Somehow this reminds me of Polar codes (used in the 5G control protocol), the first code to provably approach the Shannon limit (iiuc). It works by turning a ph

Somehow this reminds me of Polar codes (used in the 5G control protocol), the first code to provably approach the Shannon limit (iiuc). It works by turning a physical channel into N virtual channels, and it uses the polar coding algorithm to increase the noisiness of some virtual channels, while decreasing the noisiness of others. So you need to pick which virtual channels to listen to, depending on the noisiness characteristics of the environment. And it kind of uses a simple recursive strategy to generate these codes as a simple mixture of inputs. If I understand correctly, this approach is kind of using a recursive checksum-like system to use local bits to verify the integrity of the code globally?