Bistatic Radar Receiver Using Jamming Signals for Extended Detection

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Solution Overview

Problem

GPS-based bistatic radar systems suffer from limitations such as weak signal strength, susceptibility to multi-path reflections, and jamming, which restrict their range and effectiveness in detecting targets with low radar cross-sections.

Innovation Solution

Adapting anti-jam receivers to utilize high-powered jamming signals for bistatic radar processing, incorporating direction finding and jammer characterization capabilities to derive target range and enhance imaging capabilities using synthetic aperture radar.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If GPS-based bistatic radar systems are used, then passive ranging capability is provided, but signal strength is weak and detection range is limited

Engineering Contradiction:

Improvesignal strengthVSAvoiddetection range

Core Design Contradiction:

PowerVSLength of stationary object

Solution Approach 1:

The patent converts harmful jamming signals into beneficial radar illumination sources. By receiving and processing jamming signals instead of discarding them, the system obtains high-powered electromagnetic energy for passive ranging, thereby converting an adverse factor into a useful resource for extending detection range.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Measurement precision

If GPS-based bistatic radar systems are used, then ranging capability is provided, but susceptibility to multi-path reflections reduces measurement precision

Engineering Contradiction:

Improverange measurement accuracyVSAvoidmulti-path reflections

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent extracts and isolates direct jamming signals from reflected jamming signals through signal processing techniques. By separating the direct path signal from multi-path reflections in the received signal, the system eliminates the harmful effect of multi-path interference on range measurement accuracy.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If GPS-based bistatic radar systems are used, then passive ranging is achieved, but jamming susceptibility reduces reliability

Engineering Contradiction:

Improvedetection reliabilityVSAvoidjamming

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent transforms jamming signals from harmful interference into useful radar illumination. By designing the receiver to specifically acquire and process jamming signals, the system turns an adverse environmental factor into a reliable source of electromagnetic energy for passive ranging, thereby improving detection reliability in jamming environments.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables extended range detection and imaging of targets with smaller radar cross-sections by leveraging high-powered jamming signals, overcoming limitations of GPS-based systems and providing improved situational awareness.

Implementation Method 1

at least one first antenna configured to receive one or more jamming signals

Methodology Applied

Scientific EffectElectromagnetic radiation reception: Electromagnetic Induction

Implementation Method 2

a second antenna configured to point a scanning beam to detect one or more reflections of the one or more jamming signals from a target

Methodology Applied

Scientific EffectElectromagnetic reflection: Reflection

Data Source

PatentUS20250244458A1Jamming as a bistatic radar source

Publication Date: 2025.07.31 BAE SYSTEMS INFORMATION ANDELECTRONIC SYSTEMS INTEGRATION INC

AI summary

In one example, a bistatic radar receiver includes at least one first antenna configured to receive one or more jamming signals, a second antenna configured to point a scanning beam to detect one or more reflections of the one or more jamming signals from a target, and a signal processing subsystem coupled to the at least one first antenna and to the second antenna, the signal processing subsystem configured to process the one or more jamming signals and the one or more reflections to derive a range to the target from the one or more jamming signals and the one or more reflections.