公开(公告)号：KR100945532B1

公开(公告)日：2010-03-09

申请号：KR20080099497

申请日：2008-10-10

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM PAN SOO ,  CHANG DAE IG ,  LEE HO JIN ,  KIM JIN YOUNG ,  PARK JAE SUNG ,  LIM YOUNG SUN

IPC: H04L27/22 ,  H04L1/00

CPC classification number: H04L27/22 ,  H04L1/0047 ,  H04L1/005 ,  H04L1/0066 ,  H04L2027/0067

Abstract: PURPOSE: An apparatus and a method for estimating phase error using a variable step size are provided to improve remarkably the astriction-speed and the accuracy of the estimation by forming an outside single estimator using the LMS(Least Mean Square) algorithm having the variable step size. CONSTITUTION: An APP mean value production unit(61) produces a posterior probability mean value from the soft-decision result for the current receiving symbol. A step size determination unit(62) determines variably the step size according to the channel condition. A phase error estimated unit(63) estimates the phase error of the current receiving symbol from the phase error and the posterior probability mean value of the previous receiving symbol using the step size which was variably determined. The soft-decision result is the soft decision output information which is generated in the decoding procedure of a turbo decoder.

Abstract translation: 目的：提供一种用于使用可变步长来估计相位误差的装置和方法，以通过使用具有可变步长的LMS（最小均方）算法形成外部单个估计器来显着地改善估计的收缩速度和精度 尺寸。 构成：APP平均值生产单元（61）根据当前接收符号的软判决结果产生后验概率平均值。 步长确定单元（62）根据信道条件可变地确定步长。 相位误差估计单元（63）使用可变确定的步长从相位误差和先前接收符号的后验概率平均值估计当前接收符号的相位误差。 软判决结果是在turbo解码器的解码过程中产生的软决策输出信息。