IP Library Granted Patent US 9,124,342
Granted Patent B2
US 9,124,342 · App. 14/288,238 · Granted Sep 1, 2015

Method for the control of a wireless communications link for mitigating adjacent satellite interference

Inventors: Michael Beeler (Jefferson, MD); Jeffery Harig (Mesa, AZ); Wallace Davis (Scottsdale, AZ); Frederick Morris (Gaithersburg, MD); Cris Mamaril (Mesa, AZ)
Assignee: Comtech EF Data Corp.
H04B7/18513H04B7/18515H04B7/18528H04B7/18543
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Quick Facts
Patent No.
US 9,124,342
App. No.
14/288,238
Granted
Sep 1, 2015
Kind
B2
Abstract

A method for remotely and dynamically controlling adjacent satellite interference comprising monitoring one or more off-axis signals emitted by one or more remote transmitters; determining whether one or more of the off-axis signals is creating adjacent satellite interference (ASI), off axis emissions and inband interference that is higher than a predetermined level of acceptable interference, and transmitting a control signal to at least one of the one or more remote transmitters in response to the determination that the one or more off-axis signals is creating interference that is higher than the predetermined level of acceptable interference, the control signal initiating an adjustment to one or more transmission parameters of the one or more remote transmitters such that interference resulting from the one or more off-axis signals emitted by the one or more remote transmitters is reduced or eliminated.

Claims (19)

1. A method for dynamically controlling transmission parameters for reducing inband interference, the method comprising:

monitoring one or more signals emitted by one or more remote transmitters;

determining whether inband interference exists from at least one of the one or more remote transmitters that is higher than a predetermined level of inband interference; and

automatically transmitting a control signal to the remote transmitter in response to a determination that the inband interference is higher than the predetermined level of inband interference, the control signal adjusting one or more transmission parameters of the one or more remote transmitters such that the inband interference is reduced; and

wherein at least one of the one or more transmission parameters that is adjusted comprises at least one of a modulation index, a forward error correction rate, and a spread factor.

2. The method of claim 1 , wherein the one or more remote transmitters are all located within a common network and are configured to communicate among the one or more remote transmitters.

3. The method of claim 1 , wherein the one or more signals monitored are off-axis signals and the monitoring occurs on one or more satellites adjacent to a predetermined satellite to which the one or more signals is to be transmitted.

4. The method of claim 1 , wherein at least one of the one or more transmission parameters is a power spectral density of the one or more signals transmitted by the one or more remote transmitters.

5. The method of claim 1 , wherein at least one of the one or more transmission parameters is a signal bandwidth.

6. The method of claim 1 , wherein at least one of the one or more transmission parameters is a center frequency.

7. A system for dynamically controlling transmission parameters for reducing inband interference, the system comprising:

a monitoring device configured to monitor one or more signals emitted by a remote transmitter and determine whether inband interference exists that is higher than a predetermined level of inband interference; and

a transmitter configured to transmit a control signal to the remote transmitter in response to a determination that the inband interference is higher than the predetermined level of inband interference, the control signal configured to adjust one or more transmission parameters such that the inband interference is reduced; and

wherein at least one of the transmission parameters that is adjusted comprises at least one of a modulation index, a forward error correction rate, and a spread factor.

8. The system of claim 7 , wherein the one or more remote transmitters are all located within a common network and are configured to communicate among the one or more remote transmitters.

9. The system of claim 7 , wherein the monitoring device is located on one or more satellites adjacent to a predetermined satellite to which the one or more signals is to be transmitted and further configured to monitor one or more off-axis signals.

10. The system of claim 7 , wherein at least one of the one or more transmission parameters is a power spectral density of the one or more signals transmitted by the remote transmitter.

11. The system of claim 7 , wherein at least one of the one or more transmission parameters is a signal bandwidth.

12. The system of claim 7 , wherein at least one of the one or more transmission parameters is a center frequency.

Assignments (4)
RELEASE OF SECURITY INTEREST IN PATENTS AT REEL 037993/FRAME 0001 Recorded Jun 19, 2024
From: CITIBANK, N.A., AS ADMINISTRATIVE AGENT
To: COMTECH TELECOMMUNICATIONS CORP.; COMTECH EF DATA CORP.; COMTECH MOBILE DATACOM LLC; COMTECH SATELLITE NETWORK TECHNOLOGIES, INC.; COMTECH SYSTEMS, INC.; COMTECH XICOM TECHNOLOGY, INC.; MAPLE ACQUISITION LLC; TELECOMMUNICATION SYSTEMS, INC.
Reel/Frame 067780/0566 →
SECURITY INTEREST Recorded Jun 18, 2024
From: COMTECH SATELLITE NETWORK TECHNOLOGIES, INC.
To: TCW ASSET MANAGEMENT COMPANY LLC, AS AGENT
Reel/Frame 067756/0148 →
MERGER AND CHANGE OF NAME Recorded Apr 23, 2024
From: COMTECH EF DATA CORP.; COMTECH XICOM TECHNOLOGY, INC.; COMTECH SATELLITE NETWORK TECHNOLOGIES, INC.
To: COMTECH SATELLITE NETWORK TECHNOLOGIES, INC.
Reel/Frame 067187/0384 →
SECURITY AGREEMENT Recorded Mar 3, 2016
From: COMTECH EF DATA CORP.; COMTECH XICOM TECHNOLOGY, INC.; COMTECH MOBILE DATACOM CORPORATION; TELECOMMUNICATION SYSTEMS, INC.
To: CITIBANK N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 037993/0001 →
Continuity (3)
Division 13162483 · Jun 16, 2011
Provisional Application 61451196 · Mar 10, 2011
Related Publication 20140273812A1 · Sep 18, 2014