Improved binary-coded character modulation method of satellite navigation system signals

The invention relates to an improved binary-coded character modulation method of satellite navigation system signals, belonging to the technical field of satellite navigation. On the basis of binary-coded characters, the traditional spread spectrum character is split into K units; each unit uses the character pulse waveform based on MSK (minimum shift keying) instead of the binary value waveform; and proper parameters are selected, thereby having the advantages of interference rejection, multipath resistance and compatibility of the binary-coded character, realizing the constant enveloping of MSK modulation, enhancing the efficiency of the power amplifier, realizing large side lobe attenuation and the like. The invention uses the improved binary-coded character modulation to enhance the code tracking performance, multipath resistance, interference rejection and compatibility with other navigation signals, thereby realizing constant enveloping of signals and avoiding the occurrence of large-amplitude side lobe