What is relation between PMI and RI?

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Dang N. H. Thanh Popular answer

This might be helpful https://www.scribd.com/doc/295073985/Lte-Cqi-vs-Pmi-vs-Ri-Difference-Between-Lte-Cqi-Pmi-Ri

William Courtney

These pages answer your question pretty well, I think. Re-phrasing them would just add noise, so I’ll add the links instead:

http://www.researchgate.net/post/What_is_CQI_PMI_RI_in_LTE/amp. (several answers, the first answer may be the most useful to you)

Also this page:

http://www.rfwireless-world.com/Terminology/LTE-CQI-vs-PMI-vs-RI.html

Best to you.

Dang N. H. Thanh