Home >   Product List > COM-1018    DIRECT SEQUENCE SPREAD-SPECTRUM
                            DEMODULATOR   20 Mchip/s  

Key Features

• 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 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 with 3.3V LVTTL logic.

 

Compatibility List

Input

Output

COM-1012/1019  DS Spread-Spectrum Modulator (back to back)	COM-1005 Bit Error Rate Measurement
COM-300x RF receivers	COM-7001 Turbo Code Error Correction
COM-1008 Variable decimation	COM-1009 Convolutional Decoder, K=7, 5
COM-1023 BER generator, AWGN generator	COM-8003 Signal Diversity Combiner
COM-1024 Multipath simulator	COM-5003 TCP-IP / USB Gateway

 

Price and Availability     

 

ComBlock Specifications 315 KB

 

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VHDL Source Code / IP Overview 202 KB

 

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