A method comprising: over-sampling, at a desired frequency, a passband of received signals to create a bit stream, wherein the received signals include signals of interest and interference generating signals, the interference generating signals capable of generating intermodulation products inband of the signals of interest; isolating signals of interest in the bit stream using one or more decimating filters; isolating source signals that generate one or more intermodulation products inband of the signal of interest using one or more decimating filters; computing an estimate of each of the one or more intermodulation products from the source signals that generate the one or more intermodulation products; cancelling out one or more inband intermodulation products using the estimate of the intermodulation products; and performing phase and amplitude adjustment on estimations of the intermodulation product interfering signals in a closed loop manner, wherein performing phase and amplitude adjustment of the estimations comprises performing sub-sample phase shifts to make a phase adjustment on the estimations of the intermodulation product interfering signals. view more

An apparatus comprising: means for over-sampling, at a desired frequency, a passband of received signals to create a bit stream, wherein the received signals include signals of interest and interference generating signals, the interference generating signals capable of generating intermodulation products inband of the signals of interest; means for isolating signals of interest in the bit stream using one or more decimating filters; means for isolating source signals that generate one or more intermodulation products inband of the signal of interest using one or more decimating filters; means for computing an estimate of each of the one or more intermodulation products from the source signals that generate the one or more intermodulation products; means for canceling out one or more inband intermodulation products using the estimate of the intermodulation products; and means for performing phase and amplitude adjustment on estimations of the intermodulation product interfering signals in a closed loop manner, wherein the means for performing phase and amplitude adjustment of the estimations comprises means for performing sub-sample phase shifts to make a phase adjustment on the estimations of the intermodulation product interfering signals. view more

An apparatus comprising: a sampling unit to sample, at a desired frequency, a passband of received signals to create a bit stream, wherein the received signals include signals of interest and interference generating signals, the interference generating signals capable of generating intermodulation products inband of the signals of interest; one or more filters to isolate signals of interest and interfering signals in the bit stream; a cancellation unit to cancel out isolated interference generated signals using estimations of the intermodulation products generated by the isolated interfering signals, wherein the estimations of the isolated interfering signals comprise estimations of intermodulation products falling inband of the signals of interest; and a phase and amplitude adjuster to adjust the phase and amplitude of estimations of the isolated interfering signals in a closed loop manner, wherein the phase and amplitude adjuster performs phase and amplitude adjustment of the estimations by making sub-sample phase shifts to make a phase adjustment on the estimations of the isolated interfering signals. view more

A method for performing interference cancellation in a receiver, with a transmitter and the receiver being co-located with each other, the method comprising: generating intermodulation product (IMP) cancellation signals (ICSs) to cancel passive IMPs in the receiver, continuously and near real time, using copies of transmitter signals of the transmitter, wherein the passive IMPs are generated in passive transmitter components of the transmitter and receiver components of the receiver after a high powered amplifier (HPA) and transmitter filter of the transmitter, wherein the transmitter filter is coupled between the HPA and an antenna used by the transmitter, wherein generating the ICSs is based on a power series description of a non-linear process for generating the IMPs, and includes generating an n-th order ICS by, given three signals S1, S2 and S3, digitally multiplying and filtering S1×S1×S2 and S1×S2×S2 and S 1×S2×S3 and S1×S1×S3 and S2×S2×S3 and S1×S3×S3 and S2×S3×S3, where n is an integer. view more

A method for cancelling passive intermodulation products (IMPs), comprising: generating, with a priori knowledge of a transmitter signal set, continuous and real time IMP cancellation signals (ICSs) in a baseband digital signal set of a receiver co-located with a transmitter based on the transmitter signal set, wherein digital copies of the transmitter signal set are passed to the receiver, the passive IMPs are generated in the transmitter and receiver chain after a high power amplifier (HPA) and transmitter filters of the transmitter, wherein the transmitter filters are coupled between the HPA and at least one antenna used by the transmitter, and wherein the transmitter filters are configured to significantly reduce active IMPs in band of a passband of the receiver wherein generating the ICSs is based on a power series description of a non-linear process for generating the IMPs, and includes generating a 3rd order ICS by, given three signals S1, S2 and S3, digitally multiplying and filtering S1×S1×S2 and S1×S2×S2 and S1×S2×S3 and S1×S1×S3 and S2×S2×S3 and S1×S3×S3 and S2×S3×S3. view more

The method of claim 4, wherein generating the odd order ICSs comprises: digitally multiplying and filtering an odd number of digital signals, up to “n” in number, from the transmitter signal set.

A method comprising: receiving a digital copy of a transmitter signal at a receiver, the receiver co-located with a transmitter that generates the transmitter signal; and generating digital passive intermodulation product (IMP) cancellation signals (ICSs) to digitally, continuously and in real time, cancel passive IMPs falling within a receiver passband, the passive IMPs being generated after a high powered amplifier (HPA) and a transmitter filter of the transmitter, wherein the transmitter filter is coupled between the HPA and an antenna used by the transmitter, wherein generating the ICSs is based on a power series description of a non-linear process for generating the IMPs, and includes generating an n-th order ICS by given three signals S1, S2 and S3, digitally multiplying and filtering S1×S1×S2 and S1×S2×S2 and S1×S2×S3 and S1×S1×S3 and S2×S2×S3 and S1×S3×S3 and S2×S3×S3, where n is an integer. view more

An apparatus comprising: a transmitter; a receiver co-located with the transmitter; and circuitry to perform interference cancellation in the receiver, the circuitry configured to: generate intermodulation product (IMP) cancellation signals (ICSs) to cancel passive IMPs in the receiver, continuously and near real time, using copies of transmitter signals, wherein the passive IMPs are generated in passive transmitter and receiver components after a high powered amplifier (HPA) and transmitter filter, wherein the transmitter filter is coupled between the HPA and an antenna used by the transmitter, wherein the circuitry is further configured to generate the ICSs based on a power series description of a non-linear process for generating the IMPs, and is operable to generate an n-th order ICS by, given three signals S1, S2 and S3, digitally multiplying and filtering S1×S1×S2 and S1×S2×S2 and S1×S2×S3 and S1×S1×S3 and S2×S2×S3 and S1×S3×S3 and S2×S3×S3, where n is an integer. view more

The apparatus of claim 23, wherein the circuitry is further configured to: generate the odd order ICSs by digitally multiplying an odd number of digital signals, up to “n” in number, from the transmitter signal set; and filter the results to selectively create nth odd order active ICSs. view more

An apparatus comprising: a transmitter; a co-located receiver; and circuitry configured to: receive a digital copy of a transmitter signal at the co-located receiver; and generate digital passive intermodulation product (IMP) cancellation signals (ICSs) to digitally, continuously and in real time, cancel passive IMPs falling within a receiver passband, the passive IMPs being generated after a high powered amplifier (HPA) and a transmitter filter of the transmitter, wherein the transmitter filter is coupled between the HPA and an antenna used by the transmitter, wherein the ICSs are generated based on a power series description of a non-linear process for generating the IMPs, and an n-th order ICS is generated by, given three signals S1, S2 and S3, digitally multiplying and filtering S1×S1×S2 and S1×S2×S2 and S1×S2×S3 and S1×S1×S3 and S2×S2×S3 and S1×S3×S3 and S2×S3×S3, where n is an integer. view more