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A new method of evaluating the interference to a wireless LAN with a built-in antenna using a gigahertz transverse electromagnetic (GTEM) cell is proposed. The GTEM cell can generate a wideband electromagnetic field from dc up to several gigahertz with a high spatial uniformity in the cell. This is advantageous for configuring a system for a victim receiver with a built-in antenna. Furthermore, the...
We introduce two approaches for power saving routers, which are the power efficient designing and the power saving designing. Power efficient designing enables a high performance router at low power consumption. As a part of power efficient designing, we have integrated ASICs/FPGAs of routers and developed a scalable central architecture. Additionally, we used new high speed memories and high speed...
A new method for experimentally simulating the interference between UWB (ultra wideband) and WLAN (wireless LAN) systems is presented. The method employs a GTEM (gigahertz transverse electromagnetic) cell, which is usually used for EMC testing at microwave frequencies, to generate a uniform electromagnetic field with a wideband interfering signal. The method has the following advantages: 1) The evaluation...
In this paper, future requirements we believe that will be needed for achieving power efficient routers are shown. The optical backplane is a proposal technology we are working on, which enables a high-speed and power efficient data transmission in backplane of routers and switches, by connecting the electronic devices together with optical paths. It is effective for edge routers and switches which...
We worked on the physical layer model for implementing the optical DQPSK transmission function. In order to enable a high speed DQPSK transmission, a signal multiplexing and de-multiplexing module was needed. The multiplexing and de-multiplexing module exchanges a high frequency 2bit width data signal and a low frequency wide width data signal into each other. For creating such modules, the channel...
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