A preceded multiuser OFDM (PMU-OFDM) transceiver for time asynchronous systems

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

*Corresponding author for this work

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

5 Scopus citations

Abstract

The performance of a multiuser OFDM transceiver, proposed by authors In [10] and called the preceded multiuser OFDM (PMU-OFDM) In this work, with time asynchronous access Is Investigated. We show that the multiaccess Interference (MAI) due to time asynchronous access can be reduced to a negligible amount by adopting a proper preceder that uses M/2 symmetric or M/2 anti-symmetric codewords of the M Hadamard-Walsh codes for the preceding task. The PMU-OFDM transceiver with the same preceder was shown to have approximately MAI-free property In a frequency asynchronous environment [11]. Here, we analyze the the approximately MAIfree property of the PMU-OFDM system with respect to time asynchronlsm. Finally, computer simulation Is performed to confirm the derived property.

Original languageEnglish
Title of host publicationGLOBECOM'05
Subtitle of host publicationIEEE Global Telecommunications Conference, 2005
Pages2214-2218
Number of pages5
DOIs
StatePublished - 28 Nov 2005
EventGLOBECOM'05: IEEE Global Telecommunications Conference, 2005 - St. Louis. MO, United States
Duration: 28 Nov 20052 Dec 2005

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference
Volume4

Conference

ConferenceGLOBECOM'05: IEEE Global Telecommunications Conference, 2005
CountryUnited States
CitySt. Louis. MO
Period28/11/052/12/05

Keywords

  • Code selection
  • MAI-free
  • Multiuser OFDM
  • Multiuser detection (MUD)
  • OFDMA
  • PMU-OFDM
  • Time offset

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