METHOD FOR JUDGING OF HIGH-GRADE MODULATION FOR CONTINUOUS JUDGING VITERBI DECODING

摘要

PURPOSE: A method for judging of high-grade modulation for continuous judging viterbi decoding is provided to improve coding gain by continuous judging viterbi decoding through continuous judging about each bit. CONSTITUTION: A method for judging of high-grade modulation for continuous judging viterbi decoding includes the correlation(303) of each bit composing a symbol. The bit indicated as a square(301) indicates 0 and the bit indicated as a round(302) indicates 1 . Judging of the first information bit of the symbol is carried out by gaining the probability value of bit 0 and bit 1 about the value gained by formalizing signal Q as -sin from the composed table. Judging of the second information bit of the symbol is carried out by calculating the probability value of bit 0 and bit 1 from the table. Judging of the third information bit of the symbol is carried out by gaining the probability value of bit 0 and bit 1 about the value gained by formalizing according to the quadrant, on which the phase value gained from signal I and Q consists.