Noise versus Interference

[Mitrixsen]

Hello, everyone.

I understand that noise are signals that operate on the same frequency as, for example our Wireless signal. I just need to a clarification to how it differs with interference.

So if I understand this right, as long as the noise or the noise floor is small enough, everything should be fine. If the noise raises above a certain level to the point where it reaches a similar strength as our wireless signal, that's where it will cause interference?

That's all, thank you
David

[marce1000]

  - Noise is random in nature and typically generated in your receiver circuits, in the ionosphere or by the sun. Not many people are trying to receive noise, but there are exceptions.
    Interference is non-random in nature and typically generated by transmitters or other electrical circuits. Someone else's signal may     be your interference and vice versa. So, if you have 'big noise' then that is caused by interference (there will be a specific source)  , except for a solar flame perhaps....

    M.

[M02@rt37]

Hello David

To complete @marce1000 answer, the key factor in determining whether noise become interference is the SNR ; which is the difference between the strength of your wireless signal and the noise floor. As long as the noise floor remains low relative to your signal strength, communication should be stable. However, when the noise rises to a level where it approaches or overlaps with your signal strength, it begins to interfere with proper transmission, making it harder for devices to decode the signal accurately. So yes, you're absolutely right—if the noise remains low, everything works fine. But if it creeps up too high, and especialy near the level of your signal, that’s when it become interference and can start to impact your wireless performance...

[srimal99]

I would recommend to read about SNR,Received Signal Strength Indicator (RSSI),Noise Floor,Receive Sensitivity. Instead of explaining in detail I have attached following link which help you to understand in depth.

https://mrncciew.com/2014/10/17/cwap-spectrum-analysis/