Patent ID: 7760817
Filing Date: 2010-07-20
Classification: H03D,H03J,H04L

Abstract:
1. A communication system for calibrating a carrier leakage in a transmission signal, the communication system comprising: a carrier signal generator, for generating a first carrier signal to a first transmitting path and a second carrier signal to a second transmitting path; a transmitting module, coupled to the carrier signal generator and having the first transmitting path and the second transmitting path, for generating the transmission signal according to a single tone testing signal inputted to the first transmitting path, the first carrier signal and the second carrier signal; a testing signal generator, coupled to the transmitting module, for generating the single tone testing signal having a specific frequency; a power detection unit, coupled to the transmitting module, for detecting power of components associated with the specific frequency in the transmission signal to generate a power indicating signal; and a calibration apparatus, coupled to the transmitting module and the power detection unit, for applying at least a first candidate carrier leakage calibration parameter to the first transmitting path and determining a target carrier leakage calibration parameter of the first transmitting path according to a first power indicating signal corresponding to the first candidate carrier leakage calibration parameter; wherein when the calibration apparatus is determining the target carrier leakage calibration parameter of the first transmitting path, the testing signal generator generates the single tone testing signal to the first transmitting path but not to the second transmitting path.