METHOD AND APPARATUS FOR ADJUSTING TRANSMISSION POWER IN A TWO-WAY DEVICE BASED ON BATTERY IMPEDANCE

摘要

A method and apparatus for adjusting transmission power in a portable two-way radio device allows the device to determine an expected battery voltage drop for a subsequent transmit event, based on present transmit power settings and battery impedance, and change the power setting for the subsequent transmit event if the battery voltage is likely to drop below a shutdown threshold at the present power setting or if the expected battery voltage drop will cause the battery voltage to be substantially above the shutdown voltage level and the present power setting is below an optimal level.

主权项

1. A method for setting transmission power prior to a transmit event in a portable radio device powered by a battery having a battery voltage, comprising:
determining, by the portable radio device, a present battery impedance; determining, by the portable radio device, a battery voltage drop that will occur in response to a subsequent transmit event at a present transmission power setting, based on the present battery impedance; adjusting, by the portable radio device, the present transmission power setting to an adjusted power setting in response to determining the battery voltage drop; and subsequent to adjusting the present transmission power setting, the portable radio device transmitting at the adjusted power setting.