Pilot-assisted channel estimation for frequency-domain equalization of DSSS signals

Koichi Ishihara, Kazuaki Takeda, Fumiyuki Adachi

Research output: Contribution to journalConference articlepeer-review


As the channel frequency selectivity becomes severer, the bit error rate (BER) performance of direct sequence spread spectrum (DSSS) with rake combining degrades due to increasing inter-path interference. Frequency-domain equalization (FDE) can replace rake combining with much improved BER performance in a severe frequency-selective fading channel. For FDE, accurate estimation of the channel transfer function is required. In this paper, we propose a pilot-assisted iterative channel estimation that uses a pilot which is time-multiplexed within each chip block for fast Fourier transform (FFT). The pilot acts as a cyclic-prefix of FFT block as well The achievable BER performance is evaluated by computer simulation.

Original languageEnglish
Pages (from-to)783-787
Number of pages5
JournalIEEE Vehicular Technology Conference
Issue number2
Publication statusPublished - 2005 Oct 17
Event2005 IEEE 61st Vehicular Technology Conference -VTC 2005 - Spring Stockholm: Paving the Path for a Wireless Future - Stockholm, Sweden
Duration: 2005 May 302005 Jun 1


  • Channel estimation
  • DSSS
  • Frequency-domain equalization

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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