said wireless transmission medium, state metrics being produced by summing said branch metric for each of transition paths of said input data, a transition path of said input data being selected based on said state metrics, said equalizer producing output data by performing most likelihood estimation based on said selection result;a decoding circuit for performing convolution decoding on said output data, wherein;said equalizer produces difference data between said state metrics as reliability data with respect to said output data; andsaid equalizer and said decoding circuit perform convolution decoding on said output data by making a soft decision after converting said output data into multi-value data based on said reliability data.