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Stable DFT codes and frames
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DOI：10.1109/LSP.2002.807876.png)
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Abstract
En 中文
Discrete Fourier transform codes (DFT codes) 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 letter 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.
Keywords:
concatenated codes
condition number
eigen-values
error control coding
frame bounds
frames
interpolation
numerical stability
real codes
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