RF interference between 2 radios

Clarifications

Often, they can advise you much better than the IT community can, since local conditions would have an effect on anything you're looking at.

We are talking about 802.11b/g 2.4GHz WLAN gear?
Range from 300-3200 meters?
Not sure what the max transmit power is there, EIRP under this scenario for a ptmp link would be around 5W to give you a 10dB link budget, that?s a LOT of power!!!!
Remember that this is the same frequency that a microwave operates on, I hope that no one will be operating near the mobile antenna.
As to the question I think your asking, if the answer to my questions are affirmative then both radios will be operating on the same channel on the same frequency in a CSMA/CA environment. While you will always see retries on a WLAN these are normal and not considered interference, like say a microwave or cordless phone.

Hopes this helps!

If you are working with 802.11b, there are three non-overlapping channels, as defined by US standards, channels 1, 6, and 11:
(2.412, 2.437, and 2.462 mhz).

For all intents and purposes, the ERP should not matter, as long as the frequencies do not overlap.

From a practical perspective, the range of a 802.11b mobile device is limited to around 200-300m. while it may be possible to create a point-to-point fixed link of several miles, this would be achieved with high-gain fixed directional antennas.

The typical RF output of an 802.11b mobile device is between 30mw and 100mw. While there are some 200mw radios, these are not often used in portable devices due to their high power consumption. Therefore the range of a typical mobile device is 200-300 meters, and possibly less in a more difficult environment such as a factory or warehouse.