PREDISTORTION WITH SECTIONED BASIS FUNCTIONS
First Claim
1. A predistortion actuator for predistorting a digital input signal, the predistortion actuator comprising:
- a plurality of branches that each implement a respective basis function, wherein for each of at least one of the plurality of branches, the respective basis function is a sectioned basis function having a respective distinct definition for each section of a respective plurality of sections, the respective plurality of sections defining a range of at least one input signal characteristic associated with the digital input signal.
3 Assignments
0 Petitions
Accused Products
Abstract
A predistortion actuator is provided. The predistortion actuator includes a plurality of branches, each of which implements a basis function that acts on a digital input signal. For at least one of the branches, the respective basis function is a sectioned basis function, where each section of the sectioned basis function corresponds to a respective section of a range of at least one input signal characteristic associated with the digital input signal, such as a value range of a magnitude, a temporal characteristic, or a hybrid of the two. A power amplifier system including the predistortion actuator is also provided. Utilizing sectioned basis functions can potentially reduce the hardware resources necessary to realize the predistortion actuator relative to conventional global basis functions. In addition, signal conditioning during coefficient training can potentially be used to reduce the dynamic range of coefficients associated with each sectioned basis function.
-
Citations
20 Claims
-
1. A predistortion actuator for predistorting a digital input signal, the predistortion actuator comprising:
a plurality of branches that each implement a respective basis function, wherein for each of at least one of the plurality of branches, the respective basis function is a sectioned basis function having a respective distinct definition for each section of a respective plurality of sections, the respective plurality of sections defining a range of at least one input signal characteristic associated with the digital input signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification