Conference Proceedings

Opportunistic network coding for two-way relay fading channels

N Ding, I Nevat, GW Peters, J Yuan

IEEE International Conference on Communications | IEEE | Published : 2013


When designing two-way relay channels, there is a dilemma of how to reduce the transmission power by network coding (XORing symbols of opposite directions) with a low symbol delay. Moreover, if the channels are fading, an extra penalty caused by error probability should be added to each transmission, which makes the decision-making problem more complex. In this paper, we propose a new model that considers instantaneous signal to noise ratio (SNR) in addition to queue occupation status. In this model, the channel state evolution is traced by a finite state Markov chain. We develop an efficient computational solution utilizing value iteration algorithm to find an optimal policy regarding symbo..

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