Method for decoding a polar code with inversion of unreliable bits
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United States of America Patent
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Aug 11, 2020
Grant Date -
May 2, 2019
app pub date -
Apr 12, 2017
filing date -
Apr 15, 2016
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Abstract
A polar code decoding method in which a first decoding attempt by successive cancellation is performed and in the case where the decoded frame is erroneous, an ordered list of bit positions to be tested in the frame is generated, the order relation being given by a metric of first error, the value of this metric depending on the reliability of the decision about the bit as well as on the reliability of the decisions about the bits preceding it in the frame. For each of the positions of the list, an inversion of the bit and a decoding of the subsequent bits are undertaken, doing so as long as the list has not been exhausted or the frame has not been decoded without error. In case of failure, a new decoding attempt based on a double-inversion of bits can be envisaged.
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