Garis besar topik
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WIRELESS TRANSMISSION TECHNOLOGY AND SYSTEMS
In this chapter we look at radio-channel-related issues. It should immediately be noted that to maximize the opportunity for widespread and cost-effective deployment of WSN , one needs to make use of existing and/or emerging commercial off-the-she lf (COTS) wireless communications and inf rastructures rath er than having to develop an entirely new, specially designed apparatus. WSNs can use a number of wireless COTS technologies, such as Bluetooth/Persona l Area Networks (PANs), ZigBee , wireless LANs (WLAN)/hotspots, broadband wireless access (BWA)/WiMax, and 3G.
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Siswa harusTandai selesai
The electromagnetic spectrum provides an unguided medium (channel) for point-to- point and/or broad cast radio transmission. Radio transmissi on is usually (frequency)-bandlimited by design. The analog bandwidth of the channel (the slice of electromagnetic frequency domain used) determines how much information (analog or digital) can be transmitted over the channel.
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