Pulse Signal Demodulation Using Duty Ratio and Period Detection
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Solution Overview
Problem
Existing data communication systems face limitations in increasing communication rate due to the load capacity requirements of drive circuits, leading to rounding issues on pulse signal edges, which restrict the frequency of pulse signals.
Innovation Solution
A data carrier apparatus with determination units to analyze the duty ratio, period, and data value of pulse signals, using multiple duty ratios and frequencies to transmit 2-bit data in one cycle, allowing for higher communication rates without increasing load capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the frequency of the pulse signal is increased to increase the communication rate, then the communication rate is improved, but the load capacity of the drive circuit must be increased which causes rounding on the pulse signal edges
Solution Approach 1:
The invention changes the parameters of the pulse signal from frequency-based to duty ratio-based encoding. By using different duty ratios (e.g., 25%, 50%, 75%) to represent different data values, the system achieves higher communication rates without requiring higher signal frequencies, thus avoiding the rounding issues that occur at high frequencies
Solution Approach 2:
The invention introduces dynamic duty ratio adjustment within each pulse cycle. The drive circuit dynamically changes the duty ratio of each pulse according to the data being transmitted, allowing multiple data bits to be encoded in a single pulse cycle. This dynamic parameter adjustment enables higher effective communication rates without increasing the base frequency
2Productivity
If the load capacity of the drive circuit is increased to transmit signals and power, then the communication rate can be increased, but rounding occurs on the rising edge and falling edge of the pulse signal
Solution Approach 1:
The invention transitions from frequency-based data encoding to duty ratio-based encoding. By representing multiple data values through different duty ratios at a fixed frequency, the system achieves higher communication rates without increasing the drive circuit's load capacity or frequency, thereby maintaining precise pulse signal edges
Solution Approach 2:
The invention uses periodic pulse signals with varying duty ratios within each period. By encoding data in the duty ratio of periodic pulses rather than increasing pulse frequency, the system maintains clean rising and falling edges while achieving higher data transmission rates through multiple data bits per pulse cycle
Data Source
AI summary
A data carrier apparatus includes a duty detector configured to determine a duty ratio of each pulse of a pulse signal that is received, a frequency detector configured to determine a period of each pulse of the pulse signal, and a demodulator configured to determine a value of data being carried by the pulse signal based on a determination result of the duty detector unit and a determination result of the frequency detector.