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    Item type:Publication,
    Delay time analysis of reconfigurable firewall unit
    (2011-12-01)
    Sato, Tomoaki
    ;
    Moungnoul, Phichet
    ;
    Fukase, Masa Aki
    A firewall function is indispensable for mobile devices and it demands low-power operations. To realize this demand, the authors have developed a firewall unit with a reconfigurable device. The firewall unit needs a large amount of register for the timing adjustment of packets. Using the registers is the cause of power consumption. In this paper, to solve the problem of power consumption, the firewall unit has developed by using wave-pipelining technique and detailed delay time for the technique is analyzed.
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    Development of a WiMAX processor by using a CPLD
    (2010-12-01)
    Sato, Tomoaki
    ;
    Moungnoul, Phichet
    ;
    Fukase, Masa Aki
    WiMAX (Worldwide Interoperability for Microwave Access) is one of the standards for high-speed wireless communications. The development cycle of a WiMAX processor is short because a transmission rate of a WiMAX system improves gradually. To keep using it even when the speed improves, there is a method of development that uses a processor that can be a reconfiguration of a circuits. In this paper, a mobile WiMAX processor by using a CPLD (Complex Programmable Logic Device) is proposed. Because wave-pipeline technique is used, the problem of processing speed is canceled. The authors evaluate wave-pipelined circuits which WiMAX processor needs on a CPLD. It is made clear that wave-pipeline technique is effective in the circuits on the CPLD.