Table 2 LDPC decoding latency and error-correction performance for Rcode = 0.02 multi-edge codes on a single NVIDIA GeForce GTX 1080 GPU
From: Quasi-cyclic multi-edge LDPC codes for long-distance quantum cryptography
LDPC code | Random multi-edge | q = 21 QC multi-edge | q = 50 QC multi-edge |
|---|---|---|---|
Block length (Bits) | 1 × 106 | 1.008 × 106 | 1 × 106 |
Code rate | 0.02 | 0.02 | 0.01995 |
Connections in parity matrix | 3,337,494 | 160,185 | 66,747 |
Total latency per iteration (ms) | 3.528 | 1.296 | 1.177 |
FER performance and decoding throughput at β = 0.99 and d = 8 | |||
Max iterations | 500 | 500 | 500 |
Average iterations | 470 | 451 | 470 |
FER | 0.883 | 0.792 | 0.883 |
\(K_{{\mathrm{GPU}}}^{{\mathrm{raw}}}\) raw throughput (Mb/s) | 0.603 | 1.724 | 1.807 |
\(K_{{\mathrm{GPU}}}^\prime\) information throughput (kb/s) | 1.409 | 7.16 | 4.207 |
