| Type of Document |
Dissertation |
| Author |
Chembil Palat, Ramesh
|
| Author's Email Address |
rchembil@vt.edu |
| URN |
etd-12132006-142934 |
| Title |
Performance analysis of cooperative communication for wireless networks |
| Degree |
PhD |
| Department |
Electrical and Computer Engineering |
| Advisory Committee |
| Advisor Name |
Title |
| A. Annamalai |
Committee Co-Chair |
| Jeffrey H. Reed |
Committee Co-Chair |
| Calvin J. Ribbens |
Committee Member |
| Steven W. Ellingson |
Committee Member |
| William H. Tranter |
Committee Member |
|
| Keywords |
- diversity
- MIMO
- wireless
- relaying
- time synchronization error
- cooperative communication
|
| Date of Defense |
2006-12-08 |
| Availability |
unrestricted |
Abstract
The demand for access to information when and where you need has motivated the transition of wireless communications from a fixed infrastructure based cellular communications technology to a more pervasive adhoc wireless networking technology. Challenges still remain in wireless adhoc networks in terms of meeting higher capacity demands, improved reliability and longer connectivity before it becomes a viable widespread commercial technology. Present day wireless mesh networking uses node-to-node serial multi-hop communication to convey information from source to destination in the network. The performance of such a network depends on finding the best possible route between the source and destination nodes. However the end-to-end performance can only be as good as the weakest link within a chosen route. Unlike wired networks, the quality of point-to-point links in a wireless mesh network is subject to random fluctuations. This adversely affects the performance resulting in poor throughput and poor energy efficiency.
In recent years, a new paradigm for communication called cooperative communications has been proposed for which initial information theoretic studies have shown the potential for improvements in capacity over traditional multi-hop wireless networks. Cooperative communication involves exploiting the broadcast nature of the wireless medium to form virtual antenna arrays out of independent single-antenna network nodes for transmission. In this research we explore the fundamental performance limits of cooperative communication under more practical operating scenarios. Specifically we provide a framework for computing the outage and ergodic capacities of non identical distributed MIMO links, study the effect of time synchronization error on system performance, analyze the end-to-end average bit error rate (ABER) performance under imperfect relaying, and study range extension and energy efficiency offered by the system when compared to a traditional system.
|
| Files |
| Filename |
Size |
Approximate Download Time
(Hours:Minutes:Seconds)
|
| 28.8 Modem |
56K Modem |
ISDN (64 Kb) |
ISDN (128 Kb) |
Higher-speed Access |
| |
dissertation_rcp.pdf |
1.17 Mb |
00:05:25 |
00:02:47 |
00:02:26 |
00:01:13 |
00:00:06 |
|
