Solid state lamp

摘要

A method of reducing power consumption of power amplifiers in Customer Premises Equipment (CPE) is disclosed. The power amplifier is evaluated and the Error Vector Magnitude (EVM) performance of the amplifier is modeled to obtain optimal bias voltage for the amplifier for a given modulation scheme and input signal power level. The method comprises of checking Error Vector Magnitude (EVM) for present bias and present input signal power levels of the power amplifiers, calculating optimal bias voltage for required modulation and coding scheme and biasing the power amplifier with the optimal bias voltage. The optimal bias voltage for the power amplifier can be determined either by using mathematical equations or using a look-up table.