The present invention relates to a multiple repeated phase shift code shift keying modulation method, and a demodulation method therefor. A set of messages consisting of several binary bits repeatedly modulate, with the same phase and by means of code shift keying, N identical pseudo-random sequences, sequentially connect said N identical pseudo-random sequences having the same initial phase so as to form a new modulation symbol, and complete multiple repeated phase shift code shift keying modulation; a receiving end uses a comb filter to superimpose the received N sets of pseudo-random sequence data within the same symbol into one set of pseudo-random sequence data, and then performs matching filtering with pseudo-random sequences locally generated by the receiving end, searches for pseudo-random sequence phases corresponding to correlation peaks, and completes R-CSK message demodulation. By comprehensively taking into account factors such as spreading gain, information transmission rate, bit error rate, and modulation and demodulation signal processing complexity, said method of the present invention has a better performance than the conventional CSK modulation method.
MULTIPLE REPEATED PHASE SHIFT CODE SHIFT KEYING MODULATION METHOD AND DEMODULATION METHOD THEREFOR