Abstract
The recently introduced square contour algorithm (SCA) combines the benefits of the generalized Sato algorithm (GSA) and the constant modulus algorithm (CMA). It implicitly updates phase and is less likely to converge to incorrect solutions. But the SCA has relatively large residual error after the algorithm reaches its steady state for high-order constellations. A new blind equalization algorithm is proposed based on concurrent square contour algorithm (SCA) and soft decision-directed (SDD) adaptation. Like the SCA, the proposed concurrent SCA and SDD algorithm includes phase recovery and offers good convergence characteristics. Simulation results demonstrate that the proposed SCA+SDD algorithm offers practical alternatives to blind equalization of high-order QAM channels and provides significant equalization improvement over the CMA, GSA and SCA.
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References
Godard, D.: Self-Recovering Equalization and Carrier Tracking in Two-Dimensional Data Communication Systems. IEEE Trans. Commun. 28, 1867–1875 (1980)
Treichler, J.R., Agree, B.G.: A New Approach to Mutipath Correction of Constant Modulus Signals. IEEE Trans. Acoust. Speech Signal Process. 31, 459–472 (1983)
Johnson, C.: Blind Equalization using the CM Criterion: A Review. Proc. IEEE 86, 1927–1950 (1998)
Sato, Y.: A Method of Self-Recovering Equalization for Multilevel Amplitude Modulation Systems. IEEE Trans. Commun. 23, 679–682 (1975)
Yang, J.: The Multimodulus Blind Equalization and Its Generalized Algorithm. IEEE J. Sel. Areas Common. 20, 997–1051 (2002)
Thaiupathump, T., Kassam, S.A.: Square Contour Algorithm: A New Algorithm for Blind Equalization and Carrier Phase Recovery. In: Proceedings of the 37th Asilomar Conference on Signals, Systems and Computers, pp. 647–651 (2003)
Thaiypathump, T., He, L., Kassam, S.A.: Square Contour Algorithm for Blind Equalization of QAM Signals. Signal Processing 86, 3357–3370 (2006)
Karaoguz, J., Ardalan, S.H.: A Soft Decision-Decided Blind Equalization Algorithm Applied to Equalization of Mobile Communication Channels. In: ICC92, Chicago, vol. 3, pp. 1272–1276. IEEE, Los Alamitos (1992)
Chen, S.: Low Complexity Concurrent Constant Modulus Algorithm and Soft Decision Directed Scheme for Blind Equalization. IEE Proc.-Vis. Image Signal Process. 150, 312–320 (2003)
Chen, S.: Multi-Stage Blind Clustering Equalizer. IEEE Trans. Commun. 43, 701–705 (1995)
Shalvi, O., Weninstein, E.: New Criteria for Blind Deconvolution of Nonminimum Phase Systems (channels). IEEE Trans. IT 36, 312–321 (1990)
Weerackody, V., Kassam, S.A.: Dual-Mode Type Algorithms for Blind Equalization. IEEE Trans. Commun. 42, 22–28 (1994)
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Shunlan, L., Mingzeng, D. (2007). Soft Decision-Directed Square Contour Algorithm for Blind Equalization. In: Liu, D., Fei, S., Hou, Z., Zhang, H., Sun, C. (eds) Advances in Neural Networks – ISNN 2007. ISNN 2007. Lecture Notes in Computer Science, vol 4493. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-72395-0_82
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DOI: https://doi.org/10.1007/978-3-540-72395-0_82
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