Journal of information and communication convergence engineering

  • 제2권2호
  • /
  • Pages.89-92
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  • 2004
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  • 2234-8255(pISSN)
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  • 2234-8883(eISSN)
한국정보통신학회 (The Korea Institute of Information and Commucation Engineering)
권호 표지

An Analysis on the Echo Cancellation Algorithm Reducing the Computational Quantities

  • Lee, Haeng-Woo (Dept. of information communication engineering, Namseoul university)
  • 발행 : 2004.06.01
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초록

An adaptive algorithm for reducing the hardware complexity is presented. This paper proposes a modified LMS algorithm for the adaptive system and analyzes its convergence characteristics mathematically. An objective of the proposed algorithm is to reduce the hardware complexity. In order to test the performances, it is applied to the echo canceller, and a program is described. The results from simulations show that the echo canceller adopting the proposed algorithm achieves almost the same performances as one adopting the NLMS algorithm. If an echo canceller is implemented with this algorithm, its computation quantities are reduced to the one third as many as the one that is implemented with the NLMS algorithm, without so much degradation of performances.

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참고문헌

  1. B. Widrow, J. R. Glover, J. M. McCool, J. Kaunitz, C. S. Williams, R. H. Hearn, J. R. Zeidler, E. Dong, R. C. Goodlin, 'Adaptive noise cancelling: Principles and applications,' Proc. IEEE, vol.63, pp. 1692-1716, Dec. 1975 https://doi.org/10.1109/PROC.1975.10036
  2. Niek A. M. Verhoeckx, Harry C. van den Elzen, Fred A. M. Snijders, Piet J. van Gerwen, 'Digital Echo Cancellation for Baseband Data Transmission,' IEEE Trans. on Acoustics, Speech, and Signal Processing, vol. ASSP-27, No.6, pp.768-781, Jun. 1981
  3. Theo A. C. M. Claasen. Wolfgang F. G. Mecklenbrauker, 'Comparison of the Convergence of Two Algorithms for Adaptive FIR Digital Filters,' IEEE Trans. on Acoustics, Speech, and Signal Processing, vol. ASSP-29, No.3, pp.670-678, Jun. 1981
  4. Niek A. M. Verhoeckx, Theo A. C. M. Claasen, 'Some Considerations on the Design of Adaptive Digital Filters Equipped with the Sign Algorithm,' IEEE Trans. on Comm. vol. COM-32, No.3, pp.258-266, Mar. 1984