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Author: search.filters.author.Choomchuay, S.

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    A concatenate code for error correcting code in bit pattern media recoding system
    (2013-11-15)
    Timakul, S.
    ;
    Koonkarnkhai, S.
    ;
    Kovintavewat, P.
    ;
    Choomchuay, S.
    Bit Pattern Media Recording (BPMR) is the modern HDD recording technique which can overcome the constraint of conventional technique by offering tremendous areal density. However, narrow track of BPMR can cause noise generating from inter-track interference (ITI) and In. inter-symbol interference (ISI). One traditional technique used to improve BER of the system is the introducing of error control coding. In this paper, we investigate concatenate code applied to BPMR. We proposed inner code with low-density parity-check (LDPC) and Reed-Solomon (RS) codes as outer code. The obtained simulation results confirmed to us that the concatenated coding scheme yielded better performance compared with the single LDPC code deployment. © (2014) Trans Tech Publications, Switzerland.
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    A 32 bits architecture for an AES system
    (2004-12-01)
    Pongyupinpanich, S.
    ;
    Phathumvanh, S.
    ;
    Choomchuay, S.
    This paper describes a compact 32 bits architecture developed for the Rijndael ciphering/decyphering system. The implementation is complied with NIST Advanced Encryption standard. The design processes 128-bit block data with 128-bit key. For the area-saving implementation, the field inversion block and the key scheduling circuits are shared by both the encryption and decryption process.