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on bluetooth Noise figure

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vivek1214

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bluetooth required snr

What is the theoritical noise figure for sensitivity of -85dBm
 

RFCMOS

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Hello,


To answer, we need to know what is the S/N (or Eb/N0) your baseband can tolerate at its input without exceeding a specific BER (defined in the norm)?
 

hmsheng

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Sensitivity = -174dBm/Hz + 10*log(BW) + NF + SNR
where, NF is the receiver chain noise figure, SNR is coresponding to the modulation type and BER specification.
 

vivek1214

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thanks for your answers, but how to decide that what SNR is required? once SNR is known it is easy to calculate NF

e.g. for sensitivity of -70dBm they generally take 23dB SNR so that NF comes to be 21dB
but whats the situation for -85dBm sensitivity
 

hmsheng

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SNR depends on the modulation type and BER required.
 

vivek1214

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can you give me details of muduation scheme and required SNR
 

khouly

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for every digital modulation scheme there is BER curve
this curve relate the SNR to the BER , by knowing the BER u can get the SNR required by the demodulator.
that's it

khouly
 

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