Tail-biting turbo-code encoder and associated decoder
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United States of America Patent
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Mar 4, 2003
Grant Date -
N/A
app pub date -
Jun 1, 1999
filing date -
Jun 1, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of creating tail-biting recursive systematic convolutional and turbo codes, and the associated encoders, are described herein. According to the method, symbols from the set of data to be transmitted are used to preset the starting state of the encoder, and are replaced in a systematic set by an equivalent number of tail-biting symbols that force the ending state of the encoder to be the same as the starting state. The presetting of the starting state allows for simpler calculations in choosing the tail-biting symbols, and allows a message to be transmitted with a reduced number of symbols The reduction in the number of symbols used for overhead in this invention provides an increase in the data transmission rate.
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