View Full Version : Difference between Eb/No and Ec/No
telecom.santosh
2011-10-17, 08:54 PM
What is difference between Eb/No and Ec/No?
haryarin
2011-10-17, 08:58 PM
What is difference between Eb/No and Ec/No?
Eb/N0 = Bit Energy to Noise Density
Ec/N0 = Carrier to noise Ratio
haryarin
2011-10-17, 09:01 PM
What is difference between Eb/No and Ec/No?
Also see the below address :
http://www.finetopix.com/live-optimization/8836-ec-no-eb-io.html
hudiemiss
2011-10-17, 09:12 PM
What is difference between Eb/No and Ec/No?
just as the name implies, Ec is the energy of the chips,
Ec/No =RSCP/RSSI, Ratio of energy per modulating bit to the noise spectral density.
Eb/No: Energy per bit to noise power density ;
that is, Ec is the Energy received before despreading spectrum and not to demodulate;
but Eb is the energy received after despreading spectrum and be demodulated;
so, Ec/No may be a negative number, but the Ec/No must be a positive number.
firstmaxim
2011-10-17, 09:49 PM
What is difference between Eb/No and Ec/No?
[Eb/No]dB = [Processing Gain]dB + Ec/Io dB
Ec/Io is measured before despreading at the receiver. Eb/No is the energy per bit to noise spectral density, at the output of the receiver. Eb/No is higher than Ec/Io due to the processing gain, which is equal to the amount of spreading the user data has undergone at the transmit end.
Processing Gain = [Spreading Factor ] dB = [Chip rate/gross user data rate] dB
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