公开(公告)号：KR1020020061414A

公开(公告)日：2002-07-24

申请号：KR1020010002470

申请日：2001-01-16

Applicant: 한국과학기술원

Inventor： 송익호 ,  김윤희 ,  권형문

IPC: H03M13/23

CPC classification number: H04L1/005 ,  H03M13/2957 ,  H03M13/31 ,  H03M13/3927 ,  H04B1/707 ,  H04L1/0041 ,  H04L1/0055 ,  H04L1/0066 ,  H04L1/0071 ,  H04L1/04 ,  H04L1/08 ,  H04L27/2649

Abstract: PURPOSE: A multi-carrier direction number sequence CDMA system using a turbo code on the basis of a nonuniform repetition code is provided to heighten a speech quality in a mobile communication environment when adopted for a base station and a terminal by giving more diversity degree to odd-even check symbol in coding and decoding a data bit. CONSTITUTION: A turbo coder(10) encodes a data bit, an input signal. A repeater/symbol corresponding unit(20) converts a turbo code symbol output after being coded from the turbo coder(10) into a repetition code symbol in a frequency domain and suitably separates the converted repetition code symbol signal. Insertions(30,31,32) change a channel for the turbo code symbol output from the repeater/symbol corresponding unit so that an influence in case of a severe attenuation can be suitably distributed to symbols of a codeword. The first multipliers(40,41,l42) multiply the turbo code symbols which have been suitably out of order by a signature number sequence, and make a spread spectrum. Impact modulator(50,51,52) modulate the spectrum-spread signal to an impulse form. Chip wave shaping filters(60,61,62) converts a waveform of a signal output from the impact modulator smoothly and cancels interference between symbols. Second multipliers assign the signal output from the chip wave shaping filter into each frequency band. The first adder(80) adds all signals output from the second multipliers and transmits it.

Abstract translation: 目的：提供一种基于不均匀重复码的turbo码的多载波方向序列CDMA系统，用于通过向基站和终端提供更多的分集度来提高移动通信环境中的语音质量 奇数校验符号对数据位进行编码和解码。 构成：turbo编码器（10）对数据位，输入信号进行编码。 中继器/符号对应单元（20）将从turbo编码器（10）编码后的turbo码符号输出转换为频域中的重复码元，并适当地分离转换的重复码符号信号。 插入（30,31,32）改变从中继器/符号对应单元输出的turbo码符号的信道，使得在严重衰减的情况下的影响可以适当地分布到码字的符号。 第一乘法器（40,41,142）将已经被合理地按顺序排列的turbo码符号乘以签名号码序列，并进行扩频。 冲击调制器（50,51,52）将频谱扩展信号调制为脉冲形式。 芯片波形整形滤波器（60,61,62）平滑地转换从冲击调制器输出的信号的波形，并消除符号之间的干扰。 第二乘法器将来自芯片波形整形滤波器的信号分配给每个频带。 第一加法器（80）将从第二乘法器输出的所有信号相加并发送。

公开(公告)号：KR1020080090104A

公开(公告)日：2008-10-08

申请号：KR1020070033190

申请日：2007-04-04

Applicant: 한국과학기술원

Inventor： 송익호 ,  권형문 ,  박주호

IPC: H04B7/02 ,  H04B7/005

CPC classification number: H04B7/0848 ,  H04B1/7075 ,  H04L7/042

Abstract: An apparatus and a method for adaptive code acquisition are provided to improve the performance of a code acquisition system and obtain theories suitable to design the system actually. Adaptive code acquisition is performed by applying a detection method, which uses a cell average constant false alarm rate scheme, to signals received from a plurality of antennas, in a non-homogeneous fading circumstance. The cell average constant false alarm rate scheme uses a detection rate expressed by the following equation; PD=ICA(SP)(1-ICA(0P))^(M-1). The cell average constant false alarm rate scheme uses a false alarm rate expressed by the following equations; PFA=1/LPx(ICA(0P)(1-ICA(SP))(1-ICA(0P))^(M-2))+((LP-1)/LP)x(ICA(0P)(1-ICA(0P))^(M-1)).

Abstract translation: 提供一种用于自适应代码获取的装置和方法，以改进代码采集系统的性能，并获得适合实际设计系统的理论。 通过在非均匀衰落情况下对从多个天线接收到的信号应用使用小区平均恒定误报率方案的检测方法来执行自适应代码获取。 细胞平均常数误报率方案使用由下式表示的检测率; PD = ICA（SP）（1-ICA（0P））^（M-1）。 小区平均常数误报率方案采用下列等式表示的虚警率; PFA = 1 / LPX（ICA（0P）（1-ICA（SP））（1-ICA（0P））^（M-2））+（（LP-1）/ LP）×（ICA（0P）（ 1-ICA（0P））^（M-1））。

公开(公告)号：KR1020080019337A

公开(公告)日：2008-03-04

申请号：KR1020060081483

申请日：2006-08-28

Applicant: 한국과학기술원

Inventor： 송익호 ,  권형문 ,  강현구

IPC: H04L1/02 ,  H04B7/02 ,  H04B7/04

CPC classification number: H04L1/02 ,  H04B1/7075 ,  H04B7/08

Abstract: An adaptive code acquisition method using a receiver diversity and a CFAR(Constant False Alarm Rate) scheme is provided to acquire and estimates a performance characteristic of a CFAR processor having a cell average, a GO(Greatest Of) value, and SO(Smallest Of) value in a homogeneous noise environment when acquiring a pseudo-noise code. An adaptive code acquisition method using reception diversity and a CFAR scheme performs detection by applying a signal received from a plurality of receiving antenna. The CFAR scheme is shown as below. PD=IH,CA(alpha){1-IH,CA(0)}M-1, PFA=1/Lp[IH,CA(0){1-IH,CA(alpha)}{1-IH,CA(0)}M-2] + (Lp-1)/Lp[IH,CA(0){1-IH,CA(0)}M-1]. The average CFAR scheme uses an approximated value of the CFAR which is shown as an equation as below. PFA≒IH,CA(0){1-IH,CA(0)}M-1].

Abstract translation: 提供了一种使用接收机分集和CFAR（常数假警报率）方案的自适应代码获取方法，用于获取和估计具有单元平均值，GO（最大值）值和SO（最小值）的CFAR处理器的性能特性 ）值在获取伪噪声码时在均匀噪声环境中。 使用接收分集和CFAR方案的自适应码获取方法通过应用从多个接收天线接收的信号来执行检测。 CFAR方案如下所示。 PD = 1H，CA（α）{1-IH，CA（0）} M-1，PFA = 1 / Lp [IH，CA（0）{1-IH，CA（α）} {1-IH， （0）} M-2] +（Lp-1）/ Lp [1H，CA（0）{1-IH，CA（0）} M-1]。 平均CFAR方案使用CFAR的近似值，如下面的等式所示。 PFA≒1H，CA（0）{1-IH，CA（0）} M-1]。

公开(公告)号：KR1020060010670A

公开(公告)日：2006-02-02

申请号：KR1020040059450

申请日：2004-07-28

Applicant: 한국과학기술원

Inventor： 권형문 ,  송익호

IPC: H04B1/7077 ,  H04B1/7085

CPC classification number: H04B1/7077 ,  H04B1/7085 ,  H04B1/7097 ,  H04B2001/70706

Abstract: 이 발명은 직접수열 대역확산 (direct sequence spread spectrum) 시스템에 알맞은 비동위상 순차 부호획득 기법에 관한 것이다.
본 발명에서는 어림값을 바탕으로 감쇄가 있거나 없는 채널에 쓸 수 있는 간단한 최대 비슷함 비율을 만들어 실시간으로 구현이 가능하고 그 성능이 비슷한 부호획득 방법을 제공한다.
직접수열 대역확산, 의사잡음 수열, 순차 부호획득, 어림 최대 비슷함 비율

公开(公告)号：KR100620889B1

公开(公告)日：2006-09-19

申请号：KR1020040059450

申请日：2004-07-28

Applicant: 한국과학기술원

Inventor： 권형문 ,  송익호

IPC: H04B1/7077 ,  H04B1/7085

Abstract: 이 발명은 직접수열 대역확산 (direct sequence spread spectrum) 시스템에 알맞은 비동위상 순차 부호획득 기법에 관한 것이다.
본 발명에서는 어림값을 바탕으로 감쇄가 있거나 없는 채널에 쓸 수 있는 간단한 최대 비슷함 비율을 만들어 실시간으로 구현이 가능하고 그 성능이 비슷한 부호획득 방법을 제공한다.
직접수열 대역확산, 의사잡음 수열, 순차 부호획득, 어림 최대 비슷함 비율

公开(公告)号：KR100361033B1

公开(公告)日：2003-01-24

申请号：KR1020010002470

申请日：2001-01-16

Applicant: 한국과학기술원

Inventor： 송익호 ,  김윤희 ,  권형문

IPC: H03M13/23

CPC classification number: H04L1/005 ,  H03M13/2957 ,  H03M13/31 ,  H03M13/3927 ,  H04B1/707 ,  H04L1/0041 ,  H04L1/0055 ,  H04L1/0066 ,  H04L1/0071 ,  H04L1/04 ,  H04L1/08 ,  H04L27/2649

Abstract: The present invention relates to a multicarrier direct sequence code division multiple access (DS/CDMA) system using a turbo code with nonuniform repetition coding. In particular, it relates to a multicarrier DS/CDMA system using a turbo code with unequal diversity order in its code symbols instead of using a convolutional code.

Abstract translation: 本发明涉及使用具有非均匀重复编码的turbo码的多载波直接序列码分多址（DS / CDMA）系统。 具体地说，它涉及一种多载波DS / CDMA系统，它使用代码符号中不等分集顺序的turbo码，而不是使用卷积码。