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Body Area Networks are now accepted as an important part of 4th generation mobile technology. These networks operating at very low consumption, efficient power radio communications have to be developed. A promising solution is using Multi-Sensor MIMO (MS-MIMO) Ultra-WideBand (UWB) systems : each sensor carries one antenna, while the central device uses an antenna array. Thereby, this paper proposes a new analytical channel model for the diffracted waves mechanism. This is derived from the existing IEEE 802.15.4a standard channel model and innovates with space-time considerations.
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