Reduction of MAI in Asynchronous DS/CDMA Systems Using Post-Filter

• JITSUMATSU Yutaka

  Department of Computer Science and Communication Engineering, Kyushu University

• KHAN Tahir ABBAS

  Department of Computer Science and Communication Engineering, Kyushu University

• KOHDA Tohru

  Department of Computer Science and Communication Engineering, Kyushu University

抄録

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.

収録刊行物

• IEICE transactions on fundamentals of electronics, communications and computer sciences

  IEICE transactions on fundamentals of electronics, communications and computer sciences 87 (9), 2301-2307, 2004-09-01

  一般社団法人電子情報通信学会

キーワード

• Markovian SS codes
• i. i. d. codes
• MAI reduction filter
• asynchronous DS
• CDMA systems

詳細情報

• CRID: 1571698602418846720
• NII論文ID: 110003213176
• NII書誌ID: AA10826239
• ISSN: 09168508
• 本文言語コード: en
• データソース種別:
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