Sinusoidal Waveform Receiver Using Data Notches for High Spectral Efficiency

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Solution Overview

Problem

Current data communication systems face challenges in increasing data throughput and addressing signal degradation, particularly due to transmission path delay, interference, and non-linearity, with existing modulation techniques like Amplitude Modulation, Frequency Modulation, QAM, QPSK, PSK, and APSK having inefficiencies in power usage, bandwidth, and error rates.

Innovation Solution

The method involves periodic waveform modulation by encoding input digital data at selected phase angles of a sinusoidal waveform to create a modulated sinusoidal waveform with data notches, using a digital-to-analog converter to generate an encoded analog waveform, and employing carrier stacking to achieve high spectral efficiency, where adjacent modulated sinusoidal waveforms are separated by less than 15 Hz with sidebands at least 50 dB below the main signal power.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional modulation techniques (AM, FM, QAM, QPSK, PSK, APSK) are used to increase data throughput, then data transmission capacity is improved, but power efficiency deteriorates and bandwidth utilization becomes suboptimal

Engineering Contradiction:

Improvedata throughputVSAvoidpower efficiency

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent changes the fundamental parameter of waveform modulation from conventional AM/FM/QAM/PSK to encoded sinusoidal waveforms with data notches. By encoding data in the absence or reduction of sinusoidal energy at specific time intervals rather than modulating amplitude, frequency, or phase, the system achieves high data throughput while maintaining constant envelope and optimal power efficiency

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the mechanical/modulation-based systems (AM, FM, QAM, PSK) with a novel encoded sinusoidal waveform system where data is encoded in the temporal pattern of sinusoidal energy presence and absence, achieving superior power efficiency and spectral efficiency without conventional modulation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If QAM is used to increase data rates, then throughput is improved, but peak to average power ratio increases

Engineering Contradiction:

Improvedata rateVSAvoidpeak to average power ratio

Core Design Contradiction:

ProductivityVSPower

Solution Approach 1:

The patent changes the modulation parameter from amplitude and phase (QAM) to temporal encoding of sinusoidal energy presence and absence. This maintains constant envelope (unity peak-to-average power ratio) while achieving high data rates through multiple notches per waveform period

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses periodic sinusoidal waveforms where data is encoded in the pattern of notches (energy reductions) occurring at specific intervals within each period. Multiple data bits are encoded per period through multiple notches, achieving high data rates while maintaining constant power envelope

Inventive Principle:

Principle #19Periodic action

3Productivity

If spectral efficiency is increased to transmit more data, then data capacity is improved, but signal degradation from interference and non-linearity worsens

Engineering Contradiction:

Improvedata capacityVSAvoidsignal degradation

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent changes from conventional modulation parameters (amplitude, frequency, phase) to temporal encoding in sinusoidal energy presence/absence. This creates a more robust signal that is less susceptible to interference and non-linear distortion while maintaining high spectral efficiency

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces conventional modulation schemes with encoded sinusoidal waveforms that encode data in the temporal pattern of energy presence and absence, creating a more interference-resistant signal while achieving high data capacity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS10397030B2Receiver for high spectral efficiency data communications system using encoded sinusoidal waveforms

Publication Date: 2019.08.27 TERAWAVE

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.