Optimal Amplify and Forward Strategy for Two-Way Relay Channel with Multiple Relays

 

Authors:

Rahul Vaze and Robert. W. Heath Jr.

Reference:

In Proc. IEEE Information Theory Workshop, Volos, Greece, June 2009, pp 181 - 185 .

Abstract:

An iterative algorithm is proposed to achieve the optimal rate region in a two-way relay channel, where two nodes want to exchange data with each other using multiple relays, and each relay employs an amplify and forward strategy. The iterative algorithm solves a power minimization problem at every step, subject to minimum signal-to-interference-and-noise ratio constraints, which is non-convex, however, for which the Karush Kuhn Tucker conditions are sufficient for optimality. Using simulations, the achievable rate region of the iterative algorithm is compared with the cut-set upper bound; the gap is shown to be quite small for most cases.

 

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