'Path loss' diaporamas de présentation

200

Wireless Antennas. 802.11 Standards. Wireless Signal Interference. Wireless Networks. Wireless Terminology. Wireless Facts . Wireless Trivia. 100. 100. 100. 100. 100. 100. 100. 200. 200. 200. 200. 200. 200. 200. 300. 300. 300. 300. 300. 300. 300. 400. 400.

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Link layer behavior of body area networks at 2.4 GHz

Link layer behavior of body area networks at 2.4 GHz. Anirudh Natarajan , Buddhika de Silva Kok-Kiong Yap Mehul Motani Electrical & Computer Engineering, National University of Singapore and Electrical Engineering, Stanford University. Personal information. Esteban Orduno

1.11k views • 97 slides

EECS 380: Wireless Communications Weeks 3-4: Propagation

EECS 380: Wireless Communications Weeks 3-4: Propagation. Michael L. Honig Department of EECS Northwestern University. October 2009. Why Study Radio Propagation?. To determine coverage Must determine path loss Function of Frequency Distance

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Radio Propagation

2.84k views • 80 slides

Data and Computer Communications

607 views • 48 slides

1587: COMMUNICATION SYSTEMS 1 Mobile Communications

1587: COMMUNICATION SYSTEMS 1 Mobile Communications. Dr. George Loukas. University of Greenwich, 2011-2012. WANs quick revision: Topology. Wide Area Network. WAN. Use local and long-distance telecommunications Usually very high speed with low error rates Usually follow a mesh topology.

623 views • 43 slides

Indoor Communications

Indoor Communications. Rex Chen rex@ics.uci.edu. Outline. Overview Technologies Challenges Paper Discussion Research Progress Conclusion. Overview of Indoor Communication. Lots of electronic gadgets Need for connectivity Usually in proximity e.g. 1 to 30 meters Characteristics

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Packet service in UMTS: delay-throughput performance of the downlink shared channel

Packet service in UMTS: delay-throughput performance of the downlink shared channel. Flaminio Borgonovo, Antonio Capone, Matteo Cesana, Luigi Fratta. 1. Introduction. In the last ten years: IP applications has pushed the data traffic to grow quickly

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Chapter 2 The Cellular Concept

Chapter 2 The Cellular Concept. 2.1 Introduction to Cellular Systems. Solves the problem of spectral congestion and user capacity. Offer very high capacity in a limited spectrum without major technological changes. Reuse of radio channel in different cells.

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Technology For All Wireless: Deployment, Measurements, and New Applications

Technology For All Wireless: Deployment, Measurements, and New Applications. Ed Knightly Rice University http://www.ece.rice.edu/~knightly. The Digital Divide Challenge. Southeast Houston 37% of children below poverty 56% have < $25,000/year household income

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Lecture 3

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Basic RF Transmission Concepts

Basic RF Transmission Concepts. Ant. Ant. Feedline. Feedline. Radio Systems . This presentation concentrates on the propagation portion. Transmitter. Information. Modulator. Amplifier. Filter. RF Propagation. Receiver. Information. Demodulator. Pre-Amplifier. Filter.

610 views • 21 slides

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: FPP SUN Simulation Re

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802.11 on Campus

802.11 on Campus. Philippe Hanset University of Tennessee phanset@utk.edu. Story of UT Wireless Project. 8 Pilots in Summer 2000 Vendor testing Immediate success in CS, MBA, Architecture Instructed in October 2000 to take campus wireless by fall 2001. A Wireless plan in 2 days !

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COST 273 "Towards Mobile Broadband Multimedia Networks"

COST 273 "Towards Mobile Broadband Multimedia Networks". Bulgarian participation. COST 273 (May 2001 - June 2005) is a successor of the following actions in the field of radio wave propagation and networks planning: .

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Chapter 6 Wireless and Mobile Networks

Chapter 6 Wireless and Mobile Networks. Computer Networking: A Top Down Approach Featuring the Internet , 3 rd edition. Jim Kurose, Keith Ross Addison-Wesley, July 2004. . Background: # wireless (mobile) phone subscribers now exceeds # wired phone subscribers!

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Fading Techniques

Fading Techniques . Rayleigh Fading Channel. We starts from additive white Gaussian noise (AWGN), with statistically independent Guassian noise sample corrupting data samples free of intersymbol interference (ISI). Causes to degradation: Thermal noise at the receiver

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Noise Figure, Noise Factor and Sensitivity

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Wireless Sensor Networks 16th Lecture 19.12.2006

Wireless Sensor Networks 16th Lecture 19.12.2006. Christian Schindelhauer. Goals of this chapter. Means for a node to determine its physical position (with respect to some coordinate system) or symbolic location Using the help of Anchor nodes that know their position Directly adjacent

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TAXI

Region. TAXI. City. Campus. In-Building. Figure 1. 100. USA market. 90. 80. 70. cellular + PCS subs. Internet users. 60. millions. 50. paging subs. 40. 30. dedicated wireless . laptop users. data subs. 20. 10. annual laptop sales. 0. 1995. 2000. Figure 2.

400 views • 8 slides