WIRELESS NETWORKS AND MOBILE IP
WIRELESS LANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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time division multiplexing
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orthogonal frequency division multiplexing
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space division multiplexing
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channel division multiplexing
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Detailed explanation-1: -7. Mostly is used in wireless LAN. Explanation: In orthogonal frequency division multiplexing, digital data is encoded on multiple carrier frequencies. It is also used in digital television and audio broadcasting in addition to Wireless LANs.
Detailed explanation-2: -Code-division multiplexing (CDM). CDM is widely used in digital television and radio broadcasting and in 3G mobile cellular networks–4G and 5G primarily use OFDM. CDM can also support multiple signals from multiple sources, a technique known as code-division multiple access.
Detailed explanation-3: -IEEE 802.11 wireless LANs use a media access control protocol called Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA). While the name is similar to Ethernet’s Carrier Sense Multiple Access with Collision Detection (CSMA/CD), the operating concept is totally different.
Detailed explanation-4: -OFDM applications. Orthogonal frequency-division multiplexing is used in many technologies, including the following: Digital radio, Digital Radio Mondiale, and digital audio broadcasting and satellite radio. Digital television standards, Digital Video Broadcasting-Terrestrial/Handheld (DVB-T/H), DVB-Cable 2 (DVB-C2).