Atsushi Honda

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This paper describes experimental results of an antenna selection system that is applied to a receiver side of multiple-input multiple-output (MIMO) systems. We proposed an antenna selection system that each MIMO receive branch has different polarization and directional pattern antennas and selects one antenna combination by using radio frequency micro(More)
SUMMARY The combination of Multiple-Input Multiple-Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) technologies gives wireless communications systems the advantages of lower bit error rate (BER) and higher data rate in frequency-selective fading environments. However, the main drawbacks of MIMO systems are their high complexity and high(More)
Recently more embedded terminals have begun to use a general-purpose OS such as Linux. These terminals can perform various functions, such as downloading applications. Since these applications maybe malicious, it is necessary to protect terminals against them and to ensure stability of services provided by the terminals. We have proposed a security enhanced(More)