Detection Radar Pulse Scheduling for Simultaneous Multi-Mode Sensing

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Solution Overview

Problem

Radar systems struggle to efficiently manage time budgets for multiple tasks, such as maritime and air surveillance, while maintaining performance and avoiding degradation in range, especially when not using sub-arraying and colored emission techniques.

Innovation Solution

A method for operating a radar system that involves alternating pulses with different radar modes and polarizations in separate frequency bands within a common time window, combined with coherent and non-coherent processing to distinguish echoes, allowing simultaneous multitasking without degrading performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple radar modes are processed simultaneously using traditional interlacing strategies, then task coverage is improved, but refresh rate and detection performance deteriorate due to time budget allocation

Engineering Contradiction:

Improvemulti-task capabilityVSAvoidrefresh rate

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent merges multiple radar modes (AIR, GMTI, MMTI) into a single unified processing pipeline by receiving all echoes in a common time window and using mode identification algorithms to distinguish between different radar modes, thereby achieving simultaneous multi-task processing without traditional time-interlacing

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a universal processing architecture that handles multiple radar modes through a single reception chain and processing system, using polarization and frequency band characteristics to differentiate and process different modes concurrently, making the system multi-functional without sacrificing refresh rate

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If sub-arraying and colored emission techniques are used to achieve simultaneous tasks, then task coverage is improved, but system complexity and range performance deteriorate

Engineering Contradiction:

Improvesimultaneous task executionVSAvoidantenna system complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent extracts the task differentiation function from the antenna hardware architecture and relocates it to the signal processing domain, where polarization and frequency band characteristics are used to identify and separate different radar modes, eliminating the need for complex sub-array configurations

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical/hardware-based task separation approach (sub-arraying and colored emission) with a software-based signal processing approach that uses polarization and frequency analysis to distinguish and process multiple radar modes concurrently

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If sub-arraying and colored emission are employed for simultaneous tasks, then task coverage is improved, but detection range performance deteriorates

Engineering Contradiction:

Improvemulti-mode operationVSAvoiddetection range

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent combines multiple radar mode transmissions into a single antenna beam using the same hardware resources, receiving all echoes through a common reception chain, thereby preserving the full transmission power and detection range capabilities while enabling multi-mode operation through signal processing differentiation

Inventive Principle:

Principle #5Merging (Combining)

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 simultaneous processing of multiple radar modes with a common refresh rate, improving target detection and reducing false alarms, while maintaining system performance across various architectures.

Implementation Method 1

emission of pulses in different frequency bands, the pulses associated with the different radar modes are emitted using different polarizations

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Implementation Method 2

reception in a common time window of the echoes of the pulses

Methodology Applied

Scientific EffectElectromagnetic reflection: Reflection

Implementation Method 3

During the reception substep, echoes associated with different radar modes are distinguished by determining their polarizations

Methodology Applied

Scientific EffectPolarization: Polarisation

Data Source

PatentEP4671807A1Method for operating a detection radar and detection radar

Publication Date: 2025.12.31 THALES SA

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AI summary

The present invention relates to a method of operating a target detection radar (10) following a first radar mode and a second radar mode corresponding to Doppler modes, the method comprising the implementation of several recurrences of a signal emission/reception step (110), each Nth recurrence of said step (110) comprising the following sub-steps: + generation (111) of two consecutive pulses associated with the different radar modes and different emission directions; + emission (112) of the pulses in different frequency bands, the pulses associated with the different radar modes are emitted using different polarizations; + reception (113) in a common time window of the echoes of the pulses.