- #1

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If this is correct then i want to know that if this channel cannot support full transmission rate then do we use this model ??

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- Thread starter erece
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- #1

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If this is correct then i want to know that if this channel cannot support full transmission rate then do we use this model ??

- #2

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Nyquist says that if you have a discrete signal that should transfer all relevant frequencies, you should use a sample frequency that is at least double the max relevant frequency.

- #3

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ISI is INTERSYMBOL INTERFERENCE

- #4

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My remark remains the same though.

If you have a transfer rate (as a frequency) of R, you can only transfer frequencies up to R/2 without loss of information.

Or am I misunderstanding your question?

- #5

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ok

and what can be the bandwidth of the channel in terms of R to support the transmission ?

and what can be the bandwidth of the channel in terms of R to support the transmission ?

- #6

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R/2 as Nyquist states.

- #7

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So we are sampling a signal whose frequency is R at a frequency of R/2 and which should be the minimum bandwidth of channel...

AM I RIGHT ?

- #8

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For ideal Nyquist pulses (sinc), the required bandwidth is only Rs/2 to support an Rs symbol rate

- #9

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When you want to transmit a signal using a bandwidth signal at some frequency R, what you do is, you put your signal through a low-pass filter, filtering out all frequencies above R/2.

And then you transmit the signal.

Otherwise you lose information.

- #10

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okay

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