- Generate an Analog Message Signal: You can use the Sine Wave block to generate an analog signal. Find it in the Library Browser under Sources. Drag and drop the Sine Wave block into your model.
- Convert Analog Signal to Digital Bits: Use the Analog to Digital Converter (ADC) block from the Data Converter library. Connect the output of the Sine Wave block to the input of the ADC block.
- Source Encoding: Source encoding in Simulink can be a bit abstract since it typically involves algorithmic compression or formatting. You may simulate this by simply ensuring your data is in a binary format. Consider using a MATLAB Function block for custom encoding scripts.
- Channel Encoding: Channel encoding adds redundancy for error correction. You can use "General CRC Generator" Simulink block for cyclic redundancy check (CRC) code bits for each input data frame . For more information on this, consider going through the Error Detection and Correction documentation (https://mathworks.com/help/comm/ug/error-detection-and-correction.html).
- Pulse Modulation: For pulse modulation, you can use blocks like Pulse Generator or a PWM Generator from the Sources or SimPowerSystems library, respectively. Adjust the parameters according to the modulation scheme you're interested in (e.g., PAM, PWM).
- Bandpass Modulation: Lastly, to perform bandpass modulation, you might use the Modulator block found under Communications System Toolbox. Choose a modulation scheme (e.g., QAM, PSK).
- Demodulate the Signal: Use a corresponding Demodulator block from the Communications System Toolbox.
- Pulse Demodulation: Depending on your pulse modulation scheme, you'll need to appropriately process the signal to demodulate it.
- Channel Decoding: Use blocks a corresponding decoder from the Error Detection and Correction library.
- Source Decoding: If you implemented a specific source encoding, reverse that process here, potentially using a MATLAB Function block for custom decoding logic.
- Digital to Analog Conversion (DAC): Finally, use a Digital to Analog Converter block to convert the digital signal back to an analog format.