Contactless Signal Processing With Analog Filters for Range and Low Delay
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Solution Overview
Problem
Existing contactless communication systems, such as those described in Patent Document 1, suffer from long signal delays due to buffering and digital signal processing, which hinder efficient communication between a reader/writer and a contactless communication apparatus.
Innovation Solution
A signal processing apparatus that performs first and second filter processing on signals received from and transmitted to a contactless communication apparatus via separate antennas, utilizing a field-programmable gate array (FPGA) for anti-reverse and noise filtering to reduce signal delays and extend communication distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If buffering and digital signal processing are performed to extend communication distance, then communication distance is extended, but signal delay increases
Solution Approach 1:
The patent extracts and removes the buffering function from the signal processing chain. By using analog filter processing instead of digital signal processing, the system eliminates the need to store signals in memory, thereby removing the time delay associated with buffering while maintaining signal quality for extended communication distance
Solution Approach 2:
The patent replaces the digital signal processing system (which requires buffering and causes delay) with an analog filter processing system. The analog filters directly process incoming signals in real-time without requiring digital conversion and storage, substituting a continuous analog process for a discrete digital process that introduces delay
2Length of stationary object
If buffering is used to extend communication distance, then communication distance is extended, but communication efficiency decreases
Solution Approach 1:
The patent removes the buffering operation from the communication system. By processing signals in real-time through analog filters without storing them temporarily, the system eliminates the time loss associated with buffer management, thereby improving communication efficiency while maintaining extended range capability
Solution Approach 2:
The patent implements continuous real-time signal processing through analog filters, ensuring that signal processing occurs without interruption or pause. This continuous processing eliminates the start-stop nature of buffered digital processing, maintaining constant communication flow and improving overall system productivity
Data Source
AI summary
The present technology relates to a signal processing apparatus, signal processing method, and program capable of extending a communication distance while reducing a signal delay in contactless communication.The signal processing apparatus performs filter processing on a signal received from a reader/writer via a first antenna, and transmits the signal to a card serving as a contactless communication apparatus via a second antenna. Furthermore, the signal processing apparatus performs filter processing on a signal received from the card via the second antenna, and transmits the signal to the reader/writer via the first antenna. The present technology can be applied to a communication system using contactless communication.