公开(公告)号：EP2137872A4

公开(公告)日：2010-03-03

申请号：EP08778879

申请日：2008-07-18

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHANG KAP SEOK ,  KIM IL GYU ,  PARK HYEONG GEUN ,  KO YOUNG JO ,  YI HYO SEOK ,  JEONG CHAN BOK ,  KIM YOUNG HOON ,  BANG SEUNG CHAN

IPC: H04L7/04 ,  H04B1/707 ,  H04J13/00 ,  H04J13/10 ,  H04L7/02 ,  H04L27/26

CPC classification number: H04W48/16 ,  H04B1/70735 ,  H04B7/2656 ,  H04J11/0069 ,  H04L7/043 ,  H04L27/2613 ,  H04L27/2655 ,  H04W56/00 ,  H04W72/042 ,  H04W72/0446 ,  H04W88/08

Abstract: The present invention proposes a method of generating a downlink frame including a primary synchronization signal and secondary synchronization signals with which interference between sectors can be reduced so as to improve the performance for searching cells. The method comprises the steps of generating a first short sequence and a second short sequence, generating a first scrambling sequence and a second scrambling sequence by the primary synchronization signal, generating a third scrambling sequence determined by a short sequence group to which the first short sequence is assigned and a fourth scrambling sequence determined by a short sequence group to which the second short sequence is assigned, scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence, scrambling the second short sequence with the first scrambling sequence and scrambling the first short sequence with the second scrambling sequence and the fourth scrambling sequence, and mapping the secondary synchronization signal that including the scambled short sequences and the fourth to a frequency domain.

公开(公告)号：EP2127189A4

公开(公告)日：2010-03-17

申请号：EP08778878

申请日：2008-07-18

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHANG KAP SEOK ,  KIM IL GYU ,  PARK HYEONG GEUN ,  KO YOUNG JO ,  YI HYO SEOK ,  JEONG CHAN BOK ,  KIM YOUNG HOON ,  BANG SEUNG CHAN

IPC: H04L7/04 ,  H04B1/707 ,  H04J13/00 ,  H04J13/10 ,  H04L7/02 ,  H04L27/26

CPC classification number: H04W48/16 ,  H04B1/70735 ,  H04B7/2656 ,  H04J11/0069 ,  H04L7/043 ,  H04L27/2613 ,  H04L27/2655 ,  H04W56/00 ,  H04W72/042 ,  H04W72/0446 ,  H04W88/08

Abstract: The present invention proposes a method of generating a downlink frame including a primary synchronization signal and secondary synchronization signals with which interference between sectors can be reduced so as to improve the performance for searching cells. The method comprises the steps of generating a first short sequence and a second short sequence, generating a first scrambling sequence and a second scrambling sequence by the primary synchronization signal, generating a third scrambling sequence determined by a short sequence group to which the first short sequence is assigned and a fourth scrambling sequence determined by a short sequence group to which the second short sequence is assigned, scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence, scrambling the second short sequence with the first scrambling sequence and scrambling the first short sequence with the second scrambling sequence and the fourth scrambling sequence, and mapping the secondary synchronization signal that including the scambled short sequences and the fourth to a frequency domain.

公开(公告)号：EP2127188A4

公开(公告)日：2010-03-17

申请号：EP08778876

申请日：2008-07-18

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHANG KAP SEOK ,  KIM IL GYU ,  PARK HYEONG GEUN ,  KO YOUNG JO ,  YI HYO SEOK ,  JEONG CHAN BOK ,  KIM YOUNG HOON ,  BANG SEUNG CHAN

IPC: H04L7/04 ,  H04B1/707 ,  H04J13/00 ,  H04J13/10 ,  H04L7/02 ,  H04L27/26

CPC classification number: H04W48/16 ,  H04B1/70735 ,  H04B7/2656 ,  H04J11/0069 ,  H04L7/043 ,  H04L27/2613 ,  H04L27/2655 ,  H04W56/00 ,  H04W72/042 ,  H04W72/0446 ,  H04W88/08

Abstract: The present invention proposes a method of generating a downlink frame including a primary synchronization signal and secondary synchronization signals with which interference between sectors can be reduced so as to improve the performance for searching cells. The method comprises the steps of generating a first short sequence and a second short sequence, generating a first scrambling sequence and a second scrambling sequence by the primary synchronization signal, generating a third scrambling sequence determined by a short sequence group to which the first short sequence is assigned and a fourth scrambling sequence determined by a short sequence group to which the second short sequence is assigned, scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence, scrambling the second short sequence with the first scrambling sequence and scrambling the first short sequence with the second scrambling sequence and the fourth scrambling sequence, and mapping the secondary synchronization signal that including the scambled short sequences and the fourth to a frequency domain.

公开(公告)号：KR20070099483A

公开(公告)日：2007-10-09

申请号：KR20070032903

申请日：2007-04-03

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM IL GYU ,  PARK HYEONG GEUN ,  CHANG KAP SEOK ,  KO YOUNG JO ,  YI HYO SEOK ,  KIM YOUNG HOON ,  BANG SEUNG CHAN ,  HWANG SEUNG KU

IPC: H04L27/26 ,  H04B7/26 ,  H04J11/00 ,  H04L7/10

CPC classification number: H04J11/0073 ,  H04J11/0076 ,  H04L5/0016 ,  H04L5/0078 ,  H04L27/2657 ,  H04W48/16

Abstract: A cell searching method in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system, a frame transmitting method, and a frame transmitter are provided to reduce a cell searching time in a mobile terminal by simplifying a cell searching device. A forward link frame has duration of 10ms and includes 20 sub-frames(110). Each of the sub-frames has a duration of 0.5ms and includes 7 OFDM symbols(120). A primary synchronous channel OFDM symbol(100-A) and a secondary synchronous channel OFDM symbol(101-A) are included in every ten sub-frames. Two first and second synchronous channel OFDM symbols are included in one frame. A repetition period(130) of the synchronous channel symbols is equal to a sum of lengths of ten sub-frames. When first and second synchronous channels are coupled with each other according to a TDM(Time Division Multiplexing) scheme, the first and second synchronous channels are arranged to be adjacent to each other, such that a channel estimation value of the first synchronous channel is used, while the second synchronous channel is coherently demodulated.

Abstract translation: 提供OFDM（正交频分复用）蜂窝系统，帧发送方法和帧发送机中的小区搜索方法，通过简化小区搜索装置来减少移动终端中的小区搜索时间。 前向链路帧具有10ms的持续时间并且包括20个子帧（110）。 每个子帧具有0.5ms的持续时间并且包括7个OFDM符号（120）。 在每十个子帧中包括主同步信道OFDM符号（100-A）和辅同步信道OFDM符号（101-A）。 一个帧中包括两个第一和第二同步信道OFDM符号。 同步信道符号的重复周期（130）等于十个子帧的长度之和。 当根据TDM（时分复用）方案将第一和第二同步信道彼此耦合时，第一和第二同步信道被布置为彼此相邻，使得使用第一同步信道的信道估计值 而第二同步信道被相干解调。

公开(公告)号：KR20070099477A

公开(公告)日：2007-10-09

申请号：KR20070032811

申请日：2007-04-03

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM IL GYU ,  PARK HYEONG GEUN ,  CHANG KAP SEOK ,  KO YOUNG JO ,  YI HYO SEOK ,  KIM YOUNG HOON ,  BANG SEUNG CHAN ,  KIM NAM IL

IPC: H04L27/26 ,  H04B7/26 ,  H04J11/00

CPC classification number: H04J11/0069 ,  H04B7/2621

Abstract: A cell searching method in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system, a frame transmitting method, and a frame transmitter are provided to reduce a cell searching time in the OFDM cellular system by reducing a configuration complexity of a cell searching unit. A synchronization detector(622) includes correlation calculators(701-A,701-B), a signal coupler(702), an accumulation unit(703), and a timing detector(710). Outputs from the correlation calculators are accumulated in the accumulation unit through the signal coupler. The correlation calculator generates 4800 units in respective synchronization blocks. The timing detector detects a position of a sample having a peak value from correlation values, and determines the detector sample position as synchronous channel symbol timing. The accumulation unit adds the respective correlation values for the sample positions to the correlation value corresponding to a position, which is spaced from the respective sample positions by a length of the synchronization block.

Abstract translation: 提供OFDM（正交频分复用）蜂窝系统，帧发送方法和帧发送机中的小区搜索方法，通过减小小区搜索单元的配置复杂度来减少OFDM蜂窝系统中的小区搜索时间。 同步检测器（622）包括相关计算器（701-A，701-B），信号耦合器（702），累积单元（703）和定时检测器（710）。 来自相关计算器的输出通过信号耦合器累积在累积单元中。 相关计算器在相应的同步块中产生4800个单元。 定时检测器从相关值检测具有峰值的样本的位置，并将检测器采样位置确定为同步信道符号定时。 累积单元将样本位置的各个相关值相加于与各个采样位置间隔一个同步块的长度的位置相对应的相关值。