A Geometry-Inclusive Analysis for Single-Relay Systems
Successful message relay, or the quality of the interuser channel, is critical to fully realize the cooperative benefits promised by the theory. This in turn points out the importance of the geometry of cooperative system. This paper investigates the impact of the relay's location on the system...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2009-01-01
|
| Series: | International Journal of Digital Multimedia Broadcasting |
| Online Access: | http://dx.doi.org/10.1155/2009/146578 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Successful message relay, or the quality of the interuser channel, is critical to fully realize the
cooperative benefits promised by the theory. This in turn points out the importance of the geometry of
cooperative system. This paper investigates the impact of the relay's location on the system capacity and
outage probability for both amplify-forward (AF) and decode-forward (DF) schemes. Signal attenuation
is modeled using power laws, and capacity is evaluated using the max-flow min-cut theory. A capacity
contour for DF, the more popular mode of the two, is provided to facilitate the derivation of engineering
rules. Finally, a selective single-relay system, which selects the best relay node among a host of
candidates according to their locations, is analyzed. The average system capacity and outage, averaged
over all possible candidates' locations, are evaluated. The result shows that the availability of a small
candidate pool of 3 to 5 nodes suffices to reap most of the cooperative gains promised by a selective
single-relay system. |
|---|---|
| ISSN: | 1687-7578 1687-7586 |