Electronic support measures (ESM) duty dithering scheme for improved probability of intercept at low ESM utilization

• US 6,020,842 A
• Filed: 10/21/1998
• Issued: 02/01/2000
• Est. Priority Date: 10/21/1998
• Status: Expired due to Fees

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: Raytheon Company (Rtx Corporation)
• Inventors: Lewis, William L., Kardatzke, Jeffrey A.
• Primary Examiner(s): Sotomayor, John B.
• Application Number:
  US09/176,562
• Time in Patent Office: 468 Days
• Field of Search: 342/13, 342/16, 342/17, 342/18, 342/19, 342/20, 342/88, 342/99, 342/98, 342/102, 342/192, 342/175, 342/194, 342/195, 342/205, 342/162, 342/163
• US Class Current: 342/13
• CPC Class Codes: G01S 13/86 Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
• CPC Class Codes: G01S 7/021 Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals

Abstract

A duty dithering method for use with electronic support measures and radar warning receivers, and the like, that provides for improved probability of intercept at low utilization levels. The electronic support measures (ESM) system and radar warning receiver are controlled by a multi-system sensor manager having an ESM scheduler. In accordance with the present method, a maximum duty cycle is chosen for the ESM system. The chosen duty cycle is allocated to the ESM system each frame by the ESM scheduler. At the beginning of each frame, the ESM scheduler picks a random offset and subtracts it from the maximum duty to compute an ESM duty for that frame. The ESM scheduler commands data collections based on the computed duty for that frame. This step is repeated each frame.

Claims

1. A duty cycle dithering method for use with electronic support measures (ESM) and radar warning receivers that provides for improved probability of intercept at low utilization levels, comprising the steps of:

choosing a maximum duty cycle for the ESM system;

allocating the chosen duty cycle to the ESM system every frame;

at the beginning of each frame, selecting a random offset for an ESM scheduler;

subtract the random offset from the maximum duty cycle to compute an ESM duty cycle for that frame;

commanding the ESM system to collect data based on the computed ESM duty cycle for that frame; and

repeating the commanding step each frame.

2. The method recited in claim 1 wherein the random offset for the duty cycle from maximum duty cycle is up to about 30% below maximum duty cycle.