DC Balanced Symbol Modulation for Isolated Communication Power Reduction
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Solution Overview
Problem
Existing isolated communication methods face limitations in increasing communication speed due to increased current consumption, and they often fail to satisfy multiple performance indicators such as galvanic isolation, DC balance, and bi-directionality.
Innovation Solution
A transmission/reception method and device that represents multiple bits as one DC balanced symbol, modulating bit streams into a signal for transmission through an isolated communication circuit and demodulating the signal back into bit streams for data reconstruction, using a galvanic isolated communication circuit with capacitors or transformers to reduce power consumption while maintaining communication speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If communication speed is increased in galvanic isolated communication, then communication performance is improved, but current consumption increases which limits further speed increases
Solution Approach 1:
The patent merges multiple bit transmissions into a single symbol transmission. By representing two or more bits as one DC balanced symbol, the system reduces the number of separate transmission events, thereby lowering current consumption while maintaining effective data transmission rate through increased information density per symbol.
Solution Approach 2:
The patent changes the parameter of information encoding by transitioning from one-bit-per-symbol to multi-bit-per-symbol representation. This parameter change allows more data to be transmitted per communication event, reducing the frequency of transmissions and associated current consumption while maintaining communication speed.
2Reliability
If multiple performance indicators (galvanic isolation, DC balance, bi-directionality) are satisfied, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The patent employs a universal DC balanced symbol system that simultaneously satisfies multiple performance indicators. The same symbol structure achieves galvanic isolation, DC balance, and supports bi-directional communication, reducing the need for separate mechanisms for each requirement and thereby managing system complexity while maintaining high reliability.
3Loss of energy
If one DC balanced symbol represents multiple bits, then power consumption is reduced, but modulation complexity increases
Solution Approach 1:
The patent segments the modulation process into distinct stages: bit stream extraction, multi-bit to symbol mapping, and DC balanced symbol generation. This segmentation of the modulation process makes the increased complexity more manageable by breaking it into modular, reusable components rather than a monolithic complex system.
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
The method reduces power consumption while maintaining communication speed by representing multiple bits with a single DC balanced symbol, enhancing the efficiency of isolated communication systems and improving their performance indicators.
Implementation Method 1
the isolated communication circuit may be a galvanic isolated communication circuit using a capacitor or a transformer
Data Source
AI summary
A transmission/reception method and device for isolated communication is proposed. The transmission/reception method includes performing transmission, wherein bit streams are extracted from data and two or more predetermined number of bits are modulated into one DC balanced symbol so as to generate a signal in which a plurality of symbols are listed, thereby transmitting the signal through an isolated communication circuit, and performing reception, wherein the signal is received through the isolated communication circuit and the plurality of symbols included in the signal are demodulated into the two or more predetermined number of bits so as to generate the bit streams and organize the bit streams into the data. The transmission/reception method and device may reduce power consumption at the same communication speed because a plurality of bits is represented by the one DC balanced symbol.