Software Defined Radio (SDR) Satellite Communication Measurement and Control System
Product Introduction
The Software Defined Radio (SDR) Satellite Communication Measurement and Control System integrates self-developed uplink and downlink algorithms, supports multiple modulation schemes, and enables satellite telemetry, telecommand, and ranging functions. The platform combines the acquisition, storage, playback, and transceiver capabilities of a universal SDR. It can interact with a computer via a Gigabit Ethernet port or USB 2.0, and can also operate independently as an embedded device.
This platform is suitable for satellite communication research and teaching experiments. It does not require a PXIe chassis and can be controlled by a standard computer, which helps reduce costs. Based on a reconfigurable FPGA, it supports rapid algorithm verification, prototype development, and field testing, while reducing the number of required devices and dependency on specific facilities.
Product Features:
1. Modulation & Transmission
- Modulation Scheme：PCM-DSSS-BPSK (supports future upgrades)
- Spreading Code Type Balanced Gold Code, Length: 2¹⁰-1.
- Spreading Code Configuration Polynomial and initial phase are configurable.
- Spreading Code Rate (1.023 * n) Mcps, where n=1,2,3,…,10 (configurable).
- Telecommand Information Rate 1 kbps to 10 kbps (configurable, 1 bps step).
- Frequency Bandwidth 200 kHz to 56 MHz (configurable).
- Output Power 0 dBm to -80 dBm (adjustable, 0.5 dB step).
- Output Power Accuracy < 1 dB.
- Output Power Stability < 0.5 dB.
- Spurious/Harmonic Suppression > 70 dBc / 20 MHz.
- Baseband Code Format NRZ-L/M/S (configurable).
- Modulation Data Source Fixed sequence / Random sequence / Incremental sequence (selectable).
- IF Signal C/N₀ 50 dBHz to 100 dBHz (configurable, 1 dBHz step).
- Carrier Doppler Shift 0 to ±1500 kHz.
- Carrier Doppler Rate 0 to ±25 kHz/s.
- Doppler Simulation Mode Triangular, Sinusoidal (selectable).
- Telecommand Encoding Type BCH, Convolutional Code, POLAR Code.
- Scrambling Method Pseudo-Random Sequence (PRS).
- Output Center Frequency (Carrier Frequency) 70 MHz to 6 GHz (tunable).
- Code Length 1023.
2. Demodulation & Reception
- Demodulation Scheme: PCM-DSSS-BPSK.
- Receive Carrier Bandwidth: 200 kHz to 56 MHz (configurable).
- Input Center Frequency: 70 MHz to 6 GHz (tunable).
- Input Power Range Normal operation: -70 dBm to +10 dBm.
-Maximum non-damaging power: > +30 dBm (maximum non-damaging input power: > +10 dBm).
- Total Acquisition Time: < 4 s.
- Loop Bandwidth (BL): 1 Hz to 5 kHz (configurable, 1 Hz step).
- Spreading Code Type: Balanced Gold Code, Length: 2¹⁰-1.
- Spreading Code Rate: (1.023 * n) Mcps, where n=1,2,3,…,10 (configurable).
- Telemetry Information Rate: 1 kbps to 10 kbps (configurable, 1 bps step).
- Telemetry Code Format: NRZ-L/M/S (configurable).
- Telemetry Frame Length: 4 to 1024 bytes (configurable).
- Frame Sync Word Length: 8 to 64 bits (configurable).
- Bit Slip Tolerance: > 2 bits.
- Telemetry Encoding Type: BCH, Convolutional Code, POLAR Code.
- Descrambling Method: Pseudo-Random Sequence (PRS).
- Carrier Doppler Shift: 0 to 350 kHz.
- Carrier Doppler Rate: 0 to ±10 kHz/s.
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