Layered Phase-Shifting Modulation for High Throughput and Lower Degradation
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Solution Overview
Problem
Existing data transmission techniques face challenges in increasing data throughput, addressing signal degradation, and managing transmission path delay, interference, and non-linearity.
Innovation Solution
A method and system for communication over time-based channels using layering signal modulation, where different signals are summed at various points in time to create modulated waveforms with phase characteristics representative of input data, utilizing phase shifts and layering signals of smaller amplitude relative to the carrier signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional modulation techniques (AM, FM, QAM, PSK) are used to increase data throughput, then data transmission rate improves, but signal degradation and transmission path delay increase
Solution Approach 1:
The patent segments the modulation process into multiple discrete time slots within a symbol period. Instead of continuous modulation, the signal is divided into T time slots where phase shifts are applied in specific segments. This segmentation allows the receiver to distinguish between different phase states more reliably, reducing signal degradation while maintaining high data throughput through efficient use of available time slots.
Solution Approach 2:
The patent employs periodic phase shifting patterns where the carrier signal undergoes repeated phase transitions at regular intervals within each symbol period. This periodic action creates distinct temporal patterns that enhance signal distinguishability and reduce interference, allowing reliable data transmission at high rates without excessive signal degradation.
2Productivity
If higher order modulation schemes are used to increase data rate, then bandwidth efficiency improves, but peak to average power ratio increases
Solution Approach 1:
The patent dynamically adjusts the phase shifting pattern based on the data bits being transmitted. By varying the timing and magnitude of phase shifts within the T time slots, the system achieves high data rates without requiring excessive peak power. The dynamic control allows the signal to maintain manageable power levels while still conveying information efficiently through temporal phase variations.
3Adaptability or versatility
If traditional modulation techniques are used to transmit data, then compatibility with existing systems is maintained, but transmission path delay and interference increase
Solution Approach 1:
The patent incorporates preliminary phase shifting operations at specific time slots before the main data transmission. These preliminary actions prepare the signal in advance, allowing the receiver to better synchronize and reducing overall transmission path delay. The preliminary phase shifts are designed to be compatible with existing modulation schemes while still providing temporal differentiation that reduces interference.
Data Source
AI summary
A method for layered phase-shifting signal modulation includes receiving input digital data and generating a modulated waveform by combining a plurality of phase-shifting signals with a carrier signal. The generating includes applying, to a carrier signal, a first phase-shifting signal so as to establish a first apparent phase difference between the modulated waveform and the phase of the carrier signal, applying a second phase-shifting signal to the carrier signal so as to substantially eliminate the first apparent phase difference, applying a third phase-shifting signal to the carrier signal to establish a second apparent phase difference between the modulated waveform and the phase of the carrier signal and applying a fourth phase-shifting signal to the carrier signal so as to substantially eliminate the second apparent phase difference wherein the first and second apparent phase differences represent bits of the input digital data.