Hearing Aid FSK Transceiver Phase Compensation
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Solution Overview
Problem
Modern digital hearing aids face limitations in data exchange capacity between binaural devices, leading to reduced signal quality and noise interference, especially when trying to increase bit rates beyond current frequency ranges.
Innovation Solution
The implementation of a phase-compensated Binary Frequency Shift Keying (FSK) transceiver system with a resonant circuit and modulator, which adjusts phase shifts to maintain signal integrity and increase bit rates by using a controller to manage oscillators and taps for phase compensation, thereby reducing phase distortion and maintaining constant amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bit rate is increased beyond current frequency ranges, then data transmission capacity is improved, but signal quality deteriorates and noise interference increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the frequency deviation in FSK modulation to optimize the balance between data transmission capacity and signal quality. By modifying the frequency deviation parameter, the system can increase bit rate while maintaining signal integrity and reducing noise interference through adaptive parameter tuning.
2Device complexity
If phase shifts are not compensated, then device complexity is reduced, but signal integrity deteriorates due to phase distortion
Solution Approach 1:
The patent implements feedback through phase compensation mechanisms that monitor and correct phase distortion in the FSK signal. The system uses feedback loops to detect phase shifts introduced by the resonant circuit and applies compensating phase adjustments, thereby maintaining signal integrity without requiring overly complex transceiver structures.
3Use of energy by moving object
If amplitude variation is allowed, then power consumption is reduced, but signal-to-noise ratio deteriorates
Solution Approach 1:
The patent applies dynamics by implementing dynamic amplitude control that adjusts the signal amplitude based on operating conditions. The system dynamically balances power consumption and signal-to-noise ratio by modulating amplitude in response to detected signal quality metrics, achieving optimal performance across varying operational states.
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 solution enhances the signal-to-noise ratio by up to 3 dB and extends the operational range, allowing for increased data transmission without signal degradation, effectively improving the hearing aid user experience by maintaining signal quality at higher bit rates.
Implementation Method 1
a resonant circuit including a transceiver coil
Implementation Method 2
An frequency-shift-keying modulator receives a data stream and outputs a modulated signal for transmission
Data Source
Figure 1~2
Figure 3a~3b
Figure 4~7
AI summary
A frequency-shift-keying (FSK) transceiver for use in a hearing aid system and having a resonant circuit comprising a transceiver inductance (LI), said resonant circuit having a resonance frequency, and a transfer function where gain and phase are frequency dependent, wherein the transceiver comprises an FSK modulator receiving a data stream, and in response thereto outputting an FSK modulated signal to the resonant circuit for wirelessly transmission. The transceiver includes a controller monitoring the data stream received by the FSK modulator, and a phase equalizer unit controlled by the controller for substantially equalizing the phase distortion introduced by the frequency dependent resonant circuit. The invention also provides a hearing aid and a method of operating an FSK transceiver.