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Test and Measurement

Waveform generation, visualization, and performance analysis

Generate waveforms and use quantitative tools to measure system performance. Use graphical utilities such as constellation and eye diagrams to visualize the effects of various impairments and corrections.

Apps

Wireless Waveform GeneratorCreate, impair, visualize, and export modulated waveforms
Bit Error Rate AnalysisAnalyze BER performance of communications systems

Functions

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biterrNumber of bit errors and bit error rate (BER)
symerrCompute number of symbol errors and symbol error rate
berawgnBER and SER for uncoded data over AWGN channels
bercodingBER for coded AWGN channels
berconfintError probability estimate and confidence interval of Monte Carlo simulation
berfadingBER and SER for uncoded data over Rayleigh and Rician fading channels
berfitFit curve to nonsmooth empirical BER data
bersyncBER for imperfect synchronization
semianalyticBER using semianalytic technique
powermeterMeasure power of voltage signal
scatterplotGenerate scatter plot
eyediagramGenerate eye diagram
plotPhaseNoiseFilterPlot response of phase noise filter block
marcumqGeneralized Marcum Q function
noisebwEquivalent noise bandwidth of digital lowpass filter
qfuncQ function
qfuncinvInverse Q function
showcommblockdatatypetableCommunications Toolbox block characteristics

Objects

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comm.ACPRMeasure adjacent channel power ratio (ACPR)
comm.CCDFComplementary cumulative distribution function (CCDF) measurements
comm.ErrorRateCompute bit or symbol error rate of input data
comm.EVMMeasure error vector magnitude
comm.MERMeasure modulation error ratio
comm.ConstellationDiagramDisplay constellation diagram for input signals
dsp.SpectrumAnalyzerDisplay frequency spectrum of time-domain signals
timescopeDisplay time-domain signals
dsp.ArrayPlotDisplay vectors or arrays

Blocks

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Error Rate CalculationCompute bit error rate or symbol error rate of input data
EVM MeasurementMeasure error vector magnitude
MER MeasurementMeasure signal-to-noise ratio (SNR) in digital modulation applications
Power MeterMeasure power of voltage signal
Constellation DiagramDisplay constellation diagram for input signals
Eye DiagramDisplay eye diagram of time-domain signal
Time ScopeDisplay and analyze signals generated during simulation and log signal data to MATLAB
Spectrum AnalyzerDisplay frequency spectrum
Waveform From Wireless Waveform Generator AppWireless waveform source exported to Simulink

Topics

Bit Error Rate Analysis Techniques

Obtain bit error rate results and statistics.

Use Bit Error Rate Analysis App

Learn how to use the Bit Error Rate Analysis app.

Use Wireless Waveform Generator App

Create, impair, visualize, and export modulated waveforms.

Adjacent Channel Power Ratio (ACPR)

Learn about ACPR Measurements.

Error Vector Magnitude (EVM)

Learn about EVM Measurements.

Scatter Plots and Constellation Diagrams

Generating scatter plots.

Visualize RF Impairments

Apply various RF impairments to a QAM signal.

Plot Signal Constellations

This example shows how to plot a PSK constellation having 16 points.

Eye Diagram Analysis

In digital communications, an eye diagram provides a visual indication of how noise might impact system performance.

Selected Bibliography for Measurements

List of references for further reading.

Featured Examples