Optical Communication System Using Frequency-Shift Keying
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Solution Overview
Problem
Existing interactive technologies such as QR codes, NFC, and Beacons face limitations like distance constraints, signal interference, and mixed information sources, especially in crowded environments, where signals may be shielded or reflected, leading to unsuccessful data retrieval.
Innovation Solution
An optical communication system that uses a light emitting device to transmit encoded information through frequency codes, which are captured and decoded by a receiving device with an image capturing and processing module, utilizing frequency-shift keying technology to ensure effective data transmission and reduce data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If QR code technology is used for information transmission, then information can be retrieved through visual capture, but the image must be clearly captured at a specific distance and cannot be retrieved if shielding occurs
Solution Approach 1:
The patent replaces the static mechanical QR code system with an optical communication system using light emission and frequency modulation. The transmitting device emits light signals with encoded frequency information, and the receiving device captures these optical signals dynamically, enabling reliable information retrieval without strict distance or positioning constraints.
Solution Approach 2:
The system transitions from static QR code images to dynamic light emission and capture processes. The transmitting device continuously emits modulated light signals, and the receiving device captures images at specific time intervals, creating a dynamic communication process that adapts to environmental conditions and maintains reliability.
2Reliability
If NFC technology is used for communication, then short-range data exchange is enabled, but signals cannot be read effectively if shielded by crowds
Solution Approach 1:
The patent replaces electromagnetic NFC signals with optical communication using light emission and detection. Optical signals can penetrate through crowds and shielding materials more effectively, allowing reliable communication in crowded environments where NFC signals would be blocked.
Solution Approach 2:
The system uses frequency-shift keying to modulate light signals, encoding information in frequency variations rather than amplitude or timing. This frequency-based encoding is more resistant to environmental interference and shielding, maintaining signal reading reliability in crowded conditions.
3Adaptability or versatility
If Beacons Bluetooth technology is used, then wireless communication is achieved, but multiple Bluetooth devices cause information mixing and signals cannot penetrate crowds
Solution Approach 1:
The patent uses frequency-shift keying to encode information in the frequency domain of light signals. Each transmitting device uses a unique frequency code, and the receiving device can distinguish between multiple sources by detecting frequency differences, preventing information mixing even when multiple devices transmit simultaneously.
Solution Approach 2:
The system employs periodic light emission with specific duty cycles and timing patterns. The receiving device captures images at synchronized time intervals, allowing it to distinguish between simultaneous transmissions from multiple devices through temporal and frequency analysis, preventing information mixing.
4Reliability
If optical communication with frequency codes is used, then transmission reliability is improved, but device complexity increases due to encoding and decoding modules
Solution Approach 1:
The patent replaces complex software-based encoding and decoding algorithms with optical frequency modulation and detection. The encoding is performed through simple frequency-shift keying of light signals, and the decoding is achieved through optical spectrum analysis, reducing computational complexity while maintaining high reliability.
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 solution enables reliable data retrieval regardless of distance and environmental interference, as long as the receiving device is within the optical range, using a built-in camera and decoding software, and enhances transmission rates through real-time unsupervised classification.
Implementation Method 1
a light emitting device for illuminating and transmitting communication information; an optical driver module for driving the light emitting device to actuate based on the control signal and transmit the communication information
Implementation Method 2
an image capturing module for capturing an image stream in a time interval during the actuation of the light emitting device, wherein the image stream includes a plurality of images
Data Source
AI summary
The present disclosure provides an optical communication system, an optical communication method, and a transmitting device and a receiving device for the same. The optical communication system includes: a transmitting device for generating a control signal according to at least one encoding information to drive a light emitting device to actuate; and a receiving device for capturing a plurality of images via an image capturing module during actuation of the light emitting device, and decoding the plurality of images to obtain the encoding information.