A method and apparatus are provided that determine a frequency dependent calibration vector for a set of transmit or receive chains of a radio communications system using only differential phase and amplitude between the transmit chains and the receive chains, respectively. In one embodiment, the invention...http://www.google.es/patents/US6570527?utm_source=gb-gplus-sharePatente US6570527 - Calibration of differential frequency-dependent characteristics of a radio communications system
Calibration of differential frequency-dependent characteristics of a radio ...