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US 2009/0021320 A1Published application
Cartesian modulation system via multi-level pulse width modulation
AssigneeNXP B.V.
InventorsGerben W. De Jong, Jan Vromans
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AssigneeNXP B.V.
InventorsGerben W. De Jong, Jan Vromans
Estimating the term…
A system and method for Cartesian modulation achieved via generation of a three-level pulse width modulated signal. The system in overview comprises two binary pulse width modulated signal generators receiving signals related to the in-phase and quadrature components of a base-band signal and a combination and amplification stage that combines the signals provided by the two binary pulse width modulated signal generators. The binary pulse width modulated signal generators contain at least one signal comparator and at least one base-band pre-distortion element. The signals related to the in-phase and quadrature components of the base-band signal may be; the positive or negative parts of the in-phase component, the positive or negative parts of the quadrature component, the absolute value or sign of the in-phase component, or the absolute value or sign of the quadrature component. These signals may be distorted by a base-band pre-distortion element before being coupled to the comparators.
A Cartesian modulation system for producing an RF output signal, containing an RF carrier and modulated by a base-band signal, the system comprising:
A method for generating an RF output signal modulated by a base-band signal, comprising the steps of:
Dependencies are inferred from the claim text.