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Adaptive Frequency-Domain Equalization with Narrowband Interference Suppression

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Abstract

Frequency-domain equalization (FDE) is an effective technique that exhibits the property of relatively low complexity which grows with increasing the number of symbols of dispersion in multipath propagation environments for broadband wireless communications compared with the conventional time-domain equalization. However, in practical broadband wireless communications, there exists not only multipath but also narrowband interference (NBI). The conventional FDE methods do not consider NBI and their performance degrades obviously in such case. In this paper, we propose a new optimization criterion which can effectively suppress NBI to obtain the maximum decision signal-to-noise ratio. The proposed scheme employs a conventional adaptive algorithm such as least-mean-square or recursive-least-square and operates in the spatial-frequency domain, which is concerned with the use of FDE and space diversity within block transmission schemes jointly. The simulation results show that the proposed schemes have better error-rate performance with low complexity and can be used even in the presence of strong NBI, compared to other existing adaptive FDE algorithms.

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Authors and Affiliations

  1. College of Information Engineering, Shenzhen University, Shenzhen, 518060, Guangdong, China

    Ning Xie, Hui Wang & Xiaohui Lin

  2. State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Ning Xie

Authors
  1. Ning Xie
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  2. Hui Wang
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  3. Xiaohui Lin
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Correspondence to Ning Xie.

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Xie, N., Wang, H. & Lin, X. Adaptive Frequency-Domain Equalization with Narrowband Interference Suppression. Wireless Pers Commun 70, 267–281 (2013). https://doi.org/10.1007/s11277-012-0693-4

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  • DOI: https://doi.org/10.1007/s11277-012-0693-4

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