Systems and methods for a predistortion linearizer with frequency compensation

• US 9,793,932 B2
• Filed: 03/16/2016
• Issued: 10/17/2017
• Est. Priority Date: 03/16/2015
• Status: Active Grant

• Current Assignee: Mission Microwave Technologies Inc.
• Original Assignee: Mission Microwave Technologies Inc.
• Inventors: Deckman, Blythe C, DeLisio, Jr., Michael P
• Primary Examiner(s): Guarino, Rahel
• Application Number:
  US15/072,313
• Publication Number:
  US 20160277047A1
• Time in Patent Office: 580 Days
• Field of Search: 375297, 375296, 330132, 330278, 330284, 4551143, 455126, 455 69
• CPC Class Codes: H03F 1/3241 using predistortion circuits H03F1/3211, H03F1/3217 take precedence
• CPC Class Codes: H04B 1/0475 with means for limiting noise, interference or distortion H04B1/0483 takes precedence
• CPC Class Codes: H04B 2001/0425 with linearisation using predistortion

Abstract

An analog predistortion linearizer system with dynamic frequency compensation for automatically adjusting predistortion characteristics based on a detected frequency includes a frequency detector configured to generate at least one frequency detection signal in response to receiving an amplifier drive signal, the frequency detection signal including a frequency indicator that indicates the frequency of the amplifier drive signal. Moreover, the system also includes a controller communicatively coupled to the frequency detector and configured to generate a predistorter control signal in response to receiving the frequency detection signal from the frequency detector, and a predistorter communicatively coupled to i) the frequency detector and ii) the controller, the predistorter configured to generate a predistorted amplifier drive signal based on at least the predistorter control signal.

Claims

1. An analog predistortion linearizer system with dynamic frequency compensation for automatically adjusting predistortion characteristics based on a detected frequency, the system comprising:

a frequency detector generating at least one frequency detection signal in response to receiving an amplifier drive signal, the at least one frequency detection signal including a frequency indicator that indicates a frequency of the amplifier drive signal, said at least one frequency detection signal comprising an analog signal or a digital signal;

a controller communicatively coupled to the frequency detector and generating at least one predistorter control signal in response to receiving the at least one frequency detection signal from the frequency detector; and

an analog predistorter communicatively coupled to i) the frequency detector and ii) the controller, the analog predistorter generating a predistorted amplifier drive signal based on the at least one predistorter control signal, wherein said controller comprising a circuit for processing the received analog signal and for generating a proper predistortion signal for the analog predistorter.

2. The analog predistortion linearizer system of claim 1, wherein the predistorted amplifier drive signal comprises gain amplitude and phase distortion characteristics to counteract gain amplitude and phase distortion property of an amplifier.

3. The analog predistortion linearizer system of claim 1, wherein the frequency detector communicates the amplifier driver signal with the predistorter while substantially maintaining characteristics of the signal.

4. A processor-executable method for automatically adjusting predistortion characteristics of a radio frequency signal comprising:

receiving, via a frequency detector, the radio frequency signal;

detecting, via the frequency detector, a frequency value in response to the receiving;

generating, via the frequency detector, at least one frequency detection signal in response to detecting, said at least one frequency detection signal comprising an analog signal or a digital signal;

generating, via a controller, a predistortion control signal in response to the detected frequency value; and

generating, via an analog predistorter, a predistorted amplifier drive signal to the radio frequency signal such that the generated predistorted amplifier drive signal counteracts a gain amplitude and phase distortion of an amplifier when processing the radio frequency signal, wherein said controller comprises a circuit for processing the received analog signal and for generating a proper predistortion signal for the analog predistorter.

5. The processor-executable method of claim 4, wherein the predistorted amplifier drive signal comprises gain amplitude and phase distortion characteristics to counteract the gain amplitude and phase distortion properties of the amplifier.

6. The processor-executable method of claim 4, further comprising communicating, via the frequency detector, the predistorted amplifier driver signal with the analog predistorter while substantially maintaining characteristics of the radio frequency signal.

7. The processor-executable method of claim 4, wherein detecting comprises detecting the frequency value.

8. The processor-executable method of claim 4, wherein detecting comprises detecting the frequency value.

9. An analog predistortion linearizer apparatus with dynamic frequency compensation for automatically adjusting predistortion characteristics based on a detected frequency, the apparatus comprising:

an analog predistorter for receiving a drive signal;

a frequency detector communicatively coupled to the analog predistorter, wherein the analog predistorter communicates the received drive signal with the frequency detector;

wherein the frequency detector generates a frequency detection signal in response to the received drive signal, the frequency detection signal including a frequency indicator that indicates a frequency of the drive signal, said at least one frequency detection signal comprising an analog signal or a digital signal;

a controller communicatively coupled to the frequency detector and the analog predistorter, said controller generating a predistorter control signal in response to receiving the at least one frequency detection signal from the frequency detector; and

wherein the analog predistorter generates a predistorted drive signal based on the predistorter control signal, and wherein said controller processes the received analog signal and for generating a proper predistortion signal for the analog predistorter.

10. The analog predistortion linearizer apparatus of claim 9, wherein the predistorted drive signal comprises gain amplitude and phase distortion characteristics to counteract gain amplitude and phase distortion property of an amplifier.

11. The analog predistortion linearizer apparatus of claim 9, wherein the frequency detector directs the driver signal while substantially maintaining characteristics of the drive signal.

12. The analog predistortion linearizer apparatus of claim 9, wherein the controller comprises a processor and a memory, wherein the controller processes the digital signal.

13. The analog predistortion linearizer apparatus of claim 12, wherein the controller digitizes the frequency detection signal and to store data associated with the frequency detection signal in a programmable lookup table to determine the predistorter control signal.