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Wireless & Mobility · Advanced

Low-Density Parity-Check (LDPC)

A high-performance error-correcting code optional in 802.11n/ac and required for most 802.11ax/be rates.

Definition

LDPC provides about 1 to 2 dB of coding gain over binary convolutional coding. It is mandatory for wider channels and higher MCS values in 802.11ax and 802.11be. 5G NR uses LDPC for data channels.

Exam tip

LDPC improves effective SNR; it does not increase raw modulation.

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