IP Library Granted Patent US 9,130,624
Granted Patent B2
US 9,130,624 · App. 13/843,393 · Granted Sep 8, 2015

Envelope feedback interference reduction and data throughput maximization

Inventors: Stuart Daughtridge (Huntingtown, MD); Robert Potter (Los Altos, CA)
Assignee: Kratos Integral Holdings, LLC
H04B1/0475H04B1/1036H04B1/123H04L27/0012
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Quick Facts
Patent No.
US 9,130,624
App. No.
13/843,393
Granted
Sep 8, 2015
Kind
B2
Abstract

Reducing interference on an input signal which includes a desired signal and an interfering signal, including: processing the input signal in frequency and time domain to separate the desired signal from the interfering signal by: characterizing the interfering signal without a priori knowledge of characteristics of the interfering signal; generating a clean copy of a carrier of the input signal using the characterized interfering signal; inverting the clean copy of the carrier and correcting for gain and phase; and summing the inverted clean copy of the carrier with the input signal to generate an output signal which is substantially close to the desired signal, wherein the generated output signal has adequate signal-to-noise ratio (SNR) so that it can be processed.

Claims (38)

1. A method of reducing interference from an interfering signal that overlaps with a desired signal, the method comprising:

receiving an input signal comprising the desired signal and the interfering signal;

multiplying the input signal by itself n-number of times to determine a carrier frequency, a symbol rate estimate, and a modulation estimate of the interfering signal, wherein n is an integer;

generating a copy of the interfering signal based on the carrier frequency, the symbol rate estimate, and the modulation estimate;

inverting the copy of the interfering signal;

summing the inverted copy of the interfering signal with the input signal to generate an output signal similar to the input signal having a reduced interfering signal strength.

2. The method of claim 1 further comprising,

the multiplying of the input signal by itself n-number of times to achieve a continuous-wave (CW) signal, wherein n equals a current power index.

3. The method of claim 2 , wherein the current power index indicates the modulation estimate and the symbol rate estimate.

4. The method of claim 3 , further comprising

resampling the input signal at a multiple of the symbol rate to determine a modulation type, a symbol rate and a symbol trajectory.

5. The method of claim 1 further comprising repeating the multiplying of the input signal by itself n-number of times, the generating of the interfering signal, the inverting of the copy of the interfering signal, the correcting of the gain and phase, and the summing of the inverted copy of the interfering signal with the input signal a desired number of times to create a feedback loop to further reduce interference from a second interfering signal.

6. The method of claim 1 , further comprising correcting the copy of the interfering signal for gain and phase.

7. A signal characterization and separation system to process an input signal, the input signal comprising an interfering signal that overlaps with a desired signal, the system comprising:

a receiver configured to receive the input signal;

at least one processor operably coupled to the receiver and configured to multiply the input signal by itself n-number of times to determine a carrier frequency, a symbol rate estimate, and a modulation estimate of the interfering signal, wherein n is an integer; and

a signal separation unit operably coupled to the at least one processor and configured to

generate a copy of the interfering signal based on the carrier frequency, the symbol rate estimate, and the modulation estimate,

invert the copy of the interfering signal, and

sum the inverted copy of the interfering signal with the input signal to generate an output signal having a reduced interfering signal strength, the output signal being similar to the desired signal.

8. The system of claim 7 , wherein the at least one processor is further configured to multiply the input signal by itself n-number of times to achieve a continuous-wave (CW) signal, wherein n equals a current power index.

9. The system of claim 8 , wherein the current power index indicates the modulation estimate and the symbol rate estimate.

10. The system of claim 9 , further comprising

a re-sampling unit configured to reprocess the input signal to determine a modulation type, a symbol rate and a symbol trajectory.

11. The system of claim 10 , further comprising an adaptive regenerative unit configured to generate the copy of the interfering signal using the symbol trajectory.

12. The apparatus of claim 7 , further comprising a feedback module configured to deliver the output signal to the receiver a number of times.

13. The apparatus of claim 7 , wherein the signal separation unit is further configured to correct the copy of the interfering signal for gain and phase.

14. A non-transitory computer-readable storage medium storing a computer program for reducing interference from an interfering signal that overlaps with a desired signal, the computer program comprising executable instructions that cause a computer to:

receive an input signal comprising the desired signal and the interfering signal;

multiplying the input signal by itself n-number of times to determine a carrier frequency, a symbol rate estimate, and a modulation estimate of the interfering signal;

generate a copy of the interfering signal based on the carrier frequency, the symbol rate estimate, and the modulation estimate;

invert the copy of the interfering signal; and

sum the inverted copy of the interfering signal with the input signal to generate an output signal which is substantially close to the desired signal, the generated output signal having a reduced interfering signal strength.

15. The non-transitory computer-readable storage medium of claim 14 , wherein measuring the input signal raised to an incremental power comprising executable instructions that cause the computer to

multiply the input signal by itself n-number of times until a continuous-wave (CW) signal is achieved,

wherein the n-number of times is a carrier power index.

16. The non-transitory computer-readable storage medium of claim 15 , wherein the current power index indicates the modulation estimate and the symbol rate estimate.

17. The non-transitory computer readable medium of claim 14 , wherein the computer program comprising executable instructions that further causes the computer to correct the copy of the interfering signal for gain and phase.

Assignments (10)
SECURITY INTEREST Recorded Mar 17, 2026
From: FLORIDA TURBINE TECHNOLOGIES INC.; KRATOS ANTENNA SOLUTIONS CORPORATION; KRATOS INTEGRAL HOLDINGS, LLC; KRATOS SRE, INC.; KRATOS TECHNOLOGY & TRAINING SOLUTIONS, INC.; KRATOS UNMANNED AERIAL SYSTEMS, INC.; MICRO SYSTEMS, INC.
To: PNC BANK, NATIONAL ASSOCIATION
Reel/Frame 075103/0203 →
RELEASE OF PATENT SECURITY INTEREST RECORDED AT R/F 59664/0917 Recorded Mar 4, 2026
From: TRUIST BANK
To: FLORIDA TURBINE TECHNOLOGIES, INC.; GICHNER SYSTEMS GROUP, INC.; KRATOS ANTENNA SOLUTIONS CORPORATION; KRATOS INTEGRAL HOLDINGS, LLC; KRATOS TECHNOLOGY & TRAINING SOLUTIONS, INC.; KRATOS UNMANNED AERIAL SYSTEMS, INC.; MICRO SYSTEMS, INC.
Reel/Frame 075029/0769 →
RELEASE OF SECURITY INTEREST Recorded Apr 6, 2022
From: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
To: CHARLESTON MARINE CONTAINERS, INC.; DIGITAL FUSION, INC.; KRATOS INTEGRAL HOLDINGS, LLC; KRATOS TECHNOLOGY & TRAINING SOLUTIONS, INC.; KRATOS UNMANNED AERIAL SYSTEMS, INC. (F/K/A COMPOSITE ENGINEERING INC.); SAT CORPORATION
Reel/Frame 059616/0001 →
RELEASE OF SECURITY INTEREST Recorded Apr 6, 2022
From: TRUIST BANK, SUCCESSOR BY MERGER TO SUNTRUST BANK, AS COLLATERAL AGENT AND ADMINISTRATIVE AGENT
To: KRATOS INTEGRAL HOLDINGS, LLC; SAT CORPORATION; KRATOS TECHNOLOGY & TRAINING SOLUTIONS, INC.; CHARLESTON MARINE CONTAINERS, INC.; DIGITAL FUSION, INC.; KRATOS UNMANNED AERIAL SYSTEMS, INC. (F/K/A COMPOSITE ENGINEERING, INC.); GICHNER SYTEMS GROUP, INC.; MICRO SYSTEMS, INC.; SECUREINFO CORPORATION
Reel/Frame 059616/0151 →
SECURITY INTEREST Recorded Apr 6, 2022
From: FLORIDA TURBINE TECHNOLOGIES, INC.; GICHNER SYSTEMS GROUP, INC.; KRATOS ANTENNA SOLUTIONS CORPORATON; KRATOS INTEGRAL HOLDINGS, LLC; KRATOS TECHNOLOGY & TRAINING SOLUTIONS, INC.; KRATOS UNMANNED AERIAL SYSTEMS, INC.; MICRO SYSTEMS, INC.
To: TRUIST BANK, AS ADMINISTRATIVE AGENT
Reel/Frame 059664/0917 →
AMENDED AND RESTATED INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Dec 7, 2017
From: KRATOS DEFENSE & SECURITY SOLUTIONS, INC.; AI METRIX, INC.; AIRORLITE COMMUNICATIONS, INC.; AVTEC SYSTEMS, INC.; BSC PARTNERS, LLC; CARLSBAD ISI, INC.; CHARLESTON MARINE CONTAINERS INC.; DALLASTOWN REALTY I, LLC; DALLASTOWN REALTY II, LLC; DEFENSE SYSTEMS, INCORPORATED; DEI SERVICES CORPORATION; DFI REALTY, LLC; DIGITAL FUSION SOLUTIONS, INC.; DIGITAL FUSION, INC.; DIVERSIFIED SECURITY SOLUTIONS, INC.; DTI ASSOCIATES, INC.; GENERAL MICROWAVE CORPORATION; GENERAL MICROWAVE ISRAEL CORPORATION; GICHNER SYSTEMS GROUP, INC.; GICHNER SYSTEMS INTRERNATIONAL, INC.; HAVERSTICK CONSULTING, INC.; HAVERSTICK GOVERNMENT SOLUTIONS, INC.; HENRY BROS. ELECTRONICS, INC.; HENRY BROS. ELECTRONICS INC.; HENRY BROS. ELECTRONICS, L.L.C.; HGS HOLDINGS, INC.; JMA ASSOCIATES, INC.; KPSS GOVERNMENT SOLUTIONS, INC; KRATOS COMMUNICATIONS, INC.; KRATOS DEFENSE & ROCKET SUPPORT SERVICES, INC.; KRATOS INTEGRAL HOLDINGS, LLC; KRATOS INTEGRAL SYSTEMS INTERNATIONAL, INC.; KRATOS PUBLIC SAFETY & SECURITY SOLUTIONS, INC.; KRATOS SOUTHEAST, INC.; KRATOS SPACE & MISSILE DEFENSE SYSTEMS, INC.; KRATOS SYSTEMS AND SOLUTIONS, INC.; KRATOS TECHNOLOGY & TRAINING SOLUTIONS, INC.; KRATOS TEXAS, INC.; KRATOS UNMANNED AERIAL SYSTEMS, INC.; KRATOS UNMANNED SYSTEMS SOLUTIONS, INC.; LVDM, INC.; MADISON RESEARCH CORPORATION; MICRO SYSTEMS, INC.; MSI ACQUISITION CORP.; POLEXIS, INC.; REAL TIME LOGIC, INC.; REALITY BASED IT SERVICES LTD.; ROCKET SUPPORT SERVICES, LLC; SAT CORPORATION; SCT ACQUISITION, LLC; SCT REAL ESTATE, LLC; SECUREINFO CORPORATION; SHADOW I, INC.; SHADOW II, INC.; SUMMIT RESEARCH CORPORATION; WFI NMC CORP.; KRATOS SOUTHWEST L.P.
To: SUNTRUST BANK
Reel/Frame 044742/0845 →
SECURITY INTEREST Recorded Dec 1, 2017
From: AIRORLITE COMMUNICATIONS, INC.; CHARLESTON MARINE CONTAINERS, INC.; DIGITAL FUSION, INC.; HENRY BROS. ELECTRONICS, INC. (DE); HENRY BROS. ELECTRONICS, INC. (NJ); KRATOS INTEGRAL HOLDINGS, LLC; KRATOS TECHNOLOGY & TRAINING SOLUTIONS, INC.; KRATOS UNMANNED AERIAL SYSTEMS, INC.; GICHNER SYSTEMS GROUP, INC.; MICRO SYSTEMS, INC.; SAT CORPORATION; SECUREINFO CORPORATION
To: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 044593/0678 →
RELEASE OF SECURITY INTEREST Recorded Nov 21, 2017
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: AIRORLITE COMMUNICATIONS, INC.; CHARLESTON MARINE CONTAINERS INC.; KRATOS UNMANNED AERIAL SYSTEMS, INC.; DIGITAL FUSION, INC.; GENERAL MICROWAVE CORPORATION; HENRY BROS. ELECTRONICS, INC.; KRATOS INTEGRAL HOLDINGS, LLC; KRATOS TECHNOLOGY & TRAINING SOLUTIONS, INC.; KRATOS DEFENSE & SECURITY SOLUTIONS, INC.; SECUREINFO CORPORATION
Reel/Frame 044195/0924 →
SECURITY INTEREST Recorded Jan 30, 2015
From: AIRORLITE COMMUNICATIONS, INC.; CHARLESTON MARINE CONTAINERS INC.; COMPOSITE ENGINEERING, INC.; DIGITAL FUSION, INC.; GENERAL MICROWAVE CORPORATION; HENRY BROS. ELECTRONICS, INC.; KRATOS INTEGRAL HOLDINGS, LLC; KRATOS TECHNOLOGY & TRAINING SOLUTIONS, INC.; KRATOS DEFENSE & SECURITY SOLUTIONS, INC.; SECUREINFO CORPORATION
To: WILMINGTON TRUST, NATIONAL ASSOCIATION
Reel/Frame 034861/0796 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 15, 2013
From: DAUGHTRIDGE, STUART; POTTER, ROBERT
To: KRATOS INTEGRAL HOLDINGS, LLC
Reel/Frame 030023/0245 →
Continuity (2)
Provisional Application 61704313 · Sep 21, 2012
Related Publication 20140086359A1 · Mar 27, 2014