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Post by trunutsa on Oct 4, 2011 20:23:08 GMT -5
Hi
How to find the noise variance of the awgn channel? what is the relationship between eb/no, nose variance and snr?
Trunutsa
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Post by charan langton on Oct 19, 2011 23:52:36 GMT -5
Each device such as a receiver adds thermal noise to a signal. The way this is determined is by injecting a known signal and then measuring its power. The added power is presumed to be from noise.
To know the eb/N0 of a signal, you have to know the analog signal power reaching the device and the amount of thermal noise it produce (from the above test). Then you just divide C by N0 (which is N/B) and there you have the C/N0. From here divide by bit rate and you get eb/N0.
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