Millimeter-Wave MIMO Radar SoC for Automotive Interference Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radar systems face challenges in achieving efficient interference mitigation and increased dynamic range in automotive radar systems, particularly in environments with multiple radar systems operating at close proximity, leading to self- and like-type interference.
Innovation Solution
Implementing a MIMO radar system-on-chip in 28 nm CMOS with distributed quadrature local oscillator signals, switched-antenna inputs in low-noise amplifiers, and multiple-gated transistor LNA non-linear cancellation to enhance interference resilience and dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radar systems operate in close proximity, then coverage and detection capability are improved, but self-interference and like-type interference increase
Solution Approach 1:
The patent applies non-linear cancellation techniques that convert the harmful interference signals into beneficial information. By using multiple-gated transistor LNAs, the system deliberately allows interference signals to pass through and then cancels them out, transforming the harmful effect into an opportunity for interference mitigation and performance enhancement
Solution Approach 2:
The system changes the operating parameters of the LNA by using multiple-gated transistor configurations. This allows dynamic adjustment of the amplifier's characteristics to optimize performance in the presence of interference, changing the electrical parameters to maintain signal integrity despite harsh electromagnetic environments
2Measurement precision
If distributed architecture is used to improve angular resolution, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple LNA functions into a single integrated circuit block. The distributed antenna architecture is combined with integrated multiple-gated transistor LNAs, merging the benefits of spatial distribution with the simplicity of integrated circuit implementation, thereby reducing overall system complexity while maintaining angular resolution capability
Solution Approach 2:
The multiple-gated transistor LNA structure serves multiple functions simultaneously: it provides low-noise amplification, interference cancellation, and adaptive impedance matching. This multi-functionality reduces the need for separate components, simplifying the distributed architecture while maintaining measurement precision
3Object-generated harmful factors
If switched-antenna inputs are implemented in LNA, then interference mitigation is improved, but device complexity increases
Solution Approach 1:
The patent merges the antenna switching function with the LNA input stage into a single integrated structure. The switched-antenna inputs are directly integrated into the multiple-gated transistor LNA, combining two functions that would traditionally be separate components, thereby reducing device complexity while maintaining interference mitigation capability
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 solution achieves improved angular resolution and interference mitigation, enabling the system to operate effectively in complex environments, enhancing the radar performance by integrating the system with a fully integrated digital-modulated radar system-on-chip.
Implementation Method 1
The receivers are configured to receive radio signals that include the transmitted radio signals transmitted by the plurality of transmitters and reflected from objects in an environment
Implementation Method 2
a local oscillator configured to output a signal that is distributed to each transmitter of the plurality of transmitters and to each receiver of the plurality of receivers
Data Source
AI summary
A radar sensing system including transmitters and receivers. The transmitters are configured for installation and use in a vehicle and configured to transmit radio signals. The receivers are configured for installation and use in the vehicle and configured to receive radio signals that include the transmitted radio signals transmitted by the plurality of transmitters and reflected from objects in an environment. The transmitters comprise millimeter wave transmitters. The receivers comprise millimeter wave receivers.