tailieunhanh - Báo cáo hóa học: " Research Article A Low Delay and Fast Converging Improved Proportionate Algorithm for Sparse System Identification"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A Low Delay and Fast Converging Improved Proportionate Algorithm for Sparse System Identification | Hindawi Publishing Corporation EURASIP Journal on Audio Speech and Music Processing Volume 2007 Article ID 84376 8 pages doi 2007 84376 Research Article A Low Delay and Fast Converging Improved Proportionate Algorithm for Sparse System Identification Andy W. H. Khong 1 Patrick A. Naylor 1 and Jacob Benesty1 2 1 Department of Electrical and Electronic Engineering Imperial College London Exhibition Road London SW7 2AZ UK 2INRS-EMT Universite du Quebec Suite 6900 800 de la Gauchetiere Ouest Montreal QC Canada H5A 1K6 Received 4 July 2006 Revised 1 December 2006 Accepted 24 January 2007 Recommended by Kutluyil Dogancay A sparse system identification algorithm for network echo cancellation is presented. This new approach exploits both the fast convergence of the improved proportionate normalized least mean square IPNLMS algorithm and the efficient implementation of the multidelay adaptive filtering MDF algorithm inheriting the beneficial properties of both. The proposed IPMDF algorithm is evaluated using impulse responses with various degrees of sparseness. Simulation results are also presented for both speech and white Gaussian noise input sequences. It has been shown that the IPMDF algorithm outperforms the MDF and IPNLMS algorithms for both sparse and dispersive echo path impulse responses. Computational complexity of the proposed algorithm is also discussed. Copyright 2007 Andy W. H. Khong et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Research on network echo cancellation is increasingly important with the advent of voice over internet protocol VoIP . In such systems where traditional telephony equipment is connected to the packet-switched network the echo path impulse response which is typically of length 64128 milliseconds exhibits an active region in the range of 8-12 .

TÀI LIỆU LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.