PROCESSO DE REDUÇÃO DA RAZÃO DE ENERGIA DE PICO PARA MÉDIA EM UM SINAL DE FREQÜÊNCIA DE RÁDIO, E, TRANSMISSOR DE PREQÜÊNCIA DE RÁDIO FORNECENDO UMA RAZÃO REDUZIDA DE ENERGIA DE PICO PARA ENERGIA MÉDIA EM UM SINAL DE FREQÜÊNCIA DE RÁDIO

摘要

This invention provides a method for reducing peak to average power ratio in a radio frequency signal. The method comprises the steps of modulating a plurality of sub-carriers with a plurality of data symbol vectors to produce a first modulated signal; limiting the magnitude of the first modulated signal to produce a first limited modulated signal; demodulating the first limited modulated signal to recover the constellation points; predistorting the data symbol vectors to provide a minimum magnitude for in-phase and quadrature components thereof to produce predistorted data symbol vectors; modulating the plurality of carriers with the predistorted data symbol vectors to produce a second modulated signal; limiting the magnitude the second modulated signal to produce a second limited modulated signal; and reducing intermodulation products in the second limited modulated signal. Transmitters that perform the method are also included.