Wireless tranceiver modules help needed

[elockpicker]

Hello,
I'm responsible for designing a communication system for a robot,the system is supposed to send simple movement commands.
I want to use digital tranceiver modules (RFM12 for example) with AVR microcontrollers.
The robot is supposed to participate in a competition where many other robots might use the same module and the same frequency at the same time.
Many wireless modules using FSK modulation claim robustness to interference.
I need to know what does it mean "robust to interference",is it still true in a situation like a competition ???

What can I do to make sure that the robot is really robust to interference ??

Please help me.
Thank you very much

 

[dipnirvana]

Use FHSS (frequency hop spread spectrum) so that even if the channel is blocked/used by other robots you may switch to other channel and able to communicate.

 

[elockpicker]

Thank you very much sir,but as you know wireless tranceiver modules have a fixed frequency of operation (that can be changed of course, but we will loose the connection),furthermore they usually use FSK modulation.I think I can not change the fundamental properties of such modules.Is there any more feasible method ?

 

[dipnirvana]

well i haven't looked deep, but wt u can do is devide available bandwidth into the channels and use it.

 

[elockpicker]

thank you very much

 

[ctownsend]

It will help a lot if you post the datasheet of the modules you are using.

 

[elockpicker]

This is the datasheet of one possible tranceiver.