Results 261 to 270 of about 1,050,910 (295)

Enhanced error vector magnitude (EVM) measurements for testing WLAN transceivers

Proceedings of the 2006 IEEE/ACM international conference on Computer-aided design - ICCAD '06, 2006
As wireless LAN devices become more prevalent in the consumer electronics market, there is an ever increasing pressure to reduce their overall cost. The test cost of such devices is an appreciable percentage of the overall cost, which typically results from the high number of specifications, the high number of distinct test set-ups and equipment pieces
Erkan Acar, Sule Ozev, Kevin Redmond
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Error Vector Magnitude Measurement On Cascaded Butler Matrices System

2007 Asia-Pacific Microwave Conference, 2007
This paper describes error vector magnitude (EVM) measurement on vehicle communication system that employs low noise amplifiers (LNAs) and cascading Butler Matrices in producing broad beam high linearity and high gain narrow beam system. The output signals from the first Butler Matrix that have high gain and narrow beam width can be used for long ...
Sharul Kamal Abdul Rahim, Peter Gardner
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Reducing error vector magnitude of OFDM signals using threshold vector circle method

SPIE Proceedings, 2016
The main disadvantage of Orthogonal Frequency Division Multiplexing (OFDM) signal is the high peak-to-average power ratio (PAPR) which influences the system power efficiency and system performance in the presence of nonlinearities within the high power amplifier (HPA). The error vector magnitude (EVM) is one of the performance metrics by communications
Jingqi Wang, Qingqing Wu, Dong Wang, Chunlei Zhang, Wen Wu   +4 more
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Corrections to “Error Vector Magnitude as a Performance Measure for Advanced Modulation Formats” [Jan 1, 2012 61-63]

IEEE Photonics Technology Letters, 2012
R. Schmogrow, B. Nebendahl, M. Winter, A. Josten, D. Hillerkuss, S. Koenig, J. Meyer, M. Dreschmann, M. Huebner, C. Koos, J. Becker, W. Freude, J. Leuthold   +12 more
semanticscholar   +3 more sources

Effective evaluation of link quality using error vector magnitude techniques

Proceedings of 1997 Wireless Communications Conference, 2002
Bit error rate (BER) is an accepted figure of merit in the industry for the characterization of transmission link quality and communications systems in general. While useful as a conceptual figure of merit, it suffers from a number of practical drawbacks that compromise its value as a standard test in manufacturing or maintenance.
R. Hassun, M. Flaherty, R. Matreci, M. Taylor   +3 more
openaire   +1 more source

Measurement, Analysis, and Understanding of the Error Vector Magnitude (EVM) of Navigation Signals

Journal of the Institution of Electronics and Telecommunication Engineers, 2018
The Navigation payload onboard the navigation satellite mainly contains the data transmitters used to broadcast the navigation messages at L band and S band carriers towards the user's community.
M. Wara, R. M R, Kodandaram M., Bhuvaneshwari M. S.   +3 more
semanticscholar   +1 more source

Traceable measurement of Error Vector Magnitude (EVM) in WCDMA signals

2007 International Waveform Diversity and Design Conference, 2007
This is the first report of a methodology to provide national standards traceability for EVM measurement of WCDMA RF sources using waveform metrology techniques. The method uses sampling oscilloscopes or real-time digital oscilloscopes. Preliminary results indicate that the rms uncertainty of the modulation waveform, at 95% confidence, is less than 0.3
David A. Humphreys, Robert T. Dickerson
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Support Vector Machine-Based Rapid Magnitude Estimation Using Transfer Learning for the Sichuan–Yunnan Region, China

Bulletin of The Seismological Society of America (BSSA), 2022
The Sichuan–Yunnan region is a seismically active area. To explore the feasibility of using the support vector machine (SVM) method for magnitude estimation in the area and to improve the rapid magnitude estimation accuracy, we construct an SVM ...
Jingbao Zhu, Shanyou Li, Qiang Ma, B. He, Jindong Song   +4 more
semanticscholar   +1 more source

Replacing Error Vector Magnitude Test with RF and Analog BISTs

IEEE Design & Test of Computers, 2011
RF and analog BIST techniques are capable of replacing the traditional error vector magnitude (EVM) test used in production. In a case study, four BISTs detected actual production faults in a commercial, highly integrated WLAN device. In combination with traditional digital testing, the BISTs caught an impressive 100% of EVM failures during production ...
Dallas Webster, Rick Hudgens, Donald Lie
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Validation of Vector Magnitude Datasets: Effects of Random Component Errors

Journal of Atmospheric and Oceanic Technology, 1997
Abstract A statistically consistent and physically realistic approach for validating vector magnitude measurements is developed, based on a model for random measurement noise that explicitly satisfies a nonnegativity constraint for all “noisy” vector magnitude measurements.
openaire   +1 more source