Patent ID: 7558338
Filing Date: 2009-07-07
Classification: H03D,H04B,H04L

Abstract:
1. A method for estimating an I/Q imbalance parameter of a receiver, comprising the steps of: transmitting a first signal modulated by a first and a second modulated carrier through only a single modulation path at a transmitter; receiving the first signal demodulated by a first demodulated carrier and a second demodulated carrier, respectively through first and second demodulation paths at a receiver; transmitting a second signal modulated by the first and the second modulated carrier through the single modulation path at the transmitter; receiving the second signal demodulated by the first and the second demodulated carrier respectively through the first and second demodulation paths at the receiver; and deriving the I/Q imbalance parameter of the receiver according to the first signal and the second signal transmitted by the transmitter and the demodulated first and second signals received by the receiver, wherein the first and second signals are symmetrical in the frequency domain.