Joint frequency-domain differential detection and equalization for 2-dimensional spread/chip-interleaved DS-CDMA uplink transmissions

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

Abstract

The multiple-access interference (MAI) limits the performance of the DS-CDMA uplink transmission. 2 dimensional (2D) spread/chip-interleaved DS-CDMA is an MAI-free system, where single-user coherent frequency-domain equalization (FDE) can be used instead of complicated multiuser detection (MUD). However, coherent FDE needs channel estimation. Pilot-assisted channel estimation is not reliable in a fast fading environment. In this paper, we apply joint frequency-domain differential detection and equalization (FDDDE) that requires no channel estimation to 2D spread/chip-interleaved DS-CDMA in a multiuser/multipath environment. The filter coefficient used in FDDDE is updated by estimating the normalized Doppler frequency. Computer simulation results show that 2D spread/chip-interleaved DS-CDMA using FDDDE is robust against fast fading.

Original languageEnglish
Title of host publication2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
Pages1768-1772
Number of pages5
DOIs
Publication statusPublished - 2006
Event2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall - Montreal, QC, Canada
Duration: 2006 Sept 252006 Sept 28

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252

Conference

Conference2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
Country/TerritoryCanada
CityMontreal, QC
Period06/9/2506/9/28

Keywords

  • 2-dimensional spreading
  • Chip interleaving
  • Differential detection
  • DS-CDMA uplink transmission

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