By Akram Alomainy
With the advances in small and inexpensive radio transceivers and RF front-ends improvement, the potential of using ubiquitous and non-invasive sensors built-in into user's day-by-day garments and residing actions turns out extra possible. the facility to proportion info raises the usefulness of private details units, offering positive factors impossible with self sustaining remoted units. present instant sensor suggestions are restricted in that they don't give you the capability to beat stumbling blocks and shadowing of propagating radio waves. therefore for trustworthy communications a rise in energy intake is needed, lowering battery lifestyles. This ebook addresses the constraints defined above through designing effective and compact antenna structures. those structures might be cooperative and in addition conscious of the encompassing atmosphere and neighboring devices, delivering effective and occasional energy instant connectivity for private zone community (PAN) and physique sector community (BAN) functions.
- Analysis of wearable antenna layout and function
- Addresses the effect of body-worn antennas on radio channels and radio machine functionality from an influence and blunder cost perspective.
- Cooperative networking ideas utilized to physique quarter networks, exhibiting the professionals and cons of such concepts
- Real existence case situations utilizing ECG pattern signs for strength software to healthcare monitoring.
Read Online or Download Co-Operative and Energy Efficient Body Area and Wireless Sensor Networks for Healthcare Applications PDF
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Extra resources for Co-Operative and Energy Efficient Body Area and Wireless Sensor Networks for Healthcare Applications
2) As transmit and receiving antenna gain cannot be explicitly estimated because of the relative orientation and body impact, they are considered as embedded in the LP term. The routing algorithm adopted seeks to achieve minimum cost from each sensor toward the sink, where costs are proportional to the RSSI. In SH case, each sensor transmits by default to the sink so no routing data is required, while in MH protocol case, each sensor retains the next hop target sensor address to build the tree topology.
Experiments were run on an office indoor scenario. The embedded CC2420 RF transceiver provides eight transmission levels ranging from 225 to 0 dBm power output. 1). The sink collects raw data and sends statistics to an off-body server using a wireless link. The network operations can ideally be cyclically repeated and they can be divided in three main phases: (1) setting-up of the routing tree topology, (2) time slot transmission synchronization, and (3) data transmission. The first two phases can be ranked as start-up phases and the latter as steady-state phase.
In Ref , a model is presented where the sensor decrements the available energy according to the following parameters: (a) the specific transceiver characteristics, (b) size of the packets, and (c) the bandwidth used. The following equations represent the energy used for each information bit when a data packet is transmitted Eq. 4) or received Eq. 5) where V is the transceiver typical supply voltage, p is the bitrate, and ITx ðPT Þ and Irx are the transmit and receive currents, respectively.
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