Enhanced performance for an approximately M AI-free multiaccess OFDM transceiver by code selection

Shang-Ho Tsai*, Yuan-Pei Lin, C. C. Jay Kuo

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations

Abstract

A new code selection scheme is proposed to reduce the MAI of an approximately MAI-free OFDM transceiver that is known as the repetitively coded multi-carrier CDMA (RCMC-CDMA) in this work. That is, if we use M/2 symmetric codewords or anti-symmetric codewords of the M Hadamard-Walsh codes, the MAI of the system can be greatly reduced. With this code selection scheme, the requirement of a sufficiently large number of subchannels to achieve the MAI-free property can be relaxed so that the approximately MAI-free property still holds when the number of subchannels is relatively small.

Original languageEnglish
Pages (from-to)4335-4339
Number of pages5
JournalIEEE Vehicular Technology Conference
Volume60
Issue number6
DOIs
StatePublished - 1 Dec 2004
Event2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States
Duration: 26 Sep 200429 Sep 2004

Keywords

  • Codeword selection
  • MAI-free
  • Multiaccess OFDM
  • OFDMA
  • RCMC-CDMA

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