Multi-user Signals Combined with Quadratic Residue Code for Monitoring System

Quadratic residue code (QR code) was designed to carry significantly more data than its ID counterpart. These codes are general used in industrial information tagging applications where database high data capacity, mobility, and data robustness are required. In this paper, we have developed the amplitude-lock loop (ALL) separation model combined with application of quadratic residue code. The separated multi-user signal information embedded in QR code through QR code generation. Then, we can decode to obtain the information of multi-user signals by mobile device with camera. The mobile device must embed to decode the middleware for QR code. The multi-user signals combined with quadratic residue code for monitoring system, which includes five functions. The system composed of FM model, PLL model, ALL model, QR code generation and mobile device. We adopted the MATLAB/Simulink to simulate this system then reached the purpose of monitor.