Home >   Product List > COM-1019    DSSS MODULATOR   20 Mchip/s  

Key Features

• Direct sequence spread-spectrum (DS-SS) modulator.
• Programmable chip rates up to 20 Mchip/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.
• code modulation: BPSK/QPSK/OQPSK with output spectral shaping filter: raised cosine square root filter with 20%, 25%, 35% or 40% rolloff. Filter can be bypassed.
• Internal generation of 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). Single 5V supply with reverse voltage and overvoltage protection. Interfaces with 3.3V LVTTL logic.

 

 

Compatibility List

Input	Output
COM-1010 Convolutional encoder	COM-2001 Digital to Analog conversion, baseband
COM-7001 Turbo code encoder	COM-4004 70 MHz IF modulator
COM-8001 Pattern generator 256MB/1GB COM-8004 Signal Diversity Splitter	COM-1012/1018 Direct sequence spread-spectrum demodulator. digital back-to-back
COM-5003 TCP-IP / USB Gateway	COM-1023 BER generator, white gaussian noise generator
	COM-1024 Multipath simulator.

 

Price and Availability     

 

ComBlock Specifications 353 KB

 

Purchase ComBlock 

 

VHDL Source Code / IP Overview 79 KB

 

Purchase VHDL source / IP 

 

Any suggestion for new/future ComBlocks?  Please let us know