A study on compatibility between ZigBee devices in multiple integrated laser engagement system

The RF transceivers in MILES are used to trigger firing or communicate informations about the conditions of soldier and weapons. These transceivers have characteristics of low data rate and low power consumption for short range communication on the human body. Therefore, ZigBee devices are the best candidates for this kind of application. Although a ZigBee device operates under very low radiation power, the effect of interference between devices apparently exist. Especially, if soldiers with multiple RF transceivers are crowded in one place, each soldier with the RF transceiver acts as an interferer. When the effect of interference is serious, reliability of communication is degraded. In this paper, minimum permissible separation distance is determined for the compatibility between the RF transceivers of two soldiers. For the simulation, the real minimum output power of the transmitter of a soldier is measured.