History
Impractical to implement when first developed by Gallager in 1963, Gallager's LDPC codes were forgotten until Gallager's work was discovered in 1996. Turbo codes, another class of capacity-approaching codes discovered in 1993, became the coding scheme of choice in the late 1990s, used for applications such as deep space satellite communications. However, in the last few years, the advances in low-density parity-check codes have seen them surpass turbo codes in terms of error floor and performance in the higher code rate range, leaving turbo codes better suited for the lower code rates only.
Read more about this topic: Low-density Parity-check Code
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