Method and device for measuring the current signal-to-noise ratio when decoding LDPC codes
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United States of America Patent
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Oct 17, 2017
Grant Date -
Feb 9, 2017
app pub date -
Oct 18, 2016
filing date -
Oct 28, 2013
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Abstract
A method for measuring a signal-to-noise ratio when decoding Low Density Parity Check (LDPC) codes is provided. The method includes receiving from an input of a demodulator an input code word with “strong” or “weak” solutions, decoding the input code word in a LDPC decoder using a predetermined dependence of a mean number of iterations on the signal-to-noise ratio, recording a number of iterations performed during the decoding of the input code word, averaging derived values of the number of iterations for a specified time interval, estimating a signal-to-noise ratio based on averaged derived values of the number of iterations and based on the predetermined dependence of the mean number of iterations on the signal-to-noise ratio, and generating an output decoded code word.
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