HKUST Library Institutional Repository Banner

HKUST Institutional Repository >
Electronic and Computer Engineering  >
ECE Working Papers >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/2252
Title: Throughput maximization of ad-hoc wireless networks using adaptive cooperative diversity and truncated ARQ
Authors: Dai, Lin
Letaief, K. B.
Keywords: Cooperative diversity
Truncated ARQ
Cross-layer design
Adaptive resource allocation
MIMO
Ad-hoc networks
Issue Date: 2005
Citation: Submitted to IEEE Transactions on Communications
Abstract: We propose a cross-layer design which combines truncated ARQ at the link layer and cooperative diversity at the physical layer. In this scheme, both the source node and the relay nodes utilize an orthogonal space-time block code for packet retransmission. In contrast to previous cooperative diversity protocols, here cooperative diversity is invoked only if the destination node receives an erroneous packet from the source node. In addition, the relay nodes are not fixed and are selected according to the channel conditions using CRC. It will be shown that this combination of adaptive cooperative diversity and truncated ARQ can greatly improve the system throughput compared to the conventional truncated ARQ scheme and fixed cooperative diversity protocols. We further maximize the throughput by optimizing the packet length and modulation level and will show that substantial gains can be achieved by this joint optimization. Since both the packet length and modulation level are usually discrete in practice, a computationally efficient algorithm is further proposed to obtain the discrete optimal packet length and modulation level.
URI: http://hdl.handle.net/1783.1/2252
Appears in Collections:CenWIT Working Papers
ECE Working Papers

Files in This Item:

File Description SizeFormat
0_throughputmaximization_cooperativediversity_IEEE_Trans_Commun.pdf390KbAdobe PDFView/Open

All items in this Repository are protected by copyright, with all rights reserved.