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# Ec/Io, Ec/No, Eb/No, Eb/Nt ...... ?

1. ## ec/io

Ec/Io, Ec/No, Eb/No, Eb/Nt ......
What is the mean ?

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2. ## ec/n0

we have the signal power=P

the chip rate=W

the user bit rate=R

the noise=PN

the interference= I (interference between users)

Ec=P/W
Io=I/W
N0=(I+PN)/W
Eb=P/R

actually i don't know what is Nt!!!!!

i hope this is what you are looking for

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3. ## ec/i0

Ec/I0 => In CDMA refers to the portion of the RF signal which is usable. It's the difference between the signal strength and the noise floor.

Eb/N0=> Bit Energy-to-Noise Density

Bit Energy-to-Noise Density(Eb/N0) is the ratio of bit energy to noise density. This value is used to specify the lower limit of operation in most digital communications systems and is also used to measure radio channel performance.

Ec/N0 = Carrier-to-noise Ratio

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4. ## eb/nt

Nt probably stands for thermal noise, that is Noise thermal (in subscript).

5. ## ec io

hi
take a look at this topic :

http://www.edaboard.com/ftopic145323.html