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DTTB同频直放站改进的回波抵消器 被引量:1

Improved Echo Canceller for on-Channel Repeater in DTTB Networks
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摘要 基于数字地面电视广播(DTTB)同频直放站,设计了一种改进的回波抵消器(EC),采用滤波器分段的方法,将传统回波抵消器的有限冲激响应滤波器分割为若干个子滤波器,并与最小均方(LMS)算法相结合,估计各个子滤波器的输出误差信号功率。通过比较子滤波器的误差信号功率,自适应地选取子滤波器的个数或整个FIR滤波器的阶数。改进的回波抵消器克服了在回波抵消器设计中信道阶数先验知识不足的缺点。仿真表明,与传统的回波抵消器相比,改进的回波抵消器获得了较小的残留回波干扰。 This paper designs an improved echo canceller for on-channel repeater in the digital terrestrial television broadcasting (DTTB) networks. The finite impulse response (FIR) filter of the conventional echo canceller is split into several sub-filters and the output error power for the different sub-filters is estimated. Based on comparison of the output error power of the different sub-filters, the improved echo canceller adaptively selects the number of sub-filters or the tap length for the echo canceller. The improved echo canceller overcomes the fault of unknown knowledge of the tap length for the echo canceller design. Simulations illustrate that the improved echo canceller can attain the lower residual echo interference compared with the conventional echo canceller.
出处 《电子科技大学学报》 EI CAS CSCD 北大核心 2012年第4期532-536,共5页 Journal of University of Electronic Science and Technology of China
基金 广东省2009年粤港关键领域重点突破项目(2009205133) 四川省科技技撑计划基金(2010GZ0149)
关键词 数字地面电视广播 回波抵消器 同频直放站 可变阶数 digital terrestrial television broadcasting echo cancellation on-channel repeater variable tap length
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参考文献10

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同被引文献13

  • 1魏文斌,江晶.一种有效的阈值反卷积算法[J].电子学报,2005,33(B12):2531-2534. 被引量:6
  • 2Lahdekorpi, E, Isotalo, T., Khan, S.U., Lempifiinen, J. Implementa- tion aspects of RF-repeaters in cellular networks [C]. Personal In- door and Mobile Radio Communications (PIMRC) [J]. IEEE 21st International Symposium , 2010,25:2511-2516.
  • 3Aniruddha,D.S., Pratha,V.M. Adaptive Algorithms for Echo Cancel- lation International Conference on Computer Science and Informa- tion Technology [J]. IEEE Press, 2011,6:88-90.
  • 4Renjie Su, Jiangnan Yuan, Zonghuang Weng, et al. High Speed Im- plementation of DLMS Filter in WCDMA Interference Cancella- tion Repeater International Conference on Information Theory and Information Security [J]. IEEE Press, 2011,1:717-722.
  • 5Lotfizad Mojtaba, Yazdi Hadi Sadoghi. Modified Clipped LMS Al- gorithm [J]. EURASIP Journal on Advances in Signal Processing, 2011, 2005,(8):1229-1234.
  • 6Aniruddha D. Shelotkar, Pratha V.Mishra. Adaptive Algorithms for Echo Cancellation [C]. IEEE 2012,8:88-90.
  • 7U.Ramachandraiah, M.Singaperumal, B.Purniah. Adjoint LMS (ALMS) Algorithm Based Active Noise Control with Feedback Path Modeling [J]. International Journal on Computer Science and Engineering, 2010,2(9):2790-2794.
  • 8杨海钢,孙嘉斌,王慰.FPGA器件设计技术发展综述[J].电子与信息学报,2010,32(3):714-727. 被引量:220
  • 9杨东,王建业.DLMS高速自适应滤波器的FPGA实现[J].电声技术,2010,34(5):41-43. 被引量:4
  • 10李学易,郝禄国,杨建坡,马绍轩.同频数字直放站回波干扰消除器的设计[J].电视技术,2010(7):16-19. 被引量:7

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