MODIFIED DUAL CARRIER MODULATION SIGNAL DEMODULATION METHOD BY HARD DECISION AND MODIFIED DUAL CARRIER MODULATION SIGNAL DEMODULATION METHOD BY SOFT DECISION

摘要

PURPOSE: An MDCM signal demodulation method is provided to reduce complexity of a demodulation system by reducing the number of multiplication operations and by reducing the number of candidate symbol vectors while maintaining the same performance with an ML method by demodulating an MDCM signal by dividing the MDCM signal into a real part and an imaginary part.;CONSTITUTION: An MDCM signal demodulation method includes a stage of generating real number candidate symbol vectors and imaginary number candidate symbol vectors corresponding to an MDCM(Modified Dual Carrier Modulation) signal pair, a stage of determining the real number candidate symbol vector having the minimum first norm value in the real number candidate symbol vectors as a real number symbol vector by calculating each norm of the real part of the MDCM signal pair and the real number candidate symbol vectors and a stage of determining the imaginary number candidate symbol vector having the minimum second norm value in the imaginary number candidate symbol vectors as an imaginary number symbol vector by calculating each norm of the imaginary part of the MDCM signal pair and the imaginary number candidate symbol vectors.;COPYRIGHT KIPO 2013;[Reference numerals] (S100) Receiving an MDCM signal; (S120) Generating the MDCM signal into a real number part and an imaginary number part; (S140) Selecting a real number candidate symbol vector/imaginary candidate symbol vector; (S160) Each norm operation of the real number part of the MDCM signal and the real number candidate symbol vector/each norm operation of the imaginary number part of the MDCM signal and the imaginary candidate symbol vector; (S180) Determining a symbol vector;