J Med Syst - A comprehensive study of channel estimation for WBAN-based healthcare systems: feasibility of using multiband UWB.

Tópicos

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Resumo

Wireless personal area network (WPAN) is an emerging in wireless technology for short range indoor and outdoor communication applications. A more specific category of WPAN is the wireless body area network (WBAN) used for health monitoring. On the other hand, multiband orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) comes with a number of desirable features at the physical layer for wireless communications, for example, very high data rate. One big challenge in adoption of multiband UWB in WBAN is the fact that channel estimation becomes difficult under the constraint of extremely low transmission power. Moreover, the heterogeneous environment of WBAN causes a dense multipath wireless channel. Therefore, effective channel estimation is required in the receiver of WBAN-based healthcare system that uses multiband UWB. In this paper, we first outline the MB-OFDM UWB system. Then, we present an overview of channel estimation techniques proposed/investigated for multiband UWB communications with emphasis on their strengths and weaknesses. Useful suggestions are given to overcome the weaknesses so that these methods can be particularly useful for WBAN channels. Also, we analyze the comparative performances of the techniques using computer simulation in order to find the energy-efficient channel estimation methods for WBAN-based healthcare systems.

Resumo Limpo

wireless person area network wpan emerg wireless technolog short rang indoor outdoor communic applic specif categori wpan wireless bodi area network wban use health monitor hand multiband orthogon frequenc divis multiplex mbofdm ultrawideband uwb come number desir featur physic layer wireless communic exampl high data rate one big challeng adopt multiband uwb wban fact channel estim becom difficult constraint extrem low transmiss power moreov heterogen environ wban caus dens multipath wireless channel therefor effect channel estim requir receiv wbanbas healthcar system use multiband uwb paper first outlin mbofdm uwb system present overview channel estim techniqu proposedinvestig multiband uwb communic emphasi strength weak use suggest given overcom weak method can particular use wban channel also analyz compar perform techniqu use comput simul order find energyeffici channel estim method wbanbas healthcar system

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