Using pseudo random code to modulate the signal's phase equals to frequencyup-conversion of the pseudo random code by the carrier frequency.
信号采用伪随机编码进行相位调制，相当于是用载频对伪随机码进行上变频。
2
Conventional dual up-conversion transmitter usually employs an intermediate frequency (IF) mixer and a radio frequency (RF) mixer to convert baseband user signal to IF and RF in sequence.
Adopt IGBT frequencyconversion of German Siemens and voltage feedback series resonance circuit. The conversion efficiency is reaching up to above 97.5%.