Optimized Utilization of Electronic Counter Measures

• US 20060267827A1
• Filed: 01/19/2006
• Published: 11/30/2006
• Est. Priority Date: 01/20/2005
• Status: Active Grant

• Current Assignee: Saab AB
• Original Assignee: Saab AB
• Inventors: Ferm, Niklas, Lindvall, Thomas
• Granted Patent: US 7,339,515 B2
• Time in Patent Office: Days
• US Class Current: 342/14
• CPC Class Codes: G01S 7/38 Jamming means, e.g. producing false echoes
• CPC Class Codes: H04K 2203/34 involving multiple cooperating jammers
• CPC Class Codes: H04K 2203/36 including means for exchanging jamming data between transmitter and receiver, e.g. in forward or backward direction
• 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"

Abstract

The invention relates to a distributed electronic counter measures solution, wherein jamming signals (J_A; J_B) may be emitted towards threats (X1, X2) from counter measures stations in multiple vehicles (A, B), which are physically separated from one another in order to improve the chances of survival the vehicles (A, B) as well as any other vehicles that are associated with these vehicles (A, B) in a group of vehicles. The vehicles in the group exchange messages (D) over a wireless data link (L), where the messages (D) sent from a particular station specify an availability status (D_res-status) for each electronic warfare resource in the station and a threat status (D_thr-status) registered by the station. A station in the group having a central planning function coordinates any jamming signals (J_A; J_B) emitted from the electronic warfare resources of the stations in the group, such that the resources are optimally used with respect to all of any registered threats (X1, X2). This coordination is based on estimated geometric interrelationships between the at least two stations in the group; estimated geometric relationships between the at least two stations in the group and at least one registered threat (X1, X2); and the respective resources of each station in the group.

Claims

1. A method of producing jamming signals from a distributed counter measures system including at least two stations (100, 200, 300) which are physically separated from one another and associated with one another in a group of stations, each station (100) having a local set (140) of electronic warfare resources (R₁₁, . . . , R_1i) including at least one resource which is adapted to generate and emit at least one type of jamming signal (J_A), the method in each station (100) comprising exchanging messages (D) over a wireless data link (L), wherein the method comprising the steps of:

exchanging the messages (D) with the at least one other station (200, 300) in the group, the messages (D) sent from a particular station (100) comprising data pertaining to an availability status (D_res-status) for each resource in the station'"'"'s (100) local set (140) and a threat status (D_thr-status) registered by the station (100); and

checking whether the station (100) shall assume a central planning function in respect of a complete set of electronic warfare resources (140+240+340) including all electronic warfare resources (R₁₁, . . . , R_1i;

R₂₁, . . . , R_1j;

R_n1, . . . , R_nk) of the at lease two stations (100, 200, 300) in the group; and

given that the station (100) is to assume the central planning function, the method comprising coordinating any emission of jamming signals (J_A;

J_B) from the resources in the complete set based on;

estimated geometric interrelationships between the at least two stations (100, 200, 300) in the group,

estimated geometric relationships between the at least two stations (100, 200, 300) in the group and at least one threat (X1, X2) registered by at least one station in the group, and

the respective local set (140, 240, 340) of each station (100, 200, 300) in the group.

2. The method according to claim 1, wherein specifying signal parameter information pertaining to a number of known threats;

specifying the electronic warfare resources of the complete set (140+240+340); and

identifying, for each of said threats, at least one of the resources in the complete set (140+240+340) that is estimated to constitute an appropriate counter measure to combat the threat.

3. The method according to claim 2, wherein for each combination of threat and appropriate counter measure specifying whether the threat is preferably combated by means of distributed counter measures involving emission of jamming signals from two or more stations, or by means of jamming signals emitted from a singular station.

4. The method according to claim 1, wherein provided that station (100) has the central planning function, the method comprising coordinating the emission of jamming signals (J_A;

J_B) from the stations (100, 200, 300) in the group such that an overall use of the resources in the complete set (140+240+340) is estimated to be optimized with respect to all of the at least one registered threat (X1, X2).

5. The method according to claim 1, wherein

specifying in each station (100), for each electronic warfare resource (R₁₁, . . . , R_1i) in the station'"'"'s (100) local set (140), an availability status (D_res-status) reflecting whether the resource is currently available for emitting jamming signals;

registering, repeatedly, a threat status (D_thr-status) reflecting any existence of threats (X1, X2);

transmitting, repeatedly, messages (D) to the at least one other station (200, 300) in the group, the transmitted messages (D) comprising the availability status (D_res-status) and a threat status (D_thr-status);

receiving, repeatedly, messages (D) from the at least one other station (200, 300) in the group, the received messages (D) comprising availability statuses (D_res-status) and threat statuses (D_thr-status) in respect of each of the at least one other station (200, 300) in the group; and

updating, based on the received messages (D), a group resource listing (552) with a current resource activation status for each electronic warfare resource (R₂₁, . . . , R_2j;

R_n1, . . . , R_nk) included in the at least one other station (200, 300) of the group.

6. The method according to claim 5, wherein provided that station (100) not has the central planning function, the method comprising:

receiving request messages (D_req) over the wireless data link (L); and

/or

receiving deactivation orders (D_cut) over the wireless data link (L); and

activating respective deactivating specified electronic warfare resources in response to any received request messages (D_req) and/or messages orders (D_cut).

7. The method according to claim 6, wherein provided that station (100) not has the central planning function, the method in case of at least one received request message (D_req) further comprising:

comparing a first set of threat parameters of each of the at least one received request messages (D_req) with any second set of threat parameters associated with threat statuses (D_thr-status) registered by the station (100) to obtain a correlated threat parameter set for each threat in respect of which request messages (D_req) has been received; and

activating the electronic warfare resources specified in the at least one received request message (D_req) based on each correlated threat parameter set.

8. The method according to claims 6, wherein provided that station (100) not has the central planning function, the method comprising sending a reject message in response to a received request message (D_req) if an electronic warfare resource specified in the request message (D_req) cannot be activated by the station (100).

9. The method according to claim 5, wherein provided that the resource handling unit (150) has the central planning function, the method comprises:

compiling, based on the threat statuses (D_thr-status) and any received messages (D) from the other stations (200;

300) in the group, a threat listing (555) comprising all threats (X1, . . . , Xm) registered by at least one station (100, 200, 300) in the group;

determining, based on the group resource listing (552), for each threat (X1, . . . , Xm) in the threat listing (555) whether the threat appears to be combated by an appropriate resource in the complete set (140+240+340); and

if an alternative distribution of electronic warfare resources different from a current distribution given by the group resource listing (552) is estimated to be superior to the current distribution in respect of jamming efficiency sending out request messages (D_req) and/or deactivation orders (D_cut) with such addressees and specifications that the electronic warfare resources (R₁₁, . . . , R_1i;

R₂₁) . . . , R_1j;

R_n1, . . . , R_nk) of the at least two stations (100, 200, 300) in the group emit jamming signals according to the alternative distribution.

10. The method according to claim 5, wherein

provided that the station (100) has the central planning function, the method comprising maintaining emission of a particular jamming signal (J_A) until:

all threats combated by the particular jamming signal (J_A) have ceased to constitute threats, or

given the threat listing (555) and the group resource listing (552), another electronic warfare resource (R₁₁, . . . , R_1i;

R₂₁, . . . R_1j;

R_n1, . . . , R_nk) appears to be more appropriate to instead emit the particular jamming signal (J_A); and

otherwise, the method comprising maintaining emission of a particular jamming signal (J_B) until receiving a deactivation order (D_cut) in respect of that jamming signal (J_B) over the wireless data link (L).

11. A computer program directly loadable into the internal memory of a digital computer, comprising program code for producing jamming signals from a distributed counter measures system including at least two stations (100, 200, 300) which are physically separated from one another and associated with one another in a group of stations, each station (100) having a local set (140) of electronic warfare resources (R₁₁, . . . , R_1i) including at least one resource which is adapted to generate and emit at least one type of jamming signal (J_A), the method in each station (100) comprising exchanging messages (D) over a wireless data link (L), the program code comprises sets of instructions for:

exchanging the messages (D) with the at least one other station (200, 300) in the group, the messages (D) sent from a particular station (100) comprising data pertaining to an availability status (D_res-status) for each resource in the station'"'"'s (100) local set (140) and a threat status (D_thr-status) registered by the station (100); and

checking whether the station (100) shall assume a central planning function in respect of a complete set of electronic warfare resources (140+240+340) including all electronic warfare resources (R₁₁, . . . , R_1i;

R₂₁, . . . , R_1j;

R_n1, . . . , R_nk) of the at lease two stations (100, 200, 300) in the group; and

given that the station (100) is to assume the central planning function, the method comprising coordinating any emission of jamming signals (J_A;

J_B) from the resources in the complete set based on;

estimated geometric interrelationships between the at least two stations (100, 200, 300) in the group,

estimated geometric relationships between the at least two stations (100, 200, 300) in the group and at least one threat (X1, X2) registered by at least one station in the group, and

the respective local set (140, 240, 340) of each station (100, 200, 300) in the group.

12. A computer program product in a computer readable medium having computer program code recorded thereon, wherein the program code includes sets of instructions comprising:

first computer instructions for exchanging the messages (D) with the at least one other station (200, 300) in the group, the messages (D) sent from a particular station (100) comprising data pertaining to an availability status (D_res-status) for each resource in the station'"'"'s (100) local set (140) and a threat status (D_thr-status) registered by the station (100); and

second computer instructions for checking whether the station (100) shall assume a central planning function in respect of a complete set of electronic warfare resources (140+240+340) including all electronic warfare resources (R₁₁, . . . , R_1i;

R₂₁, . . . , R_1j;

Rn_n1, . . . , R_nk) of the at lease two stations (100, 200, 300) in the group; and

given that the station (100) is to assume the central planning function, the method comprising coordinating any emission of jamming signals (J_A;

J_B) from the resources in the complete set based on;

third computer instructions for estimated geometric interrelationships between the at least two stations (100, 200, 300) in the group,

fourth computer instructions for estimated geometric relationships between the at least two stations (100, 200, 300) in the group and at least one threat (X1, X2) registered by at least one station in the group, and

fifth computer instructions for the respective local set (140, 240, 340) of each station (100, 200, 300) in the group.

13. An electronic counter measures station (100) to be included as one of at least two stations (100, 200, 300) in a distributed counter measures system for radiating jamming signals, where the at least two stations (100, 200, 300) are physically separated from one another and associated with one another in a group of stations, the station (100) comprising:

a communication unit (160) adapted to exchange messages (D) over a wireless data link (L); and

a local set (140) of electronic warfare resources (R₁₁, . . . , R_1i) including at least one resource adapted to generate and emit at least one type of jamming signal (J_A), wherein the station (100) is associated with at least one threat warning system (105) adapted to register threats (X1, X2) and in response thereto produce a threat status (D_thr-status);

the communication unit (160) is adapted to exchange the messages (D) with the at least one other station (200, 300) in the group, the messages (D) sent from a particular station (100) comprise data pertaining to an availability status (D_res-status) for each resource in the station'"'"'s (100) local set (140) and the threat status (D_thr-status) registered by the station (100); and

the station (100) comprises a resource handling unit (150) adapted to assume a central planning function in respect of a complete set of electronic warfare resources (140+240+340) including all electronic warfare resources (R₁₁, . . . , R_1i;

R₂₁, . . . , R_1j;

R_n1, . . . , R<sub>nk) of the at least two stations (100, 200,

     300) in the group, and when having the central planning function the resource handling unit (150) is adapted to coordinate any jamming signals (JA</sub>;

J_B) emitted from the resources in the complete set (140+240+340) based on;

estimated geometric interrelationships between the at least two stations (100, 200, 300) in the group,

estimated geometric relationships between the at least two stations (100, 200, 300) in the group and at least one registered threat (X1, X2), and

the respective local set (140, 240, 340) of each station (100, 200, 300) in the group.

14. The station (100) according to claim 13, wherein it comprises a database (110) including:

a threat library (411) specifying signal parameter information pertaining to a number of known threats;

a counter measure library (412) specifying the electronic warfare resources of the complete set (140+240+340); and

a table (413) which for each of said threats identifies at least one of the resources in the complete set (140+240+340) that is estimated to constitute an appropriate counter measure to combat the threat.

15. The station (100) according to claim 14, wherein the table (413) for each combination of threat and appropriate counter measure specifies whether the threat is preferably combated by means of distributed counter measures involving emission of jamming signals from two or more stations, or by means of jamming signals emitted from a singular station.

16. The station (100) according to claim 13, wherein when having the central planning function, the resource handling unit (150) is adapted to coordinate the emission of jamming signals (J_A;

J_B) from the stations (100, 200, 300) in the group such that an overall use of the resources in the complete set (140+240+340) is estimated to be optimized with respect to all of the at least one registered threat (X1, X2).

17. The station (100) according to claim 13, wherein the resource handling unit (150) is associated with:

a local resource listing (551) which for each electronic warfare resource (R₁₁, . . . , R_1i) in the local set (140) specifies whether the resource is currently available for emitting jamming signals; and

a group resource listing (552) which specifies an activation status for each electronic warfare resource (R₂₁, . . . , R_2j;

R_n1, . . . , R_nk) included in the at least one other station (200, 300) of the 20 group; and

the resource handling unit (150) is adapted to update the group resource listing (552) with a current resource activation status for each resource of the electronic warfare resource (R₂₁, . . . , R_2j;

R_n1, . . . , R_nk) included in the other stations (200, 300) in the group based on any received messages (D) from the other stations (200;

300) in the group.

18. The station (100) according to claim 17, wherein the resource handling unit (150) when not having the central planning function, is adapted to:

receive request messages (D_req) and deactivation orders (D_cut) via the communication unit (160) and wireless data link (L); and

activate respective deactivate specified electronic warfare resources in response to any received request messages (D_req) and/or deactivation orders (D_cut).

19. The station (100) according to claim 18, wherein the resource handling unit (150) when not having the central planning function is adapted to, in case of at least one received request message (D_req) compare a first set of threat parameters of each of the at least one received request messages (D_req) with any second set of threat parameters associated with threat statuses (D_thr-status) registered by the station (100) to obtain a correlated threat parameter set for each threat in respect of which request messages (D_req) has been received;

and

activate the electronic warfare resources specified in the at 15 least one received request message (D_req) based on each correlated threat parameter set.

20. The station (100) according to claim 18, wherein, the resource handling unit (150) when not having the central planning function is adapted to control the communication unit (160) to send a reject message in response to a received request message (D_req) if an electronic warfare resource specified in the request message (D_req) cannot be activated by the station (100).

21. The station (100) according to claim 17, wherein the resource handling unit (150) when having the central planning function, is adapted to:

compile, based on the threat statuses (D_thr-status) produced by the at least one threat warning system (105) and any received messages (D) from the other stations (200;

300) in the group, a threat listing (555) comprising all threats (X1, . . . , Xm) registered by at least one station (100, 200, 300) in the group;

determine, based on the group resource listing (552), for each threat (X1, . . . , Xm) in the threat listing (555) whether the threat appears to be combated by an appropriate resource in the complete set (140+240+340); and

if an alternative distribution of electronic warfare resources different from a current distribution given by the group resource listing (552) is estimated to be superior to the current distribution in respect of jamming efficiency

control the communication unit (150) to send out request messages (D_req) and/or deactivation orders (D_cut) with such addressees and specifications that the electronic warfare resources (R₁₁, . . . , R_1i;

R₂₁, . . . , R_1j;

R_n1, . . . , R_nk) of the at least two stations (100, 200, 300) in the group emit jamming signals according to the alternative distribution.

22. The station (100) according to claim 18, wherein the resource handling unit (150) is adapted to:

when having the central planning function, maintain emission of a particular jamming signal (J_A) until;

all threats combated by the particular jamming signal (J_A) have ceased to constitute threats, or

given the threat listing (555) and the group resource listing (552), another electronic warfare resource (R₁₁, . . . , R_1i;

R₂₁, . . . R_1j;

R_n1, . . . R_nk) appears to be more appropriate to instead emit the particular jamming signal (J_A); and

otherwise, maintain emission of a particular jamming signal (J_B) until the communication unit (160) receives a deactivation order (D_cut) in respect of that jamming signal (J_B) over the wireless data link (L).