Patent ID: 8526543
Filing Date: 2013-09-03
Classification: H04L

Abstract:
1. A method of communication, the method comprising: receiving a training signal at a quadrature demodulation receiver, the training signal representing a plurality of predetermined reference values at a frequency +f or a frequency adjacent to the frequency +f and a plurality of corresponding predetermined mirror values at a frequency −f or a frequency adjacent to the frequency −f, wherein the sum of the products of each predetermined reference value and the corresponding predetermined mirror value is zero; generating a plurality of received values based on the received portion of the training signal representing the predetermined reference values at the frequency +f or the frequency adjacent to the frequency +f; generating a plurality of derotation values by multiplying each received value by the corresponding predetermined mirror value; and averaging the derotation values so as to obtain a quadrature imbalance estimate for the frequency −f or the frequency adjacent to the frequency −f.