Adaptive Equalization with Variable Step Size Algorithm Based on Gradient for HF Channel

Fang Fang Han; Zi Hao Lin

doi:10.4028/www.scientific.net/AMR.989-994.3702

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 989-994Adaptive Equalization with Variable Step Size...

Adaptive Equalization with Variable Step Size Algorithm Based on Gradient for HF Channel

Abstract:

To further improve the performance of adaptive equalization in HF channel, a new variable step size algorithm is proposed based on the iterative gradient. The step size is set to a vector according to the weights of the equalizer, and it can vary with the iterative gradient during the equalization process. The algorithm overcomes the traditional variable step size with the constant scale for all the weights of the equalizer, thus it can obtain faster convergence rate and lower steady state error in HF channel. In the complex channel condition, the algorithm proposed in this paper can avoid the local minimum point of the objective function to obtain the global convergence performance. Simulation result shows the effectiveness in the Watterson channel model.

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Periodical:

Advanced Materials Research (Volumes 989-994)

Pages:

3702-3705

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.989-994.3702

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Online since:

July 2014

Authors:

Fang Fang Han*, Zi Hao Lin

Keywords:

Adaptive Equalization, Hf Channel, Iterative Gradient, Variable Step Size

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References

[1] JIANG Hong. Linear Equalization Methods under HF Channel [J]. Ship Electronic Engineering, 2013, 33(8): 85-87+112.

Google Scholar

[2] Shukla P K，Turner L F．Channe1-estimation-based adaptive DFE for fading multipath radio channels [J]. IEE Proc. Pt, 1991, 138(6): 525-543.

DOI: 10.1049/ip-i-2.1991.0070

Google Scholar

[3] TIAN Wei, ZHOU Xin-li, CHU Jian-chong, YU Cheng-fei. Research into HF channel equalization based on DS-VCC-DDEA algorithm [J]. Journal of Circuits and Systems, 2013, 18(1): 390-396.

Google Scholar

[4] GAO Ying, XIE Sheng-li. A variable step size LMS adaptive filtering algorithm and its analysis [J]. ACTA Electronica Sinica, 2001, 29(8): 1094-1097.

Google Scholar

[5] WATTERSON C C, JUROSHEK J R, BENSEMA W D. Experimental confirmation of an HF channel model [J]. IEEE Trans. On Commun. Technology, 1970, 18(6): 792-803.

DOI: 10.1109/tcom.1970.1090438

Google Scholar