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Maximin SNR Beamforming Strategies for Two-Way Relay Channels

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3 Author(s)
Wenjin Wang ; Sch. of Syst. Eng., Univ. of Reading, Reading, UK ; Shi Jin ; Fu-Chun Zheng

In this letter, we consider beamforming strategies in amplified-and-forward (AF) two-way relay channels, where two terminals and the relay are equipped with multiple antennas. Our aim is to optimize the worse end-to-end signal-to-noise ratio of the two links so that the reliability of both terminals can be guaranteed. We show that the optimization problem can be recast as a generalized fractional programming and be solved by using the Dinkelbach-type procedure combined with semidefinite programming. Simulation results confirm the efficiency of the proposed strategies.

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Communications Letters, IEEE  (Volume:16 ,  Issue: 7 )