I am a total newbie in signal processing.
I have been trying to plot on simulink a time/frequency domain noise in PLC (Powerline Communication) that matches a real-world research "
Time Frequency Analysis of Noise Generated by Electrical Loads in PLC", however, I failed to plot such noise.
Generally speaking about my aim, I am trying to collect appliances’ noise that causes bit errors in PLC by comparing the original bit sequence with the received bit sequence. So, I need to simulate each appliance noise individually like the article mentioned above. Unfortunately, I couldn’t find any data source where I could download appliances’ noise, so I am creating my own simulation to collect my appliances’ bit-errors data. I have been able to simulate PLC using FSK modulation/demodulation with 1000 bits per second as a binary sample rate for my bit-sequence. For the FSK modulation, I have 7500 Hz as a carrier frequency for the bit-sequence to the AC channel that has 50 Hz/220 V as the typical AC source voltage, but now I am stuck on the phase of creating Appliances’ noise which has to matches real-world noise.
If anyone knows how to plot on Simulink as I don't know how to plot such signals:
- In frequency domain: background noise as high as 55dB for the measurement frequency range with the power contained up to 4MHz
- In time domain: Raise up to 45dB above the background noise floor for most of the AC cycle duration
I need to plot a huge dataset, so if anyone could help me understand how to plot such noise, I will be able to plot the rest.