360° MIMO Radar With Overlapping Virtual Antennas for Phase Sync
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Solution Overview
Problem
Existing radar systems face challenges in achieving precise synchronization of subcomponents over long distances, leading to errors and losses in high-frequency signal transmission, which is unsuitable for high synchronization requirements, especially with PMCW modulation.
Innovation Solution
A radar system comprising subcomponents with transmitters, receivers, and phase locked loops, utilizing overlapping columns or rows for synchronization, generating a virtual overall arrangement through MIMO principles, and calibrating phases and amplitudes with Doppler FFT for coherent beam formation and 360° monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual sensors are controlled with a central sensor, then synchronization is achieved, but high-frequency signals experience tolerances and line losses over long distances
Solution Approach 1:
The radar system is divided into multiple independent subcomponents, each with its own transmitter and receiver. Each subcomponent generates and processes signals locally without requiring long-distance high-frequency signal transmission from a central controller, thereby reducing signal loss while maintaining synchronization through overlapping virtual antenna columns.
2Area of stationary object
If multiple radar devices are interconnected for beam bundling, then monitoring coverage is improved, but system complexity and cost increase
Solution Approach 1:
The patent introduces the concept of virtual antenna columns in the spatial domain that overlap between adjacent subcomponents. This dimensional approach allows multiple independent radar devices to be interconnected and coordinated through their overlapping virtual columns, achieving comprehensive monitoring coverage while managing system complexity through a structured virtual arrangement framework.
3Power
If transmitters and receivers are arranged to provide virtual overall arrangement, then beam bundling capability is improved, but hardware requirements and costs increase
Solution Approach 1:
Adjacent subcomponents share overlapping virtual transmitter and receiver columns, merging their capabilities to form a unified virtual overall arrangement. This sharing approach enables strong beam bundling capability across the distributed system while reducing the total hardware quantity compared to having completely separate systems, as adjacent units utilize common virtual columns.
Data Source
AI summary
The invention describes a radar system consisting of a plurality of subcomponents each individually having all components of a radar device which comprise at least transmitters, receivers, a mixer and a phase locked loop, wherein an individual phase code is generated for each transmitter; and transmitters and receivers of all subcomponents of the radar system together provide a virtual overall arrangement according to the Multiple Input Multiple Output method, wherein at least one virtual sub-arrangement of the overall arrangement, provided by a combination of transmitters of a subcomponent and receivers of a subcomponent, has at least one overlapping column or one overlapping row with another virtual sub-arrangement of the overall arrangement, wherein the at least other virtual sub-arrangement is provided by another combination of transmitters of a subcomponent and receivers of a subcomponent.