Title :
A low-cost echo cancellation algorithm in DTMB On-Channel Repeater
Author :
Qian, Rui ; Xia, Wei ; He, Zishu ; Liu, Chang
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, we use adaptive filter to realize the echo cancellation strategy in On-Channel Repeater (OCR) based on the National Standard of China for Digital Terrestrial Multimedia Broadcasting (DTMB). In order to reduce the computational complexity and solve the drawbacks of convergence and steady state characteristics of the conventional fix step size Least Mean Square (LMS) algorithm, this article introduces a proposed variable step size LMS algorithm. The simulation result indicates that this algorithm costs fewer hardware resources that can be easily implemented by FPGA and has a better performance in convergence and steady state echo cancellation compared with the conventional LMS algorithm.
Keywords :
digital video broadcasting; echo suppression; least mean squares methods; multimedia communication; radio repeaters; wireless channels; DTMB; FPGA; LMS algorithm; adaptive filter; convergence; digital terrestrial multimedia broadcasting; echo cancellation algorithm; least mean square algorithm; on-channel repeater; steady state characteristics; Convergence; Digital TV; Echo cancellers; Hardware; Least squares approximation; Optical character recognition software; Signal processing algorithms; DTMB; LMS; adaptive filter; echo cancellation; signal processing;
Conference_Titel :
Signal Processing Systems (ICSPS), 2010 2nd International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-6892-8
Electronic_ISBN :
978-1-4244-6893-5
DOI :
10.1109/ICSPS.2010.5555698
