Diversity-multiplexing tradeoff in multiple-antenna relay systems

We study the diversity-multiplexing tradeoff (DMT) for the full-duplex relay channel when the source and the destination have multiple antennas, and the relay has I or more. We find DMT upper bounds and investigate the achievable performance of decode-and-forward (DF), partial decode-and-forward (PDF), and compress-and-forward (CF) protocols. We study the effect of increased degrees of freedom in the direct link and the source-relay channel when multiple antennas are introduced. Our results suggest that while DF is DMT optimal when all terminals have one antenna each, it cannot maintain its good performance when the degrees of freedom in the direct link is increased. CF proves to be a more robust strategy, which works well in multi-antenna scenarios studied in this paper. We also extend our results for clustered relay networks to find DMT upper bounds and achievable performances.
IEEE International Symposium on Information Theory


Diversity-multiplexing tradeoff in half-duplex relay systems
Yüksel Turgut, Ayşe Melda; Erkip, Elza (2007-01-01)
We study the multiple antenna half-duplex relay channel from the diversity-multiplexing tradeoff (DMT) perspective. We find performance upper bounds and show that compress-and-forward (CF) protocol achieves the upper bound. We argue that although it is hard to find the exact DMT expressions for decode-and-forward (DF) type protocols, they would be suboptimal in the multiple antenna case. We also study the multiple-access relay channel (MARC), and evaluate how CF works in this system. Our results show that C...
Diversity-multiplexing tradeoff in cooperative wireless systems
Yüksel Turgut, Ayşe Melda; Erkip, Elza (2006-01-01)
We first examine a system with a single source-destination pair and two relays, each node with a single antenna, and explore whether this virtual multi-input multi-output (MIMO) system can mimic a physical MIMO in terms of diversity-multiplexing tradeoff (DMT). We show that even under the idealistic assumption of full-duplex relays and a clustered network, the relay system can never fully mimic a real MIMO DMT, it is multiplexing gain limited. The limitation comes from the fact that source and destination a...
Multiple-antenna cooperative wireless systems: A diversity-multiplexin tradeoff perspective
Yüksel Turgut, Ayşe Melda; Erkip, Elza (2007-10-01)
We consider a general multiple-antenna network with multiple sources, multiple destinations, and multiple relays in terms of the diversity-multiplexing tradeoff (DMT). We examine several subcases of this most general problem taking into account the processing capability of the relays (half-duplex or full-duplex), and the network geometry (clustered or nonclustered). We first study the multiple-antenna relay channel with a full-duplex relay to understand the effect of increased degrees of freedom in the dire...
Diversity-Multiplexing Tradeoff for the MIMO Static Half-Duplex Relay
Leveque, Olivier; Vignat, Christophe; Yüksel Turgut, Ayşe Melda (2009-01-01)
In this work, we investigate the diversity-multiplexing tradeoff (DMT) of the multiple-antenna (MIMO) static half-duplex relay channel. The relay channel is assumed to be symmetric in terms of number of antennas, i.e. the source and the destination have n antennas each, and the relay has m antennas. A general expression is derived for the DMT upper bound, which can be achieved by a compress-and-forward protocol at the relay, under certain assumptions. It is observed that the static half-duplex DMT matches t...
Cooperative diversity techniques for wireless networks
Bilgin, Ali; Yılmaz, Ali Özgür (2006-04-19)
Relay networks have usually been investigated within a single source (S), relay (R), and destination (D) group in the literature. In this work, cooperative diversity techniques will be investigated for relay networks having multiple S, R and D's. Simulations results for linear and uniform S, R and D localizations will be presented.
Citation Formats
A. M. Yüksel Turgut and E. Erkip, “Diversity-multiplexing tradeoff in multiple-antenna relay systems,” presented at the IEEE International Symposium on Information Theory, Washington, Amerika Birleşik Devletleri, 2006, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/96503.