LOW COMPLEXITY DIGITAL PREDISTORTION FOR CONCURRENT MULTI-BAND TRANSMITTERS
First Claim
1. A concurrent multi-band transmitter, comprising:
- a digital predistortion subsystem comprising a plurality of digital predistorters configured to process a plurality of digital input signals for a plurality of frequency bands of a concurrent multi-band signal to provide a plurality of predistorted digital input signals each being for a different one of the plurality of frequency bands of the concurrent multi-band signal, wherein each digital predistorter of the plurality of digital predistorters is configured to process the plurality of digital input signals based on a set of predistortion coefficients to provide a different one of the plurality of predistorted digital input signals;
circuitry configured to process the plurality of predistorted digital input signals to provide a predistorted concurrent multi-band signal;
power amplifier circuitry configured to amplify the predistorted concurrent multi-band signal to provide the concurrent multi-band signal; and
a single adaptor configured to adaptively configure the set of predistortion coefficients for each of the plurality of digital predistorters based on a digital baseband model of the plurality of digital predistorters that is based on a memory polynomial and has a same set of predistortion coefficients for each of the plurality of digital predistorters.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and methods are disclosed for digital predistortion for a concurrent multi-band transmitter using a single adaptor and a same set of predistortion coefficients for separate digital predistorters for each band. In one embodiment, the single adaptor is configured to adaptively configure a set of predistortion coefficients based on a memory polynomial digital baseband model of the digital predistorters having a same set of predistortion coefficients for each of the digital predistorters. By using the same set of predistortion coefficients for the separate digital predistorters for each band, a complexity of the digital predistortion is substantially reduced.
-
Citations
18 Claims
-
1. A concurrent multi-band transmitter, comprising:
-
a digital predistortion subsystem comprising a plurality of digital predistorters configured to process a plurality of digital input signals for a plurality of frequency bands of a concurrent multi-band signal to provide a plurality of predistorted digital input signals each being for a different one of the plurality of frequency bands of the concurrent multi-band signal, wherein each digital predistorter of the plurality of digital predistorters is configured to process the plurality of digital input signals based on a set of predistortion coefficients to provide a different one of the plurality of predistorted digital input signals; circuitry configured to process the plurality of predistorted digital input signals to provide a predistorted concurrent multi-band signal; power amplifier circuitry configured to amplify the predistorted concurrent multi-band signal to provide the concurrent multi-band signal; and a single adaptor configured to adaptively configure the set of predistortion coefficients for each of the plurality of digital predistorters based on a digital baseband model of the plurality of digital predistorters that is based on a memory polynomial and has a same set of predistortion coefficients for each of the plurality of digital predistorters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method of operation of a concurrent multi-band transmitter, comprising:
-
processing a plurality of digital input signals for a plurality of frequency bands of a concurrent multi-band signal via a plurality of digital predistorters to provide a plurality of predistorted digital input signals each being for a different one of the plurality of frequency bands of the concurrent multi-band signal, wherein each digital predistorter of the plurality of digital predistorters is configured to process the plurality of digital input signals based on a set of predistortion coefficients to provide a different one of the plurality of predistorted digital input signals; processing the plurality of predistorted digital input signals to provide a predistorted concurrent multi-band signal; amplifying the predistorted concurrent multi-band signal to provide the concurrent multi-band signal; and adaptively configuring the set of predistortion coefficients for each of the plurality of digital predistorters via a single adaptor based on a digital baseband model of the plurality of digital predistorters that is based on a memory polynomial and has a same set of predistortion coefficients for each of the plurality of digital predistorters. - View Dependent Claims (15, 16, 17, 18)
-
Specification