Is there a reference or a tutorial to simulate a generic transmitter in Omnet++ that transmits noise on a particular frequency? Basically, it is just a simple jammer that disturb the channel by sending random noise (no MAC layer, no Network layer, nothing).
Yes, there is the NoiseSource module that does this. It is available since INET 4.2:
This showcase has more info:
https://inet.omnetpp.org/docs/showcases/wireless/analogmodel/doc/index.html
In order to solve this problem, you need to install Omnet, and install manually Inet by cloning the repository from GitHub: https://github.com/inet-framework/inet.