Method in a Radar System, Radar System and Device of a Radar System

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This patent describes a method and system for radar measurement using multiple non-coherent transmitting and receiving units that exchange signals, generate intermediate comparison signals from each other's transmissions, and then further process these via additional signal comparison. This approach enables the creation of coherent radar signals using distributed radar units that are not physically synchronized, facilitating accurate distance, position, and velocity measurements as well as high-resolution radar imaging. The technology is particularly valuable for distributed or networked radar systems where physically connecting all units to a single timing or frequency reference is impractical or costly.

Use CasesContent extracted from patent full text and abstract with AI.

• Vehicle localization and navigation (e.g., autonomous vehicles, drones, robotics) using distributed radar beacons or transponders.
• Industrial asset tracking and positioning within factories or warehouses.
• High-resolution imaging and mapping for surveillance, security, or geospatial applications using radar sensor arrays.
• Localization and motion measurement of robots and machinery parts in automated production environments.
• Multi-static radar setups for air traffic control, border monitoring, or maritime surveillance.
• Tracking of mobile entities carrying radar transponders (e.g., personnel, assets) within complex indoor or outdoor environments.
• Cooperative vehicle-to-vehicle distance and angle measurement for enhanced safety systems.

BenefitsContent extracted from patent full text and abstract with AI.

• Enables accurate distance and velocity measurement without requiring strict frequency or phase coherence between distributed radar units, reducing hardware complexity and costs.
• Allows construction of large synthetic apertures and high-resolution radar imaging with physically separated, independently clocked radar elements.
• Facilitates flexible and scalable radar networks where adding or moving radar units is easier and less expensive than with traditional coherent radar arrays.
• Improves data efficiency by using low-frequency comparison signals, which are easier to transmit, store, and process than full-bandwidth radar data.
• Supports a wide range of radar signal types (FMCW, OFDM, multi-ramp) for compatibility with various applications and higher resilience to interference and multipath effects.
• Reduces installation complexity as no dedicated RF cabling for reference signals is required between radar units, simplifying deployment in large areas.
• Improves positioning accuracy over traditional non-coherent secondary radar techniques, making the system suitable for precision navigation and automation.

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Inventors & Applicants

Patent Abstract

The invention relates to a method in a radar system, wherein: in a first non-coherent transmitting-receiving unit (NKSE1), a first signal (sigTX1) is generated and is transmitted, in particular emitted, via a path (SP); in a further, in particular second non-coherent transmitting-receiving unit (NKSE2), a first signal (sigTX2) is generated and is sent, in particular emitted, via the path (SP); in the first transmitting-receiving unit (NKSE1), a comparison signal (sigC12) is formed from the first signal (sigTX1) of the first transmitting-receiving unit and from such a first signal (sigTX2) received from the further transmitting-receiving unit (NKSE2) via the path (SP); and in the further transmitting-receiving unit (NKSE2), a further comparison signal (sigC21) is formed from the first signal (sigTX2) of the further transmitting-receiving unit and from such a first signal (sigTX1) received from the first transmitting-receiving unit (NKSE1) via the path (SP), wherein the further comparison signal (sigC21) is transmitted, in particular communicated, to the first transmitting-receiving unit (NKSE1) by the further transmitting-receiving unit (NKSE2). The invention further relates to a radar system and to a device of a radar system that perform such a method.