Receiver sensitivity definesReceiverThe minimum signal strength that can be received and still work normally.[1]
Sensitivity is available to maintain the minimum acceptable signal strength for normal receiver operationpowerTo represent.It can also be expressed by field strength.In brief, if the received power value in the link equation is equal to or greater than the receiver sensitivity, then the receiver can work normally, that is, the receiver can normally obtain the information contained in the transmission signal.On the contrary, if the received power is lower than the sensitivity, the quality of the information obtained will be far lower than the specified requirements.[1]
Receiver sensitivity defines the minimum signal strength that the receiver can receive and still work normally.
To maintain the minimum acceptable signal strength of the receiver,sensitivityIt can be expressed by power in dBm (usually a large negative dBm value), and it can also be expressed by field strength (mV/m).[1]
In brief, if the received power value in the link equation is greater than or equal to the receiver sensitivity, then the receiver can work normally, that is, the receiver can normally obtain the information contained in the transmission signal.On the contrary, if the receiver power is lower than the sensitivity, the quality of the information obtained will be far lower than the specified requirements.[1]
Defining points
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Although there is no unified regulation, the sensitivity of the receiving system is defined inantennaThe output port of is a common convention.If the sensitivity is defined at this point, the gain of the receiving antenna can be added to the signal power of the receiving antenna when calculating the signal power entering the receiving system.This means that when calculating the sensitivity of the receiving system, it is necessary to consider theCableLosses andPreamplifieras well asPower dividerImpact.Of course, when you purchase a receiver from a manufacturer, the manufacturer's product specification assumes that no device is connected between the antenna and the receiver - so "receiver sensitivity" is defined at the input end of the receiver.[1]
