Frequency-domain interchip interference cancelation for DS-CDMA downlink transmission

Kazuaki Takeda, Fumiyuki Adachi

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


The use of frequency-domain equalization (FDE) based on minimum-mean-square-error criterion can significantly improve the bit-error-rate (BER) performance of orthogonal multicode direct-sequence code-division multiple access downlink signal transmission in a frequency-selective fading channel. However, the presence of residual interchip interference (ICI) after FDE produces the orthogonality distortion among the spreading codes, and the BER performance degrades as the number of multiplex order increases. In this paper, we propose a frequency-domain ICI cancelation scheme, in which the residual ICI replica in the frequency domain is generated and subtracted from each frequency component of the received signal after FDE. Three types of ICI cancelation scheme are presented, and the effectiveness of the proposed ICI cancelation scheme is confirmed by computer simulation.

Original languageEnglish
Pages (from-to)1286-1294
Number of pages9
JournalIEEE Transactions on Vehicular Technology
Issue number3
Publication statusPublished - 2007 May
Externally publishedYes


  • Direct-sequence code-division multiple access (DS-CDMA)
  • Frequency-domain equalization (FDE)
  • Interchip-interference (ICI) cancelation

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics


Dive into the research topics of 'Frequency-domain interchip interference cancelation for DS-CDMA downlink transmission'. Together they form a unique fingerprint.

Cite this