Hi Jianbin,
As per my understanding of the case, you can achieve the desired custom LTE waveform configuration by using MATLAB's LTE System Toolbox. The toolbox provides functions and tools to generate and modify LTE waveforms according to your specific requirements.
To create an LTE waveform with only the pilots, signaling, and control signals while turning off the data subcarriers, you can follow these steps:
1. Generate a basic LTE waveform using the LTE Waveform Generator app or the `lteRMCDL` function. This will create a waveform with all the necessary LTE components, including data subcarriers.
2. Use the `lteDLResourceGrid` function to access the resource grid of the generated waveform. The resource grid is a matrix that represents the LTE symbols and subcarriers.
3. Set the data subcarriers to zero in the resource grid. You can achieve this by assigning zero values to the corresponding elements of the resource grid matrix.
4. Modify the resource grid to include only the pilot symbols, signaling, and control signals. You can use the `ltePSS`, `lteSSS`, `lteCellRS`, and other related functions to generate the required pilot and reference signals.
5. Use the `lteOFDMModulate` function to convert the modified resource grid back into the time-domain waveform.
You can refer to the following documentations for this:
Thanks
