Predistortion circuit for a transmit system

A system for processing an input signal, the system comprising:

• a predistortion subsystem adapted to receive said input signal and adapted to produce a predistorted signal by applying a deliberate predistortion to said input signal, wherein said predistortion subsystem is adapted to distort said input signal to compensate for distortions in a system output signal;
• and
• a signal processing subsystem adapted to receive and process said predistorted signal and adapted to produce said system output signal, wherein said signal processing subsystem is adapted to decompose said predistorted signal into at least two components, each of said at least two components being processed separately, said signal processing subsystem adapted to combine said at least two components after processing to produce said system output signal, and wherein said signal processing subsystem comprises
• a signal decomposer adapted to decompose said predistorted signal into said at least two components,
• at least two signal component processor blocks, each of said at least two signal component processor blocks including a respective amplifier, each of said signal component processor blocks adapted to receive a respective one of said at least two components from said signal decomposer, and each of said signal component processor blocks adapted to separately process said respective one of said at least two components and to produce a respective processed output, and
• a combiner adapted to receive said respective processed outputs from each of said at least two signal component processor blocks, said combiner producing said system output signal from said respective processed outputs of said at least two signal component processor blocks;
• wherein said predistorted signal is represented as a sequence of magnitude and phase pairs;
• and
• wherein said signal decomposer includes a phasor fragmentation engine to receive said sequence of magnitude and phase pairs, said phasor fragmentation engine adapted to decompose said predistorted signal into said at least two components, each of said at least two components exhibiting a respective magnitude and having a respective varying phase, said respective magnitudes of at least two of said at least two components being substantially equal.