Performance of DS-CDMA with chip interleaving and frequency domain equalisation in a fading channel

D. Garg, F. Adachi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Conventional time domain rake combining can be replaced by minimum mean square error frequency domain equalisation (MMSE-FDE) with much better performance in a frequency-selective fading channel, since the frequency selectivity of the channel is thoroughly exploited. Chip interleaving is a form of channel interleaving that improves the DS-CDMA performance by taking advantage of the time selectivity of the channel. The combined effect of chip interleaving and MMSE-FDE is evaluated. The theoretical analysis of uncoded BER performance in a frequency-selective Rayleigh fading channel is presented and confirmed by computer simulations. It is found that chip interleaving improves the performance for all channel conditions and that the chip interleaving gain increases with the increase in spreading factor SF. In addition, it is shown by computer simulations that chip interleaving is beneficial in the presence of turbo coding and antenna diversity as well.

Original languageEnglish
Pages (from-to)757-764
Number of pages8
JournalIEE Proceedings: Communications
Volume152
Issue number6
DOIs
Publication statusPublished - 2005 Dec

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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