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。

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。