SYSTEM AND METHOD FOR NULL FILLING OF IQ WAVEFORM

摘要

Embodiments are provided for null filling of IQ waveform. In an embodiment method, samples below a predetermined threshold are selected from a plurality of samples of an input signal. Amplitude values of a complex null-fill function are calculated to push amplitudes of the samples below the predetermined threshold to a signal level at the predetermined threshold. The phase values of the complex null-fill function are calculated to push the samples of the input signal in an IQ plane in a defined direction from a point closest to a zero signal value. The resulting complex null-fill function is filtered within a predetermined bandwidth of the input signal, and then added to the input signal to provide a modified input signal for amplification. In some embodiments, circuitry, such as an amplifier circuit, may include one or more elements for performing any one or more combinations of steps described in the embodiments.