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This paper proposes WDM (Wavelength Division Multiplexing) optical power allocation method with consideration of the OMI (Optical Modulation Index) to achieve each different CNDR (Carrier to Noise-plus-Distortion Ratio) of wireless services under total optical transmission power limitation for adaptive RoFSO (Radio on Free Space Optics) system design. The validity of the proposed method is shown by...
This paper describes on application of Radio-on-Fiber, for the digital divide solution by utilizing CATV optical fiber network. We have been demonstrated RoF repeater system for heterogeneous wireless infrastructure by using indoor experiment, however field trial is required. Now, the radiation inspection have been done as an experiment bureau in the mountainous area at the Nosegawa village in Nara...
Recently, multi-antenna technology is used in almost new radio communication technology such as MIMO (multiple-input multiple-output). The centralized signal processing is one of features of the Radio-on-Fiber distributed antenna application. This paper proposes a link quality based antenna selection in Radio-on-Fiber ubiquitous antenna system. In this system, the channel state information is gathered...
Position detection of wireless terminal tends to be important technology in wireless communication system. Demand for position detection is increasing. This paper proposes position detection method using bi-directional LCX (Leaky CoaXial cable). Due to bi-directional and the reflection at end of LCX on purpose, proposed method makes four propagation pathes. Proposed system can detect two dimensional...
With the continuous emergence of new innovative wireless technologies, standards, services and applications, there is an increase demand for technologies, preferably broadband, for providing seamless connectivity between the various networks elements. This paper proposes an innovative Radio over Free-Space Optics (RoFSO) communication system having potential to be a cost-effective and reliable technology...
This paper evaluates the frequency conversion efficiency without using both local oscillator and phase-locking in Software Definable Radio Network. Proposed method simultaneously enables us to perform not only frequency conversion, but also routing for different kind of wireless service. The conversion efficiency is important issues in Fiber-radio link toward low-cost implementation. This paper proposes...
Since about 1972, the development and introduction of ICs has progressed, in order to improve the performance of TV receivers, with fairly satisfactory results. At present, technology has progressed to the point where two ICs upon which the equivalent of about 1000 elements has been integrated are used to form a small-signal system, but now simple accumulation of various IC's functions on one chip...
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