Non-iterative impulse response shortening method for system latency reduction

Abstract

In this paper we present a non-iterative impulse response shortening method aiming to reduce the latency of a system. Our method exploits that smoothing the frequency-domain response generally leads to a shorter time-domain response. The method is simple to implement and has a computational complexity that is significantly lower than that of competing methods. Yet it achieves good performance. It can be used for applications involving system identification such as blind source separation (BSS), cross-talk cancellation and channel equalization. Our experimental results confirm the effectiveness of the method, demonstrating the benefit of the approach in the BSS and cross-talk cancelling applications.