Patent ID: 8219059
Filing Date: 2012-07-10
Classification: H04B,H04W

Abstract:
1. A circuit comprising: a down-converter coupled to receive a first RF signal, the down-converter generates a second RF signal that operates at an intermediate frequency, wherein the first RF signal comprises a carrier frequency, an information signal and one or more desired band interferer signals; a channel select filter that is selected from a plurality of channel select filters, the channel select filter is coupled to receive the second RF signal, and the channel select filter, filters the one or more desired band interferer signals that are adjacent to a desired channel embedded in the second RF signal, and generates a third RF signal; an up-converter, coupled to receive the third RF signal, the up-converter generates a fourth RF signal, and the fourth RF signal is coupled to an input of a radio receiver; a first out-of-band filter that is coupled between an antenna to the down-converter; and a second out-of-band filter that is coupled between the up-converter and the input of the radio receiver, wherein the first out-of-band filter and second out-of-band filter have substantially identical filtering characteristics.