A Compact Matched Filter Bank for an Optical ZCZ Sequence Set with Zero-Correlation Zone 2z

Yasuaki OHIRA; Takahiro MATSUMOTO; Hideyuki TORII; Yuta IDA; Shinya MATSUFUJI

doi:10.1587/transfun.E101.A.195

Special Section on Wideband Systems

A Compact Matched Filter Bank for an Optical ZCZ Sequence Set with Zero-Correlation Zone 2^z

Yasuaki OHIRA, Takahiro MATSUMOTO, Hideyuki TORII, Yuta IDA, Shinya MATSUFUJI

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Keywords: optical communication, optical M-ary spread spectrum (M-ary/SS) system, optical zero-correlation zone (ZCZ) sequence, matched filter bank (MFB), field-programmable gate array (FPGA)

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2018 Volume E101.A Issue 1 Pages 195-198

DOI https://doi.org/10.1587/transfun.E101.A.195

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Abstract

In this paper, we propose a new structure for a compact matched filter bank (MFB) for an optical zero-correlation zone (ZCZ) sequence set with Zcz=2^z. The proposed MFB can reduces operation elements such as 2-input adders and delay elements. The number of 2-input adders decrease from O(N²) to O(N log₂ N), delay elements decrease from O(N²) to O(N). In addition, the proposed MFBs for the sequence of length 32, 64, 128 and 256 with Zcz=2,4 and 8 are implemented on a field programmable gate array (FPGA). As a result, the numbers of logic elements (LEs) of the proposed MFBs for the sequences with Zcz=2 of length 32, 64, 128 and 256 are suppressed to about 76.2%, 84.2%, 89.7% and 93.4% compared to that of the conventional MFBs, respectively.

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