Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: adison on June 23, 2009, 09:40:25 AM

Title: MIMO communication
Post by: adison on June 23, 2009, 09:40:25 AM

Hallow friends
I take some receivers from remote control cars that work in frequency 27 MHZ
Every transmitter control only his receiver
For every receiver I add other antennas and I supply the right voltage
I put all the receivers in one big receiver that have a lot of antennas and switches
The problem is that the robot receive signal only when the antennas are very close
Why this happen ?
How I can large the range of receiver and transmitter
Thanks
adison

Title: Re: MIMO communication
Post by: Razor Concepts on June 23, 2009, 11:50:48 AM

Quote from: adison on June 23, 2009, 09:40:25 AM

I put all the receivers in one big receiver that have a lot of antennas and switches

Having multiple receivers in close proximity is a bad idea, especially if they are all running near the 27mhz band.

Quote from: adison on June 23, 2009, 09:40:25 AM

For every receiver I add other antennas and I supply the right voltage

Most likely all of the antennas are getting slightly different signals (since they are in different locations), and all those different signals combine together and the receiver gets confused. You cannot add more antennas to get better range on something like this.

Title: Re: MIMO communication
Post by: SmAsH on June 23, 2009, 02:26:57 PM

Quote

How I can large the range of receiver and transmitter

get a stronger transceiver pair?

Title: Re: MIMO communication
Post by: Soeren on June 26, 2009, 04:57:59 AM

Quote from: SmAsH on June 23, 2009, 02:26:57 PM

Quote

How I can large the range of receiver and transmitter

get a stronger transceiver pair?

Get a more selective transceiver pair!