System and method for reducing the probability of detection of a communication and sensor mast

• US 9,876,281 B2
• Filed: 08/06/2014
• Issued: 01/23/2018
• Est. Priority Date: 08/09/2013
• Status: Active Grant

• Current Assignee: Comrod AS (Habu Holding AS)
• Original Assignee: Comrod AS (Habu Holding AS)
• Inventors: Dybvik, Tor Mathias, Sjberg, Jan Ove
• Primary Examiner(s): Nguyen, Hoang
• Application Number:
  US14/908,638
• Publication Number:
  US 20160172751A1
• Time in Patent Office: 1,266 Days
• CPC Class Codes: G01S 2013/0281 LPI, Low Probability of Intercept radar
• CPC Class Codes: H01Q 1/1242 Rigid masts specially adapted for supporting an aerial
• CPC Class Codes: H01Q 3/04 for varying one co-ordinate of the orientation
• CPC Class Codes: H04B 10/112 Line-of-sight transmission over an extended range
• CPC Class Codes: H04K 2203/32 including a particular configuration of antennas
• 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 3/224 with countermeasures at transmission and/or reception of the jammed signal, e.g. stopping operation of transmitter or receiver, nulling or enhancing transmitted power in direction of or at frequency of jammer
• CPC Class Codes: H04K 3/25 based on characteristics of target signal or of transmission as countermeasure against surveillance H04K3/827, e.g. using direct sequence spread spectrum or fast frequency hopping spread spectrum techniques H04B1/69
• 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 system and method are for reducing the probability of detection of a Line of Sight type communication and sensor mast. The mast has an upper portion extending upwardly relatively the ground, and a lower portion closer to the ground than the upper portion. The mast at the upper portion is equipped with at least a communication or sensor element. The mast is equipped with an actuator that, based on calculated instructions, is designed to alter the elevation above ground of the mast upper portion so as to achieve an acceptable signal quality with the upper portion of the mast at the lowest possible elevation.

Claims

1. A system for a Line of Sight type communication and sensor mast, the system comprising a mast having an upper portion extending upwardly relatively relative to the ground, and a lower portion closer to the ground than the upper portion, wherein the mast at the upper portion is equipped with at least a communication or sensor element, wherein the mast is equipped with an actuator, and wherein the actuator, based on calculated instructions, is configured to alter the elevation above ground of the upper portion of the mast so as to achieve a desired signal quality with the upper portion of the mast at a lowest possible elevation to reduce the probability of detection of the mast.

2. The system according to claim 1, wherein the system is configured for first extending the mast until the signal quality is desirable and then retracting the upper portion as much as possible retaining the signal quality.

3. The system according to claim 1, wherein the calculated instructions includes data from a radio propagation analysis.

4. The system according to claim 1, wherein the calculated instructions includes data from a geospatial database.

5. The system according to claim 1, wherein the calculated instructions includes feedback data.

6. The system according to claim 5, wherein the feedback data includes Received Signal Strength Indication data.

7. The system according to claim 1, wherein the initial elevation above ground is calculated in a mission planning system.

8. The device according to claim 1, wherein calculations and height adjustment are repeated sufficiently often to follow a moving object.

9. The device according to claim 1, wherein the communication element includes any signals requiring Line of Sight or near Line of Sight.

10. A method for using a Line of Sight type communication and sensor mast, the mast having an upper portion extending upwardly relative to the ground, and a lower portion closer to the ground than the upper portion, wherein the mast at the upper portion is equipped with at least a communication or sensor element, and an actuator, the method comprising altering the elevation above ground of the upper portion of the mast, based on calculated instructions, so as to achieve a desired signal quality with the upper portion of the mast at a lowest possible elevation to reduce the possibility of detection of the mast.

11. The method according to claim 10, wherein the method comprises extending the mast until the signal quality is acceptable and then retracting the upper portion as much as possible retaining the signal quality.

12. The system according to claim 10, wherein the method comprises including use of data from a radio propagation analysis in the calculated instructions.

13. The system according to claim 10, wherein the method comprises including data from a geospatial database analysis in the calculated instructions.

14. The system according to claim 10, wherein the method comprises including data from a feedback analysis in the calculated instructions.