Lab 8.6 - Channel coding BER comparison

Lab 8.6 - Channel coding BER comparison with interleaving

Goal

Compare BER performance for several link variants at the same SNR:

• uncoded baseline;
• convolutional code (hard Viterbi);
• sparse parity-check (LDPC-like) block code;
• with and without interleaving under bursty disturbances.

Executable file

File	Purpose
blocks/block_08_modulation_and_synchronization/python/lab_8_6_channel_coding_ber_comparison.py	BER curves across SNR points

Run from the repository root:

python blocks/block_08_modulation_and_synchronization/python/lab_8_6_channel_coding_ber_comparison.py

Generated artifacts

docs/assets/lab86_channel_coding_ber.png
docs/assets/lab86_channel_coding_metrics.json

What this lab demonstrates

1. Coding gain relative to uncoded transmission.
2. Impact of burst disturbances on hard-decision decoders.
3. Why interleaving helps under bursty, not purely memoryless, error processes.

Report checklist

• [ ] Include BER curves for all variants.
• [ ] Highlight SNR points where coding gain is most visible.
• [ ] Compare interleaved vs non-interleaved performance.
• [ ] Explain limits of compact LDPC-like and hard-decision decoding model.