Adaptive channel estimation for coherent DS-CDMA mobile radio using time-multiplexed pilot and parallel pilot structures

Sadayuki Abeta, Mamoru Sawahashi, Fumiyuki Adachi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Adaptive channel estimation filters are presented for coherent DS-CDMA reverse link using time-multiplexed pilot and parallel pilot structures. Fast transmit power control (TPC) is adopted in the reverse link. Fading statistical properties are not preserved when fast TPC is used. When fading is slow, the channel is similar to non-fading channel, but its starts to vary as fading become faster since fast TPC cannot track fading perfectly. A pragmatic approach is used in this paper to derive adaptive channel estimation filter. The filter coefficients are updated based on the measured autocorrelation function of the instantaneous channel estimate. The bit error rate (BER) performance under frequency selective Rayleigh fading is evaluated by computer simulation to show that the adaptive channel estimation filter provides superior performance to the previously proposed non-adaptive WMSA filter.

Original languageEnglish
Pages (from-to)1505-1512
Number of pages8
JournalIEICE Transactions on Communications
VolumeE82-B
Issue number9
Publication statusPublished - 1999 Jan 1
Externally publishedYes

Keywords

  • Adaptive channel estimation
  • Coherent RAKE
  • DS-CDMA
  • Pilot channel

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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