Sources and Sinks

Input and output signals and sequences, and file IO formats

Generate signal source data and noise to simulate communication links. Visualize and analyze the performance of your communications system simulation.

Supported file formats to process captured signals include binary baseband signal and NI™ technical data management solution (TDMS) format files. You can read data into tables or timetables by reading TDMS-files individually, or by reading collections of TDMS-files simultaneously.

Applications

Wireless Waveform Generator

Create, impair, visualize, and export modulated waveforms

Fonctions

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Sources

`randi`	Uniformly distributed pseudorandom integers
`randerr`	Generate bit error patterns
`randsrc`	Generate random matrix using prescribed alphabet
`commsrc.combinedjitter`	Construct combined jitter generator object
`commsrc.pattern`	Construct pattern generator object
`zadoffChuSeq`	Generate root Zadoff-Chu sequence
`mask2shift`	Convert mask vector to shift for shift register configuration
`shift2mask`	Convert shift to mask vector for shift register configuration
`wgn`	Generate white Gaussian noise samples

Sinks

`biterr`	Number of bit errors and bit error rate (BER)
`eyediagram`	Generate eye diagram
`scatterplot`	Display input signal in IQ-plane
`symerr`	Compute number of symbol errors and symbol error rate

TDMS-File

`tdmsread`	Read data from TDMS-file (depuis R2022a)
`tdmswrite`	Write data to TDMS-file (depuis R2022b)
`tdmsinfo`	Information about TDMS-file (depuis R2022a)
`tdmsreadprop`	Read properties as single row table from TDMS-file (depuis R2022a)
`tdmswriteprop`	Write properties to TDMS-file (depuis R2022b)

Objets

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Sources

`comm.BarkerCode`	Generate bipolar Barker code
`comm.GoldSequence`	Generate Gold sequence from set of sequences
`comm.HadamardCode`	Generate Hadamard code
`comm.KasamiSequence`	Generate Kasami sequence
`comm.OVSFCode`	Generate OVSF code
`comm.PNSequence`	Generate a pseudonoise (PN) sequence
`comm.RBDSWaveformGenerator`	Generate RDS/RBDS waveform
`comm.WalshCode`	Generate bipolar Walsh code

Sinks

comm.ConstellationDiagram Display and analyze input signals in IQ-plane

File IO

`comm.BasebandFileReader`	Read baseband signal from file
`comm.BasebandFileWriter`	Write baseband signal to file
`tdmsDatastore`	Datastore for collection of TDMS-files (depuis R2022a)

Blocs

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Sources

Barker Code Generator	Generate bipolar Barker Code
Bernoulli Binary Generator	Generate Bernoulli-distributed random binary numbers
Gold Sequence Generator	Generate Gold sequence from set of sequences
Hadamard Code Generator	Generate Hadamard code from orthogonal set of codes
Kasami Sequence Generator	Generate Kasami sequence from set of Kasami sequences
OVSF Code Generator	Generate OVSF code
PN Sequence Generator	Generate pseudonoise sequence
Poisson Integer Generator	Generate Poisson-distributed random integers
Random Integer Generator	Generate integers randomly distributed in specified range
Walsh Code Generator	Generate Walsh code from orthogonal set of codes

Sinks

Constellation Diagram	Display and analyze input signals in IQ-plane
Eye Diagram	Display eye diagram of time-domain signal (depuis R2023b)

File IO

Baseband File Writer	Write baseband signals to file
Baseband File Reader	Read baseband signals from file

Rubriques

Create Waveforms Using Wireless Waveform Generator App
Create, impair, visualize, and export modulated waveforms.
Signal Terminology
Define terms related to matrices, vectors, and scalars, as well as frame-based and sample-based processing.
Sources and Sinks
Error statistics and plotting.
Random Noise Generators in Simulink
You can generate noise for communication system modeling using the MATLAB® Function block with a random number generator.
Spreading Sequences
Comparison of spreading sequences for single and multiuser scenarios in single path and multipath environments.
Export Data to MATLAB
Sending the simulation results to the MATLAB workspace and using MATLAB to analyze the data.

Informations connexes

The NI TDMS File Format
Datastore

Exemples présentés

Multiband Signal Generation

Generate a wireless multiband signal efficiently.

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Interference Modeling

Interference modeling in a bent pipe satellite communications link.

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