DSSS Demodulator 20 Mchip/s
  • A higher-performance newer-generation DSSS demodulator is now available: COM-1518
  • Direct sequence spread-spectrum demodulator
  • Variable chip rate up to 20 Mchips/s
  • Spreading codes:
    • Gold sequences (up to 223-1 chips)
    • Maximal length sequences, (max length 223-1 chips)
    • Barker codes (length 11, 13)
    • GPS C/A codes
  • BPSK, QPSK selectable
  • Demodulation performances: within 1.5 dB from theory at threshold SNR of 5 dB
  • Sequential code search
  • 4-bit soft-quantized demodulated bits
  • Monitoring:
    • Receiver lock
    • Carrier frequency error
    ComScope–enabled: key internal signals can be captured in real-time and displayed on a host computer
  • Connectorized 3”x 3” module for ease of prototyping. Standard 40 pin 2mm dual row connectors (left, right). Single 5V Supply with reverse voltage and overvoltage protection. Interfaces 3.3V LVTTL logic

    Input Output
    COM-1519 DS Spread-Spectrum Modulator (back to back) COM-1005 Bit Error Rate Measurement
    COM-300x RF receivers COM-7002 Turbo Code Error Correction
    COM-1008 Variable decimation COM-1509 Convolutional Decoder, K=5,7,9
    COM-1824 Channel emulator (Doppler, delay, fading, noise) COM-8003 Signal Diversity Combiner
    COM-5003 TCP-IP / USB Gateway


    (315 KB)
    VHDL Source Code / IP Overview
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