Amplitude-Encoded Sinusoids for Efficient, Low-Noise Data Transmission
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Solution Overview
Problem
Existing data transmission techniques face challenges in increasing data throughput, addressing signal degradation, and optimizing bandwidth and power efficiency, particularly in modulation methods like Amplitude Modulation (AM), Frequency Modulation (FM), QAM, QPSK, PSK, and APSK.
Innovation Solution
A method and system using amplitude-encoded sinusoids, where each symbol waveform represents at least one bit of digital data, with half sinusoids of opposite polarities and varying amplitudes, generating encoded analog waveforms to efficiently transmit data without creating harmonics or sidebands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Amplitude Modulation is used to transmit data, then data can be transmitted over the transmission channel, but the signal is not efficient in power usage and bandwidth usage, and it is prone to high levels of noise
Solution Approach 1:
The patent changes the modulation parameter from continuous amplitude variation (AM) to discrete amplitude levels (4-AM, 8-AM, 16-AM). By quantizing the amplitude into specific discrete levels, the system achieves better power efficiency while maintaining data transmission capability. The discrete amplitude levels allow for more robust noise immunity compared to continuous AM.
2Productivity
If Amplitude Modulation is used to transmit data, then data can be transmitted over the transmission channel, but the signal is not efficient in power usage and bandwidth usage, and it is prone to high levels of noise
Solution Approach 1:
The patent transitions from continuous amplitude modulation to discrete amplitude levels. This parameter change creates distinct, separable signal levels that are more resistant to noise. The receiver can more easily distinguish between different amplitude levels even in the presence of noise, reducing error rates and improving reliability.
3Productivity
If QAM is used for higher data rates, then data throughput increases, but the peak to average power ratio becomes high, requiring ever higher power levels
Solution Approach 1:
The patent uses discrete amplitude levels (4-AM, 8-AM, 16-AM) instead of the complex I-Q constellation points used in QAM. This simplification reduces the peak to average power ratio because the amplitude variations are more controlled and predictable. The system achieves high data rates through amplitude differentiation rather than through the combination of amplitude and phase modulation used in QAM.
4Productivity
If conventional QPSK is used, then data can be transmitted with four states, but the transition between diagonal transmission symbol points passes through the zero point, causing envelope lowering to practically zero
Solution Approach 1:
The patent employs asymmetric amplitude levels that avoid the zero-crossing problem inherent in conventional QPSK. By using discrete amplitude levels that do not require passing through zero during transitions, the system maintains more consistent signal envelope levels. This asymmetry in the amplitude level selection prevents the envelope from collapsing to zero, improving signal integrity and reducing the need for complex synchronization at the receiver.
Data Source
AI summary
A system and method for data communication using amplitude-encoded sinusoids. The method includes encoding the input digital data using a plurality of symbol waveforms where each of the plurality of symbol waveforms occupies a period of a composite encoded waveform and represents at least one bit of the input digital data. A first symbol waveform of the plurality of symbol waveforms is defined by a sinusoid of a first amplitude and a second symbol waveform is defined by a sinusoid of a second amplitude different from the first amplitude. The method includes generating an encoded analog waveform from a representation of the composite encoded waveform.