TELCOR High Data Rate HF Modem and Vocoder

The TELCOR Modem Family TMV is a multifunctional modem for fast, serial data transmission in short wave radio communication systems.
In its basic configuration, it already supports multiple waveforms;
complementary further waveforms may be loaded onto the HF Modem if required.

The TELCOR HF modem also employs a complex forward error correction (FEC) procedure in accordance with the relevant standards
in order to provide transmission with minimum error rates.

Features

Serial single-tone mode in accordance with MIL-STD-188-110A/B and STANAG 4539

  • Communication mode: Duplex, half-duplex or simplex
  • User data rate (without compression): 75 / 150 / 300 / 1,200 / 2,400 / 3,200 / 4,800 / 6,400 / 8,000 / 9,600 / 12,800 bit/s
  • User data rate (with external compression): Up to 115 kbit/s
  • FEC coding: Convolutional coding, soft decision
  • Interleaving: 0 - 8.64 s
  • Modulation: 2 / 4 / 8 PSK, 16 / 32 / 64 QAM
  • Carrier frequency: 1,800 Hz
  • Multipath tolerance: Up to 6 ms
  • Bandwidth:

    • -3 dB: max. 2.4 kHz (0.6 ... 3.0 kHz)
    • -25 dB: max. 3.0 kHz (0.3 ... 3.3 kHz)

  • Doppler sync:. ± 75 Hz initial value; up to 3.5 Hz/s tracking
  • Demodulation: Coherent, decision feedback equalizer with turbo equalization
  • Notch filter: Multiple adaptive