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The attractive high data rate communication systems over Power line channels are usually suffering from many kinds of interferences, among which the impulsive noise is the most critical. This paper presents an improved HomePlug 1.0 FEC (Forward Error Correction) stage, by keeping the same hardware architecture, but adding an extra processing in the two decoding blocs. In order to compensate impulsive noise effect on communication quality, especially burst errors presence, the authors propose to use the SOVA algorithm in the inner decoder and an erasure RS as an outer one. SOVA algorithm provides a reliability measure for each decoded bit, which helps to mark and locate erasures, useful for the next stage.
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