Electronic Device Root-MUSIC Processing for Object Detection

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Solution Overview

Problem

Existing object detection technologies, such as radar and LIDAR, face challenges in accurately estimating the direction of arrival of reflected waves, leading to suboptimal object detection accuracy.

Innovation Solution

The electronic device employs a Root-MUSIC method that utilizes a signal processing unit to estimate the direction of arrival of reflected waves by satisfying specific requirements related to the distance and argument of RMP solutions in the complex plane, enhancing object detection accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional object detection technologies (radar, LIDAR) are used to estimate direction of arrival, then basic detection functionality is maintained, but detection accuracy is insufficient

Engineering Contradiction:

Improvedirection of arrival estimation accuracyVSAvoidobject detection accuracy

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent applies parameter changes by modifying the Root-MUSIC polynomial solutions through specific constraints on the complex plane. The method transforms the direction of arrival estimation by imposing requirements on the distance and argument of RMP solutions, thereby improving measurement precision without compromising detection reliability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces conventional direction of arrival estimation methods with an improved Root-MUSIC algorithm that uses algebraic equations and complex plane analysis. This substitution of the estimation mechanism enables more accurate direction calculation by leveraging mathematical transformations rather than traditional signal processing approaches

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If Root-MUSIC method is used to estimate direction of arrival, then detection accuracy improves, but computational complexity increases due to complex plane analysis requirements

Engineering Contradiction:

Improvedirection of arrival estimation accuracyVSAvoidsignal processing complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-establishing the constraints on RMP solutions in the complex plane before performing direction of arrival estimation. By defining the distance and argument requirements in advance, the method simplifies the subsequent calculation process and reduces computational complexity while maintaining high accuracy

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12461236B2Electronic device, method for controlling electronic device, and program

Publication Date: 2025.11.04 KYOCERA CORP

AI summary

An electronic device includes a transmission antenna that transmits a transmission wave, a plurality of reception antennas that receive a reflected wave that is the transmission wave having been reflected, and a signal processing unit that detects an object with a subspace method, based on a transmission signal transmitted as the transmission wave and a reception signal received as the reflected wave. The signal processing unit estimates a direction of arrival of the reflected wave, based on solutions of an algebraic equation Root-MUSIC Polynomial (hereinafter referred to as “RMP solutions”) in a Root-MUSIC method that satisfy a first requirement and a second requirement in terms of positions of the RMP solutions in a complex plane. The first requirement is a requirement related to a distance between a unit circle and each of the RMP solutions in the complex plane. The second requirement is a requirement related to a distance or an argument between at least two adjacent RMP solutions among the RMP solutions in the complex plane.