Enhanced polyphase digital pre-distortion structure with low complexity in radio transmitter

Abstract

Systems, methods, apparatuses, and computer program products for an enhanced polyphase digital pre-distortion (DPD) structure in a radio transmitter. A method may include creating a combined pre-distorted component by combining each of the pre-distorted polyphase components. Each of the plurality of pre-distorted polyphase components are single phase dependent. Further, the method may include feeding the combined pre-distorted component to an output filter to form a pre-distorted transmission signal. The method may also include generating an output signal by applying the pre-distorted transmission signal to the power amplifier to generate an output signal.

We claim: 
     
         1 . A method comprising:
 creating a combined pre-distorted component by combining each of a plurality of pre-distorted polyphase components, wherein each of the plurality of pre-distorted polyphase components are single phase dependent;   feeding the combined pre-distorted component to an output filter to form a pre-distorted transmission signal; and   generating an output signal by applying the pre-distorted transmission signal to the power amplifier to generate an output signal.   
     
     
         2 . An apparatus comprising:
 at least one processor; and   at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to   create a combined pre-distorted component by combining each of a plurality of pre-distorted polyphase components, wherein each of the plurality of pre-distorted polyphase components are single phase dependent;   feed the combined pre-distorted component to an output filter to form a pre-distorted transmission signal; and   generate an output signal by applying the pre-distorted transmission signal to the power amplifier to generate an output signal.   
     
     
         3 . An apparatus comprising:
 means for creating a combined pre-distorted component by combining each of a plurality of pre-distorted polyphase components, wherein each of the plurality of pre-distorted polyphase components are single phase dependent;   means for feeding the combined pre-distorted component to an output filter to form a pre-distorted transmission signal; and   means for generating an output signal by applying the pre-distorted transmission signal to the power amplifier to generate an output signal.