Simulink Performance Improvements

Performance improvements can help you achieve real-time execution. These adjustments suggest ways you can improve the performance of your SDR radio model.

Model Tuning

• Use frame-based processing. With frame-based processing, the model processes multiple samples during a single execution call to a block. Consider using frame sizes from roughly 100 to several thousand.

• In Model Configuration Parameters > Data Import/Export, turn off all logging.

• Make your model single rate. If the model requires resampling, then choose rational coefficients that keep the model single rate.

• Do not add any Buffer blocks to the model. Create convenient frame sizes in your data sources. Buffer blocks typically degrade performance.

• Avoid feedback loops. Typically, such loops imply scalar processing, which slows down the model considerably.

• Avoid using scopes. To visualize your data, send it to a workspace variable and postprocess it.

• If your model has Constant blocks with values that do not change during simulation, make sure that the sample time is set to Inf (default).