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Next-Generation Ultra-High-Speed Wireless Systems
Posted: 08-Apr-2003 [Source: NEC]

[Here is a glimpse into the future of ultra high speed wireless short range systems.]

Tokyo -- NEC Corporation (NEC) today announced the successful development of RADIOSCAPE*1 -UWB, a radio propagation simulator that enables visual analysis of the coverage area of UWB (Ultra Wideband*2) systems, focusing on the structure of the transmission space and the influence of interference with existing wireless systems. This simulator represents a pioneer development in the field of UWB-the ultra-high-speed short-range wireless system of the future.

RADIOSCAPE-UWB was realized by using broadband channel prediction algorithm, which enables calculation of radio propagation over a bandwidth several hundred times wider than conventional wireless systems, to widen the bandwidth of NEC's existing RADIOSCAPE radio propagation simulator. The new simulator allows developers to design UWB systems and develop products with UWB interface with much greater efficiency.

RADIOSCAPE-UWB expands the bandwidth used by NEC's original radio propagation simulator developed for narrow-band communication systems such as existing wireless LANs to a wide bandwidth of 3.1 GHz to 10.6 GHz, which is the UWB usable frequency bandwidth prescribed by FCC, and which represents a more than 100-fold bandwidth increase.

Research, development, and standardization of UWB systems has been progressing rapidly on a global scale, but the labor required to create appropriate evaluation environments and obtain experimental licenses in order to design systems and gain the necessary transmission characteristics is extensive. By providing UWB support for the RADIOSCAPE simulator-already being used by NEC for its ASP service-which visualizes the radio propagation coverage area of a wireless LAN, the new simulator enables the propagation area of a UWB system to be visualized quickly, promoting economical and efficient system design and transmission characteristics evaluation.

Recent years have seen a huge increase in the use of installation-friendly wireless LANs among the general population as the number of households with PCs and Internet access has increased, raising the demand for facilities that handle high-speed data. Recognizing the benefits of wireless transmission, the industry is now working to develop and standardize UWB systems that can handle high-quality images and transmit data at high speeds: features that could not be easily achieved with conventional wireless LAN systems. Unlike the narrow-band communication method used by existing wireless LAN systems, however, this kind of high-speed wireless UWB system uses an extremely wide bandwidth (more than 100 times wider), which produces different transmission characteristics for each of the many frequency components in the bandwidth when the radio waves are propagated through the actual space, making it very difficult to grasp the characteristics as a whole.

NEC has concentrated considerable research and development resources on solving this problem, culminating in the successful development of RADIOSCAPE-UWB, which features analysis of the radio propagation characteristics of a UWB system on the Web, as well as analysis of the effects of mutual interference between a UWB system and existing wireless system.

NEC believes that the development of RADIOSCAPE-UWB will promote the further development and standardization of UWB systems, and intends to accelerate research and development activities aimed at early commercialization.

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