Construction of optical ZCZ code generators with the smallest zero correlation zone

  • Authors:

  • Takahiro Matsumoto;Shinya Matsufuji

  • Affiliations:

  • Yamaguchi University, Graduate School of Science and Engineering, Ube, Yamaguchi, Japan;Yamaguchi University, Graduate School of Science and Engineering, Ube, Yamaguchi, Japan

  • Venue:
  • AIC'10/BEBI'10 Proceedings of the 10th WSEAS international conference on applied informatics and communications, and 3rd WSEAS international conference on Biomedical electronics and biomedical informatics
  • Year:
  • 2010

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Abstract

In this paper, we propose the construction of two code generators for an optical ZCZ code of length N = 2n, family size M = N/2-2 and zero correlation zone 1, which are called ROM-type and non ROM-type code generators. The optical ZCZ code is a set of pairs of binary and bi-phase sequences with zero correlation zone. An optical code division multiple access (CDMA) system using this code can remove co-channel interference and influence of multi-path. This ROM-type code generator can be constructed by a ROM and an up-counter. Similarly, this non ROM-type code generator can be constructed by an up-counter and logic gates. The ROM-type and non ROM-type code generators are implemented on a field programmable gate array (FPGA) corresponding to 400; 000 logic gates, and the non ROM-type code generator can reduce logic elements than the ROM-type code generator.