A receive space diversity architecture for OFDM systems using orthogonal designs

Defeng Huang, Khaled Letaief, Jianhua Lu

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In wireless communications, multiple receive antennas can be used with orthogonal frequency division multiplexing (OFDM) to significantly improve system capacity and performance. However, the complexity of such combination can be very large because multiple discrete Fourier transform (DFT) blocks, each for one receive antenna, are required to fully take advantage of the space diversity. In this paper, based on orthogonal designs, we present a general receiver architecture for an OFDM system employing multiple receive antennas. Using the proposed architecture, the number of DFT blocks, the number of receive antennas and system performance can be effectively traded off. As a result, with a little performance degradation, one can reduce system complexity and consequently reduce the power consumption in the receivers. The proposed receivers can also be featured as a performance enhancing scheme for an existing OFDM system where performance improvement is achieved through the use of software radio and without major modifications to the existing system hardware. For example, with only one DFT block, the performance can be improved by 5.1 dB using one more antenna. Finally, it is shown that the proposed scheme exhibits superior performance to that of selection diversity especially when the channels are rich in frequency diversity.

Original languageEnglish
Pages (from-to)992-1002
Number of pages11
JournalIEEE Transactions on Wireless Communications
Volume3
Issue number3
DOIs
Publication statusPublished - May 2004
Externally publishedYes

Fingerprint

Orthogonal Design
Orthogonal Frequency Division multiplexing (OFDM)
Orthogonal frequency division multiplexing
System Design
Antennas
Discrete Fourier transforms
Discrete Fourier transform
Antenna
Receiver
Multiple Antennas
Software radio
Wireless Communication
Electric power utilization
Power Consumption
Architecture
System Performance
Degradation
Hardware
Communication
Software

Keywords

  • Orthogonal designs
  • Orthogonal frequency division multiplexing (OFDM)
  • Software radio
  • Space diversity

ASJC Scopus subject areas

  • Engineering(all)
  • Computer Networks and Communications

Cite this

A receive space diversity architecture for OFDM systems using orthogonal designs. / Huang, Defeng; Letaief, Khaled; Lu, Jianhua.

In: IEEE Transactions on Wireless Communications, Vol. 3, No. 3, 05.2004, p. 992-1002.

Research output: Contribution to journalArticle

@article{846416b6ad1c42619d7801ec9a8c0942,
title = "A receive space diversity architecture for OFDM systems using orthogonal designs",
abstract = "In wireless communications, multiple receive antennas can be used with orthogonal frequency division multiplexing (OFDM) to significantly improve system capacity and performance. However, the complexity of such combination can be very large because multiple discrete Fourier transform (DFT) blocks, each for one receive antenna, are required to fully take advantage of the space diversity. In this paper, based on orthogonal designs, we present a general receiver architecture for an OFDM system employing multiple receive antennas. Using the proposed architecture, the number of DFT blocks, the number of receive antennas and system performance can be effectively traded off. As a result, with a little performance degradation, one can reduce system complexity and consequently reduce the power consumption in the receivers. The proposed receivers can also be featured as a performance enhancing scheme for an existing OFDM system where performance improvement is achieved through the use of software radio and without major modifications to the existing system hardware. For example, with only one DFT block, the performance can be improved by 5.1 dB using one more antenna. Finally, it is shown that the proposed scheme exhibits superior performance to that of selection diversity especially when the channels are rich in frequency diversity.",
keywords = "Orthogonal designs, Orthogonal frequency division multiplexing (OFDM), Software radio, Space diversity",
author = "Defeng Huang and Khaled Letaief and Jianhua Lu",
year = "2004",
month = "5",
doi = "10.1109/TWC.2004.827764",
language = "English",
volume = "3",
pages = "992--1002",
journal = "IEEE Transactions on Wireless Communications",
issn = "1536-1276",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

TY - JOUR

T1 - A receive space diversity architecture for OFDM systems using orthogonal designs

AU - Huang, Defeng

AU - Letaief, Khaled

AU - Lu, Jianhua

PY - 2004/5

Y1 - 2004/5

N2 - In wireless communications, multiple receive antennas can be used with orthogonal frequency division multiplexing (OFDM) to significantly improve system capacity and performance. However, the complexity of such combination can be very large because multiple discrete Fourier transform (DFT) blocks, each for one receive antenna, are required to fully take advantage of the space diversity. In this paper, based on orthogonal designs, we present a general receiver architecture for an OFDM system employing multiple receive antennas. Using the proposed architecture, the number of DFT blocks, the number of receive antennas and system performance can be effectively traded off. As a result, with a little performance degradation, one can reduce system complexity and consequently reduce the power consumption in the receivers. The proposed receivers can also be featured as a performance enhancing scheme for an existing OFDM system where performance improvement is achieved through the use of software radio and without major modifications to the existing system hardware. For example, with only one DFT block, the performance can be improved by 5.1 dB using one more antenna. Finally, it is shown that the proposed scheme exhibits superior performance to that of selection diversity especially when the channels are rich in frequency diversity.

AB - In wireless communications, multiple receive antennas can be used with orthogonal frequency division multiplexing (OFDM) to significantly improve system capacity and performance. However, the complexity of such combination can be very large because multiple discrete Fourier transform (DFT) blocks, each for one receive antenna, are required to fully take advantage of the space diversity. In this paper, based on orthogonal designs, we present a general receiver architecture for an OFDM system employing multiple receive antennas. Using the proposed architecture, the number of DFT blocks, the number of receive antennas and system performance can be effectively traded off. As a result, with a little performance degradation, one can reduce system complexity and consequently reduce the power consumption in the receivers. The proposed receivers can also be featured as a performance enhancing scheme for an existing OFDM system where performance improvement is achieved through the use of software radio and without major modifications to the existing system hardware. For example, with only one DFT block, the performance can be improved by 5.1 dB using one more antenna. Finally, it is shown that the proposed scheme exhibits superior performance to that of selection diversity especially when the channels are rich in frequency diversity.

KW - Orthogonal designs

KW - Orthogonal frequency division multiplexing (OFDM)

KW - Software radio

KW - Space diversity

UR - http://www.scopus.com/inward/record.url?scp=2542472391&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2542472391&partnerID=8YFLogxK

U2 - 10.1109/TWC.2004.827764

DO - 10.1109/TWC.2004.827764

M3 - Article

VL - 3

SP - 992

EP - 1002

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

SN - 1536-1276

IS - 3

ER -