Read baseband signals from file
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.
Data— Baseband signal
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.
Complex Number Support: Yes
EOF— End-of-file indicator
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.
Baseband file name— Name of file from which data is read
example.bb(default) | character vector
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:
Number of samples
Number of channels
Any metadata fields
Inherit sample time from file— Select source of sample time
Select this check box to inherit the sample time from the file specified by Baseband file name.
Sample time (s)— Block sample time
1(default) | positive scalar
Specify the block sample time in seconds as a real positive scalar. To enable this parameter, clear the Inherit sample time from file check box.
Samples per frame— Number of samples in one frame
100(default) | positive integer scalar
Specify the samples per frame as a positive integer scalar.
Repeatedly read the file— Continuously loop data from file
Select this check box to repeatedly read the contents of the baseband file. If the end of the file is reached, the block exhibits this behavior:
Parameter is selected — The block outputs zeros.
Parameter is not selected — The block outputs samples from the beginning of the file.
Simulate using— Select simulation mode
Code generation(default) |
On the first model run, simulate and generate code for the block using only MATLAB® functions supported for code generation. If the structure of the block does not change, subsequent model runs do not regenerate the code.
Simulate model using all supported MATLAB functions. Choosing this option can slow simulation performance.