SDRP GNU Rx

A GNU Radio-based BPSK receiver and PDU decoder system. This project handles symbol reception, ASM detection, PDU generation, and higher-layer decoding including Viterbi, FEC, and decryption.

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Requirements

• GNU Radio Companion (tested with v3.10.1.1)
• Python 3.x
• Required Python packages: see requirements.txt
• C++ compiler for FEC module

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Setup

1. Install GNU Radio Companion and all dependencies.
2. Build FEC module:

cd fec
make all

This generates the bbfec.so objects needed by the decoder.

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Usage

1. Run the BPSK Receiver This script syncs, detects the ASM, collects symbols, and packages them into PDUs. You can specify the RX source with the --source option:

# Use Pluto as the receiver (default)
python3 sdrp_bpsk_receiver.py --source pluto

# Use USRP as the receiver
python3 sdrp_bpsk_receiver.py --source usrp

2. Run the PDU Decoder (UDP Server) This script receives PDUs via UDP and applies decoding (Viterbi, FEC, decryption):

python3 sdrp_pdu_decoder.py

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Notes

• Ensure the receiver is running before the decoder server.
• Tested on GNU Radio v3.10.1.1 and Python 3.10.
• For modifications to FEC, rebuild using make all in the fec folder.

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