Power series type predistorter for multi-frequency bands operation
First Claim
1. A power series type predistorter for multi-frequency bands, comprising:
- a linear transmission path consisting of a delay element for delaying input signals;
N distortion generating paths, N being an integer equal to or greater than 2;
dividing means for dividing the input signals to said linear transmission path and said N distortion generating paths;
N variable band signal extractors each inserted in corresponding one of said N distortion generating paths, for extracting signals in N different frequency bands from said input signals;
N distortion generators each inserted in corresponding one of said N distortion generating paths, for generating distortion components of a predetermined odd order of said signals in said N frequency bands;
combining means for combining an output from said linear transmission path and outputs from said N distortion generating paths and outputting a result of combining from the predistorter; and
a frequency band controller for controlling frequency bands of said N variable band signal extractors.
1 Assignment
0 Petitions
Accused Products
Abstract
A power series type predistorter for multi-frequency bands includes a linear transmission path PL provided with a delay element 5 and distortion generating paths PD1 and PD2 for a plurality of frequency bands in parallel; wherein each of the distortion generating paths PD1 and PD2 for a plurality of frequency bands includes variable band signal extractors 111 and 112 for extracting a signal in each frequency band from input signals and distortion generators 131a and 132a which is provided with the extracted signals and which generates at least one of the odd number distortion components of the signals and making it as an output from the distortion generating paths PD1 and PD2 for frequency bands; and wherein the frequency band controller 6 controls frequency bands of the variable band signal extractors 111 and 112.
65 Citations
11 Claims
-
1. A power series type predistorter for multi-frequency bands, comprising:
-
a linear transmission path consisting of a delay element for delaying input signals;
N distortion generating paths, N being an integer equal to or greater than 2;
dividing means for dividing the input signals to said linear transmission path and said N distortion generating paths;
N variable band signal extractors each inserted in corresponding one of said N distortion generating paths, for extracting signals in N different frequency bands from said input signals;
N distortion generators each inserted in corresponding one of said N distortion generating paths, for generating distortion components of a predetermined odd order of said signals in said N frequency bands;
combining means for combining an output from said linear transmission path and outputs from said N distortion generating paths and outputting a result of combining from the predistorter; and
a frequency band controller for controlling frequency bands of said N variable band signal extractors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification