RADIO RECEIVER
Various apparatuses and methods are described to reduce interference in signals subject to intermodulation products and high power narrow band interfering signals on lower power wideband signals. Apparatuses and methods described herein also provide the capability for supporting multi-standards, multi-modes and multi-bands in wireless and wired applications with a single receiver or a receiver with minor variations. The receiver described herein samples the entire band in which there can be signals of interest or signals that can generate interference. All of these signals are sampled in one bit stream and the bit stream is processed to isolate signals of interest and interfering signals. The isolated interfering signals are then cancelled out of the signals of interest.
1 . A method comprising
digitizing a full pass band into a bit stream; and
sending a copy of the bit stream to each of a plurality of filters to process multiple high resolution, narrow band, time coherent signals simultaneously.
2 . The method defined in claim 1 wherein the plurality of filters are programmable.
3 . The method defined in claim 2 wherein the plurality of filters are programmed to process frequency hopped signals.
4 . The method defined in claim 3 wherein a first of the plurality of filters is switched out and programmed to a next hop frequency while a second of the plurality of filters processes a signal in at a current hop frequency.
5 . The method defined in claim 1 further comprising:
multiplying signals from the plurality of filters together to generate a result; and
filtering the result to a baseband of the signal of interest to create an estimate of an intermodulation product.
51 . An apparatus comprising:
means for digitizing a full pass band into a bit stream; and
means for sending a copy of the bit stream to each of a plurality of filters to process multiple high resolution, narrow band, time coherent signals simultaneously.