A novel apparatus and method for a hybrid Cartesian/polar digital QAM modulator. The hybrid technique of the present invention utilizes a combination of an all digital phase locked loop (ADPLL) that features a wideband frequency modulation capability and a digitally controlled power amplifier (DPA) that features interpolation between 90 degree spaced quadrature phases. This structure is capable of performing either a polar operation or a Cartesian operation and can dynamically switch between them depending on the instantaneous value of a metric measured by a thresholder/router. In this manner, the disadvantages of each modulation technique are avoided while the benefits of each are exploited.

 
Web www.patentalert.com

< Weighted open loop power control transmitter cross reference to related applications

> Method for testing an appliance comprising an audio port, and a respective appliance

> System and method for locating and accessing a blood vessel

~ 00518