Performance evaluation of a cooperative diversity enhanced ad hoc network
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Authors
Tope, Michael A.
Subjects
Wireless
Ad Hoc Network
Synthetic Waveguide
Cooperative Diversity
MIMO
Channel Capacity
Outage Model
Ad Hoc Network
Synthetic Waveguide
Cooperative Diversity
MIMO
Channel Capacity
Outage Model
Advisors
McEachen, John C.
Rosser, Daniel M.
Date of Issue
2002-12
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
Currently wireless multi-hop ad hoc networks utilize protocols that relay packets of data node-by-node along a path connecting the source node to the sink node. This thesis describes a new methodology called "Cooperative Diversity" where information is relayed from the source to the sink via clusters of neighboring nodes. We first describe a routing protocol to establish spatially diversified paths through a field of randomly dispersed nodes. Second, an idealized configuration called the "Synthetic Waveguide" is introduced and its information theoretic channel capacity is developed. Third, we derive an outage model based channel capacity for the synthetic waveguide operating with a low forwarding latency. The low latency channel capacity is far different from that predicted by traditional channel capacity. Next, a simple modulation called stuttered simulcast is introduced and shown to approach the performance of an optimal distributed space-time code. Finally, a Monte Carlo simulation of the cooperative diversity routing protocol confirms its superior performance in regions of operational interest.
Type
Thesis
Description
Series/Report No
Department
Electrical and Computer Engineering
Organization
Identifiers
NPS Report Number
Sponsors
Funding
Format
xvi, 77 p. : ill. (some col.) ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.