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Tensor-Based Joint Channel Estimation and Symbol Detection for AF MIMO Relay Networks

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Abstract

A study on the joint channel and symbol estimation issue is provided for two hop relay networks which employ the amplify-and-forward (AF) relaying approach. The encoding scheme at the source node introduces the time-domain spreading with a time-varying linear constellation precoding. Then, a set of amplifying factors matrices is utilized by the relays to amplify and forward the received data to the destination. The received signal at the destination can be constructed as a fourth-order tensor model, which is referred to as the nested parallel factor (PARAFAC) model. And then, we present a novel Levenberg-Marquardt (LM) algorithm based on this tensor model. The proposed method does not require complex signal processing at the relay, which effectively reduces the burden of relay. As a semi-blind method, which does not require the pilot signal, the proposed receiver can jointly recover the channels and information symbols. Moreover, the proposed semi-blind receiver is robust as it can work in different wireless channel scenarios. Simulations are conducted to demonstrate the efficiency of the proposed semi-blind approach.

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Authors and Affiliations

  1. School of Information and Communication Engineering, Communication University of China, Beijing, 100024, China

    Jianhe Du  (杜建和)

  2. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Heyun Lin  (林和昀), Chaowei Yuan  (袁超伟) & Zhongwei Hu  (胡仲伟)

Authors
  1. Heyun Lin  (林和昀)
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  2. Chaowei Yuan  (袁超伟)
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  3. Jianhe Du  (杜建和)
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  4. Zhongwei Hu  (胡仲伟)
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Corresponding author

Correspondence to Jianhe Du  (杜建和).

Additional information

Foundation item: the National Natural Science Foundation of China (Nos. 61601414 and 61701448), the National Key Research and Development Program of China (No. 2016YFB0502001), and the Fundamental Research Fund for the Central Universities (Nos. 2018CUCTJ082 and CUC18A007)

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Lin, H., Yuan, C., Du, J. et al. Tensor-Based Joint Channel Estimation and Symbol Detection for AF MIMO Relay Networks. J. Shanghai Jiaotong Univ. (Sci.) 25, 88–96 (2020). https://doi.org/10.1007/s12204-019-2077-3

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  • DOI: https://doi.org/10.1007/s12204-019-2077-3

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