DS Spread-Spectrum Modulator 10 Mchip/s
  • A higher-performance newer generation DSSS modulator is now available: COM-1519
  • Direct sequence spread-spectrum (DS-SS) Modulator
  • Programmable chip rates up to 10 Mchip/s
  • Spreading codes:
    • Gold sequences (up to 223-1 chips)
    • Maximal length sequences, (max length 223-1 chips)
    • Barker codes (length 11, 13)
  • Code modulation: BPSK/QPSK/OQPSK with output spectral shaping filter: raised cosine square root filter with 20%, 25%, or 40% rolloff
  • Internal generation of PRBS-11 pseudo-random bit stream and unmodulated carrier for test purposes
  • Built-in channel impairments generation:
    • additive white Gaussian noise
    • frequency offset (Doppler)
  • Connectorized 3”x 3” module for ease of prototyping. Standard 40 pin 2mm dual row connectors (left, right, bottom). Single 5V supply. Interfaces with 5V and 3.3V logic

    Input Output
    COM-1010 Convolutional encoder COM-1011/1018 DSSS Demodulator (back to back)
    COM-7002 Turbo Code Error correction encoder COM-2001 Digital-to-analog converter (baseband)
    COM-8001 Arbitrary waveform signal generator 256MB/1GB COM-4004 70 MHz IF modulator
      COM-1023 BER generator, AWGN generator
      COM-1024 Multipath simulator


    (308 KB)
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