Telemetry Function Base-Band Card
Product profile and purpose
It is a general hardware platform established with high-speed and super-large-scale FPGA device as the core, it adopts all-digital software radio technology for design of the functional modules, and its products are used for receiving and demodulation of telemetry signals of aerospace vehicles, and the data is cross-linked to the computer via the CPCI bus.
Main characteristics
It can receive dual-channel or one-channel (left or right revolve) intermediate-frequency signal, the function of left-right polarization diversity synthesis, the function of digital intermediate-frequency demodulation, and can make MSD detection and TPC decoding, the function of time coder, the function of PCM simulator, and has the processing capacity for encryption and decryption interface of PCM data.
Performance indicators
Frequency band | 70MHz/140MHz |
PCM code type | NRZ-L, M, S, BIφ-L, M, S, RNRZ-L |
PCM code rate | 1Kbps~20Mbps |
FM sensitivity | -129dBw, 2Mbps, Pe ≤ 1×10-4 |
Data rate | 1Kbps~500Kbps |
BPSK sensitivity | -151dBw, 10kbps, Pe ≤ 1×10-4 |
Pseudo-code length | 63、127、255、511、1023、2047 63, 127, 255, 511, 1023, 2047 |
Telemetry frame structure | Conforming to GJB21.2A specification, and IRIG106 standard |
Pseudo-code type | GOLD, m sequence |
Demodulation system | PCM-FM、PCM-BPSK/QPSK、PCM-CDMA-BPSK |
Operating temperature | 30℃ ~ +60℃ |
Convolution code | (2,1,7), conforming to telemetry standard GJB 1549-92 Telemetry Channel Coding |
Encryption and decryption function | It supports both encrypted status and decrypted status; under decrypted status, both the encrypted data and decrypted data can be saved at the same time |
