'Equipment identity register' diaporamas de présentation

Propagation models

Propagation models. Okumura Hata COST 231-Hata COST 231-Walfish-Ikegami. OKUMURA MODEL (Toki o ) (1968) Quasi-smooth terrain f = 100-3000 MHz link 1-100 km ref. ant. height , Terrain related parameters Effective base station antenna height Terrain undulation height ?h

1.09k views • 72 slides

Propagation models

Propagation models. Okumura Hata COST 231-Hata COST 231-Walfish-Ikegami. OKUMURA MODEL (Toki o ) (1968) Quasi-smooth terrain f = 100-3000 MHz link 1-100 km ref. ant. height , Terrain related parameters Effective base station antenna height Terrain undulation height ?h

1.09k views • 72 slides

Mobile Communications Chapter 4: Wireless Telecommunication Systems

Mobile Communications Chapter 4: Wireless Telecommunication Systems. GSM Overview Services Sub-systems Components. IS 95 Overview Services Sub-systems Components. 700000. 600000. Analog total. 500000. GSM total. 400000. CDMA total. subscribers (x 1000). TDMA total.

797 views • 52 slides

Basic radio frequency communications - 2

Basic radio frequency communications - 2. Session 1. Contents. Basic security concepts Attacks against wireless networks Wireless technologies Classification according to the range. Basic security concepts. Vulnerability

536 views • 42 slides

Diversity : Cellular and Wireless LANs

Bringing Cellular Service to Wireless Habitat Networks Understanding, evaluating & extending the Unlicensed Mobile Access (UMA) architecture Anshuman B. Saxena anshuman.saxena@dk-tcs.com TCS Euro-labs. Diversity : Cellular and Wireless LANs.

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Second Generation

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GSM Network

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Evolution from GMS to UMTS (3G)

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626 views • 26 slides

379 views • 26 slides