 ##  [Nyquist ISI Criterion](/nyquist-isi-criterion) 

  ##  [Nyquist ISI Criterion](https://information.quantumdictionary.io/nyquist-isi-criterion-0) 

  
 [![Information & Communication Dictionary](/sites/default/files/styles/large/public/2026-01/Information%20%26%20Communication.png.webp?itok=g4emS-T7)](/topic-specific-dictionaries/information-communication)


**Information &amp; Communication Dictionary**

 
Definition

A pulse‑shape design condition ensuring that, after transmit filtering, channel effects and receive filtering, the combined sampling‑rate impulse response g(t) sampled at symbol intervals nT yields g(nT)=0 for all integer n≠0; equivalently, the overall system produces zero intersymbol interference (ISI) at the symbol sampling instants.