Detection/Decoding Over Channels With Synchronization Errors and Inter-Symbol Interference

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Executive Summary

The authors consider coding schemes over an independent and identically distributed (i.i.d.) insertion/deletion channel with Inter-Symbol Interference (ISI). The idea is based on a serial concatenation of a Low-Density Parity Check (LDPC) code with a marker code. First, they design a Maximum-A-Posteriori (MAP) detector operating at the bit level which jointly achieves synchronization for the insertion/deletion channel (with the help of the marker code) and equalization for the ISI channel. Utilizing this MAP detector together with an LDPC code with powerful error-correction capabilities, they demonstrate that reliable transmission over this channel is feasible.

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