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You searched on: Topic Area: Wireless

Displaying records 11 to 20 of 39 records.
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11. Distributed Coverage Optimization in a Network of Static and Mobile Sensors
Topic: Wireless
Published: 6/17/2013
Authors: Kamran Sayrafian, Hamid Mahboubi, Jalal Habibi, Amir Aghdam
Abstract: This paper proposes efficient schemes to increase sensing coverage in a network composed of both mobile and static sensors. The proposed deployment techniques properly assign a virtual weight to every point in the sensing field, based on the infor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913312

12. Cooperative Diversity Routing and Transmission for Wireless Sensor Networks
Topic: Wireless
Published: 4/12/2013
Author: Hamid Gharavi
Abstract: In this paper, we present a novel design framework aimed at developing ‰cooperative diversity‰ in 802.11-based wireless sensor networks. The proposed scheme is a combination of a time-reversed Space-Time Block Code (TR STBC) scheme at the physical la ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913802

13. Dynamic Key Refreshment for Smart Grid Mesh Network Security
Topic: Wireless
Published: 2/24/2013
Author: Hamid Gharavi
Abstract: This paper presents a dynamically updating key distribution strategy to enhance mesh network security against cyber attacks. The scheme has been applied to two security protocols known as Simultaneous Authentication of Equals (SAE) and Efficient Mesh ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912924

14. Novel Tree-Search Algorithm versus Sphere-Decoding-based Algorithms for MIMO system with Inter-Symbol Interference
Topic: Wireless
Published: 12/3/2012
Author: Hamid Gharavi
Abstract: In this paper we firstly propose a general model to combat the Inter-Symbol Interference (ISI) caused by frequency selective channels in a Multi-InputMulti-Output (MIMO) system and/or by asynchronous cooperative transmissions. The general model is no ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911826

15. Biometrics in a Networked World
Topic: Wireless
Published: 12/2/2012
Author: Kevin C Mangold
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911889

16. Virtual Reality Platform to Study RF Propagation in Body Area Networks
Topic: Wireless
Published: 12/2/2012
Authors: Kamran Sayrafian, John G Hagedorn, Wen-Bin Yang, Judith Ellen Terrill
Abstract: Design of efficient wireless communication protocols for body area networks requires in-depth understanding of the propagation media i.e. the human body. As obtaining large amount of data for many scenarios and use-cases via physical experiment i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912376

17. A Low-Complexity Solution to Decode Diversity-Oriented Block Codes in MIMO Systems with Inter-Symbol Interference
Topic: Wireless
Published: 10/1/2012
Authors: Hamid Gharavi, Chong Xu
Abstract: In this paper we firstly propose a block-code based general model to combat the Inter-Symbol Interference (ISI) caused by frequency selective channels in a Multi-Input Multi- Output (MIMO) system and/or by asynchronous cooperative transmissions. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911916

18. Radiation Pattern of an UWB Wearable Antenna: A Preliminary Study
Topic: Wireless
Published: 9/24/2012
Authors: Wen-Bin Yang, Kamran Sayrafian
Abstract: Inhomogeneity of the propagation medium in body area networks could have a great impact on the sensor node‰s antenna characteristics. This in turn could affect the quality of the communication links unless the impact of the human body has been pr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912111

19. Battery Discharge Characteristics of Wireless Sensors in Building Applications
Topic: Wireless
Published: 4/11/2012
Authors: Wenqi Guo, William M Healy, Mengchu Zhou
Abstract: Sensor nodes in wireless networks often use batteries as their source of energy, but replacing or recharging exhausted batteries in a deployed network can be difficult and costly. Therefore, prolonging battery life becomes a principal objective ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910723

20. Ant-Colony Based Near-ML Block Decoder in Asynchronous Cooperative MIMO Systems Using a Linear Dispersion Structure
Topic: Wireless
Published: 6/5/2011
Authors: Hamid Gharavi, Chong Xu
Abstract: The linear dispersion structure is employed to accommodate the dynamic topology of cooperative networks, as well as to achieve higher throughput than conventional space-time codes based on orthogonal designs. Asynchronous Cooperative Liner Dispersio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907007



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