Bi-directional half-duplex protocols with multiple relays

Details Bi-directional half-duplex protocols with multiple relays Bi-directional half-duplex protocols with multiple relays

2008-10-07

arxiv.org/abs/0810.1268v2

Computer Science

Information Theory

44 pages, 17 figures, Submitted to IEEE Transactions on Information Theory

Scientific paper

In a bi-directional relay channel, two nodes wish to exchange independent messages over a shared wireless half-duplex channel with the help of relays. Recent work has considered information theoretic limits of the bi-directional relay channel with a single relay. In this work we consider bi-directional relaying with multiple relays. We derive achievable rate regions and outer bounds for half-duplex protocols with multiple decode and forward relays and compare these to the same protocols with amplify and forward relays in an additive white Gaussian noise channel. We consider three novel classes of half-duplex protocols: the (m,2) 2 phase protocol with m relays, the (m,3) 3 phase protocol with m relays, and general (m, t) Multiple Hops and Multiple Relays (MHMR) protocols, where m is the total number of relays and 3

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