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Simple closed-loop method to compensate interference asymmetry in time-division duplex MIMO-OFDM systems

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Abstract

In wireless communications systems with time-division duplex (TDD) deployment, channel reciprocity and symmetric interference between transmitter and receiver sides are two widely-adopted assumptions for the design of optimal adaptation transmission mode. However, in practice, there is an undesirable but non-negligible effect, namely the asymmetric interference, that makes the assumptions no longer valid. In this paper, a simple closed-loop feedback method of compensating interference asymmetry in TDD multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system is proposed. The system makes the estimated interference at transmit-side be able to track the instantaneous receive-side interference dynamically. The proposed method maintains constant frame error rate (FER) by adopting adaptive modulation coding (AMC) and power loading. The final simulations have verified the effectiveness of the new method.

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Authors and Affiliations

  1. College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China

    Rong-fang Song  (宋荣方) & Duan-yang Zeng  (曾端阳)

  2. National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, China

    Rong-fang Song  (宋荣方)

Authors
  1. Rong-fang Song  (宋荣方)
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  2. Duan-yang Zeng  (曾端阳)
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Corresponding author

Correspondence to Rong-fang Song  (宋荣方).

Additional information

Foundation item: the National Natural Science Foundation of China (No. 60572130), the Open Research Fund of National Mobile Communications Research Laboratory, Southeast University, the Research Fund of Qing-Lan Engineering, Jiangsu Province, the Key Project of Natural Science Research Program of Universities, Jiangsu Province (No. 08KJD510001), the Doctorial Fundation of Ministry of Education, and the National Basic Research Program (973) of China (No. 2007CB310607)

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Song, Rf., Zeng, Dy. Simple closed-loop method to compensate interference asymmetry in time-division duplex MIMO-OFDM systems. J. Shanghai Jiaotong Univ. (Sci.) 14, 503–509 (2009). https://doi.org/10.1007/s12204-009-0503-7

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  • DOI: https://doi.org/10.1007/s12204-009-0503-7

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