Wideband intelligent jamming control apparatus and method

• US 9,264,174 B2
• Filed: 05/17/2013
• Issued: 02/16/2016
• Est. Priority Date: 05/22/2012
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Cho, Hui-Rae, Hwang, In-Ho, Kim, Jong-Kyu, Jang, Jin-Gak, Kim, Chun-Soo
• Primary Examiner(s): Dean, Raymond
• Application Number:
  US13/896,467
• Publication Number:
  US 20130316638A1
• Time in Patent Office: 1,005 Days
• Field of Search: 455/1, 342/14
• US Class Current: 1/1
• CPC Class Codes: H04K 3/28 with jamming and anti-jamming mechanisms both included in a same device or system, e.g. wherein anti-jamming includes prevention of undesired self-jamming resulting from jamming
• CPC Class Codes: H04K 3/41 characterized by the control of the jamming activation or deactivation time control of jamming activation and deactivation time only for the purpose of alternating between jamming mode and target monitoring mode H04K3/45
• CPC Class Codes: H04K 3/42 characterized by the control of the jamming frequency or wavelength
• CPC Class Codes: H04K 3/43 characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
• CPC Class Codes: H04K 3/45 characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"
• CPC Class Codes: H04K 3/825 by jamming
• CPC Class Codes: H04K 3/827 using characteristics of target signal or of transmission as countermeasure against jamming H04K3/25, e.g. using direct sequence spread spectrum or fast frequency hopping spread spectrum techniques H04B1/69

Abstract

A wideband intelligent jamming control apparatus and method is provided, which efficiently control an unauthorized threat signal. The wideband intelligent jamming control apparatus includes a signal detection terminal for detecting and analyzing wideband frequency signals in real time, and transmitting a jamming command and jamming signal specification information if a corresponding wideband frequency signal is determined to be an unauthorized threat signal. A jamming terminal receives the jamming command and the jamming signal specification information, and generates and emits a jamming signal based on the jamming command and the jamming signal specification information. The signal detection terminal and the jamming terminal may be configured to be physically separated from each other and may be controlled on a network.

Claims

1. A wideband intelligent jamming control apparatus, comprising:

a signal detection terminal for detecting and analyzing a wideband frequency signal in real time, and transmitting a jamming, command and jamming signal specification information if the wideband frequency signal is determined to be an unauthorized threat signal, the signal detection terminal comprising;

a non-transitory signal storage unit storing a program, a frequency database, and a policy editor comprising a processor in communication with the storage unit, the processor configured with the program to perform whether to transmit or terminate jamming on the unauthorized signals the program being executed by the processor with the following algorithm;

in response to detection of wideband frequency signals,

the processor to determine whether the wideband frequency signals are authorized by using at least one of a center frequency, a bandwidth and power intensity of the threat signal detected in real time, and information required to define specification of the threat signal,

the processor further to determine

whether to start to transmit the jamming command signal and whether to continue and terminate transmitting jamming command signal associated with the jamming command signal starting and ending time, wherein

the starting and ending time is determined according to a period ranging from a time point at which the signal detection terminal transmits a jamming command signal to a time point immediately before the signal detection terminal performs the authorization determination of the wideband frequency signals in a corresponding jamming band, and

to transmit jamming command and jamming signal specification information based on the determinations by the processor; and

a jamming terminal for receiving the jamming command and the jamming signal specification information, and generating and emitting a jamming signal based on the jamming command and the jamming signal specification information,

wherein the signal detection terminal and the jamming terminal are configured to be physically separated from each other and are controlled on a network.

10. The wideband intelligent jamming control apparatus of claim 1, wherein the jamming terminal comprises a jamming signal storage unit, wherein the jamming signal storage unit is configured to store specification information about the jamming signal received from the signal detection terminal.

11. The wideband intelligent jamming control apparatus of claim 10, wherein the jamming signal storage unit is configured to add specification of a jamming signal in compliance with the jamming command received from the signal detection terminal, and to delete specification of a jamming signal, a jamming time of which has elapsed, thus exhibiting current conditions of jamming signals generated in real time.

12. The wideband intelligent jamming control apparatus of claim 1, wherein the jamming terminal is configured to support setting of jamming termination so that jamming emission can be compulsorily stopped before the signal detection terminal performs signal detection in correspondence with a signal detection period of the signal detection terminal.

13. The wideband intelligent jamming control apparatus of claim 1, wherein the jamming terminal is operated regardless of signal detection performed by the signal detection terminal and is capable of emitting a jamming signal for a signal band, not detected by the signal detection terminal, or terminating emission of the jamming signal.

14. The wideband intelligent jamming control apparatus of claim 1, wherein the jamming terminal is operated in a network configured by the signal detection terminal and is configured to receive the jamming command from the signal detection terminal over the network.

15. The wideband intelligent jamming control apparatus of claim 1, wherein the signal detection terminal is configured independently perform a signal detection and analysis operation without aid of the jamming terminal, and wherein the jamming terminal having previously received a jamming command from the signal detection terminal is being independently operated without aid of the signal detection terminal.

16. The wideband intelligent jamming control apparatus of claim 15, wherein if the jamming terminal being independently operated accesses the network configured by the signal detection terminal, the jamming terminal is subscribed to the network and is operated in conjunction with the signal detection terminal.

2. The wideband intelligent jamming control apparatus of claim wherein the

signal storage unit is configured to store pieces of specification information about the detected signals;

the frequency database (DS) is configured to store pieces of frequency band information about authorized signals, use of which is permitted, the authorized frequency DB being a basis for distinguishing unauthorized signals, use of which is not permitted, from the authorized signals; and

the policy editor is configured selectively to control whether to perform jamming on the unauthorized signals.

3. The wideband intelligent jamming control apparatus of claim 2, wherein the frequency DB is configured to store pieces of signal frequency information classified depending on region.

4. The wideband intelligent jamming control apparatus of claim 2, wherein the signal storage unit is configured to automatically delete specification information about the authorized signals from the pieces of specification information about the detected signals stored in the detected signal storage unit.

5. The wideband intelligent jamming control apparatus of claim 2, wherein the policy editor is configured to store specification information about a signal determined to be a threat signal among the unauthorized signals, to store specification information about a jamming signal corresponding to the threat signal, to store information about a minimum emission time of the jamming signal, and to store or to edit policies related to whether to perform jamming.

6. The wideband intelligent jamming control apparatus of claim 5, wherein the policy editor performs setting such that,

if the signal detection terminal detects a signal on a specific transmission channel, a jamming signal for a reception channel is emitted, whereas

if the signal detection terminal detects a signal on a specific reception channel, a jamming signal for a transmission channel is emitted.

7. The wideband intelligent jamming control apparatus of claim 5, wherein the specification information about the jamming signal includes at least one of a center frequency, a bandwidth, relative power intensity, jamming time information, and information about whether to continue jamming, of the jamming signal to be generated by the jamming terminal, and includes information required to define specification of the jamming signal.

8. The wideband intelligent jamming control apparatus of claim 7, wherein the relative power intensity of the specification information about the jamming signal is relative power intensity into which a signal gain based on Jammer to Signal Ratio (JSR) is incorporated.

9. The wideband intelligent jamming control apparatus of claim 7, wherein the jamming time information is configured to set emission time of the jamming signal emitted by the jamming terminal so that the jamming signal does not influence the signal detection terminal in correspondence with a signal detection period of the signal detection terminal.

17. A computer-implemented wideband intelligent jamming control method comprising:

detecting wideband frequency signals in real time;

storing pieces of specification information about the detected signals in a detected signal storage unit;

determining whether the detected signals have been authorized, based on an authorized frequency database (DB);

determining whether to transmit or terminate jamming on unauthorized signals, use of which is not permitted, based on a policy editor based on following steps;

in response to detection of wideband frequency signals,

determining whether the wideband frequency signals are authorized by using at least one of a center frequency, a bandwidth and power intensity of the threat signal detected in real time, and information required to define specification of the threat signal,

determining whether to start to transmit a jamming command signal, and

determining whether to continue and terminate transmitting the jamming command signal associated with the jamming command signal starting and ending time, wherein

the starting and ending time is determined according to during a period ranging from a time point at which a jamming command signal is transmitted to a time point immediately before performing the authorization determination of the wideband frequency signals in a corresponding jamming band;

transmitting a jamming command and jamming signal specification information to a jamming terminal based on the determinations;

storing, the received jamming command and jamming signal specification information in a jamming signal storage unit; and

controlling generation and emission of a jamming signal based on the jamming command and the jamming signal specification information.

18. The wideband intelligent jamming control method of claim 17, wherein controlling the generation and emission of the jamming signal includes set jamming termination so that jamming emission can be stopped before the determination is performed.

19. The wideband intelligent jamming control method of claim 17, wherein controlling the generation and emission of the jamming signal is performed regardless of signal detection at the determinations, thus transmitting a jamming command signal for a signal band, which is not detected at the authorization determination step, or terminating the jamming command signal.