Encoded Sinusoidal Receiver Using Four-Phase Data Notches
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Solution Overview
Problem
Current data communication systems face inefficiencies in data throughput and signal degradation due to issues like transmission path delay, interference, and non-linearity, particularly in modulation techniques such as Amplitude Modulation, Frequency Modulation, QAM, QPSK, PSK, and APSK, which suffer from high power usage, bandwidth inefficiency, and error-rate problems.
Innovation Solution
The system employs periodic sine wave modulation by inserting modulation perturbations at specific phase angles (45°, 135°, 225°, and 315°) in a sinusoidal waveform, allowing for higher data bits per wave period and minimizing sideband creation through energy-balancing principles, which maintain power reduction symmetry across phase angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional modulation techniques (QAM, QPSK, PSK, APSK) are used to increase data throughput, then data transmission rate is improved, but spectral efficiency deteriorates and power usage increases
Solution Approach 1:
The patent changes the fundamental parameter of waveform modulation from conventional AM/FM/PM to sinusoidal waveform modulation with encoded transitions. By encoding data in the transitions of a sinusoidal waveform rather than modulating amplitude, frequency, or phase continuously, the system achieves higher spectral efficiency while reducing power consumption compared to QAM and other conventional techniques.
2Productivity
If QAM is used for higher data rates, then data throughput is improved, but peak to average power ratio increases
Solution Approach 1:
The patent transitions from QAM's amplitude and phase modulation to sinusoidal waveform encoding where data is represented by transitions in the waveform. This parameter change eliminates the high peak-to-average power ratio problem inherent in QAM, as the sinusoidal waveform maintains constant amplitude while encoding information in transition patterns.
3Productivity
If QPSK is used for data transmission, then data throughput is improved, but signal degradation occurs due to envelope lowering and non-linearity
Solution Approach 1:
The patent changes from QPSK's phase shift keying with diagonal transitions to sinusoidal waveform encoding with controlled transitions. By avoiding diagonal transitions that pass through zero amplitude points, the system eliminates envelope lowering and reduces sensitivity to non-linearities in the transmission path, thereby improving signal reliability.
4Ease of operation
If Amplitude Modulation is used for transmission, then implementation simplicity is maintained, but bandwidth efficiency deteriorates and noise susceptibility increases
Solution Approach 1:
The patent transitions from amplitude modulation to sinusoidal waveform modulation where data is encoded in transitions. This change improves bandwidth efficiency by requiring only half the bandwidth of AM while maintaining relative implementation simplicity through the use of sinusoidal waveforms and transition detection.
5Reliability
If Frequency Modulation is used to improve noise resistance, then reliability is improved, but spectral efficiency deteriorates
Solution Approach 1:
The patent changes from frequency modulation to sinusoidal waveform modulation with encoded transitions. This approach achieves better spectral efficiency than FM while maintaining noise resistance through the use of sinusoidal waveforms and transition-based encoding that is inherently resistant to amplitude variations and noise.
Data Source
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AI summary
A method of recovering information encoded by a modulated sinusoidal waveform having first, second, third and fourth data notches at respective phase angles, where a power of the modulated sinusoidal waveform is reduced relative to a power of an unmodulated sinusoidal waveform within selected ones of the first, second, third and fourth data notches so as to encode input digital data. The method includes receiving the modulated sinusoidal waveform and generating digital values representing the modulated sinusoidal waveform. A digital representation of the unmodulated sinusoidal waveform is subtracted from the digital values in order to generate a received digital data sequence, which includes digital data notch values representative of the amplitude of the modulated sinusoidal waveform within the first, second, third and fourth data notches. The input digital data is then estimated based upon the digital data notch values.