公开(公告)号：KR100974745B1

公开(公告)日：2010-08-06

申请号：KR1020080089896

申请日：2008-09-11

Applicant: 포항공과대학교 산학협력단

Inventor： 전경훈 ,  설창규 ,  사공민

IPC: H04L27/06 ,  H04B1/16

Abstract: 본 발명의 실시예에 따른 베셀 함수의 근사화 방법을 이용한 연산장치는 연산장치 내에서 0차 1종 변형 베셀 함수에 자연로그를 취한 함수를 계산하는 경우 상기 함수를 n차 다항식으로 근사화하여 계산하는 것을 특징으로 한다. 여기서, n차 다항식은 a
n x
n ＋…＋a
1 x
1 ＋a
0 이고, a
0
내지
a
n
은 실수이며,
n은 정수이다.
베셀 함수, 근사화, 자연로그, 다항식

公开(公告)号：KR1020100030920A

公开(公告)日：2010-03-19

申请号：KR1020080089896

申请日：2008-09-11

Applicant: 포항공과대학교 산학협력단

Inventor： 전경훈 ,  설창규 ,  사공민

IPC: H04L27/06 ,  H04B1/16

CPC classification number: H04L27/14 ,  H04L1/0047

Abstract: PURPOSE: A calculation apparatus is provided to reduce complexity of a decoding process by efficiently approximating a Bessel function. CONSTITUTION: A channel log likelihood ratio calculation unit calculates a channel log likelihood ratio from a signal about a received encoded data. A decoder(230) estimates the data by operating an iterative decoding for the calculated channel log likelihood ratio. A function taking natural logarithm of a 0-th order modified Bessel function of the first kind is approximated to n-th order polynomial. A matching filter(210) outputs the signal which is filtered by receiving a signal transmitted from data transfer equipment.

Abstract translation: 目的：提供一种计算装置，通过有效地近似贝塞尔函数来降低解码过程的复杂性。 构成：通道对数似然比计算单元从关于接收到的编码数据的信号计算通道对数似然比。 解码器（230）通过对所计算的信道对数似然比进行迭代解码来估计数据。 采用第一类的0阶修正贝塞尔函数的自然对数函数近似于n阶多项式。 匹配滤波器（210）通过接收从数据传送设备发送的信号来输出被滤波的信号。

公开(公告)号：KR100776910B1

公开(公告)日：2007-11-15

申请号：KR1020060087404

申请日：2006-09-11

Applicant: 포항공과대학교 산학협력단

Inventor： 전경훈 ,  사공민

IPC: H03M13/37

CPC classification number: H03M13/2975 ,  H03M13/2969 ,  H03M13/3753 ,  H03M13/3983 ,  H04L1/0051

Abstract: An iterative decoding device using SCR/SDR(Sign Change Ratio/Sign Difference Ratio) in a non-binary code and an operation method thereof are provided to regulate the number of iterative decoding times by utilizing SCR or SDR for extrinsic information for each symbol, extrinsic information of bits, and an approximate value of bit extrinsic information. In an iterative decoding device using SCR/SDR in a non-binary code, an iterative decoding execution unit(100) iteratively decodes the non-binary code received from a transmitter, by a unit of 2^n-ary n-tuple binary symbol by using extrinsic information generated from a first decoder(101), for a second decoder(102), and inputting soft output generated from the second decoder, to the first decoder again. An SCR/SDR calculating unit(110) calculates SCR/SDR indicating the change ratio of the code by using extrinsic information related to the 2^n-ary n-tuple binary symbol. An iterative decoding stop unit(120) stops an iterative decoding operation and finishes decoding if the computed SCR/SDR is over each critical value.

Abstract translation: 提供了使用非二进制码中的SCR / SDR（符号变化率/符号差分比）的迭代解码装置及其操作方法，以通过利用SCR或SDR为每个符号的外在信息来调节迭代解码次数， 比特的外部信息，以及比特外在信息的近似值。 在使用非二进制码中的SCR / SDR的迭代解码装置中，迭代解码执行单元（100）通过2 ^ n元n元组二进制符号的单位对从发送器接收的非二进制码进行迭代解码 通过使用从第一解码器（101）生成的外部信息，对于第二解码器（102），并且将从第二解码器产生的软输出再次输入到第一解码器。 SCR / SDR计算单元（110）通过使用与二进制n元组二进制符号相关的外在信息来计算指示代码的变化率的SCR / SDR。 迭代解码停止单元（120）停止迭代解码操作，并且如果所计算的SCR / SDR超过每个临界值，则完成解码。