The present invention is estimated to prevent an operation error caused by relates to a LPC coefficient extracting method using the Durbin algorithm in a mobile communication system, and more particularly to fixed-point arithmetic error accumulation when a fixed-point implementation of the Durbin algorithm for extracting LPC coefficients It relates to a LPC coefficient extracting method using the Durbin algorithm in a mobile communication system which corrects the value of the reflection coefficient, in accordance with the LPC coefficient extracting method using Durbin algorithm according to the present invention a mobile communication system according to the present invention, LPC coefficients extracted Therefore the by giving to correct the value of the reflection coefficient estimates in order to prevent an operational error caused by fixed-point arithmetic error accumulation when a fixed-point implementation of the Durbin algorithm, the exchange makes a system-wide overflow due to operation error of the reflection coefficient in advance, for because the performance of a mobile communication system There is an excellent effect that was ever improve.
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