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FFE in TX (Read 3898 times)
raja.cedt
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FFE in TX
Jan 29th, 2011, 7:25pm
 
hi,
can any one please tell me the difference between pre-emphasis and de-emphasis. Little bit what i know is in pre-emphasis when signal changes from 0 to 1 swing would go higher than what it has to be.

Thanks.
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bharat
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Re: FFE in TX
Reply #1 - Feb 2nd, 2011, 7:59pm
 
FFE ( feed forward equalization) is an effort to minimize frequency dependent attenuation with the help of digital filter (FIR).
The de-emphasis increases the relative strength of high frequency content of the transmitted signal and increasing the total signal power
so that by the time data reaches RX, it has enough signal strength despite attenuation through channel.
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