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antenna
(4519 results)-
White Papers
Energy-Efficient MAC and Routing Design in Distributed Beamforming Sensor Networks
December 13, 2007 12:00am PST
A major task of a wireless sensor network is energy-efficient, timely, and robust dissemination of sensor readings back to the sink node. The AIDA project aims to create a new sensor network...
Provided by: Association for Computing Machinery
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White Papers
Resource Partitioning With Beamforming for the Decode-Forward Relay Networks
December 13, 2007 12:00am PST
A joint power and time slot partitioning scheme based on the Channel Status Information (CSI) is proposed for networks of multiple relays using Decode and Forward (DF) protocol. A set of power...
Provided by: Hindawi Publishing
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White Papers
Soft Cyclic Delay Diversity and its Performance for DVB-T in Ricean Channels
December 10, 2007 12:00am PST
Cyclic Delay Diversity (CDD) provides additional diversity in Rayleigh fading channels, and therefore, improves the system performance. For Line-Of-Sight (LOS) propagation, e.g., the additive...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
DSR-Based Directional Routing Protocol for Ad Hoc Networks
December 4, 2007 12:00am PST
In this paper, a Dynamic Source Routing (DSR) - based directional routing protocol is invoked for wireless ad hoc networks using directional antennas. This is designed to balance the trade-off...
Provided by: National Institute of Standards and Technology
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White Papers
A Multiband Diversity Antenna System for Compact Mobile/Wireless Devices: Modeling and Performance Evaluation
December 3, 2007 12:00am PST
A novel compact multiband diversity antenna system appropriate for integration onto space-limited devices is presented. It comprises three pairs of printed fractal Minkowski and Koch monopole...
Provided by: Hindawi Publishing
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White Papers
A Multiband Diversity Antenna System for Compact Mobile/Wireless Devices: Modeling and Performance Evaluation
December 3, 2007 12:00am PST
A novel compact multiband diversity antenna system appropriate for integration onto space-limited devices is presented. It comprises three pairs of printed fractal Minkowski and Koch monopole...
Provided by: Hindawi Publishing
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White Papers
Experimental Study and Analysis of Antenna Effects for UWB Radio Transmission
December 2, 2007 12:00am PST
This paper present the transmission gain of UWB system based on the extended Friis' transmission formula. The template waveform is considered at the receiver side to maximize the SNR for...
Provided by: Tokyo Institute of Technology
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White Papers
Multi-Antenna Cooperative Wireless Systems: A Diversity-Multiplexing Tradeoff Perspective
December 1, 2007 12:00am PST
The authors consider a general multiple antenna network with multiple sources, multiple destinations and multiple relays in terms of the Diversity-Multiplexing Tradeoff (DMT). They examine several...
Provided by: Polytechnic University
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White Papers
A Rapid Antenna Selection for MIMO-Diversity Systems
December 1, 2007 12:00am PST
The technology of antenna selection for MIMO diversity systems can keep most of the diversity gain, yet needs no more RF chains. This paper develops a rapid antenna selection method for...
Provided by: Chinese Academy of Sciences
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White Papers
Physical Access Control for Captured RFID Data
December 1, 2007 12:00am PST
Radio frequency identification technology has become popular as an effective, low-cost solution for tagging and wireless identification. Although early RFID deployments focused primarily on...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
A Heuristic Artificial Neural Network for Analyzing and Synthesizing Rectangular Microstrip Antenna
December 1, 2007 12:00am PST
In this paper, both the synthesis and analysis of rectangular microstrip antenna models based on the artificial neural networks are presented to calculate accurately the resonant frequency of the...
Provided by: Islamic Azad University
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Whitepapers
Capacity and Performance Analysis of Space-Time Block Codes in Rayleigh Fading Channels
December 1, 2007 12:00am PST
Multi-antenna systems are expected to play very important role in future multimedia wireless communication systems. Such systems are predicted to provide tremendous improvement in spectrum...
Provided by: Dr. Babasaheb Ambedkar Technological University
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White Papers
Overcoming Interference in Spatial Multiplexing MIMO Cellular Networks
December 1, 2007 12:00am PST
Multi-antenna transmission and reception (known as MIMO) is widely touted as the key technology for enabling wireless broadband services, whose widespread success will require 10 times higher...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
High-Speed Packet Access Evolution in 3GPP Release 7
December 1, 2007 12:00am PST
High-Speed Packet Access (HSPA) was included in Third Generation Partnership Project (3GPP) releases 5 and 6 for downlink and for uplink. The 3GPP release 7 offers a number of HSPA enhancements,...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Optimal Operating Point for MIMO Multiple Access Channel With Bursty Traffic
December 1, 2007 12:00am PST
Multiple antennas at the transmitters and receivers in a Multiple Access Channel (MAC) can provide simultaneous diversity, spatial multiplexing, and space-division multiple access gains. The...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Energy-Efficiency and Transmission Strategy Selection in Cooperative Wireless Sensor Networks
December 1, 2007 12:00am PST
Energy efficiency is one of the most critical concerns for wireless sensor networks. By allowing sensor nodes in close proximity to cooperate in transmission to form a virtual Multiple-Input...
Provided by: Khartoum International Community School
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White Papers
Reduced-Complexity UWB Time-Reversal Techniques and Experimental Results
December 1, 2007 12:00am PST
This paper presents a reduced-complexity time reversal technique for Ultra-WideBand (UWB) communications. Time reversal takes advantage of rich scattering environments to achieve signal focusing...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Channel Capacity Evaluation for a Multiple-Input-Multiple-Output Terminal in the Presence of User's Hand
December 1, 2007 12:00am PST
The impact of the user's hand holding a Multiple-Input-Multiple-Output (MIMO) terminal on system performance and specifically on channel capacity is investigated. A 4 x 4 MIMO system is considered...
Provided by: University of Patras
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White Papers
A Rigorous Analysis of the Statistical Properties of the Discrete-Time Triply-Selective MIMO Rayleigh Fading Channel Model
December 1, 2007 12:00am PST
The use of multiple antennas for wireless communication systems has gained much interest during the last decade, since multiple-antenna techniques offer capacity gains, diversity gains, and...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Physical Layer Approximations for Cross - Layer Performance Analysis in MIMO-BLAST Ad Hoc Networks
December 1, 2007 12:00am PST
In this paper, the authors consider a MAC protocol for ad hoc networks where nodes are equipped with multiple antennas, and communications are spatially multiplexed using the Bell labs LAyered...
Provided by: Institute of Electrical & Electronic Engineers
