Search results for "Fading"

showing 10 items of 155 documents

On the Statistical Properties of Capacity Outage Intervals in OSTBC-MIMO Rayleigh Fading Channels

2016

This paper deals mainly with the study of the asymptotic probability density functions (PDFs) of the outage durations of the instantaneous capacity of orthogonal space-time block code (OSTBC) multiple-input multiple-output (MIMO) systems over Rayleigh channels. Drawing upon known statistical properties for the asymptotic behavior of chi-squared processes at low levels, we provide approximate solutions for the PDF, the cumulative distribution function (CDF), and the $k$ th-order moments of the outage intervals of the underlying capacity processes. Then, as an application of the derived PDF, the performance assessment of capacity simulators is reported. Following this, we introduce the newly …

Block codeAsymptotic analysisStochastic processApplied MathematicsCumulative distribution functionMIMO020302 automobile design & engineering020206 networking & telecommunicationsProbability density function02 engineering and technologyComputer Science ApplicationsChannel capacity0203 mechanical engineeringStatistics0202 electrical engineering electronic engineering information engineeringApplied mathematicsElectrical and Electronic EngineeringComputer Science::Information TheoryRayleigh fadingMathematicsIEEE Transactions on Wireless Communications
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An asymptotic approximate solution to the distribution of the capacity outage intervals in OSTBC-MIMO Rayleigh fading channels

2013

This paper deals with the study of asymptotic probability density functions (PDFs) of the outage durations of the instantaneous capacity (also referred to as the mutual information) in orthogonal space-time block code (OSTBC) transceiver systems over multiple-input multiple-output (MIMO) Rayleigh fading channels. The Rayleigh fading subchannels are assumed to be frequency-nonselective and mutually uncorrelated, whereas the associated Doppler power spectral density is supposed to be symmetric about the origin. In addition, the channel state information (CSI) is considered to be available only at the receiver side. Taking these assumptions into account, and drawing upon known statistical prop…

Block codeChannel capacityApproximation theoryChannel state informationStatisticsMIMOProbability distributionApplied mathematicsProbability density functionComputer Science::Information TheoryMathematicsRayleigh fading2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
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Exact Closed-Form Expressions for the Distribution, the Level-Crossing Rate, and the Average Duration of Fades of the Capacity of OSTBC-MIMO Channels

2009

Article from the journal: IEEE Transactions on Vehicular Technology Official site: http://dx.doi.org/10.1109/TVT.2008.927038 This paper deals with some important statistical properties of the channel capacity of multiple-input-multiple-output (MIMO) systems with orthogonal space-time block code (OSTBC) transmission. We assume that all the subchannels are uncorrelated. For OSTBC-MIMO systems, exact closed-form expressions are derived for the probability density function (PDF), the cumulative distribution function (CDF), the level-crossing rate (LCR), and the average duration of fades (ADF) of the channel capacity. Furthermore, it will be shown that these exact closed-form expressions can be …

Block codeComputer Networks and CommunicationsCumulative distribution functionMIMOAerospace EngineeringProbability density functionChannel capacitysymbols.namesakeControl theoryVDP::Technology: 500::Information and communication technology: 550::Telecommunication: 552Automotive EngineeringsymbolsApplied mathematicsProbability distributionFadingElectrical and Electronic EngineeringGaussian processComputer Science::Information TheoryMathematicsIEEE Transactions on Vehicular Technology
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Performance Analysis of STBC-OFDM Systems in Temporally or Spatially Correlated Fading Channels

2010

This paper analyzes the performance of space-time block coded orthogonal frequency division multiplexing (OFDM) systems. In our analysis, we abandon the usually made assumption of quasi-static channel conditions. Instead of this, we consider the more general and realistic case that the channel envelope changes during two consecutive transmission time slots. In addition, we take the spatial correlation between sub-channels into account. We first present a general formal expression for the bit error probability (BEP), from which we find analytical solutions for the BEP not only for temporally fading channels but also for spatially correlated channels. The knowledge of the obtained analytical …

Block codeSpatial correlationComputer sciencebusiness.industryOrthogonal frequency-division multiplexingData_CODINGANDINFORMATIONTHEORYSpace–time block codeSignal-to-noise ratioFadingWidebandTransmission timeTelecommunicationsbusinessAlgorithmComputer Science::Information TheoryCommunication channel2010 IEEE Wireless Communication and Networking Conference
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The Influence of Spatial Correlation and Severity of Fading on the Statistical Properties of the Capacity of OSTBC Nakagami-m MIMO Channels

2009

This paper deals with the analysis of statistical prop- erties of the capacity of spatially uncorrelated orthogonal space- time block coded (OSTBC) Nakagami-m multiple-input multiple- output (MIMO) channels. We have derived exact closed-form expressions for the probability density function (PDF), cumula- tive distribution function (CDF), level-crossing rate (LCR), and average duration of fades (ADF) of the channel capacity. We have also investigated the statistical properties of the approximated capacity of spatially correlated OSTBC Nakagami-m MIMO channels. The results are studied for different values of the fading parameter m, corresponding to different fading conditions. It is observed …

Block codeSpatial correlationCumulative distribution functionMIMONakagami distributionProbability density functionChannel capacityChannel codingChannel capacityVDP::Technology: 500::Information and communication technology: 550::Telecommunication: 552StatisticsMIMO communicationFadingComputer Science::Information TheoryMathematicsVTC Spring 2009 - IEEE 69th Vehicular Technology Conference
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Optimal Sampling Period and Required Number of Samples for OSTBC-MIMO Rayleigh Fading Channel Capacity Simulators

2014

The purpose of this paper is to contribute to the performance assessment of channel capacity simulators. Here, we consider the instantaneous capacity (also referred to as the mutual information) in orthogonal space-time block code (OSTBC) transceiver systems over multiple-input multiple-output (MIMO) Rayleigh fading channels. To ensure that the level-crossing rate (LCR) of the instantaneous capacity can efficiently and accurately be simulated, we derive closed-form approximate solutions to the optimal sampling period and the required number of samples to be generated. Several numerical examples will be presented to illustrate the usefulness of our procedure. It will also be shown that the d…

Block codesymbols.namesakeSpatial correlationChannel capacityControl theoryMIMOsymbolsMutual informationTransceiverGaussian processComputer Science::Information TheoryRayleigh fadingMathematics2014 IEEE 80th Vehicular Technology Conference (VTC2014-Fall)
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On the spectral moments of non-WSSUS mobile-to mobile double-Rayleigh fading channels

2017

This paper deals with the mathematical analysis of the spectral moments of non-wide-sensestationary uncorrelated-scattering (non-WSSUS) mobile-to-mobile (M2M) double-Rayleigh fading channels. The point of departure is a recently proposed geometry-based statistical model (GBSM) for M2M double-Rayleigh fading channels from which general analytical expressions are derived for the average Doppler shift, Doppler spread, average delay, and delay spread. Closed-form solutions of such expressions are presented for the particular case of the geometrical two-rings scattering model. The obtained results indicate that the average Doppler shift and Doppler spread are directly influenced by not only the …

Carrier signalComputer scienceScatteringBandwidth (signal processing)020206 networking & telecommunications020302 automobile design & engineering02 engineering and technologyCommunications systemDelay spreadsymbols.namesake0203 mechanical engineeringComputer Science::Networking and Internet Architecture0202 electrical engineering electronic engineering information engineeringsymbolsFadingStatistical physicsDoppler effectComputer Science::Information TheoryRayleigh fadingCommunication channel2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
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On the statistical properties of the capacity of OSTBC Nakagami-lognormal MIMO channels

2010

This article presents a thorough statistical analysis of the capacity of orthogonal space-time block coded (OSTBC) Nakagami-lognormal (NLN) multiple-input multipleoutput (MIMO) channels. The NLN channel model allows to study the joint effects of fast fading and shadowing on the statistical properties of the channel capacity. We have derived exact analytical expressions for the probability density function (PDF), cumulative distribution function (CDF), level-crossing rate (LCR), and average duration of fades (ADF) of the capacity of NLN MIMO channels. It is observed that an increase in the MIMO dimension1 or a decrease in the severity of fading results in an increase in the mean channel capa…

Channel capacityCumulative distribution functionMIMOLog-normal distributionStatisticsFadingNakagami distributionProbability density functionStandard deviationComputer Science::Information TheoryMathematics2010 4th International Conference on Signal Processing and Communication Systems
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The Influence of the Severity of Fading and Shadowing on the Statistical Properties of the Capacity of Nakagami-Lognormal Channels

2008

This paper deals with the study of the statistical properties of the capacity of Nakagami-lognormal (NLN) channels for various fading environments. Specifically, the impact of shadowing and the severity of fading on the channel capacity is investigated. We have derived analytical expressions for the probability density function (PDF), cumulative distribution function (CDF), level-crossing rate (LCR), and average duration of fades (ADF) of the channel capacity. These results are analyzed for different levels of shadowing and for various fading conditions, corresponding to different terrestrial environments. It is observed that the severity of fading and shadowing has a significant influence …

Channel capacityFading distributionComputer scienceCumulative distribution functionLog-normal distributionStatisticsNakagami distributionFadingComputer Science::Information TheoryCommunication channelRayleigh fadingIEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference
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On the statistical properties of the capacity of double Hoyt fading channels

2010

The statistical properties of the capacity of narrowband double Hoyt fading channels are studied. Toward this end, analytical expressions for the probability density function (PDF) and cumulative distribution function (CDF) of the instantaneous channel capacity process are derived. Furthermore, for the characterization of the dynamical behavior of the time-varying channel capacity, expressions are provided for the level-crossing rate (LCR) and the average duration of fades (ADF). Since the double Rayleigh fading channel is a special case of the double Hoyt model, it is shown that the derived expressions can be reduced to the corresponding results already known for the capacity of the double…

Channel capacityFading distributionNarrowbandChannel state informationCumulative distribution functionMIMOComputer Science::Networking and Internet ArchitectureElectronic engineeringFadingStatistical physicsComputer Science::Information TheoryRayleigh fadingMathematics2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
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