RFID Reader Manchester Encoding Without Digital Filtering
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Solution Overview
Problem
RFID systems face challenges in removing high frequency components without using digital filters, which increases the size and complexity of the baseband transmitting terminal.
Innovation Solution
The RFID reader employs an encoding unit that uses two symbols with specific periods to perform Manchester encoding, allowing for the removal of high frequency components without a digital filter, by transmitting and delaying symbols based on received data states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a digital filter is used to remove high frequency components, then the high frequency components are effectively removed, but the size and complexity of the baseband transmitting terminal increases
Solution Approach 1:
The patent extracts and removes the digital filter component from the baseband transmitting terminal by implementing high frequency component removal through signal encoding techniques instead, thereby eliminating the harmful high frequency components without adding device complexity
Solution Approach 2:
The patent replaces the mechanical/digital filtering system with an encoding-based signal processing system that achieves the same high frequency removal function through symbolic representation and timing manipulation, simplifying the overall system architecture
2Loss of information
If Manchester encoding is performed using traditional methods, then data encoding is achieved, but high frequency components remain in the signal
Solution Approach 1:
The patent changes the temporal parameters of the encoding symbols by introducing specific delay periods and timing relationships between symbols, which transforms the frequency characteristics of the encoded signal to remove high frequency components while preserving data integrity
Solution Approach 2:
The patent employs periodic delay actions and rhythmic symbol transmission patterns that create a structured timing sequence, effectively filtering out high frequency components through the periodic nature of the encoding scheme while maintaining successful data transmission
Data Source
AI summary
A signal encoding apparatus and method of a radio frequency identification (RFID) reader capable of removing a high frequency component without using a digital filter, and performing Manchester encoding by using two symbols. The signal encoding apparatus of the RFID reader including an encoding unit that stores a first symbol and a second symbol; transmits the first symbol if data received after an initial state is zero (0), and returns to the initial state; delays for a given time period if the data received after the initial state is one (1); transmits the second symbol if data received after the delayed given time period is zero (0), and returns to the initial state; and transmits the first symbol if the data received after the delayed given time period is one (1), and stands by.