TY - GEN
T1 - MIMO relay selection with suboptimal power allocation transmission over cooperative communication networks
AU - Wu, Yi Sian
AU - Yeh, Chia Hung
AU - Tseng, Wen Yu
AU - Huang, Wan Jen
AU - Chang, Min Kuan
AU - Yeh, Ruey Nan
AU - Chu, Chiu Lan
AU - Sung, Po Yi
PY - 2011
Y1 - 2011
N2 - In order to enhance the relay's performance, and use the resource efficiently, a multiple input multiple output (MIMO) relay selection scheme based on amplify-and-forward (AF) cooperative system is proposed. In this paper, we consider the diversity combining at MIMO relays, and provide a condition to maximize the overall output signal-to-noise ratio (SNR). In this condition, the ineffective relays will be excluded in sequence from the cooperation; therefore the unused relays can be reallocated to other users. In the proposed system model, we use the maximal ratio combining (MRC) at MIMO relay, and employ the best channels from each relay to the destination. Each relay transmits the signal with identical power; meanwhile, the total power allocated to the source and the selected relays is set by suboptimal distribution. Simulation results indicate that the effect of bit error rate (BER) through the relay selection is similar to the scheme which applies all relays, but the amounts of used relay decreased. And the proposed MIMO relay scheme is superior to the single input single output (SISO) one about 7dB. Therefore, the relay resource could be used more efficiently than we employ all relay. In addition, the MIMO relay scheme can enhance the relay's performance.
AB - In order to enhance the relay's performance, and use the resource efficiently, a multiple input multiple output (MIMO) relay selection scheme based on amplify-and-forward (AF) cooperative system is proposed. In this paper, we consider the diversity combining at MIMO relays, and provide a condition to maximize the overall output signal-to-noise ratio (SNR). In this condition, the ineffective relays will be excluded in sequence from the cooperation; therefore the unused relays can be reallocated to other users. In the proposed system model, we use the maximal ratio combining (MRC) at MIMO relay, and employ the best channels from each relay to the destination. Each relay transmits the signal with identical power; meanwhile, the total power allocated to the source and the selected relays is set by suboptimal distribution. Simulation results indicate that the effect of bit error rate (BER) through the relay selection is similar to the scheme which applies all relays, but the amounts of used relay decreased. And the proposed MIMO relay scheme is superior to the single input single output (SISO) one about 7dB. Therefore, the relay resource could be used more efficiently than we employ all relay. In addition, the MIMO relay scheme can enhance the relay's performance.
KW - MIMO relay
KW - amplify-and-forward (AF)
KW - cooperative relay networks
KW - power allocation
KW - relay selection
UR - http://www.scopus.com/inward/record.url?scp=80655142477&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80655142477&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-23948-9_23
DO - 10.1007/978-3-642-23948-9_23
M3 - Conference contribution
AN - SCOPUS:80655142477
SN - 9783642239472
T3 - Communications in Computer and Information Science
SP - 203
EP - 211
BT - Security-Enriched Urban Computing and Smart Grid - Second International Conference, SUComS 2011, Proceedings
T2 - 2nd International Conference on the Emerging Areas of Security-Enriched Urban Computing and Smart Grids, SUComS 2011
Y2 - 21 September 2011 through 23 September 2011
ER -