A Study on Multi-User Interference Cancellers for Synchronous Optical CDMA Systems — Decision Distance and Bit Error Rate —

• MATSUSHIMA Tomoko K.

  Polytechnic University

• KAKUYAMA Masaki

  Polytechnic University

• MURATA Yuya

  Tokyo Institute of Technology

• TERAMACHI Yasuaki

  Polytechnic University

• YAMASAKI Shoichiro

  Polytechnic University

Abstract

Several kinds of techniques for excellent multi-user interference (MUI) cancellation have been proposed for direct-detection synchronous optical code division multiple access (OCDMA) systems. All these techniques utilize modified prime sequence codes (MPSCs) as signature codes and can remove MUI errors efficiently. In this paper, the features of three typical MUI cancellers are studied and compared in detail. The authors defined the parameter “decision distance” to show the feature of MUI cancellers. The bit error rate performance of each canceller is investigated by computer simulation and compared with that of the basic on-off keying (OOK) scheme without cancellation. Then, we investigate the relationship between the decision distance and the bit error rate performance. It is shown that every canceller has a better bit error rate performance than the basic OOK scheme. Especially, the equal weight orthogonal (EWO) scheme, whose decision distance is the largest, has the best error resistance property of the three MUI cancellers. The results show that the decision distance is a useful index to evaluate the error resistance property of MUI cancellation schemes.

Journal

• IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences

  IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E100.A (10), 2135-2145, 2017

  The Institute of Electronics, Information and Communication Engineers

Keywords

• optical CDMA
• modified prime sequence code (MPSC)
• multi-user interference (MUI)
• interference canceller
• decision distance

Details

• CRID: 1390001206312056960
• NII Article ID: 130006109883
• DOI: 10.1587/transfun.e100.a.2135
• ISSN: 17451337
• ISSN: 09168508
• Web Site: https://www.jstage.jst.go.jp/article/transfun/E100.A/10/E100.A_2135/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed