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Title Stable DFT Codes and Frames
Author Paulo J S G Ferreira, José M. N. Vieira
Journal IEEE Signal Processing Letters
Volume 10
Number 2
Pages 50-53
Month February
Year 2003
DOI [1]
Group (before 2015) Signal Processing Laboratory
Indexed by ISI Yes


DFT or real number codes have been studied and recognized as useful (as joint source-channel codes, for example) but are not stable under bursty losses. This paper introduces a two-channel DFT code with an interleaver, and shows that its numerical stability far exceeds that of the corresponding single-channel DFT code (the ratio of the frame bounds for the two-channel system can be smaller by many orders of magnitude). This leads to a stable way of dealing with bursts of errors using DFT codes.