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narrowband
(144 results)-
White Papers
On Frequency-Selective Scheduling in SDMA-OFDMA Systems
February 29, 2012 12:00am PST
Orthogonal Frequency Division Multiple Access (OFDMA) is a multi-user version of the Orthogonal Frequency Division Multiplexing (OFDM) transmission technique, which divides a wideband channel into...
Provided by: Humboldt University Berlin
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White Papers
Improved Wideband Precoding With Arbitrary Subcarrier Grouping in MIMO-OFDM Systems
February 1, 2012 12:00am PST
Precoding in the multiple-input multiple-output orthogonal frequency division multiplexing system is investigated. In conventional WideBand Precoding (WBP), only one precoder, obtained from the...
Provided by: ETRI Journal
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White Papers
Cascade Adaptive IIR Notch Filter for Multiple NBI Suppression in QPSK DS-CDMA System
January 31, 2012 12:00am PST
Bit Error Ratio (BER) performance of Quadri-Phase Shift Keying Direct-Sequence Code-Division Multiple Access (QPSK DSCDMA) communication system in the presence of multiple Narrow-Band Interference...
Provided by: University of Dodoma
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White Papers
Microstrip Rectangular Patch Antenna : Computer Aided Design Methology
January 28, 2012 12:00am PST
Antenna is a means for radiating or receiving radio waves. In addition to receiving or transmitting energy, an antenna in an advanced wireless system is usually required to optimize the radiation...
Provided by: International Journal of Computer Science and Information Technologies
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White Papers
Enhanced FCME Thresholding for Wavelet-Based Cognitive UWB Over Fading Channels
December 1, 2011 12:00am PST
The cognitive Ultra-WideBand (UWB) network detects interfering narrowband systems and adapts its configuration accordingly. An inherently adaptive and flexible candidate for cognitive UWB...
Provided by: ETRI Journal
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White Papers
Information-Theoretic Limits of Dense Underwater Networks
October 17, 2011 12:00am PDT
Information-theoretic throughput scaling laws are analyzed in an underwater acoustic network with n regularly located nodes on a unit square, in which both bandwidth and received signal power can...
Provided by: Harvard University
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White Papers
Information-Theoretic Limits of Dense Underwater Networks
October 17, 2011 12:00am PDT
Information-theoretic throughput scaling laws are analyzed in an underwater acoustic network with n regularly located nodes on a unit square, in which both bandwidth and received signal power can...
Provided by: Harvard University
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White Papers
Performance Evaluation of PLC Over the IEC 61851 Control Pilot Signal
September 21, 2011 12:00am PDT
Powerline Communications is the proposed ISO/OSI layer 1 and 2 technology of the ISO/IEC 15118 joint working group for the Vehicle-to-Grid Communication Interface in case of conductive charging....
Provided by: Technische Universitat Dortmund
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White Papers
WPAN Interference Cancellation From OFDM Based WLAN : Strategic Comparisons of Coexistence Techniques
September 1, 2011 12:00am PDT
WLAN and WPAN operate in the same 2.4GHz ISM band. So whenever they operate nearby interfere with each other, results in performance degradation for both the system in terms of bit error rate or...
Provided by: Cyber Journals
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White Papers
Simulation and Evaluation of a Simple Adaptive Antenna Array for a WCDMA Mobile Communication
August 28, 2011 12:00am PDT
This paper presents a uniform Linear Array model of a simple adaptive antenna array based on Signal-to-Interference and Noise Ratio (SINR) maximization. The SINR using the adaptive antenna array...
Provided by: The Science and Information Organization
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White Papers
The Impact of Antenna Directivity and Channel Bandwidth on the Power Spectral Density of Wideband and UWB MISO Channels
July 11, 2011 12:00am PDT
The combination of MIMO with WideBand (WB) and Ultra-WideBand (UWB) systems imply many new effects, which make the conventional channel models developed for narrowband transmissions to be...
Provided by: IARIA
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White Papers
Suppression of Narrowband Interference in Impulse Radio Based High Data Rate UWB WPAN Communication System Using NLOS Channel Model
June 22, 2011 12:00am PDT
Study on suppression of interference in time domain equalizers is attempted for high data rate Impulse Radio (IR) ultra wideband communication system. The narrow band systems may cause...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Suppression of Narrowband Interference in Impulse Radio Based High Data Rate UWB WPAN Communication System Using NLOS Channel Model
June 22, 2011 12:00am PDT
Study on suppression of interference in time domain equalizers is attempted for high data rate Impulse Radio (IR) ultra wideband communication system. The narrow band systems may cause...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Wideband Analysis of Mutual Coupling Compensation Methods
June 21, 2011 12:00am PDT
The performance of various mutual coupling estimation and compensation methods is quantified and compared for wideband operation. Their main limitations and the required procedures to estimate the...
Provided by: Hindawi Publishing
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White Papers
Development of a Multiple-Input Multiple-Output Ultra-Wideband System Emulator
June 2, 2011 12:00am PDT
An experimental testbed is described for the characterization of indoor channels with sufficient spatial resolution and sufficient bandwidth to study the practical capacities of MIMOUWB systems....
Provided by: Liverpool John Moores University
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White Papers
Probability of Early Detection of Ultra-Wideband Positioning Sensor Networks
May 14, 2011 12:00am PDT
Ultra-WideBand (UWB) sensor networks can be efficiently applied to collect data through sensors deployed for preserving environment and rescuing lives. The high-precision positioning capabilities...
Provided by: Aristotle University of Thessaloniki
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White Papers
On Comparison of DFT-Based and DCT-Based Channel Estimation for OFDM System
May 1, 2011 12:00am PDT
For high data rate communication with the required Quality of Service (QoS) in 3G and 4G systems, Orthogonal Frequency Division Multiplexing (OFDM) is proposed, which is capable to resist the...
Provided by: Institute of Space Technology
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White Papers
Group Sparse Lasso for Cognitive Network Sensing Robust to Model Uncertainties and Outliers
April 28, 2011 12:00am PDT
To account for variations in the frequency, time, and space dimensions, dynamic re-use of licensed bands under the Cognitive Radio (CR) paradigm calls for innovative network-level sensing...
Provided by: University of Minnesota
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White Papers
Group Sparse Lasso for Cognitive Network Sensing Robust to Model Uncertainties and Outliers
April 28, 2011 12:00am PDT
To account for variations in the frequency, time, and space dimensions, dynamic re-use of licensed bands under the Cognitive Radio (CR) paradigm calls for innovative network-level sensing...
Provided by: University of Minnesota
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White Papers
Distributed Compressed Wideband Sensing in Cognitive Radio Sensor Networks
April 8, 2011 12:00am PDT
A novel distributed compressed wideband sensing scheme for Cognitive Radio Sensor Networks (CRSN) is proposed in this paper. Taking advantage of the distributive nature of CRSN, the proposed...
Provided by: Institute of Electrical and Electronics Engineers
