Sound Wave Communication Hardware Correction Table
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Solution Overview
Problem
Existing sound wave communication methods face issues with hardware characteristic errors and signal duplication, leading to incorrect data transmission and reception, especially when multiple sound waves overlap, due to the lack of reference frequencies for separating data in the same frequency region.
Innovation Solution
A sound wave communication device and method that utilize a hardware correction table to allocate correction frequencies for error correction and a separate reception filter frequency for accurate data reception, along with encryption and decryption processes to secure and decode sound wave signals, using Fast Fourier Transform and shift values to restore data from overlapping signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sound wave communication uses binary frequency shift keying modulation with two specific frequencies, then data transmission can be achieved, but transmission speed becomes apparently low because only 1 bit is transmitted per unit time
Solution Approach 1:
The patent changes the frequency parameter from using only two specific frequencies to using a variety of frequency sounds (music pitch frequencies). By mapping data digital values to multiple sound pitch frequencies and transmitting various frequency sounds, the system transmits multiple bits per unit time, thereby improving transmission speed while maintaining data accuracy through the structured frequency allocation and demodulation process
2Productivity
If sound wave communication uses multiple frequency sounds to transmit multiple bits per unit time, then transmission speed improves, but hardware characteristic errors cause frequency deviations leading to incorrect data reception
Solution Approach 1:
The patent introduces a feedback mechanism where the receiving terminal detects the actual received frequency, compares it with the reference frequency, and calculates a correction value. This correction value is then used to adjust subsequent demodulation operations, creating a closed-loop system that compensates for hardware-induced frequency deviations and ensures accurate data reception
Solution Approach 2:
The patent performs preliminary frequency detection and correction value calculation before actual data demodulation. By establishing the correction value in advance based on reference frequency comparison, the system prepares the demodulation process to account for hardware errors, ensuring accurate data reception from the outset
3Device complexity
If sound waves are transmitted without hardware error correction, then device complexity remains low, but frequency errors occur due to speaker characteristics causing incorrect data reception
Solution Approach 1:
The patent implements a self-service mechanism where each communication terminal independently performs frequency detection, correction value calculation, and demodulation adjustment without requiring external calibration or complex hardware modifications. The system uses its own received signals to generate correction values, making the error correction process self-contained and minimizing additional device complexity
4Device complexity
If sound wave communication lacks reference frequencies for signal separation, then device complexity remains low, but data cannot be received when multiple sound waves are duplicated in the same region
Solution Approach 1:
The patent introduces reference frequencies as intermediary signals that mediate between multiple overlapping sound waves. Each terminal transmits its data modulated on specific frequency ranges and uses reference frequencies to identify and separate its own signals from others. This intermediary reference mechanism enables reliable data reception even when multiple sound waves are duplicated in the same region
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 effectively corrects hardware characteristic errors and ensures accurate data reception even when multiple sound waves overlap, enhancing the reliability and security of sound wave communication by using encryption and decryption processes to manage frequency shifts and filter signals.
Implementation Method 1
a sound wave transmission unit for generating data frequencies allocated to data places at a predetermined base decibel level
Implementation Method 2
a sound wave reception unit for receiving a sound wave signal transmitted from the sound wave transmission unit
Implementation Method 3
extracting a decibel for each data frequency to arrange the decibel in an array
Data Source
AI summary
A device for sound wave communication, including: a hardware correction table for setting a correction frequency band; a sound wave transmission unit for generating data frequencies at a predetermined base decibel level, generating separate reception filter frequencies at the base decibel level for receiving data carried by a sound wave transmitted from the nearest location when sound waves are received, and generating the correction reference frequency at the base decibel level for correcting hardware transmission; and a sound wave reception unit for receiving a sound wave signal transmitted from the sound wave transmission unit, extracting decibel levels at each of the data frequencies to form an array of decibel levels, correcting the array by shifting the array by a correction value extracted using the hardware correction table, and reconstructing data.