MSK (minimum shift keying) modulation signal generation method based on DDS (direct digital synthesis) phase accumulator address modification
A phase accumulator and modulation signal technology, applied in the field of signal processing, can solve the problems of complex clutter signals, difficulty in generating narrow pulses, interference with MSK modulation signals, etc.
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[0038] 1. Technical principle:
[0039] Such as figure 2 As shown, the direct frequency synthesis DDS signal is to generate a waveform by using the phase accumulator to query the storage table that stores the waveform information of the trigonometric function, such as Figure 4 shown.
[0040] The MSK modulation signal generates a waveform by phase-modulating the I and Q signals through the input data, where the I and Q signals are as follows:
[0041] C 2 k · cos π f b t = cos ( π f b t + 0.5 ...
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