Does a Sinc Pulse in Time Domain Resist Intersymbol Interference?

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A sinc pulse in the time domain can effectively resist intersymbol interference (ISI) if transmitted through a channel with sufficient bandwidth. The relationship between the sinc pulse and a rectangular pulse in the frequency domain is crucial; if the channel's bandwidth exceeds the rectangular pulse's width, ISI is avoided. The condition for no ISI is met when the summation of shifted sinc functions at the bit rate remains constant. Properly aligning the pulses ensures that the peak of one pulse aligns with the zero crossings of others, preventing interference. Therefore, a sinc pulse can indeed satisfy the condition for no ISI under the right circumstances.
oufa
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please can anyone tell me urgently is the sinc pulse in time domain apulse which resist intersymbol interference or not ?
i know that sinc is infinite given in frequency domain but is the condition of no ISI satisfied which is
summation of shifted sincs by the bit rate value must be aconstant value
is this right or not ?
 
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Hey oufa,

I believe you have got something wrong. A sinc in the time domain corresponds to a rectangular pulse in the frequency domain. So if you transmit a sinc pulse in time, into a channel whose bandwidth is larger than the rectangle in the frequency domain, there would be no ISI.

You can think of this as sending the pulses such that the peak of one pulse would reside at the zero of other pulses, causing no ISI, as you said.

Regards,
Mohammed Omar
 

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