'Directional antenna' presentation slideshows

CCNA DISCOVERY 1

1.14k views • 100 slides

Routing in Mesh Networks

Routing in Mesh Networks. Myung. J Lee, Chunhui Zhu Samsung Lab @ CUNY {lee, zhuc}@ccny.cuny.edu. Definitions of Mesh Network Features of Mesh Network Desirable Qualitative Properties (IETF) Quantitative Metrics Basic Classifications Proactive, Reactive and Hybrid

735 views • 57 slides

Physical layer

Physical layer. Taekyoung Kwon. signal. physical representation of data function of time and location signal parameters of periodic signals: period T, frequency f=1/T, amplitude A, phase shift ? E.g., sinewave is expressed as s(t) = A t sin(2 ? f t t + ? t ).

702 views • 56 slides

NetClock Time Synchronization Solutions

NetClock Time Synchronization Solutions. Product Sales Training. Spectracom is a Business of the Orolia Group. A high-tech electronics group specializing in Positioning, Navigation and Timing technologies

979 views • 54 slides

Chapter 6: Connecting Through a Wireless Network

Chapter 6: Connecting Through a Wireless Network. Current Wireless Networking Technologies. Two drawbacks of wire-based networking Tangle of wires connecting computer and peripherals Cost of pulling wires through walls, ceilings, floors Wireless technology resolves many wire-based issues

680 views • 53 slides

Mitigation of Primary User Emulation Attack using Time of Emission Estimation

Mitigation of Primary User Emulation Attack using Time of Emission Estimation . Natraj Jaganmohan ( njaganm ) Sandeep A Rao ( sarao ). Agenda of the presentation: . Background about Cognitive Radio Networks Primary User Emulation Attack (PUEA) Existing approaches to solve PUEA.

582 views • 47 slides

Chapter 8

Chapter 8. Wireless Security. Objectives. Explain wireless networking and why it is used Describe IEEE 802.11 radio wave networking Explain Bluetooth networking Describe attacks on wireless networks Discuss wireless security measures

611 views • 46 slides

CLT for Degrees of Random Directed Geometric Networks

CLT for Degrees of Random Directed Geometric Networks. Yilun Shang Department of Mathematics, Shanghai Jiao Tong University. May 18, 2008. Context. Background and Motivation Model Central limit theorems Degree distributions Miscellaneous. (Static) sensor network.

471 views • 37 slides

Wireless Security

479 views • 35 slides

Content

Overview of International guidelines concerning Human exposure to RF radiation From GSM Base Stations Eng. Nasser Al-Nasser Communications and Information Technology Commission Kingdom of Saudi Arabia . Content. Introduction Electromagnetic Waves Basics GSM Technology

519 views • 34 slides

Sniffer for detecting lost mobile

912 views • 29 slides

Vivek Jain, Anurag Gupta Dharma P. Agrawal

A Cross Layer MAC with Explicit Synchronization through Intelligent Feedback for Multiple Beam Antennas. Vivek Jain, Anurag Gupta Dharma P. Agrawal. Dhananjay Lal. ECECS Department University of Cincinnati {jainvk, guptaag, dpa}@ececs.uc.edu. Research and Technology Center

383 views • 28 slides

Anatomy of Radio LAN

Anatomy of Radio LAN. Onno W. Purbo Onno@indo.net.id. Reference. http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Linux.Wireless.wlan.html. Functional Diagram. Spread Spectrum Techniques. Direct Sequence Frequency Hopping. Direct Sequence. Frequency Hopping. Comparisons.

396 views • 24 slides

Wireless Communications

Wireless Communications. How Antennas Work. Objectives. Outline the purpose of an antenna List the different antenna types, shapes and sizes, and their applications. Gain and Loss. Understanding RF signal transmission involves:

400 views • 18 slides

MAC Protocols that use Directional Antennnas

MAC Protocols that use Directional Antennnas. Directional communication Less Energy in the wrong direction Better Spatial reuse and less multipath More Energy in the right direction Longer ranges more robust links Reduce interference to other neighbor nodes ? increase throughput

482 views • 15 slides

OPERATIONAL TECHNIQUES

OPERATIONAL TECHNIQUES. By Harpinder Kang Khattra. Topics. Parameters Coverage hole filler Leaky feeders Cell splitting and small cells Narrow beam concept. ADJUSTING THE PARAMETERS OF A SYSTEM. Increasing the Coverage for a Noise-Limited System Reducing the Interference

286 views • 14 slides

Signals Analog signal Digital signal

Signals Analog signal Digital signal. Antennas. Isotropic Radiator. Hertzian Dipole. Marconi Antenna. Directional Antenna. Sectorized Antenna. Smart Antenna. Diversity Antenna Systems. Signal Propagation. Transmission Range Detection Range Interference Range.

373 views • 11 slides

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Proposed Technical Requirements for mm-Wave WPAN ] Date Submitted: [ 15 September 2003] Source: [Yuichi Shiraki] ?????? Company [Oki Electric Industry Co., Ltd.]

177 views • 11 slides

802.11 Denial Of Service

Andrew Taylor. 802.11 Denial Of Service. Types of DoS. Electronic/ Phy layer Overpowering, modulation techniques Management Frame DoS i.e. RTS/CTS Application Specific Application layer vulnerabilities. Low level interference. Quick interference recap:

95 views • 9 slides

The Customer

The Customer.

126 views • 8 slides