Abstract
Multi-user cooperative diversity is a recent technique promising great improvement of the performance of wireless communication systems operating in fading environments. Based on combinatorial optimization theory and specifically on the so-called knapsack problem, this paper presents a method of optimizing the selection among the potential cooperating users, when amplify-and-forward relays are used. In particular, two optimization problems are studied: the error probability minimization subject to total energy consumption constraints, and the dual one, the energy consumption minimization under error performance constraints. Depending on the frequency of repeating this selection, the above problems are categorized into shortterm and long-term node selection. Numerical examples verify the expected knapsack scheme's advantage of adapting the number of cooperating users, depending on the desired performance-consumption tradeoff. Moreover, long-term node selection seems to lead to similar error or consumption performance compared to the short-term one, despite its simplicity.
| Original language | English |
|---|---|
| Title of host publication | GLOBECOM - IEEE Global Telecommunications Conference |
| DOIs | |
| Publication status | Published - 2006 |
| Externally published | Yes |
| Event | IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference - San Francisco, CA, United States Duration: Nov 27 2006 → Dec 1 2006 |
Other
| Other | IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference |
|---|---|
| Country | United States |
| City | San Francisco, CA |
| Period | 11/27/06 → 12/1/06 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
An optimized user selection method for cooperative diversity systems. / Michalopoulos, Diomidis S.; Karagiannidis, George K.; Tsiftsis, Theodoros A.; Mallik, Ranjan K.
GLOBECOM - IEEE Global Telecommunications Conference. 2006. 4151483.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - An optimized user selection method for cooperative diversity systems
AU - Michalopoulos, Diomidis S.
AU - Karagiannidis, George K.
AU - Tsiftsis, Theodoros A.
AU - Mallik, Ranjan K.
PY - 2006
Y1 - 2006
N2 - Multi-user cooperative diversity is a recent technique promising great improvement of the performance of wireless communication systems operating in fading environments. Based on combinatorial optimization theory and specifically on the so-called knapsack problem, this paper presents a method of optimizing the selection among the potential cooperating users, when amplify-and-forward relays are used. In particular, two optimization problems are studied: the error probability minimization subject to total energy consumption constraints, and the dual one, the energy consumption minimization under error performance constraints. Depending on the frequency of repeating this selection, the above problems are categorized into shortterm and long-term node selection. Numerical examples verify the expected knapsack scheme's advantage of adapting the number of cooperating users, depending on the desired performance-consumption tradeoff. Moreover, long-term node selection seems to lead to similar error or consumption performance compared to the short-term one, despite its simplicity.
AB - Multi-user cooperative diversity is a recent technique promising great improvement of the performance of wireless communication systems operating in fading environments. Based on combinatorial optimization theory and specifically on the so-called knapsack problem, this paper presents a method of optimizing the selection among the potential cooperating users, when amplify-and-forward relays are used. In particular, two optimization problems are studied: the error probability minimization subject to total energy consumption constraints, and the dual one, the energy consumption minimization under error performance constraints. Depending on the frequency of repeating this selection, the above problems are categorized into shortterm and long-term node selection. Numerical examples verify the expected knapsack scheme's advantage of adapting the number of cooperating users, depending on the desired performance-consumption tradeoff. Moreover, long-term node selection seems to lead to similar error or consumption performance compared to the short-term one, despite its simplicity.
UR - http://www.scopus.com/inward/record.url?scp=50949086245&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=50949086245&partnerID=8YFLogxK
U2 - 10.1109/GLOCOM.2006.853
DO - 10.1109/GLOCOM.2006.853
M3 - Conference contribution
SN - 142440357X
SN - 9781424403578
BT - GLOBECOM - IEEE Global Telecommunications Conference
ER -