Performance analysis of transmit diversity systems with multiple antenna replacement

Ki Hong Park*, Young Chai Ko, Hong Chuan Yang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

There are usually rate loss and power spreading effects associated with transmit diversity systems based on orthogonal space-time block coding (OSTBC). Proper antenna selection scheme can help more effectively utilize the transmit antenna and transmission power in such systems. In this paper, we propose a new antenna selection scheme for such systems based on the idea of antenna switching. In particular, targeting at reducing the number of pilot channels and RF chains, the transmitter now replaces the antennas with the lowest received SNR with unused ones if the output SNR of space time decoder at the receiver is below a certain threshold. With this new scheme, not only the number of pilot channels and RF chains to be implemented is decreased, the average amount of information feedback is also reduced. To analyze the performance of this scheme, we derive the exact integral form expression for the probability density function (PDF) of the received SNR. We show through numerical examples that the proposed scheme offers better performance than traditional OSTBC systems using all available transmitting antenna, with a small amount of information feedback. We also examine the effect of different antenna configuration and feedback delay.

Original languageEnglish (US)
Title of host publicationProceedings of 4th IEEE Internatilonal Symposium on Wireless Communication Systems 2007, ISWCS
Pages302-307
Number of pages6
DOIs
StatePublished - 2007
Externally publishedYes
Event4th IEEE International Symposium on Wireless Communication Systems 2007, ISWCS'07 - Trondheim, Norway
Duration: Oct 16 2007Oct 19 2007

Other

Other4th IEEE International Symposium on Wireless Communication Systems 2007, ISWCS'07
CountryNorway
CityTrondheim
Period10/16/0710/19/07

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Communication

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