METHOD AND DEVICE FOR GENERATING TURBO CODE OF RAISED HAMMING WEIGHT AND LOWERED NOISE FLOOR

摘要

"A method for generating Turbo code of raised hamming weight and lowered noise floor" A method for generating Turbo code of raised hamming weight and lowered noise floor, characterised in that the message bits are preprocessed by modulo 2 addition with a Psuedo Random Noise (PRN) sequence of relatively high correlation characteristic, and then converted into Turbo code in the conventional manner. A device for performing the method comprising two identically similar convolutional encoders (1, 3), interleaver (2) and puncturer (4), connected to form, the conventional Turbo encoder, characterised in that the device is provided with one each of modulo 2 adder (5), flipper (6) for PRN sequence (S) and serial-to-parallel bit converter (7) for message bits (M), being arranged to operate cooperatingly with said units (1, 2, 3, 4) forming the conventional Turbo encoder, for preprocessing of message bits (M),