Using a pregenerated MATLAB RG and using SIONNA channel models for processing and validation and a replacement for MATLAB

[Infiltra]

So, I've been using MATLAB for quite some time now, and I find it frustrating and annoying (though it's helpful in most cases but frustrating nonetheless). But MATLAB can give RG or IQ data as a .mat file or .bin/CSV(any file where I can dump data for my preference as I wish) respectively.

What I was thinking is with that data generated from MATLAB, I can port it into SIONNA and use its channel models for getting an RX RG for some specific signals of my interest (telecom and otherwise), currently, in my code that I am working on, I am able to import that RG .mat (I am having those actual complex numbers) file using scipy, but what I am missing is how can I map this to SIONNA RG or RG mapper and use the channel for further processing and getting an RX RG and try to validate it my pass time project where I am building some channel models in C, Any help, tips, suggestions regarding this end will be really helpful. If you guys need my current script that I am working on along with the .mat file, I can send it further in this thread.

[faycalaa]

If my understanding is correct, assuming a single transmitter with a single transmit antenna, what is imported from the datafile is a complex-valued tensor of shape [batch_size, num_ofdm_symbols, fft_size]. If this is the case, and if you want to use the channel models assuming an OFDM waveform, then you would need to cast this tensor into a TensorFlow tensor, and then make it fit the expected input shape of the OFDMChannel (or ApplyOFDMChannel) classes. The data input x is expected to be complex-valued and of shape [batch size, num_tx, num_tx_ant, num_ofdm_symbols, fft_size]. Therefore, you would need to add the num_tx and num_tx_ant dimensions to allow broadcasting, using, e.g., the expand_to_rank utility. This should output a tensor of shape [batch size, 1, 1, num_ofdm_symbols, fft_size], that can be used as input to the classes implementing the OFDM channel model of Sionna.

If the RG imported from the datafile does not have a batch_size dimension, then it should also be added.