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An FPGA-based text search engine for approximate regular expression matching

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3 Author(s)
Utan, Y. ; Grad. Sch. of Inf. Sci., Hiroshima City Univ., Hiroshima, Japan ; Wakabayashi, S. ; Nagayama, S.

Text search is a procedure to find occurrences of a pattern in a given text where the pattern and each occurrence may have a limited number of differences. Text search is an indispensable technique for bibliographic databases. In this paper, a restricted class of regular expressions is used as patterns, and all substrings in a text that are close to a pattern, possibly with some errors, are located. We call this text search problem approximate regular expression matching. For this problem, a one-dimensional systolic algorithm is presented based on dynamic programming. Experiments show that the proposed hardware engine implemented on FPGA realizes high-speed text search.

Published in:

Field-Programmable Technology (FPT), 2010 International Conference on

Date of Conference:

8-10 Dec. 2010

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