ACTIVE INTERFERENCE CANCELLATION APPARATUS, SIGNAL ISOLATION CONTROL APPARATUS AND METHOD OF ACTIVELY CANCELLING INTERFERENCE

摘要

An apparatus comprises a receiver chain (241) comprising an input node (226) and a transmitter chain (200) comprising a tap (228) and output nodes (214). An auxiliary transmitter chain (227) comprises an auxiliary input node (229) coupled to the tap node (228), an adaptive filter unit (231, 252, 255) and a signal output coupled to the input node (226). The filter unit (231, 252, 255) comprises an interpolation processor (255), and an adaptive filter (231) and a coefficient processor (252) coupled to the receiver chain (241) and the adaptive filter (231). The transmitter chain (200) generates a first waveform comprising a plurality of frequency-separated signals. Contemporaneously, the auxiliary chain (227) applies a second waveform comprising another plurality of frequency-separated signals at the input node (226). The receiver chain (241) receives a composite waveform comprising a waveform coupled from the output node (214) and the second waveform. The first waveform lacks signals required for determination of coefficients of the filter (231) whose frequencies coincide with the another plurality of signals of the second waveform.