Pre-DFT processing for coded OFDM systems with receive space diversity

Defeng Huang, Khaled Letaief

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

3 Citations (Scopus)

Abstract

Coded orthogonal division multiplexing (OFDM) is an enabling technology for broadband wireless communications. Multiple receive antennas can be employed in OFDM systems to achieve space diversity and thus significantly improve system performance. Conventionally, sub-carrier based space combining is used in such systems and the complexity can be huge because multiple DFT blocks, each for one receive antenna, are needed. In this paper, a pre-DFT processing technique based upon eigen-analysis, which can be employed in coded OFDM systems to effectively trade off system performance and complexity, is presented. For coherent modulation and without performance loss compared with the conventional scheme, it is shown that the number of DFT blocks required is the minimum of the number of receive antennas and the number of distinct paths in the channel. For differential modulation and with a smaller number of DFT blocks, simulation results show that the performance can even be better than that of the conventional scheme.

Original languageEnglish
Title of host publication2003 IEEE Wireless Communications and Networking Conference, WCNC 2003
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3-8
Number of pages6
Volume1
ISBN (Electronic)0780377001
DOIs
Publication statusPublished - 2003
Externally publishedYes
Event2003 IEEE Wireless Communications and Networking Conference: The Dawn of Pervasive Communication, WCNC 2003 - New Orleans, United States
Duration: 16 Mar 200320 Mar 2003

Other

Other2003 IEEE Wireless Communications and Networking Conference: The Dawn of Pervasive Communication, WCNC 2003
CountryUnited States
CityNew Orleans
Period16/3/0320/3/03

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Huang, D., & Letaief, K. (2003). Pre-DFT processing for coded OFDM systems with receive space diversity. In 2003 IEEE Wireless Communications and Networking Conference, WCNC 2003 (Vol. 1, pp. 3-8). [1200310] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WCNC.2003.1200310