DSSS Demodulator 20 Mchip/s

KEY FEATURES

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

ComBlock COMPATIBILITY LIST

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