Patent ID: 10742180

Abstract:
An analog input signal (X(n)) is processed by a Peak to Average Ratio Reduction (PARR) block to diminish the difference between peak amplitudes and average amplitudes of the analog input signal (X(n)). After, a distorted signal (h(n)) having low peak to average amplitude ratio, generated at the PARR block output, is processed by a delta sigma modulation (DSM) block converts the distorted signal (h(n)) into a digitally modulated distorted signal (h_dsm(n)) with high signal to noise ratio (SNR). Afterwards, the digitally modulated distorted signal (h_dsm(n)) is corrected and amplified by a Class-D RF power amplifier fed by a feeding signal (env(n)) generated from a digital correction signal (z_dsm(n)). As a result, a digitally modulated signal (y(n)) with high signal to noise ratio (SNR) of the analog input signal (X(n)) is generated at the output of the Class-D RF power amplifier.