Transmission schemes based on sum rate analysis in distributed antenna systems

Heejin Kim, Sang Rim Lee, Kyoung Jae Lee, Inkyu Lee

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

In this paper, we study single cell multi-user downlink distributed antenna systems (DAS) where antenna ports are geographically separated in a cell. First, we derive an expression of the ergodic sum rate for the DAS in the presence of pathloss. Then, we propose a transmission selection scheme based on the derived expressions which does not require channel state information at the transmitter. Utilizing the knowledge of distance information from a user to each distributed antenna (DA) port, we consider the optimization of pairings of DA ports and users to maximize the system performance. Based on the ergodic sum rate expressions, the proposed scheme chooses the best mode maximizing the ergodic sum rate among mode candidates. In our proposed scheme, the number of mode candidates are greatly reduced compared to that of ideal mode selection. In addition, we analyze the signal to noise ratio cross-over point for different modes using the sum rate expressions. Through Monte Carlo simulations, we show the accuracy of our derivations for the ergodic sum rate. Moreover, simulation results with the pathloss modeling confirm that the proposed scheme produces the average sum rate identical to the ideal mode selection with significantly reduced candidates.

Original languageEnglish
Article number6138838
Pages (from-to)1201-1209
Number of pages9
JournalIEEE Transactions on Wireless Communications
Volume11
Issue number3
DOIs
Publication statusPublished - 2012 Mar 1

Fingerprint

Antenna
Antennas
Path Loss
Channel state information
Cell
Channel State Information
Transmitters
Signal to noise ratio
Pairing
Transmitter
Crossover
System Performance
Monte Carlo Simulation
Choose
Maximise
Optimization
Modeling
Simulation

Keywords

  • distributed antenna systems (DAS)
  • multi-user
  • Sum rate

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

Cite this

Transmission schemes based on sum rate analysis in distributed antenna systems. / Kim, Heejin; Lee, Sang Rim; Lee, Kyoung Jae; Lee, Inkyu.

In: IEEE Transactions on Wireless Communications, Vol. 11, No. 3, 6138838, 01.03.2012, p. 1201-1209.

Research output: Contribution to journalArticle

Kim, Heejin ; Lee, Sang Rim ; Lee, Kyoung Jae ; Lee, Inkyu. / Transmission schemes based on sum rate analysis in distributed antenna systems. In: IEEE Transactions on Wireless Communications. 2012 ; Vol. 11, No. 3. pp. 1201-1209.
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