Pulse or digital communications – Systems using alternating or pulsating current
Patent
1998-10-29
2000-01-11
Ghebretinsae, Temesghen
Pulse or digital communications
Systems using alternating or pulsating current
714755, 714786, H04L 2700, H03M 1312
Patent
active
060144114
ABSTRACT:
The turbo encoding process repeats the bits of the systematic data and appends the flushing tail bits prior to interleaving and encoding by the second constituent turbo encoder for providing an interleaved repetitive second encoded output for turbo decoding as a repetitive turbo code method to reduce the error floor of turbo coding. Preferably, the repetitive systematic string is also encoded by the first encoder and is transmitted providing repetitive transmitted first encoded sequence and a repetitive transmitted systematic sequence from the turbo encoder. The turbo decoder operates on three repetitive sequences and perform bit deletion among r repetitive systematic bits after conventional turbo decoding. The repetitive sequences may also be subjected to encoder puncturing and decoder bit insertion as an alternative enhancement.
REFERENCES:
patent: 5721745 (1998-02-01), Hladik et al.
Ghebretinsae Temesghen
Reid Derrick Michael
The Aerospace Corporation
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