5G Waveform plotting

I tried to generate a 5G waveform using 5G waveform generator in MATLAB using the customized option. I mean I am trying to generate a waveform with only reference signals without any data channels for a radar application. Now, I dont know how to visualize the waveform. When i export the waveform to workspace I get a long array of complex numbers. But, since I am trying to exploit 5G NR signals for a radar application I want to know the physical description of the signal like is it a chirp or FMCW as I want to do a sensing experiment. I want to know how does the waveform look like, its repetition frequency everything needed for a radar aspect. Can anyone help me to process the waveform generated in app to a final transmit signal waveform. I also cannot able to connect between the resource grid in 5G to a final analog signal. How is the process done? I could explain better if someone could really help.

Answer 1

[Naren]

Hello Balaji,

I understand you want to know the physical description of the waveform for some radar application. Instead you are getting some random complex numbers. Here's a possible solution.

Use MATLAB's built-in plot and stem functions to plot the in-phase and quadrature-phase components of the complex waveform in order to see it. You can examine the characteristics of the waveform, such as its bandwidth, centre frequency, and duration, to get a physical description of the signal.

You must use the 5G signal processing chain, which includes digital modulation, up conversion, filtering, and amplification, to connect the resource grid in 5G to an output analogue signal. These procedures can be carried out using built-in functions from the MATLAB 5G NR Toolbox.

You might need to adjust the signal processing chain for a radar application to meet your unique needs. For instance, you might need to employ a different modulation scheme, use particular filtering methods, or change the signal's power level.

Hope this resolves your issue.

[Balaji Ramesh Sri]

Could you guide me how to do 5G signal processing chain in 5G toolbox because I didnt see anything other than configuration of the resource grid in 5G toolbox. How to do the processing chain as you mentioned to visualize the analogue signal. I have tried to remove the data channels and generated only reference signals for my radar application(assuming I have configured my resource grid). And, I have also exported the waveform to my matlab workspace and I tried plot the waveform using inbuilt functions but I couldnt able to infer anything from it, I want to visualize my final signal that I will transmit in the radar case. Guide me to transmit the signal to a FMCW or a chirp signal because these are the kind of signals that are used for a radar application.