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قديم 27-04-2013, 12:46 PM   #36
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افتراضي رد: ||مناقشه.. TMA..Question1.Spring 2013✿


اقتباس:
المشاركة الأصلية كتبت بواسطة YMS مشاهدة المشاركة
RELATIONSHIP BETWEEN Eb/ No AND S/ N
Eb = S/ R = (E/t) / (B/t)
Where Eb is the Energy per Bit
S is the Signal Power
R is the Bit Rate
No = N/ W
Where No is the Noise Spectral Density
N is the Noise Power
B is the Bandwidth
Hence,
Eb/ No = (S/R)/ (N/W) = (S/R) x (W/ N)
And therefore,
Eb/ No = (S/N) x (W/R)
Where (S/N) is the Signal to Noise Ratio
(W/R) is the Processing Gain
Eb/ No is the ratio of energy per bit to the noise power spectral
density. EB/ No is the measure of signal to noise ratio for a digital
communication system. It is measured at the input to the receiver
and is used as the basic measure of how strong the signal is.

http://www.wirelessapplications.com/..._S_N_Final.pdf


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