Interference mitigation method and apparatus for multiple collocated transceivers

摘要

An apparatus and method for mitigating interference between multiple collocated radio transceivers operating through a common antenna. In a preferred form, the apparatus includes a filter bank containing bandpass filters corresponding to a number of desired operating frequency bands. Each transceiver can be selectively electrically interconnected with the common antenna through an appropriate filter. The filters attenuate out-of-band interference. An adaptive cancellation device is also provided to compare samples of the transmitted and received signals and produce an interference cancellation signal that is substantially equal in amplitude and 180 DEG out of phase with the coherent portions of the compared transmitted and received signals.