Effective evaluation of link quality using error vector magnitude techniques

Hassun, R.; Flaherty, Michael J.; Matreci, R.; Taylor, Michael

doi:10.1109/wcc.1997.622254

Cited by 72 publications

(37 citation statements)

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“…With the time offset,δ ≃ δ, determined, the test symbol vector is created by use of (3) and (4). In terms of algorithmic complexity, (17) is a O((K − ΘN )N 2 ) problem.…”

Section: Time Offsetmentioning

confidence: 99%

“…A related approach is described in [20], which uses the gradient method with independent step size for respectively [x 1 ; the obtained E rms values for differentx 4 . The result is presented in Fig.…”

Section: Comparison Wrt Parameter Sensitivitymentioning

confidence: 99%

“…Although not intended as a receiver performance metric it provides a fast and easy to understand metric with the advantage that a data receiver is not needed as for bit or block error rate estimations. The link between error vector magnitude and bit error rate was studied for some communication systems in the papers by Hassun et al [4], and Shafik et al [5].…”

Section: Introduction and State-of-the-artmentioning

confidence: 99%

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Robust Computation of Error Vector Magnitude for Wireless Standards

Jensen

Larsen

2013

IEEE Trans. Commun.

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The modulation accuracy described by an error vector magnitude is a critical parameter in modern communication systems -defined originally as a performance metric for transmitters but now also used in receiver design and for more general signal analysis. The modulation accuracy is a measure of how far a test signal is from a reference signal at the symbol values when some parameters in a reconstruction model are optimized for best agreement. This paper provides an approach to computation of error vector magnitude as described in several standards from measured or simulated data. It is shown that the error vector magnitude optimization problem is generally non-convex. Robust estimation of the initial conditions for the optimizer is suggested, which is particularly important for a non-convex problem. A Bender decomposition approach is used to separate convex and non-convex parts of the problem to make the optimization procedure simpler and robust. A two step global optimization method is suggested where the global step is the grid method and the local method is the Newton method. A number of test cases are shown to illustrate the concepts.

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“…With the time offset,δ ≃ δ, determined, the test symbol vector is created by use of (3) and (4). In terms of algorithmic complexity, (17) is a O((K − ΘN )N 2 ) problem.…”

Section: Time Offsetmentioning

confidence: 99%

Section: Comparison Wrt Parameter Sensitivitymentioning

confidence: 99%

Section: Introduction and State-of-the-artmentioning

confidence: 99%

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Robust Computation of Error Vector Magnitude for Wireless Standards

Jensen

Larsen

2013

IEEE Trans. Commun.

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“…One measure of packet quality is the error vector magnitude, EVM [12]. IEEE Standard 802.11b [3] requires that the worst-case peak EVM (expressed as a percentage of the square root of the mean power of an ideal signal) not exceed 35% for high data rate modes like CCK 11.…”

Section: Wind Performance and Optimizationmentioning

confidence: 99%

Wireless Intrusion Detection

Tomko¹,

Rieser²,

Buell³

et al. 2007

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“…Sin embargo, en modulaciones QAM de tipo OFDM es bastante habitual evaluar la calidad de la constelación recibida en términos de EVM [Hu07]. Además, la evaluación de la calidad del enlace en términos de EVM permite obtener un análisis más completo de la distorsión del enlace en términos como la ganancia o el ruido de fase en la transmisión, [Has97], [Geo04].…”

Section: Análisis Experimental Y Márgenes De Protección En La Coexistunclassified

Coexistencia e integración de comunicaciones inalámbricas en sistemas de transmisión ópticos.

Soler¹

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IVPersonal Area Network). L'objectiu d'aquest estudi és obtenir màrges de seguretat per a garantir la interoperatibilitat d'ambdues tecnologies ràdio, els quals es poden aplicar en el futur desenvolupament de tècniques avançades de mitigació de la interferència com detecció i exclusió (DAA, Detect-and-Avoid), dins de futures aplicacions com les anomenades cognitive radio.Després, s'estudia la coexistència de MB-OFDM UWB i WiMAX IEEE 802.16e en xarxes òptiques d'accés basades en sistemes RoF. S'avaluen dos escenaris experimentals: en el primer, s'avalua un sistema RoF amb fibra multimode, i el segon, un sistema RoF amb fibra monomode. Els resultats permeten obtenir màrges de seguretat i abast màxim per al desplegament de sistemes RoF segons els tipus de fibra. Al mateix temps, es demostra i avalua experimentalment una nova tècnica de multiplexació per divisió en polarització de la transmissió òptica, per a millorar la coexistència en sistemes RoF.Finalment, aquesta Tesi Doctoral presenta l'estudi del modulador electro-òptic Mach-Zehnder, com a peça clau que limita el marge dinàmic de les transmissions als sistemes RoF. Al mateix temps, es proposa i avalua experimentalment una tècnica òptica de linealització del modulador Mach-Zehnder que millora el marge dinàmic del sistema RoF. V AbstractCurrent network and telecommunication systems are required to provide higher data rates in access networks to an increasing number of users. This fact is mainly due to the increase in the Internet traffic data, which is related with the higher demand of online videogames and software, the increased complexity in the content of web pages, the joint distribution of audio-visual and added-value online content, and the introduction of high-definition services and contents such as video on demand, as a result of a society increasingly more interconnected. In order to satisfy these higher data rates requirements, new techniques for the joint distribution of several wireless communication systems are proposed in this Thesis. The aim of these techniques is to facilitate the deployment of an integrated access network at the customer premises, enabling the integration of optical transmission over an optical access network and radio-frequency transmission in the same infrastructure.Two main wireless communication systems are considered in this Thesis, WiMAX (Worldwide Interoperability for Microwave Access) and UWB (Ultra-Wide Band) according to WiMedia Alliance recommendation. Comparing the bit rate and expected range, WiMAX and UWB are complementary radio technologies expected to coexist in a near future in integrated access networks. The optical access network considered in this Thesis can be regarded as a FTTH network (Fibre-to-the-Home). The wireless signals are natively transmitted over optical network, that is, without frequency upconversion and remodulation stages, over one or several optical carriers. This technology, which is known as Radio-over-Fibre (RoF), is well suited for integrated access networks.First, the requirements for...

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Effective evaluation of link quality using error vector magnitude techniques

Cited by 72 publications

References 1 publication

Robust Computation of Error Vector Magnitude for Wireless Standards

Robust Computation of Error Vector Magnitude for Wireless Standards

Wireless Intrusion Detection

Coexistencia e integración de comunicaciones inalámbricas en sistemas de transmisión ópticos.

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