RADIO TRANSMISSION DEVICE, METHOD FOR DETERMINING MODULATION SYSTEM, AND RECORDING MEDIUM THEREFOR

摘要

The problem that a loss-of-signal caused by the switching of a modulation system using an adaptive modulation system occurs is solved. Radio transmission devices (10a, 10b) having an automatic transmission power control function of controlling the transmission power of the own station such that the received power of the counter station is maintained at a preset constant value and a function of the adaptive modulation system, which automatically switches over the modulation system according to the quality of a radio transmission path include modulation system determining circuits (14a, 14b) for switching over the modulation system using the adaptive modulation system in consideration of the allowance of the transmission power and the received power.