METHOD FOR MODULATION AND DEMODULATION FOR PPM

摘要

PURPOSE: A data modulating method and demodulation method group a plurality of symbols is provided so that the symbol configuration is added in the fixed symbol, and the average information content is multiplied. CONSTITUTION: A data for to transmitting a message is inputted(S101). The transmitter confirms the value of the first bit among data for to transmitting of four bits(S102). The first bit is 0. According to transmitter is the second bit, the third bit, and the value of the fourth bit, the first symbol, and the second symbol and the third symbol are decided(S103-S105).