Hi Utkarsh,
Implementing Digital Pre-Distortion (DPD) for your Power Amplifier (PA) requires characterizing the PA using input/output data.
Steps to obtain Data with Hardware using VST:
- Setup: Connect your 'PA' to a Vector Signal Transceiver (VST). The VST acts as both a signal generator (to provide the input signal to the PA) and a signal analyzer (to capture the output from the PA).
- Data Acquisition: MATLAB's Instrument Control Toolbox provides functions to communicate with the hardware. You could generate a test signal in MATLAB, send it to 'PA' through a 'VST', and finally capture the output signal using a 'VST' https://www.mathworks.com/help/instrument/
- Save Data: Save the input and output signals into a file for further analysis and DPD model development.
% Assuming you have the necessary toolboxes and drivers installed
vst = vstInit('IPAddress', '192.168.1.100'); % Initialize VST with its IP
inputSignal = generateTestSignal(); % Custom function to generate your test signal
vst.downloadSignal(inputSignal); % Send signal to PA via VST
outputSignal = vst.captureSignal(); % Capture output from PA
save('PA_IO_Data.mat', 'inputSignal', 'outputSignal'); % Save data for analysis
Steps to obtain Data without Hardware by simulating PA:
- PA Model: Develop a model of your 'PA' in MATLAB based on its specifications. This could involve using MATLAB's RF Toolbox or directly implementing mathematical models of the PA's behavior (e.g., AM/AM, AM/PM conversion characteristics).
- Simulation: Generate the same test signal as you would in the hardware scenario. Pass this signal through your PA model to simulate the output.
- Save Simulated Data: Save both the input test signal and the simulated output for DPD development.
inputSignal = generateTestSignal(); % Your test signal
outputSignal = simulatePA(inputSignal); % Custom function to simulate PA output
save('PA_IO_SimulatedData.mat', 'inputSignal', 'outputSignal'); % Save data
Both approaches will provide you with the necessary input/output data for PA characterization, which is crucial for DPD implementation. The choice between hardware-based characterization and simulation depends on available resources and how closely you wish to mimic real-world conditions.
Hope that Helps!
Balavignesh
