Reduction of MAI in asynchronous DS/CDMA systems using post-filter

Yutaka Jitsumatsu, Tahir Abbas Khan, Tohru Kohda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We propose a post-filter (digital filter applied after the correlator) to reduce multiple-access interference (MAI) in the correlator output in asynchronous communications. Optimum filter coefficients are derived for Markov and i.i.d. codes. It is shown that post-filter is not needed for Markov case. Variance of MAI is reduced in i.i.d. codes and it becomes equal to that of Markov codes; thus, both will have the same bit error rate (BER) performance. This post-filter reduces level of MAI in the correlator output for Gold codes as well.

Original languageEnglish
Pages (from-to)2301-2307
Number of pages7
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Issue number9
Publication statusPublished - Sept 2004

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Applied Mathematics
  • Electrical and Electronic Engineering
  • Computer Graphics and Computer-Aided Design


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