For a clear and accurate view of the result, plot a logarithmic average graph. About the values themselves: The thermal noise floor is -174 dBm/Hz, which gives a theoretical and expected noise level of noise level of -120 dBm because -174 dBm/Hz gives -123 dBm/125 kHz + 3 dBm of Noise Factor = -120 dBm
The RSSI measured by the Base Station should not be even lower than the thermal noise floor (around -120dBm). Probably a measurement issue on the Base Station. -120 to -110 dBm: excellent result. No signal or interferences around the Base Station. -110 to -100 dBm: very good result. Very few interferences around the Base Station.
The thermal noise floor is -174 dBm/Hz, which gives a theoretical and expected noise level of noise level of -120 dBm because -174 dBm/Hz gives -123 dBm/125 kHz + 3 dBm of Noise Factor = -120 dBm The lower the RSSI measured by the Base Station, the better. Following are some reference values for channels using 125 kHz bandwidth:
The receiver noise floor, determined by the thermal noise generated in the receiver’s termination, therefore sets a lower bound on the field strength that can be measured (see Figure 7.8 ). The standard measurement bandwidth above 1GHz is normally 1MHz as a compromise between measurement speed and noise floor.
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