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Baseband File Reader

Read baseband signals from file

  • Baseband File Reader block

Communications Toolbox / Comm Sources


The Baseband File Reader block reads a signal from a baseband file. A baseband file is a specific type of binary file written by the Baseband File Writer block. Baseband signals are typically downconverted from a nonzero center frequency to 0 Hz. The block automatically reads the sample rate, center frequency, number of channels, and any descriptive data.



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Baseband signal, returned as a scalar, vector, or matrix. The signal is read from the file specified by the Baseband file name parameter. The sample time is either inherited from the file or can be set by the Sample Time (s) parameter.

Data Types: double
Complex Number Support: Yes

End-of-file indicator, returned as a logical scalar. The output is true when the Repeatedly read the file parameter is false and the entire file has been read. To enable this port, select the Output end-of-file indicator parameter.


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Specify the name of the baseband file as a character vector.

Click Browse to locate the baseband file you want to read. Click File Info to display this information:

  • File name

  • Sample rate

  • Center frequency

  • Number of samples

  • Number of channels

  • Data type

  • Any metadata fields

Select this check box to inherit the sample time from the file specified by Baseband file name.

Specify the block sample time in seconds as a positive scalar. To enable this parameter, clear the Inherit sample time from file check box.

Number of samples per output frame, specified as a positive integer or Inf. When this parameter is Inf, the output frame contains all of the samples in the baseband file.

Select this check box to repeatedly read the contents of the baseband file. When the end of the file is reached:

  • The block outputs zeros, if the Repeatedly read the file parameter is not selected (off).

  • The block outputs samples from the beginning of the file, if the Repeatedly read the file parameter is selected (on).

Type of simulation to run, specified as Code generation or Interpreted execution.

  • Code generation — Simulate the model by using generated C code. The first time you run a simulation, Simulink® generates C code for the block. The model reuses the C code for subsequent simulations unless the model changes. This option requires additional startup time, but the speed of the subsequent simulations is faster than with the Interpreted execution option.

  • Interpreted execution — Simulate the model by using the MATLAB® interpreter. This option shortens startup time, but the speed of subsequent simulations is slower than with the Code generation option. In this mode, you can debug the source code of the block.

For more information, see Simulation Modes (Simulink).

Block Characteristics

Data Types

double | integer | single

Multidimensional Signals


Variable-Size Signals


Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2016b

See Also