On the Synthesis of Channel Codes for NAND flash devices in Space Application

Abstract

NAND flash memory technology is an important component that is vital in enabling data storage and processing capabilities for deep space missions. Thus, it plays an important role in contributing to the success and scientific outcomes of exploration endeavors beyond Earth's orbit. Its non-volatile characteristic guarantees data integrity even when power is unavailable, a critical attribute for extended missions where power resources are constrained. To improve the data integrity in NAND flash devices used in space applications, appropriate channel codes have to be incorporated. In this work, we have synthesized channel codes for two different NAND flash memory architectures used in space applications. The designed codes provide improved bit error rates when compared with the state-of-the-art. By incorporating suitably designed Subfield Subcodes of Reed Solomon (SSRS) codes in flash memory devices, the device is able to return stored data at acceptable bit error rates even when the raw bit error rate is as high as 10-3 © 2024 IEEE.