Enterprises

This project aims to integrate L-band (1-2 GHz) Software-Defined Radio (SDR) technology to construct a ground-based simulated LEO satellite VoIP communication environment while deploying a highperformance computing device on the satellite side to operate an SIP server.
System Architecture - Three Core Modules :
(1) L-Band SDR Ground Station for Satellite Channel Simulation :
Utilize USRP SDR devices to establish a bidirectional communication link.
Implement VPN channel simulation, modulation/demodulation schemes, and power control mechanisms using GNU Radio.
(2) Spaceborne SIP Server Architecture :
Deploy a high-density SIP server on NVIDIA Jetson AGX Orin (256-core GPU) to support highperformance VoIP communication.
(3) End-to-End Security Mechanism : Establish a PKI-based security framework
Build a PKI system using OpenSSL and issue X.509v3 certificates.
Implement two-factor authentication (X.509 certificate + dynamic token via TOTP algorithm).
Project Focus :
Simulating a LEO satellite VoIP communication environment
Optimizing SIP server performance for efficient VoIP operations
Enhancing communication security and authentication mechanisms
This system provides a realistic and secure testbed for LEO satellite VoIP communications while ensuring robust authentication and high-performance processing

This project leverages AMD Xilinx RFSoC to construct a satellite-based Software-Defined Radio (SDR) platform, enabling hardware-level encrypted channel dynamic switching for secure communication.
Platform Integration :
(1) Reconfigurable Physical Layer - Supports AES-GCM and ChaCha20-Poly1305 encryption engines.
(2) Hardware Root of Trust - Utilizes Physically Unclonable Functions (PUF) to generate a unique device key.
(3) Secure Boot Chain - Prevents firmware tampering and ensures system integrity.
Research Focus :
(1) FPGA Resource Utilization Optimization - Target LUT utilization < 60% to enhance system efficiency.
(2) Radiation-Hardened Design - Ensuring system resilience against harsh space environments and achieving 10-year mission lifespan verification.
This project aims to enhance the security, efficiency, and reliability of satellite SDR communication, providing a highly adaptable and resilient platform for future space missions.

The satellite side utilizes a high-performance computing payload (GPGPU) provided by the TASA as the processing unit for identity authentication and data encryption, ensuring communication security and computational efficiency.
A hybrid authentication protocol is designed, integrating traditional RSA and post-quantum cryptography (NTRU algorithm). Before communication between the ground terminal and the satellite, a three-way handshake must be completed :
(1) The terminal submits an X.509 digital certificate (containing an NTRU public key).
(2) The satellite verifies the certificate chain and encrypts a temporary symmetric key using RSA-OAEP.
(3) An AES-256-GCM encrypted communication channel is established, ensuring secure data transmission.
Research Focus :
(1) Certificate Revocation Mechanism (OCSP over Satellite) – Developing an online certificate status verification method adaptable to satellite environments.
(2) Lightweight Authentication and Encryption Module – Optimizing satellite-side computation resources to enhance authentication and encryption efficiency.
This project aims to enhance the security and efficiency of satellite communications, supporting future quantum-secure communication environments.

Develop a data acquisition system based on Python tools, integrating multi-source equipment on fishing vessels (such as GPS, sonar, bird radar, and refrigeration cabin sensors), processing NMEA 0183 (RS-422/RS-232) and NMEA 2000 (CAN Bus) format data.
The system includes :
(1) Data parsing module (such as pyNMEA2 package)
(2) Anomaly filtering (such as speed/position reasonability checks)
(3) Standardized conversion (unified timestamps and units)
To ensure data is not lost during satellite communication interruptions, a local caching mechanism (such as SQLite) is designed. In addition, the system requires an industrial-grade embedded host as the core of the private network, with its main functions including :
(1) NMEA 0183/2000 protocol conversion and data fusion
(2) Local data compression and data priority tagging (divided into three levels : real-time alerts, routine monitoring, and historical data)
At the same time, integrate the onboard satellite communication antenna and satellite modem, support LEO (Low Earth Orbit) satellite communication, transmit the collected NMEA data to the low Earth orbit satellite, and then return it to the shore control center for data analysis and monitoring.
Use Tableau or Plotly Dash to develop the shore control center dashboard, integrating real-time NMEA data (such as position and power status) and historical data (such as catch volume and refrigeration cabin status).
System Functions :
(1) Real-time alerts (such as engine anomalies and abnormal refrigeration cabin temperature)
(2) Historical trend analysis (such as monthly reports on catch volume)
(3) Overview of the fishing fleet status (such as displaying all fishing vessel locations on a map)
The system aims to provide an intuitive user interface to support shore control personnel in making quick decisions.
Development of the Fleet Dispatch Optimization System :
(1) Integrate data from multiple fishing vessels (such as trajectories, catch volume, power status, fuel, freshwater, and logistical supplies), design dispatch algorithms, and calculate the optimal scheduling plan
(such as minimizing fuel consumption or maximizing catch volume).
(2) Provide dispatch recommendations (such as target fishing areas and routes) and benefit evaluations (such as expected catch volume and cost analysis).
This system aims to improve fishing vessel management efficiency and operational effectiveness, assisting shore control personnel in making precise decisions.