Patent ID: 6243423
Filing Date: 2001-06-05
Classification: H04L

Abstract:
A receiver comprising:receiving means for receiving a transmission signal and outputting reception symbol groups, wherein the transmission signal has been generated bypartitioning a coded bit series obtained by coding an information bit series for each prescribed information unit to generate coded bit groups,applying prescribed modulation to each of said coded bit groups to generate information symbol groups,inserting respective pilot symbols of known amplitude and phase into each of said information symbol groups to generate transmission symbol groups, anddispersedly superimposing respective symbols of said transmission symbol groups on a plurality of subcarriers forming a frequency channel;transmission line estimation means for extracting said pilot symbols from each of said reception symbol groups and estimating characteristics of the transmission line for each symbol in accordance with the amplitude and phase of said pilot symbols;weighting means forextracting information symbol groups from said reception symbol groups,calculating weighting factors representing a reliability of the transmission line fro respective symbols in accordance with an estimation result of said transmission line estimation means and said reception symbol groups, andmultiplying respective symbols of said extracted information symbol groups by weighting factors to represent the reliability of said transmission line on the respective symbols;demodulation means for restoring said coded bit groups by applying prescribed demodulation to said information symbol groups on which the reliability of said transmission line obtained by said weighting means is reflected; anddecoding means for applying maximum-likelihood series estimation to each of said coded bit groups obtained by said demodulation means to restore said information bit series.