MIMO Radar With Random Sequences for 3D Object Probability Mapping
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Solution Overview
Problem
Existing radar systems face challenges in achieving high resolution 3D scanning and are susceptible to interference from other vehicles, especially under adverse weather conditions, and traditional analog modulation methods are inefficient.
Innovation Solution
A MIMO radar device using digital modulation with a random sequence generator and matched filters to transmit and receive electromagnetic waves with unique timing delays, allowing for precise 3D scanning and probability estimation of moving objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional analog modulation radar is used, then the system is simple to implement, but high resolution 3D scanning cannot be achieved
Solution Approach 1:
The patent transitions from analog modulation to digital modulation, fundamentally changing the modulation parameter domain. This enables precise control of electromagnetic wave characteristics through digital sequences, achieving high-resolution 3D scanning capability while maintaining system implementability through standardized digital processing techniques.
Solution Approach 2:
The patent replaces the mechanical/analog modulation approach with a digital signal processing system. By using digital modulators and computer-based signal generation, the system achieves superior measurement precision for 3D scanning without proportionally increasing overall system complexity, as digital systems offer programmable flexibility.
2Measurement precision
If multiple vehicles use traditional radars, then radar coverage is provided, but interference from other radars occurs and high resolution is difficult to achieve
Solution Approach 1:
The patent segments the radar signal space by assigning unique digital modulation sequences to different transmitters. This segmentation allows each vehicle's radar to operate independently in the signal domain, eliminating interference while maintaining high resolution scanning capability through sequence-specific correlation processing.
Solution Approach 2:
The patent implements a feedback mechanism through matched filter correlation, where received signals are compared against known transmitted sequences. This feedback process enables precise identification of signal origins and suppression of interfering signals, achieving high resolution scanning even in multi-vehicle environments.
3Measurement precision
If Lidar is used for 3D scanning, then high resolution is achieved, but the cost is high
Solution Approach 1:
The patent creates a digital copy of the transmitted signal sequence and uses it as a reference in matched filter processing. This digital copying approach enables precise signal reconstruction and analysis at low cost, achieving Lidar-level resolution through radar technology without requiring expensive optical components.
Solution Approach 2:
The patent changes the operating domain from optical (Lidar) to electromagnetic radio waves (radar) while maintaining high resolution through digital modulation techniques. This parameter change allows achievement of similar measurement precision using more cost-effective radar hardware and digital signal processing.
4Measurement precision
If analog modulation is used in traditional radars, then the system is simple, but high resolution scanning cannot be achieved
Solution Approach 1:
The patent substitutes analog modulation with digital modulation, replacing continuous analog signal manipulation with discrete digital sequence generation. This substitution dramatically improves modulation efficiency and enables high-resolution scanning through precise digital control of transmitted electromagnetic wave characteristics.
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
The MIMO radar device provides high-resolution 3D scanning and accurate probability estimation of moving objects by filtering out noise and interference, enhancing scanning performance.
Implementation Method 1
A multiple-input multiple-output (MIMO) radar device for scanning at least one moving object in a 3D surrounding space... each of the plurality of the receivers 22 receives the electromagnetic wave signals reflected by the at least one moving object
Data Source
AI summary
A multiple-input multiple-output (MIMO) radar device for scanning at least one moving object in space, comprising a transmitting antenna array having a plurality of transmitters, a receiving antenna array having a plurality of receivers, and a processor. The transmitters transmit electromagnetic wave signals with predetermined timing delays to the moving object, the electromagnetic wave signals are configured with random sequences. The receivers receive the electromagnetic wave signals reflected by the moving object, each receiver includes a plurality of matched filters corresponding to the plurality of transmitters, each matched filter obtains the electromagnetic wave signals with the predetermined timing delays from a corresponding transmitter and outputting a value. The processor accumulating the value outputted by each matched filter of each receiver and calculating a 3D cubic aggregate result for showing an existence probability of the at least one moving object in space.