High-performance Satellite Communication
and Telemetry System
Product Introduction
The system is a high-performance satellite communication and telemetry system, specifically designed to meet the demands for high precision and reliability in modern satellite communications. It supports routine data transmission tasks and offers robust flexibility and scalability, making it well-suited for dynamic and complex communication environments.
By utilizing advanced modulation techniques like QPSK and BPSK, left-hand circular polarization, and efficient small m-sequence pseudorandom codes, the system achieves efficient and stable signal transmission, while ensuring data security and strong anti-interference capabilities.
The system adopts the design idea of one machine with multiple modes, in addition to the incoherent spread spectrum system, relay measurement and control test function, but also has the ability of sidetone ranging system, measurement and control data transmission integration system and random measurement and control system testing, and has the ability to expand to support the secondary development function of the new system measurement and control.
Product Features:
1. Wideband and High-Precision Carrier Control
- Carrier Frequency Range: The system supports both uplink and downlink with flexible adjustments across L,S,C,X,Ku,K, Ka,Q/V, ensuring compatibility with various satellite systems.
- Carrier Frequency Accuracy: Better than ±5 × 10⁻⁶, ensuring precise signal transmission.
- Carrier Frequency Stability: Standard deviation better than ±1.5 × 10⁻⁷ within 15 minutes, guaranteeing long-term communication stability.
2. Efficient Signal Modulation and Multiple Access Technology
- Modulation Techniques: QPSK and BPSK are employed to improve spectral efficiency and enhance anti-jamming capabilities.
- Multiple Access: Supports up to three simultaneous uplink broadcast signals via carrier frequency offset techniques (e.g., fup, fup+150kHz, fup-150kHz), effectively avoiding interference between stations.
3. Strong Authentication and Coding Protection
- Authentication: Both uplink and downlink feature authentication, compliant with S-band telemetry and control standards, ensuring communication security.
- Coding Method: Uses 2/3 POLAR code with an information rate of 1000bps, encoded frame length of 690 bits, providing efficient error correction and ensuring transmission reliability.
- Bit Error Rate: Uplink and downlink bit error rates are lower than 10⁻⁶, meeting high-precision communication requirements.
4. Flexible Signal Acquisition and Tracking
- Acquisition Time: Better than 10 seconds, quickly establishing communication links.
- Acquisition Probability: Up to 99%, ensuring stable signal acquisition.
- Maximum Doppler Capture and Tracking Range: Better than ±150kHz, adaptable to high-speed mobile communication environments.
- Maximum Doppler Shift Variation Rate: Better than ±3kHz/s, ensuring stable tracking in dynamic environments.
5. Superior Signal Quality and Transceiver Performance
- Receiver Sensitivity: Better than -124dBm (assuming satellite antenna gain normalized at 0dBi), ensuring reliable reception of weak signals.
- Receiver Level Dynamic Range: 50dB, accommodating a wide range of input signal strengths.
- Transmitter Out-of-Band Suppression: The satellite transmitted carrier’s side-lobe level is more than 50dB lower than the main lobe’s peak within any ±20MHz bandwidth outside the operating band, reducing interference with other communication systems.
- Transmitter-Receiver Isolation: ≥80dB, effectively isolating transmission and reception to prevent self-interference.
6. Advanced System Design and Expandability
- Polarization: Left-hand circular polarization enhances signal penetration and coverage.
- System Scalability: The design is flexible, allowing configuration and expansion according to actual needs, ensuring compatibility with future developments in communication technology.
