Transmission devices of the error correction encoder and the error correction decoder and error correction scheme

摘要

PROBLEM TO BE SOLVED: To provide an error correction encoder and an error correction decoder as well as a transmitter of an error correcting system capable of sufficiently obtaining an improvement in data transmission efficiency by improving a coding rate by an error correcting function. SOLUTION: A 1-bit signal of serial-to-parallel converted transmitted data input to a convolutional encoder 2 is divided into a real part and an imaginary part by a combination of a 2-bit signal output from the convolutional encoder 2 of the 1-bit signal of the serial-to-parallel converted transmitted data input to the convolutional encoder 2 and another signal not input to the encoder 2, and independently sent signal points are decided. Even at a receiver side, similarly, regions are decided and metric setting is conducted independently of the real part and the imaginary part, the real part and the imaginary part are Viterbi decoded together, results of the Viterbi decoding are input to the encode of the transmitter side and the convolutional encoder of the same configuration, and the transmitted data is decoded from its output and information of the region decision.