Abstract
Based on the theory of phase-locked loop, the analysis and simulation of direct frequency shift keying to phase-locked oscillator is presented. Then, a W-band digital communication system is developed, in which the millimeter wave phase-locked oscillator of the transmitter is modulated directly by 15grades 2048 kbit/s signal. The results of the experiment in the field show that the phase-locked loop has little influence on the modulating signal. It is a good way to simplify the transmitter configuration and suitable for high bit rate communication.
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