MIMO relay selection with suboptimal power allocation transmission over cooperative communication networks

Yi Sian Wu*, Chia Hung Yeh, Wen Yu Tseng, Wan Jen Huang, Min Kuan Chang, Ruey Nan Yeh, Chiu Lan Chu, Po Yi Sung

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationSecurity-Enriched Urban Computing and Smart Grid - Second International Conference, SUComS 2011, Proceedings
Pages203-211
Number of pages9
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event2nd International Conference on the Emerging Areas of Security-Enriched Urban Computing and Smart Grids, SUComS 2011 - Hualien, Taiwan
Duration: 2011 Sep 212011 Sep 23

Publication series

NameCommunications in Computer and Information Science
Volume223 CCIS
ISSN (Print)1865-0929

Conference

Conference2nd International Conference on the Emerging Areas of Security-Enriched Urban Computing and Smart Grids, SUComS 2011
Country/TerritoryTaiwan
CityHualien
Period2011/09/212011/09/23

Keywords

  • amplify-and-forward (AF)
  • cooperative relay networks
  • MIMO relay
  • power allocation
  • relay selection

ASJC Scopus subject areas

  • Computer Science(all)
  • Mathematics(all)

Fingerprint

Dive into the research topics of 'MIMO relay selection with suboptimal power allocation transmission over cooperative communication networks'. Together they form a unique fingerprint.

Cite this