Download What is Wireless Communication?

What is Wireless Communication?
Transmitting/Receiving voice and data using
electromagnetic waves in open space.
• The information from sender to receiver is
carrier over a well defined frequency band
(channel).
• Each channel has a fixed frequency
bandwidth and capacity (bit-rate)
• Different channels can be used to transmit
information in parallel and independently.
5/25/2017
Department of Electrical and Electronics,
Nepal Engineering College
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Why Wireless Communication?
• Freedom from wires
 No cost of installing wires or rewiring
 Mobile devices possible
 E.g.: Bluetooth, WiFi
• Stay connected
Roaming allows flexibility to stay connected
anywhere and any time
5/25/2017
Department of Electrical and Electronics,
Nepal Engineering College
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Wireless Vs Mobile
• Wireless does not necessarily
mobile.
• Wireless System may be:
mean
 Fixed (e.g. Metropolitan Area Network)
 Portable (e.g. Wireless interaction between TV
and VCR)
 Mobile (e.g. Mobile phone)
5/25/2017
Department of Electrical and Electronics,
Nepal Engineering College
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Telecom Service provider of Nepal
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NDCL- Nepal doorsanchar Company limited
NCELL
UTL- United Telecom Limited
STM- STM Telecom Sanchar Pvt.Ltd
NSTPL- Nepal Satellite Telecom Pvt.Ltd
STPL- Smart Telecom Pvt.Ltd
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Department of Electrical and Electronics,
Nepal Engineering College
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Telecom Statistics at a glance (as of Ashad, 2070,
15 July, 2013)-NTA MIS Report
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Available Voice Telephony Services
LMS-Location and Monitoring services
GMPCS-Global Mobile Personal Communication by Satellite
5/25/2017
Department of Electrical and Electronics,
Nepal Engineering College
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Telecom Statistics at a glance (as of Ashad, 2070,
15 July, 2013)-NTA MIS Report
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Data Internet services
5/25/2017
Department of Electrical and Electronics,
Nepal Engineering College
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Current Wireless Systems
• Cellular Systems
• Wireless LANs (802.11a/b/g, Wi-Fi)
• Satellite Systems
• Paging Systems
• Bluetooth
• Ultrawideband radios (UWB)
• Zigbee/802.15.4 radios
• WiMAX (802.16)
5/25/2017
Department of Electrical and Electronics,
Nepal Engineering College
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Emerging Systems
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5/25/2017
Cognitive radio networks
Ad hoc/mesh wireless networks
Sensor networks
Distributed control networks
The smart grid
Biomedical networks
Department of Electrical and Electronics,
Nepal Engineering College
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Current Research by
Prof. Theodore (Ted) S. Rappaport
Latest research in millimeter wave cellular propagation
and broadband communications using adaptive
antennas – 5th Generation Cellular
5/25/2017
Department of Electrical and Electronics,
Nepal Engineering College
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Thank you!!
5/25/2017
Department of Electrical and Electronics,
Nepal Engineering College
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