'Spatial diversity' diaporamas de présentation

Wireless Medium Access Control Romit Roy Choudhury Wireless Networking Lectures Duke University

1.06k views • 80 slides

Wireless Solutions

Wireless Solutions. Team 1. Introduction. What is Satellite. Satellite internet uses a satellite dish for two-way data communication. Satellite internet is a high speed internet solution that is available to people in rural areas.

884 views • 32 slides

Combs, Needles, and Haystacks: Balancing Push and Pull for Information Discovery

Combs, Needles, and Haystacks: Balancing Push and Pull for Information Discovery. Xin Liu Computer Science Dept. University of California, Davis Collaborators: Qingfeng Huang & Ying Zhang , PARC. Presented by Chien-Liang Fok on March 4, 2004 for CSE730. Objective.

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Coded Modulation for Orthogonal Transmit Diversity

Coded Modulation for Orthogonal Transmit Diversity. Motivation. Wireless Communication Environment Noise Multipath Fading MAI Demands Multimedia applications ? High rate Data communication ? Reliability. Challenges. Problems

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Spatial Diversity and Multiuser Diversity in Wireless Communications

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Spatial Diversity and Multiuser Diversity in Wireless Communications

339 views • 22 slides

MIMO WIRELESS COMMUNICATION SYSTEMS

MIMO WIRELESS COMMUNICATION SYSTEMS. Bhaskar D. Rao University of California, San Diego La Jolla, CA 92093-0407. Textbooks. Introduction to Space-Time Wireless Communications, A. Paulraj, R. Nabar and D. Gore, Cambridge University Press

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Space Time Codes

Space Time Codes. Attenuation in Wireless Channels. Path loss: Signals attenuate due to distance Shadowing loss : absorption of radio waves by scattering structures Fading loss :constructive and destructive interference of multiple reflected radio wave paths

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Coded Transmit Macrodiversity: Block Space-Time Codes over Distributed Antennas

Coded Transmit Macrodiversity: Block Space-Time Codes over Distributed Antennas. Yipeng Tang and Matthew Valenti Lane Dept. of Comp. Sci. & Elect. Engg. West Virginia University mvalenti@wvu.edu. Overview. Block Space Time Codes Coded Transmit Macrodiversity

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Geographic Random Forwarding with Hybrid-ARQ for Ad Hoc Networks with Rapid Sleep Cycles

Geographic Random Forwarding with Hybrid-ARQ for Ad Hoc Networks with Rapid Sleep Cycles. Bin Zhao Efficient Channel Coding Inc. Brooklyn Heights, OH 44131 {bzhao}@eccincorp.com. Rohit Iyer Seshadri and Matthew C. Valenti West Virginia University Morgantown, WV 26506-6109

260 views • 19 slides

Geographic Random Forwarding with Hybrid-ARQ for Ad Hoc Networks with Rapid Sleep Cycles

Geographic Random Forwarding with Hybrid-ARQ for Ad Hoc Networks with Rapid Sleep Cycles. Bin Zhao Efficient Channel Coding Inc. Brooklyn Heights, OH 44131 {bzhao}@eccincorp.com. Rohit Iyer Seshadri and Matthew C. Valenti West Virginia University Morgantown, WV 26506-6109

192 views • 19 slides

Cooperative Diversity Using Distributed Turbo Codes

Cooperative Diversity Using Distributed Turbo Codes. Bin Zhao and Matthew C. Valenti mvalenti@wvu.edu Lane Dept. of Comp. Sci. & Elect. Eng. West Virginia University Morgantown, WV This work was supported by the Office of Naval Research under grant N00014-00-0655. Motivation & Goals.

357 views • 17 slides

Satellite Radio: The Next Communications Revolution?

Satellite Radio: The Next Communications Revolution?. David Bultman. Challenges In Satellite Radio . There are three general problems with satellite reception: Blockages Foliage Multipath Fading. Blockages. The target of satellite radio is a mobile platform

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Multiple Sensor Communications MIMO

Multiple Sensor Communications MIMO. MESA Meeting. O ur proposal. Provide a low cost system with the necessary throughput Rely on existing standards Increase the system capacity with limited system impact Specialise an existing system to fulfil the MESA like system requirements

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Some Thoughts on the Technical Requirements for a HTSG

Some Thoughts on the Technical Requirements for a HTSG. John Terry, NRC. 4. Technical Feasibility. Potential Approaches to Study: Modulation and Coding Enhancements Spatial Diversity Techniques Spatial Multiplexing 4. Double bandwidth solutions with underlying 11a waveforms

74 views • 7 slides