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Wireless body area communication is of importance for healthcare and medical applications. In this study, an on-body ultra wideband channel model was developed based on a measurement approach with an emphasis on various body postures and the floor effect. The results show that a complete channel model can be regarded as a combination of the on-body propagation characteristic and additional components...
The objective of this study is to investigate the feasibility of an ultra wideband (UWB) impulse radio system for in-body to out-of-body wireless communication for biomedical applications. At first, a UWB antenna is designed in the UWB low band for implant use in the chest. Then the channel model is extracted and established based on finite difference time domain (FDTD) simulation with an anatomical...
Ultra wideband (UWB) communication is a promising technique for biomedical body area networks (BAN). In this paper, the performance of wearable and implant BAN links on chest, which correspond to communication links of chest-to-waist and chest inside-to-outside respectively, are investigated. The channel models are first derived based on the frequency-dependent finite difference time domain (FDTD)...
In IEEE 802.16e mobile WiMAX system, since mobile stations (MSs) send bandwidth request (BR) messages to base station (BS) during contention period when they need uplink channel to transmit data in the case of multicast polling or broadcast polling, the uplink performance is affected by the size of the contention period in the uplink subframe. The access delay will be increased if the size of the...
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