International journal of advanced smart convergence

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
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Link Adaptation for Full Duplex Systems

  • Kim, Sangchoon (Department of Electronics Engineering, Dong-A University)
  • Received : 2018.10.03
  • Accepted : 2018.10.17
  • Published : 2018.12.31
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Abstract

This paper presents a link adaptation scheme for adaptive full duplex (AFD) systems. The signal modulation levels and communication link patterns are adaptively selected according to the changing channel conditions. The link pattern selection process consists of two successive steps such as a transmit-receive antenna pair selection based on maximum sum rate or minimum maximum symbol error rate, and an adaptive modulation based on maximum minimum norm. In AFD systems, the antennas of both nodes are jointly determined with modulation levels depending on the channel conditions. An adaptive algorithm with relatively low complexity is also proposed to select the link parameters. Simulation results show that the proposed AFD system offers significant bit error rate (BER) performance improvement compared with conventional full duplex systems with perfect or imperfect self-interference cancellation under the same fixed sum rate.

Keywords

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Figure 1. Adaptive modulation-based link selection for AFD model

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Figure 2. BER performance of the MIMO systems with perfect SI cancellation (ƞ = 0) under a fixed sum rate of 6 bits/transmission

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Figure 3. BER performance of the MIMO systems with ƞ = 0.01 under a fixed sum rate of 6 bits/transmission

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