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CTH17-3: High Performance Static and Dynamic Cooperative Communication Protocols for the Half Duplex Fading Relay Channel

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2 Author(s)
Narayan Prasad ; NEC Labs., Princeton, NJ ; Mahesh K. Varanasi

We propose two novel communication protocols for the quasi-static coherent fading relay channel and analyze them under the diversity-multiplexing tradeoff framework. Both these protocols satisfy the half-duplex constraint and fall under the class of decode and forward (DF) protocols, wherein the relay node attempts to decode the source signal and if successful transmits the re-encoded signal. Our first protocol is a static DF protocol where the relay waits for a fixed (channel independent) duration before attempting to decode. We show that it achieves a tradeoff curve that uniformly improves upon those of the previous best known static half-duplex protocols, which are the NAF protocol and the STC3 protocol. Our second protocol is a dynamic DF protocol where the relay waits for a dynamic (channel dependent) duration before attempting to decode and it is shown to achieve a tradeoff curve that uniformly improves upon those of all previously proposed half-duplex protocols, including the dynamic DF protocol.

Published in:

IEEE Globecom 2006

Date of Conference:

Nov. 27 2006-Dec. 1 2006