Comparison Between WiFi and WiMax

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Comparison Between WiFi and WiMax

• By
• Adel AL-Thebyani

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Outline

• Introduction
• Wireless Network
• WiFi
• WiMax

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Introduction

• Dial-up access
• Broadband access
• WiFi access (Wireless fidelity)
• WiMAX access (Worldwide Interoperability for
  microwave access)

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Cont..

• Broadband access are that it is pretty expensive
  and it doesn't reach all areas.
• WiFi access is that hot spots are very small, so
  coverage is sparse.
• WiMax access is a high speed of Broadband and is
  wireless instead of wired.

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Wireless Network

• Wireless Personal Area Networks
• - Up to 10 meter
• - IEEE 802.15.1 (Bluetooth)
• Wireless Local Area Networks
• - Up to 100 meter
• - IEEE 802.11 (WiFi)

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Wireless Network

• Metropolitan Area and Wide Area Networks
• - Up to 50Km
• - IEEE 802.16 (WiMax)

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WiFi

• IEEE 802.11 standards
• WiFi Security

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IEEE 802.11 standards
802.11g 802.11a 802.11b Standard
100-150 feet indoors 27-75 feet indoors 100-150 feet indoors Range
2.4GHz 5GHz 2.4GHz Frequency
54Mbps 54 Mbps 11 Mbps Speed
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WiFi security

• 64-bit encryption
• - original
• 128-bit encryption
• - much secure

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WiMax

• Modulation technique
• Operating frequencies
• Problems in wireless transmission

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Modulation technique
LOS PLOS NLOS Modulation
5 miles 3 miles .6 miles QAM64
8.5 miles 5 miles .8 miles QAM16
14 miles 9 miles 1.1 miles QPSK
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Operating frequencies
Operation range QPSK Operation Range QAM16 Operation RangeQAM64 Frequency Range
30 Miles 25 Miles 15 Miles 710MHz to 740MHz
30 Miles 25 Miles 20 Miles 1.9Ghz
25 Miles 18 Miles 12 Miles 3.5GHz
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Problems in wireless transmission

• Multipath fading
• Intersymbol interference (ISI)

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• THANK YOU!