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Regular Contributor I
Posts: 364
Registered: ‎03-02-2017

Why MIMO if antennas cannot transmit and receive simultaneously?

Hy guys,

 

My question is very simple. If antennas can only either transmit or receive at a time, why MIMO devices have separate antennas for transmitting and receiving? They are not used simultaneously.

 

Regards,

Julián

MVP
Posts: 1,409
Registered: ‎11-07-2008

Re: Why MIMO if antennas cannot transmit and receive simultaneously?

Multiple antennas can transmit and receive at the same time, colloquially we can say each antenna is a 'chain'. This has value on multiple fronts, I highly suggest you read http://www.arubanetworks.com/assets/wp/WP_80211acInDepth.pdf

Jerrod Howard
Sr. Techical Marketing Engineer
Guru Elite
Posts: 21,543
Registered: ‎03-29-2007

Re: Why MIMO if antennas cannot transmit and receive simultaneously?

It is in the wikipedia article here, first sentence:  https://en.wikipedia.org/wiki/MIMO

 

 



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Regular Contributor I
Posts: 364
Registered: ‎03-02-2017

Re: Why MIMO if antennas cannot transmit and receive simultaneously?

[ Edited ]

Hi guys,

 

Maybe I didn't explain very well. I mean, if I am transmitting, I am not going to use my receiving antennas because no one else will be transmitting at the same time, otherwise collisions will occur. And if someone is transmitting and I am using my receiving antennas to listen to, I am not going to use my transmiting antennas because I am not going to transmit at that time, otherwise collisions will occur.

 

Regards,

Julián

MVP
Posts: 1,409
Registered: ‎11-07-2008

Re: Why MIMO if antennas cannot transmit and receive simultaneously?

Everything is covered in the links provided.

Jerrod Howard
Sr. Techical Marketing Engineer
Regular Contributor I
Posts: 364
Registered: ‎03-02-2017

Re: Why MIMO if antennas cannot transmit and receive simultaneously?

Thanks Jerrod,

 

I will take a look to those links and be back if I miss anything.

 

Warm regards,

Julián

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