MODULATION CIRCUIT OF DIGITAL TRANSMITTER DIGITAL TRANSMITTER AND SIGNAL MODULATION METHOD

摘要

The invention modulates the digital transmitter circuit, to a transmitter and a digital signal modulation method. Modulation circuit comprises comprising a first synchronization circuit, and a digital modulator, and the first synchronization circuit is a first synchronization unit and a second synchronization unit, a first synchronization unit and a second synchronization unit, the first local frequency signal or the for the second local frequency signal acquires a delay signal corresponding to perform phase delay, and the first rising edge and falling edge of the adjusted signal is to be separately in the low level range of the first local frequency signal, and a second rising and falling of the adjusted signal edge is to be individually in the low level range of the second local frequency signal and the corresponding first adjusted signal by using a delayed signal by performing the phase adjustment on the digital baseband signal and a generates a second adjusted signal, a digital modulator for modulating a first adjusted signal by using the first local frequency signal and generating a first radio frequency signal, by using the second local frequency signal a second adjustment It modulates the signal to generate a second radio frequency signal. ;