mrinalmani
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Hi!
Radio transceiver ICs mention their receiver sensitivity and transmitter power level. Example -120db/20db.
However they do not mention the acceptable SNR. My concern is that if I were to make use of LNA to increase the overall receiver sensitivity, then to what extent would the noise injected by the LNA degrade performance?
For example if I insert a LNA with 20dB gain and 3dB noise figure, then although it will increase the sensitivity, nevertheless it will also inject 3dB noise. Will this effectively improve the range of communication (due to added gain) or will it reduce the range (due to added noise)?
To what extent can noise be added? The transceiver ICs do not mention acceptable SNR. Or is there some indirect method to evaluate the SNR?
Thank you
Radio transceiver ICs mention their receiver sensitivity and transmitter power level. Example -120db/20db.
However they do not mention the acceptable SNR. My concern is that if I were to make use of LNA to increase the overall receiver sensitivity, then to what extent would the noise injected by the LNA degrade performance?
For example if I insert a LNA with 20dB gain and 3dB noise figure, then although it will increase the sensitivity, nevertheless it will also inject 3dB noise. Will this effectively improve the range of communication (due to added gain) or will it reduce the range (due to added noise)?
To what extent can noise be added? The transceiver ICs do not mention acceptable SNR. Or is there some indirect method to evaluate the SNR?
Thank you