Time-varying variable-length error-correcting codes
V Buttigieg, JA Briffa - … Symposium on Information Theory and Its …, 2018 - ieeexplore.ieee.org
2018 International Symposium on Information Theory and Its …, 2018•ieeexplore.ieee.org
Time-Varying Variable-Length Error-Correcting (TV-VLEC) codes for joint source-channel
coding are introduced. These are codes that use different codebooks according to the
symbol position. A sequence MAP decoder for TV-VLEC codes is also derived. It is shown
that these codes can maintain a better symbol-level synchronization when compared to
standard VLEC codes. A new symbol-constrained free distance measure is also introduced
that enables the construction of TV-VLEC codes that outperform standard VLEC codes for …
coding are introduced. These are codes that use different codebooks according to the
symbol position. A sequence MAP decoder for TV-VLEC codes is also derived. It is shown
that these codes can maintain a better symbol-level synchronization when compared to
standard VLEC codes. A new symbol-constrained free distance measure is also introduced
that enables the construction of TV-VLEC codes that outperform standard VLEC codes for …
Time-Varying Variable-Length Error-Correcting (TV-VLEC) codes for joint source-channel coding are introduced. These are codes that use different codebooks according to the symbol position. A sequence MAP decoder for TV-VLEC codes is also derived. It is shown that these codes can maintain a better symbol-level synchronization when compared to standard VLEC codes. A new symbol-constrained free distance measure is also introduced that enables the construction of TV-VLEC codes that outperform standard VLEC codes for the same average codeword length and decoder complexity. Using Monte Carlo simulation it is shown that for a simple 4-symbol code a coding gain of 2dB can be achieved at a frame error rate of 10 -3 .
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