Browse > Article

A Complex Escalator Equalizer for Quadrature Modulation Systems  

김남용 (삼척대학교 정보통신공학과)
Publication Information
Abstract
In this paper we introduce a complex escalator (ESC) structure-Equalizer and investigate its performance in complex channels in QPSK undulation systems. The proposed complex equalizer has the complete orthogonalization property and is independent of eigenvalue spread ratio (ESR) of channel. The proposed complex ESC equalizer shows as 7 times faster convergence speed as that of the conventional complex TDL equalizer algorithms in a complex channel model for QPSK systems.
Keywords
Escalator; complex; equalizer; orthogonalization; QPSK.;
Citations & Related Records
연도 인용수 순위
  • Reference
1 B. Widrow, J. McCool, M. Larimore, and C. R. Johnson, Jr., 'Stationary and nonstationary learning characteristics of the LMS adaptive filter,' Proc. IEEE, vol. 64, pp. 1151-1162, Aug. 1976   DOI   ScienceOn
2 K. M. Kim, I. W. Cha and D. H. Youn, 'Adaptive multichannel Digital Filter with Lattice-Escalator Hybrid Structure,' Proceeding of the 1990 ICASSP, Vol. 3, pp. 1413-1416, New Mexico, USA, April. 1990   DOI
3 J. G. Proakis, Digital Communications. McGraw-Hill, 1989, 2nd ed.
4 V. Weerackody and S. A. Kassam, 'Dual-Mode Type Algorithms for Blind Equalization,' IEEE Trans. Comm., vol. COM-42, pp. 22-28, Jan. 1994   DOI   ScienceOn
5 N. Ahmed and D. H. Youn, 'On realization and related algorithm for adaptive prediction,' IEEE Trans. Acoust., Speech, Signal Processing, vol. ASSP-28, pp. 493-497, Oct. 1980
6 S. Haykin, Adaptive Filter Theory. Englewood Cliffs, NJ: Prentice Hall, 1991, 2nd ed.
7 V. N. Parikh and A. Z. Baraniecki, 'The Use of the Modified Escalator Algorithm to Improve the Performance of Transform-Domain LMS Adaptive Filters,' IEEE Trans. on Signal Processing, vol. 46, No. 3, pp. 625-635, March 1998   DOI   ScienceOn
8 D. K. Faddeev and V. N. Faddeeva, Computational Methods of Linear Algebra. San Francisco, CA: W. H. Freeman, 1963
9 B. Widrow, J. McCool, M. Ball, 'The Complex LMS Algorithm,' Proc. IEEE, pp. 719-720, April. 1975