gr-sattools

dependencies

• gnuradio >=3.7.12
• zeromq

build

mkdir build/
cd build
cmake ../
make -j4
make install

usage

see examples/ directory

blocks

ASM+Golay Decoder

Decoder for ASM+Golay mode.

• Input: raw bitstream from the demodulator in unpacked bytes (1 bit/byte).

• Output: messages containing CSP packets, which can be fed to the CSP zmqhub PUB sink block.

This is a hierarchical block roughly equivalent to the following blocks.

Async CRC32-Castagnoli

Computes or checks CRC32-Castagnoli in async messages.

Golay24 Decoder

Block used for header decoding in ASM+Golay mode. Expects 24 unpacked bits in the input port, which then are decoded using extended binary Golay code.

• If decoding is successful, a message is sent with a dictionary containing all tags from the input and a frame_len pair containing the frame length in bits.
• If decoding fails, a PMT_F message is sent.

Reed-Solomon CCSDS Decoder

Decodes async messages using CCSDS Reed-Solomon variant (NO dual-basis representation).

CSP zmqhub PUB sink

Connects PDUs containing CSP packets to a zmqhub interface from libcsp.