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Example: Using the Theoretical Panel in BERTool

This example illustrates how to use BERTool to generate and plot theoretical BER data. In particular, the example compares the performance of a communication system that uses an AWGN channel and QAM modulation of different orders.

Running the Theoretical Example

  1. Open BERTool and go to the Theoretical panel.

  2. Set parameters as shown below.

  3. Click Plot.

    BERTool creates an entry in the data viewer and plots the data in the BER Figure window. Even though the parameters above requested that Eb/N0 go up to 18, BERTool plots only those BER values that are at least 10-8.

  4. Change the Modulation order parameter to 16 and click Plot.

    BERTool creates another entry in the data viewer and plots the new data in the same BER Figure window (not pictured).

  5. Change the Modulation order parameter to 64 and click Plot.

    BERTool creates another entry in the data viewer and plots the new data in the same BER Figure window.

  6. To recall which value of Modulation order corresponds to a given curve, click the curve; BERTool responds by adjusting the parameters in the Theoretical panel to reflect the values that correspond to that curve.

  7. To remove the last curve from the plot (but not from the data viewer), clear the check box in the last entry of the data viewer in the Plot column. To restore the curve to the plot, check the check box again.

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