Space-time coded adaptive transmit antenna arrays for OFDM wireless systems utilizing channel side information

Ya Han Pan, Khaled Letaief, Zhigang Cao

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

OFDM has been widely regarded as an effective modulation technique for mitigating the effects of ISI in a frequency selective fading channel and for providing reliable high-data transmission over wireless links. Adaptive antenna arrays at the transmitter can achieve further increases in system's capacity and bandwidth efficiency, as well as, in QoS improvement in conventional OFDM systems. But the performance of such of systems will severely degrade as the quality of the channel information available at the transmitter decreases. In this paper, we propose a space-time block coded adaptive transmit antenna arrays for broadband OFDM communication systems by utilizing partial channel side information. By employing space-time coding and adaptive power assignment between the sub-channels obtained by applying an Eigenvalue Decomposition on the conditional channel correlation matrix of each sub-carrier, the proposed system combines the benefits of both space-time block coding and adaptive antenna arrays while being robust to channel imperfection. Simulation results show that the proposed system yields significant gains over conventional adaptive antenna arrays based systems without space-time coding under imperfect channel information available at the transmitter. Simulation results also show that the proposed power allocation in the frequency domain can further improve the performance of the space-time block coded adaptive transmit antenna arrays based OFDM system.

Original languageEnglish
Pages (from-to)1127-1131
Number of pages5
JournalIEEE Vehicular Technology Conference
Volume57
Issue number2
Publication statusPublished - 2003
Externally publishedYes

Fingerprint

Smart antennas
Side Information
Antenna Arrays
Orthogonal Frequency Division multiplexing (OFDM)
Orthogonal frequency division multiplexing
Space-time
Transmitters
Transmitter
Coding
Space-time block coding (STBC)
Frequency selective fading
Eigenvalue Decomposition
Fading channels
Data communication systems
Telecommunication links
Quality of service
Communication systems
Correlation Matrix
Power Allocation
Imperfections

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Space-time coded adaptive transmit antenna arrays for OFDM wireless systems utilizing channel side information. / Pan, Ya Han; Letaief, Khaled; Cao, Zhigang.

In: IEEE Vehicular Technology Conference, Vol. 57, No. 2, 2003, p. 1127-1131.

Research output: Contribution to journalArticle

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