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Receiver sensitivity is the lowest power level at which the receiver can detect an RF signal and demodulate the data. In short, it indicates the weakest signal that a receiver will be able to identify and process.
Receiver sensitivity is expressed in dBm since it represents how faint an signal can be successfully received by the receiver, the lower the power level of the signal, the better, the receiver.
Sensitivity is purely a receiver specification and is independent of the transmitter.
The typical range for receiver sensitivity of various RF modules is from -50 to -100 dBm. Different standards and technologies have different requirements for receiver sensitivity.
Bluetooth: -70 dBm to -100 dBm
Wi-Fi: -40 dBm to -80 dBm
Cellular: up to -120 dBm
LoRa: up to -130 dBm
GNSS: -140 to -165 dBm
ZigBee: -85 to -92 dBm
Rx_Sens(dBm) = -174(dBm) + 10log (BW) + NF(dB) + S/N(dB)
What will be the receiver sensitivity if a receiver has a noise figure of 8 dB, channel bandwidth of 1 MHz, and the minimum SNR at the receiver output is 12 dB.
Rx_Sens(dBm) = -174(dBm) + 10log (BW) + NF(dB) + S/N(dB)
= -174 (dBm) + 60 (dB) + (8 (dB) + 12 (dB)
= -94dBm
Негізгі бет Ғылым және технология What is Receiver Sensitivity: Exploring the Minimum Signal Detection Level of Received Signal.
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