Principle and applications of asymmetric crosstalk-resistant adaptive noise canceler

This paper analyzes the performance of the crosstalk-resistant adaptive noi se canceler (CTRANC). The CTRANC system's symmetric structure causes incons istent performance when treating noise coming from different angles. To sol ve this problem, an asymmetric CTRANC (ACTRANC) structure using a delay uni t on the primary channel to guarantee causality of the system is proposed. This system is analyzed in steady state assuming that the primary and refer ence signals are uncorrelated. The ACTRANC allows flexible alignment of the noise source with the sensor array in advanced communication applications such as adaptive noise cancellation, acoustic echo cancellation, and adapti ve beamforming. Experiments are presented to demonstrate ACTRANC's performa nce improvement for various noise orientations. (C) 2000 The Franklin Insti tute. Published by Elsevier Science Ltd. All rights reserved.