Wireless Power and Data Transmission via Rectification
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Solution Overview
Problem
In wireless communication systems, existing methods for simultaneous information and power transfer using power dividers are inefficient as they do not utilize all available power, and converting signals to DC for charging results in information loss due to indistinguishable signal magnitudes in frequency and phase modulation schemes.
Innovation Solution
A method and apparatus that generate and transmit symbols with distinct signal sets based on predefined rules using forward and reverse rectification values, maximizing power transmission while maintaining information integrity by varying frequencies, magnitudes, and phases of sinusoidal waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If power divider is used to simultaneously transmit information and power, then information can be extracted, but power utilization efficiency deteriorates because not all power can be used for charging
Solution Approach 1:
The patent extracts only the necessary information from the signal while preserving the full power for charging. By using modulation schemes where information is encoded in signal characteristics (frequency, phase, or amplitude variations) rather than signal presence/absence, the system can separate information extraction from power utilization, allowing full power to be converted to DC for charging while still recovering information through detection of signal characteristics.
Solution Approach 2:
The transmitted signal serves dual functions simultaneously: it carries information through modulation and provides power for charging. The signal structure is designed so that the same electromagnetic wave performs both information transmission and energy transfer, with the receiver capable of simultaneously or separately processing both functions without requiring separate signal paths or power sources.
2Loss of information
If frequency modulation or phase modulation is used for information transmission, then information can be encoded, but power charging efficiency deteriorates because both symbols convert to identical DC signal magnitudes making information indistinguishable
Solution Approach 1:
The patent transitions from single-dimension DC magnitude comparison to multi-dimensional signal characteristic analysis. Instead of relying solely on DC signal magnitude differences, the system utilizes frequency, phase, or amplitude characteristics of the modulated signal itself, or employs multiple rectification paths with different phase relationships, creating additional dimensions for information discrimination that are independent of the power conversion process.
Solution Approach 2:
The patent introduces intermediary processing steps between signal reception and information detection. These intermediaries include synchronous detection mechanisms, phase-locked loops, or correlation detectors that mediate between the modulated signal and the final information output, enabling accurate information recovery from FM or PM signals while maintaining their utility for power conversion through separate processing paths.
3Measurement precision
If amplitude modulation is used to maintain different signal magnitudes for information distinction, then information can be distinguished after DC conversion, but power transfer efficiency deteriorates because power value is not constant
Solution Approach 1:
The patent segments the signal processing into distinct functional paths: one path handles information detection by analyzing modulation characteristics (frequency, phase, or amplitude variations), while another path handles power conversion by rectifying and smoothing the signal. This segmentation allows AM signals to provide both information and power, while alternative embodiments can use FM or PM with similar segmentation to maintain constant envelope for efficient power transfer.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables effective simultaneous transmission and reception of information and power, maximizing power transfer while ensuring accurate information detection and consistent power harvesting, even with varying information values.
Implementation Method 1
a first value acquired by forwardly rectifying the symbol and a second value acquired by reversely rectifying the symbol
Data Source
AI summary
The transmitting and receiving information and power in a wireless communication system are provided. A transmitting apparatus includes a transceiver, and at least one processor coupled with the transceiver. The at least one processor is configured to generate a symbol including a first set of signals for transferring power and a first information value or a second set of signals for transferring power and a second information value, and transmit the symbol. The first information and the second information may be indicated by a result value determined based on a predefined rule on the basis of a first value acquired by forwardly rectifying the symbol and a second value acquired by reversely rectifying the symbol. Each of the first value and the second value may be determined based on at least one of frequencies, magnitudes, or phases of the signals included in the symbol.