LDPC Code

5G NR Data Channel Coding

Real-World Applications

5G NR data channel main coding, WiFi 6 (802.11ax), SSD controllers, 10 Gigabit Ethernet (10GBASE-T). LDPC has extremely high decoding efficiency at high throughput, the king of today high-performance coding.

Experiment Steps

Sparse Matrix: Matrix is mostly zeros
Iterative Decoding: Belief Propagation algorithm

Simulation Experiment

LDPC Code Tanner Graph Demo

Code Length: 10 bitsCheck Nodes: 5Iterations: 0 / 5Eb/N0: 1.0 dBChannel Error Rate: 5.6%Current Errors: 0 bits

LDPC Tanner Graph & Bit-Flipping Decoding

✓ All checks passed! Decoding successful

Green = correct (0), Red = error (1). Click variable nodes to flip manually.

Bit-Flipping Algorithm: If majority of a variable node's connected check nodes fail, flip that bit. Iterate until all checks pass.

Parameters(Real-time)

Code Length10 bit

Iterations5

Eb/N01 dB

← Turbo Code

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