Patent ID: 9294264
Filing Date: 2016-03-22
CPC Classification: H03K,H03L,H04L

Claim Text:
1. A wireless communication system comprising: an antenna configured to receive a radio frequency signal; a duplexer coupled with the antenna; a low noise amplifier configured to amplify the radio signal via the duplexer and output a reception signal; a reception mixer circuit configured to output a reception baseband signal based on the reception signal; a reception phase-locked loop circuit configured to provide a reception local signal to the reception mixer circuit, the reception phase-locked loop circuit operating in synchronization with a first clock signal of a first frequency; a baseband processing unit configured to output a transmission baseband signal based on the reception baseband signal; a transmission mixer circuit configured to output a modulated signal based on the transmission baseband signal, a transmission phase-locked loop circuit configured to provide a transmission local signal to the transmission mixer circuit, the transmission phase-locked loop circuit operating in synchronization with a second clock signal of a second frequency; and a power amplifier configured to amplify the modulated signal and output a transmission signal to the duplexer, wherein the reception mixer circuit outputs the reception baseband signal based on the reception local signal, wherein the transmission mixer circuit outputs the modulated signal based on the transmission local signal, wherein the reception phase-locked loop circuit is configured to select the first frequency based on first frequency band information of a reception standard such that a spurious signal frequency does not overlap with a predetermined signal band of the reception standard centered at a transmission carrier frequency, wherein the transmission phase-locked loop circuit is configured to select the second frequency based on a second frequency band information of a transmission standard such that a spurious signal frequency does not overlap with a predetermined signal band of the transmission standard centered at a receiving carrier frequency.