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Design and Implementation of Digital IF Telemetry Receiver

Aiming at the application environment of telemetry signal reception in flight test, a digital IF telemetry receiver is designed in this paper. ZYNQ solution is adopted to form an independent control center, which greatly reduces the coupling degree and improves the flexibility of the system. This paper studies the architecture of digital IF telemetry receiver, and introduces the demodulation algorithms of PCM-FM and SOQPSK. An implementation scheme of digital IF telemetry receiver is given, simulated and analyzed, the principle prototype is developed, and the flight test is carried out. The test results show that the digital IF receiver has strong adaptability, can adapt to larger bandwidth and meet a variety of telemetry waveform systems. When the waveform is PCM-FM and the bitrate is 20Mbps, the sensitivity can reach −84dBm; When the waveform is SOQPSK and the bit rate is 20Mbps, the sensitivity can reach −84.7dBm. The development of the system provides technical support for mass data telemetry and high-speed data transmission of military type flight test, and has a wide application prospect.