Technique for improving the blind convergence of a two-filter ad

Details Technique for improving the blind convergence of a two-filter ad Technique for improving the blind convergence of a two-filter ad

1996-09-18

1998-11-10

Chin, Stephen

Pulse or digital communications

Equalizers

Automatic

375232, 375350, 3647242, H04L 2701

Patent

active

058357319

ABSTRACT:
A blind equalization cost function called the "constrained Hilbert cost function" (CHCF) provides for reliable blind convergence of a two-filter equalizer structure. In particular, the CHCF cost function is designed in such a way that the two filters are constrained to be a Hilbert pair. Advantageously, this technique can be used with any blind equalization algorithms, such as RCA, CMA, and MMA.

REFERENCES:
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patent: 4308618 (1981-12-01), Levy et al.
patent: 4646173 (1987-02-01), Kammeyer et al.
Y. Sato, "A Method of Self-Recovering Equalization for Multilevel Amplitude-Modulation Systems," IEEE Trans. Commun., pp. 679-682, Jun. 1975.
A. Benveniste and M. Goursat, "Blind Equalizers", IEEE Trans. Commun., vol. 32, No. 8, pp. 871-883, 1984.
N. K. Jablon, "Joint Blind Equalization, Carrier Recovery, and Timing Recovery for High-Order QAM Signal Constellations", IEEE Trans. Signal Processing, vol. 40, No. 6, pp. 1383-1897, 1992.
S. Chen, S. McLaughlin, P. M. Grant and B. Mulgrew, "Multi-Stage Blind Clustering Equaliser", IEEE Trans. Commun., vol. 43, No. 2/3/4, pp. 701-705, Feb./Mar./Apr. 1995.
J. K. Tugnait, "Blind Eqalization and Estimation of Digital Communication FIR Channels Using Cumulant Matching", IEEE Trans. Commun., vol. 43, No. 2/3/4 pp. 1240-1245, Feb./Mar./Apr. 1995.
J. J. Werner, "Tutorial on Carrierless AM/PM-Part I-Fundamentals and Digital CAP Transmitter", Contribution to ANSI X3T9.5 TP/PMD Working Group, Minneapolis, Jun. 23, 1992.

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