Patent ID: 9337877
Filing Date: 2016-05-10
CPC Classification: H04B,H04J,H04L

Claim Text:
1. A method comprising: receiving an incoming radio-frequency (RF) signal, wherein the incoming RF signal includes a self-interference component generated by the transmission of an outgoing radio-frequency signal; creating a plurality of reference signals from the outgoing RF signal, wherein each of the reference signals is a replica of the outgoing RF signal, and wherein each of the reference signals has a unique delay value with respect to the outgoing RF signal; for each of the plurality of reference signals; splitting the reference signal into a reference RF in-phase component and a reference RF quadrature component, determining amplitude and phase adjustments based on the reference RF in-phase and quadrature components by correlating the reference RF in-phase component with an error signal to determine a reference in-phase weight and correlating the reference RF quadrature component with the error signal to determine a reference quadrature weight, adjusting an amplitude and phase of the reference RF in-phase and quadrature components by weighting the reference RF in-phase component by the reference in-phase weight to generate an RF in-phase cancellation component and weighting the reference RF quadrature component by the reference quadrature weight to generate a RF quadrature cancellation component, combining the RF in-phase cancellation component with the RF quadrature cancellation component to generate an RF cancellation signal; and creating the error signal by combining the plurality of respective RF cancellation signals with the incoming RF signal and cancelling at least a portion of the self-interference component based on the error signal.