Patent ID: 8175550
Filing Date: 2012-05-08
Classification: H04B

Abstract:
1. A method comprising: receiving an indication that a narrowband signal receiver operating on a first channel frequency in a first allocated spectrum is experiencing intermodulation interference caused in part by at least one broadband transmit signal from a radio signal transmitter operating on a second channel frequency in a second allocated spectrum; determining narrowband candidate frequency ranges within the at least one broadband transmit signal of the second channel frequency of the second allocated spectrum that linearly combine into frequencies that overlap the first channel frequency; and selectively filtering each narrowband candidate frequency range of the at least one broadband transmit signal until the intermodulation interference is substantially eliminated, wherein determining narrowband candidate frequency ranges comprises determining a mapping between the second allocated spectrum and the first allocated spectrum, wherein the mapping maps the first channel frequency into the second allocated spectrum based on linear combinations of the first channel frequency and channel frequencies in a third allocated spectrum.