c/n eb/no
Hi,
I have found the following. Hopefully it should prove useful:
C/N
It is the Carrier to Noise Ratio. This is almost what you measure with the spectrumsanalyzer (The S.A. measures (C+N)/N but C+N is very close to C as N is very low compared to C).
Eb/No is commonly used for digital carriers. Eb is the energy per information bit and No (N-Zero) is the noise in 1 Hz bandwidth.
The relation between them are:
C/N = (Eb/No)*DR/BWn , Where:
DR= Datarate (inc. overhead, ex. coding bits)
BWn = Noise bandwidth (= Occupied bandwidth * IF filterfactor (typical 1,2) )
The C/N ratio is measured in a manner similar to the way the signal-to-noise ratio (S/N) is measured, and both specifications give an indication of the quality of a communications channel. However, the S/N ratio specification is more meaningful in practical situations. The C/N ratio is commonly used in satellite communications systems to point or align the receiving dish; the best dish alignment is indicated by the maximum C/N ratio.
Eb/No
A common SNR-like figure of merit for digital communication systems, particularly those obeying Nyquist criteria. Also understood as SNR-per-bit, relates to BER for a given modulation type.
Eb is independent of bit rate - it's the energy per bit sent, regardless of the rate.
the following article should give a satisfactory explanation:
http://www.sss-mag.com/ebn0.html