Joint analog and digital interference cancellation in wireless systems

摘要

An apparatus for joint analog and digital interference cancellation includes a receiver configured to receive an analog reference interfering signal on a reference path, and a sum of an analog interference signal and an analog signal of interest on an antenna path. An analog interference canceller may be configured to produce an analog partially interference-cancelled signal using the analog reference interfering signal and the sum of the analog interference signal and the analog signal of interest. A first analog-to-digital converter may be configured to digitize the analog reference interfering signal to produce a digital reference interfering signal. A second analog-to-digital converter may be configured to digitize the analog partially interference-cancelled signal to produce a digital partially interference-cancelled signal. A digital interference canceller may be configured to produce an interference-cancelled signal using the digital reference interfering signal and the digital partially interference-cancelled signal.

主权项

1. A method for joint analog and digital interference cancellation, the method comprising:
receiving an analog reference interfering signal from an interference source, the analog reference interfering signal received on a reference path that comprises an amplifier; receiving a sum of an analog interference signal and an analog signal of interest on an antenna path; producing an analog partially interference-cancelled signal via analog interference cancellation using the analog reference interfering signal and the sum of the analog interference signal and the analog signal of interest; digitizing the analog reference interfering signal to produce a digital reference interfering signal; digitizing the analog partially interference-cancelled signal to produce a digital partially interference-cancelled signal; and producing an interference-cancelled signal via digital interference cancellation using the digital reference interfering signal and the digital partially interference-cancelled signal, wherein the analog reference interfering signal is propagated through a transmission medium to produce the analog interference signal, and wherein the analog interference cancellation and the digital interference cancellation are agnostic to the structure and parameters of the analog reference interfering signal.