What does a receiver noise floor of -174 dBm represent?
The receiver noise is 6 dB above the theoretical minimum
The theoretical noise in a 1 Hz bandwidth at the input of a perfect receiver at room temperature✓Richtige Antwort
The noise figure of a 1 Hz bandwidth receiver
The receiver noise is 3 dB above theoretical minimum
Erklärung
The figure −174 dBm is the thermal noise power available in a 1 Hz bandwidth at room temperature, which is the floor a perfect receiver would show. It is the theoretical reference itself rather than a level a fixed number of dB above one.