Baseband File Reader

Read baseband signals from file

• Library:

• Communications Toolbox / Comm Sources

Description

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.

Ports

Output

Data — Baseband signal

scalar | vector | matrix

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

EOF — End-of-file indicator

logical scalar

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.

Parameters

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:

• File name

• Sample rate

• Center frequency

• Number of samples

• Number of channels

• Data type

• Any metadata fields

Data Types: char

Inherit sample time from file — Select source of sample time

on (default) | off

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

off (default) | on

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) | Interpreted execution

Code generation

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.

Interpreted execution

Simulate model using all supported MATLAB functions. Choosing this option can slow simulation performance.

Block Characteristics

Data Types	double | integer | single
Multidimensional Signals	no
Variable-Size Signals	no

Extended Capabilities

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