Simulation Result Differences Between Sample and Block Mode
I'm running into issues with different results from the output signal "sample" and "block" mode simulations. I took the standard "qpsk_qam_transceiver.icp" example, subtracted the PDs, and looked at the constellation diagrams.
In the attached picture, you can see the differences, which are quite significant. I am seeing that if I increase the "samples per bit" in sample mode, the results start to be more alike, but still not exactly the same. The "samples per bit" setting in block mode don't really matter for the results. I prefer to use block-based simulation mode and lower number of samples per bit for the speed of the simulations, but am sceptical of the results obtained. Can you explain in more details what exactly is causing the differences and how can I improve the block mode simulation to make it more realistic?