Radar Signal Processing Angle Resolution

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Solution Overview

Problem

Existing radar signal processing devices face challenges in increasing angle resolution without proportionally increasing the size of the radar sensor, especially as the number of antennas increases.

Innovation Solution

The method involves receiving real data of a radar signal through an I-channel, performing range- and Doppler-fast Fourier transforms to calculate range and Doppler velocity, overlapping phase differences to generate phase difference data, and applying a Gaussian function to calculate the angle, thereby increasing angle resolution relative to the number of antennas.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the number of transmitting antennas and receiving antennas increases, then angle resolution increases, but the size of the radar sensor increases

Engineering Contradiction:

Improveangle resolutionVSAvoidsize of radar sensor

Core Design Contradiction:

Measurement precisionVSArea of stationary object

Solution Approach 1:

The patent changes the processing parameters of radar signals by applying a Gaussian function to phase difference data instead of using traditional Fourier transform methods. This parameter change in signal processing allows achieving higher angle resolution without increasing the physical number of antennas, thereby resolving the contradiction between measurement precision and device size

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the mechanical approach of increasing antenna quantity with a computational approach using Gaussian function processing. Instead of physically adding more antennas to improve angle resolution, the system substitutes mechanical expansion with mathematical processing of phase difference data, achieving the same goal without increasing sensor size

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This approach effectively enhances angle resolution without increasing the size of the radar sensor, allowing for more precise object detection and tracking in radar systems.

Implementation Method 1

a radar sensor that transmits a radar signal toward an object and receives real data of the radar signal reflected from the object

Methodology Applied

Scientific EffectRadar: Radar

Implementation Method 2

performing a range-fast Fourier transform on the radar signal that converts the real data into complex data and calculates a range, performing a Doppler-fast Fourier transform on the radar signal that calculates a Doppler velocity

Methodology Applied

Scientific EffectFast Fourier Transform:

Implementation Method 3

applying a Gaussian function to the phase difference data that calculates an angle

Methodology Applied

Scientific EffectGaussian function:

Data Source

PatentUS20250123357A1Method of processing radar signal, radar signal processing device, and display device

Publication Date: 2025.04.17 SAMSUNG DISPLAY CO LTD

AI summary

A method of processing a radar signal includes receiving real data of a radar signal through an I-channel, performing a range-fast Fourier transform on the radar signal that converts the real data into complex data and calculates a range, performing a Doppler-fast Fourier transform on the radar signal that calculates a Doppler velocity, and overlapping a phase difference of the radar signals that generates phase difference data and applying a Gaussian function to the phase difference data that calculates an angle.