Transmitter with reduced power consumption and increased linearity

A method comprising:

• generating a signal having an amplitude component and a phase component;
• modulating the phase component of the generated signal using pulse position modulation;
• modulating the amplitude component of the generated signal onto the phase modulated signal using pulse width modulation;
• amplifying the amplitude and phase modulated signal;
• generating an error signal in a feedback loop path;
• and
• modulating the error signal onto the amplitude and phase modulated signal using pulse width modulation.

A non-transitory computer readable medium having a computer program stored thereon, the computer program comprising instructions operable to cause a processor to perform the method steps of:

• generating a signal having an amplitude component and a phase component;
• modulating the phase component of the generated signal using pulse position modulation;
• modulating the amplitude component of the generated signal onto the phase modulated signal using pulse width modulation;
• amplifying the amplitude and phase modulated signal;
• generating an error signal in a feedback loop path;
• and
• modulating the error signal onto the amplitude and phase modulated signal.

A transmitter comprising an apparatus comprising:

• a signal generator configured to generate a signal having an amplitude component and a phase component;
• a first pulse position modulating unit configured to modulate the phase component of the generated signal;
• a first pulse width modulating unit configured to modulate the amplitude component of the generated signal onto the phase modulated signal;
• an amplifier unit configured to amplify the amplitude and phase modulated signal;
• a feedback loop path configured to correct the amplitude and phase modulated signal using an error signal;
• and
• a second pulse width modulating unit configured to modulate the error signal onto the amplitude and phase modulated signal.