Channel Simulation Device for Wireless Microphone Interference

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Solution Overview

Problem

Existing methods for assigning channels to multiple wireless microphones in different areas often result in interference, making it difficult to automatically assign appropriate channels without expert intervention, especially in large setups.

Innovation Solution

A channel simulation device and program that calculate desired-wave and interference-wave reception strengths using distance and reception strength parameters, allowing for automated channel planning to minimize interference between wireless microphones.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the same channel or interference-prone channel is used in different areas to increase the number of wireless microphones, then the quantity of wireless microphones increases, but interference occurs between areas

Engineering Contradiction:

Improvenumber of wireless microphonesVSAvoidinterference between areas

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The system segments the channel assignment problem by area, calculating desired-wave and interference-wave reception strengths for each area separately. By dividing the overall channel planning into area-specific calculations, the system can optimize channel assignments for each area while considering interference from other areas, thereby increasing the total number of wireless microphones without causing interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system changes the parameter of channel frequency assignment based on area-specific reception strength calculations. By adjusting which channels are assigned to which areas based on calculated interference levels, the system maximizes the number of usable wireless microphones while preventing interference between areas.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If manual channel assignment by skilled engineers is performed, then appropriate channels can be assigned without interference, but the device complexity and time consumption increase

Engineering Contradiction:

Improvechannel assignment accuracyVSAvoidoperation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system performs self-service by automatically calculating desired-wave and interference-wave reception strengths and determining optimal channel assignments without requiring skilled engineers. The automatic channel planning function computes all necessary parameters and generates channel assignments independently, eliminating the need for manual expert intervention while maintaining high reliability.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system uses feedback from reception strength calculations to automatically adjust channel assignments. By calculating interference-wave reception strengths and using this feedback information, the system iteratively determines optimal channel assignments that prevent interference, replacing manual expert judgment with automated feedback-driven optimization.

Inventive Principle:

Principle #23Feedback

3Reliability

If manual channel assignment by skilled engineers is performed, then appropriate channels can be assigned without interference, but the time consumption increases

Engineering Contradiction:

Improvechannel assignment accuracyVSAvoidtime for channel assignment

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs preliminary action by pre-calculating desired-wave and interference-wave reception strengths for all areas before final channel assignment. This preliminary calculation of reception strength parameters enables rapid automatic channel planning, eliminating the time-consuming manual trial-and-error process while maintaining accurate interference-free channel assignments.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3300268B1Channel simulation device and channel simulation program

Publication Date: 2022.10.26 TOA CORP

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AI summary

This channel simulation device (1) is provided with a memory (2) for storing a distance calculation parameter and reception strength calculation parameter, and a processor (3) for estimating desired-wave reception strength and interfering-wave reception strength on the basis of the distance calculation parameter and the reception strength calculation parameter. The desired-wave reception strength refers, for each set of two areas selected from a plurality of areas (41), to reception strength when a transmission signal transmitted from the wireless microphone (45) of one area (41x) is received by a receiver (46) in the one area (41x). The interfering-wave reception strength refers to reception strength when a transmission signal transmitted from the wireless microphone (45) of the other area (41y) is received by the receiver (46) in the one area (41x).