Patent ID: 6693889
Filing Date: 2004-02-17
Classification: H04L

Abstract:
A time-diversity transmission and reception system comprising:a transmission device including: (1) convolutional coding means for convolution-coding input data, and outputting convolution-coded data; (2) first multiple puncturing pattern generation means for generating puncturing patterns having an identical puncturing rate, but having respectively different puncturing block patterns, said first multiple puncturing pattern generation means providing a reference matrix from which are generated said puncturing patterns; (3) first puncturing means for puncturing convolution-coded data output by said first convolutional coding means by using each of said puncturing patterns supplied by said first multiple puncturing pattern generation means, and outputting punctured data; (4) diversity transmission timing control means for outputting a diversity transmission timing control signal for carrying out transmission for a plural number of times; (5) time-diversity modulation/transmission means for modulating and transmitting, as diversity transmission data, said punctured data output by said first puncturing means in response to said diversity transmission timing control signal, and a receiving device including: (1) diversity reception timing control means for outputting a predetermined diversity reception timing control signal or carrying out reception of a signal transmitted with time diversity transmission; (2) time-diversity reception/demodulation means for receiving and demodulating each of the signals transmitted by said transmission device, in response to said diversity reception timing control signal, and outputting demodulated data; (3) second multiple puncturing pattern generation means for generating puncturing patterns, which are identical to the puncturing patterns generated by said first multiple puncturing pattern generation means; (4) first depuncturing means for depuncturing the demodulated data output from said time-diversity reception/demodulation means by using the puncturing patterns supplied by said second multiple puncturing pattern generation means, and outputting depunctured data; (5) first combining means for combining the depunctured data output by said first depuncturing means, and outputting a result of combining; and (6) first convolutional decoding means for convolution-decoding said result of combining, and outputting decoded data, wherein said time-diversity transmission and reception system executes time-diversity transmission and reception of error-correction code words, as individual diversity branch data, obtained by puncturing and convolution-coding information data with the puncturing patterns, and said first multiple puncturing pattern generation means comprises a first reference matrix generation means for generating a reference matrix for one of said puncturing patterns, and a first matrix conversion means for outputting a different puncturing pattern for each one of a plurality of diversity branches by converting at least one of rows, columns and elements of said reference matrix.