Wideband interference mitigation system with negative group delay and method for wideband interference cancellation

Abstract

Embodiments of a wideband interference mitigation (IM) system with negative group delay (NGD) compensation and method for wideband interference cancellation are generally described herein. In some embodiments, the wideband IM system may include first frequency-selective circuitry to capture interfering signals within a bandwidth of interest from a primary signal path after removal of a desired signal, cancellation circuitry to implement a negative group delay (NGD) on output signals from the first frequency-selective circuitry to generate negative group-delayed signals, and second frequency-selective circuitry to generate interference cancellation signals from the negative group-delayed signals for combining with signals from the primary signal path. The negative group delay provided by the cancellation circuitry may compensate for a group delay of the first frequency-selective circuitry, a group delay of the second frequency-selective circuitry and a group delay of primary signal path so that the interference cancellation signals have little or no group delay with respect to signals of the primary signal path within the bandwidth of interest.