Mobility

An Efficient Code Update Scheme for DSP Applications in Mobile Embedded Systems

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Executive Summary

DSP processors usually provide dedicated Address Generation Units (AGUs) to assist address computation. By carefully allocating variables in the memory, DSP compilers take advantage of AGUs and generate efficient code with compact size and improved performance. However, DSP applications running on mobile embedded systems often need to be updated after their initial releases. Studies showed that small changes at the source code level may significantly change the variable layout in the memory and thus the binary code, which causes large energy overheads to mobile embedded systems that patch through wireless or satellite communication, and often pecuniary burden to the users.

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