Title: A Two-Channel Microphone Array with Adaptive Target Tracking Using Frequency Domain Generalized Sidelobe Cancellers Conference: Proceedings of IEEE International Symposium on Intelligent Signal Processing and Communication Systems

This paper proposes a two-channel adaptive microphone array with target tracking to reduce external noise in hands-free speech communications. The proposed microphone array has two processings, one of which is beamforming and the other is target tracking. The Frequency Domain Generalized Sidelobe Canceller (FDGSC), which is the frequency domain adaptive filter derived from the time domain adaptive filter called the Generalized Sidelobe Canceller (GSC), is proposed to beamform. The FDGSC reduces external noise in the input signal which is composed of a target signal and external noise. The adaptive target tracking algorithm based on the steepest decent algorithm is proposed to track a moving target. Target tracking prevents the cancellation of a target signal that occurs in the adaptive filtering. Numerical simulations show that the proposed microphone array improves the SNR even when the arrival angle of a target signal changes.