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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
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2018/01/01
Online ISSN: 1745-1337
Type of Manuscript: Special Section LETTER (Special Section on Wideband Systems)
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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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=2z. 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.