Phase-Shift Message Embedding in Modulated Signals
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Solution Overview
Problem
Existing modulation techniques such as Amplitude Modulation (AM), Frequency Modulation (FM), QAM, QPSK, and PSK face inefficiencies in power usage, bandwidth, spectral efficiency, and signal distortion, particularly at high data rates, leading to challenges in increasing data throughput and addressing signal degradation during transmission.
Innovation Solution
A method and apparatus for generating a multi-component signal by combining a modulated waveform with a carrier signal and layering signals, where phase shifts within the modulated waveform encode digital data, allowing for efficient data transmission through time-based signal layering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional modulation techniques (AM, FM, QAM, QPSK, PSK) are used to increase data throughput, then data transmission capability is improved, but power usage efficiency deteriorates and signal degradation increases
Solution Approach 1:
The patent segments the modulation process into distinct components: a carrier signal and multiple modulated waveforms. Each waveform is generated by multiplying the carrier by a modulating signal, allowing independent control and optimization of each component's power and spectral characteristics. This segmentation enables efficient power usage while maintaining high data throughput through selective activation of waveforms.
Solution Approach 2:
The patent embeds multiple modulated waveforms within the carrier signal structure, creating a nested hierarchy where waveforms are contained within the carrier framework. This nesting allows the system to achieve high data rates through waveform multiplication while the carrier provides a stable power foundation, resolving the contradiction between throughput and power efficiency.
2Productivity
If conventional modulation techniques are used to increase data throughput, then data transmission capability is improved, but bandwidth usage deteriorates
Solution Approach 1:
The patent segments the spectral content into distinct carrier and waveform components, allowing the carrier to occupy a narrow bandwidth while multiple waveforms are multiplexed in the time domain. This segmentation enables high data throughput without proportionally increasing bandwidth, as the waveforms are efficiently packed within the carrier's spectral footprint.
Solution Approach 2:
The patent transitions from conventional frequency-domain modulation to a time-domain multiplexing approach, adding a temporal dimension to the transmission. By multiplying waveforms in the time domain rather than spreading data across frequency bands, the system achieves high throughput without bandwidth expansion, effectively using time as an additional resource dimension.
3Productivity
If conventional modulation techniques are used to increase data throughput, then data transmission capability is improved, but spectral efficiency deteriorates
Solution Approach 1:
The patent nests multiple data-carrying waveforms within the carrier signal structure, creating an efficient spectral hierarchy. The carrier provides a stable spectral foundation while embedded waveforms utilize the available spectral space optimally, achieving high data throughput with minimal spectral waste and improved overall spectral efficiency.
Solution Approach 2:
The patent employs dynamic waveform multiplication where the modulating signals can be activated or deactivated based on transmission requirements. This dynamic control allows the system to adapt spectral usage in real-time, achieving high throughput when needed while maintaining spectral efficiency by activating only the necessary waveforms, thereby reducing energy loss in the spectrum.
Data Source
AI summary
A system for embedding message waveforms within conventionally modulated signals includes an input buffer configured to store input digital data. A time domain modulator generates auxiliary waveform data based upon the input digital data where phase shifts within selected periods of an auxiliary waveform represented by the auxiliary waveform data relative to a carrier signal data encode the input digital data within the auxiliary waveform. A mixer is configured to mix the auxiliary waveform data and modulation data representing a modulated signal and thereby produce a multi-component signal. One or more digital-to-analog converters generate an encoded analog waveform from a representation of the multi-component signal.