Channel estimation filter using time-multiplexed pilot channel for coherent RAKE combining in DS-CDMA mobile radio

Hidehiro Andoh, Mamoru Sawahashi, Fumiyuki Adachi

Research output: Contribution to journalArticlepeer-review

105 Citations (Scopus)

Abstract

An improved pilot symbol-assisted channel estimation filter, called the weighted multi-slot averaging (WMSA) channel estimation filter, is presented for DS-CDMA transmission links using coherent RAKE combining. Known pilot symbols are periodically time-multiplexed with the sequence of transmitted data symbols; they are placed at the beginning of each data slot. The WMSA channel estimation filter extends the observation interval over several slots. The average bit error rate (BER) performance achievable with coherent RAKE combining using the proposed WMSA channel estimation filter is evaluated by computer simulations in a frequency selective multipath Rayleigh fading channel and the results are compared with those achievable with the use of other channel estimation filters such as an interpolation filter. The DS-CDMA reverse link requires fast transmit power control (TPC). In this paper, we also consider fast TPC based on the measurement of signal-to-interference plus background noise ratio (SIR). The average BER performance with the time-multiplexed pilot channel is also compared with that with the parallel pilot channel.

Original languageEnglish
Pages (from-to)1517-1525
Number of pages9
JournalIEICE Transactions on Communications
VolumeE81-B
Issue number7
Publication statusPublished - 1998 Jan 1
Externally publishedYes

Keywords

  • Channel estimation
  • DS-CDMA
  • Mobile radio
  • RAKE combining

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Channel estimation filter using time-multiplexed pilot channel for coherent RAKE combining in DS-CDMA mobile radio'. Together they form a unique fingerprint.

Cite this