Polar Coding for Oversampling Drift Channel

Oversampling could be effective technique to reduce error probability in timing-drift channel, wherein synchronization errors occur at a granularity finer than one bit. Also the oversampling will be feasible in some new storage devices with relatively slow media speed, such as DNA storage with nanopore sequencing. This paper defines timing-drift channel with oversampling, namely oversampling drift channel (OsDC), and presents error correction by polar code with a successive cancellation decoding adapted to the OsDC. Computer simulation shows estimation of symmetric capacity of polar bit channel, and also shows that the code rate can be improved by increasing the oversampling factor.