Process of reducing the peak to average energy ratio in a radio frequency signal, and, radio frequency transmitter providing a reduced peak to average energy ratio in a radio frequency signal

摘要

"PROCESS OF REDUCING THE PEAK ENERGY RATIO TO AVERAGE ON A RADIO FREQUENCY SIGN, AND, RADIO FREQUENCY TRANSMITTER PROVIDING A REDUCED PEAK ENERGY RATIO TO AVERAGE RADIO FREQUENCY SIGNAL". The invention provides a method of reducing the peak energy to average energy ratio in a radio frequency signal. The process comprises the steps of modulating a plurality of subcarriers with a plurality of data symbol vectors to produce a first modulated signal; limiting the magnitude of the first modulated signal to produce a limited first modulated signal; demodulation of the first limited modulated signal to recover the constellation points; pre-distortion of the data symbol vectors to provide a minimum magnitude for the phase and quadrature components to produce pre-distorted data symbol vectors; modulating the plurality of carriers with the pre-distorted data symbol vectors to produce a second modulated signal; limiting the magnitude of the second modulated signal to produce a second limited modulated signal; and reducing the intermodulation products in the second limited modulated signal. Transmitters carrying out the process are also included.