公开(公告)号：WO2007081173A3

公开(公告)日：2008-09-25

申请号：PCT/KR2007000218

申请日：2007-01-12

Applicant: KOREA ELECTRONICS TELECOMM ,  KIM NAM-IL ,  KIM IL-GYU ,  JWA HYE-KYUNG ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

Inventor： KIM NAM-IL ,  KIM IL-GYU ,  JWA HYE-KYUNG ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04J11/00

CPC classification number: H04L27/2621

Abstract: The present invention provides an OFDM symbol generating apparatus. The OFDM symbol generating apparatus generates a plurality of weight-applied symbol groups by applying a plurality of weights to a digital modulation symbol group, and generates a plurality of IFFT symbol groups by performing an IFFT operation on the plurality of weight-applied symbol groups. Subsequently, an IFFT symbol group having the minimum PAPR is selected from among the plurality of IFFT symbol groups such that a characteristic of a PAPR can be improved without reducing data transmission speed.

Abstract translation: 本发明提供一种OFDM符号生成装置。 OFDM符号生成装置通过对数字调制符号组应用多个权重来生成多个加权的符号组，并通过对多个加权符号组进行IFFT运算来生成多个IFFT符号组。 随后，从多个IFFT符号组中选择具有最小PAPR的IFFT符号组，使得可以在不降低数据传输速度的情况下提高PAPR的特性。

公开(公告)号：BRPI0706360A2

公开(公告)日：2011-03-22

申请号：BRPI0706360

申请日：2007-05-25

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHANG KAP-SEOK ,  KIM IL-GYU ,  KIM NAM-IL ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04L27/26

Abstract: The invention provides a method of generating a downlink signal and searching a cell on the basis of the downlink signal in an OFDM-based cellular system. The downlink signal includes a plurality of synchronization blocks each having a plurality of sub-frames, and a synchronization pattern composed of a combination of a cell group identification code for identifying a cell group and a frame synchronization identification code for indicating a frame start point is generated in each of the synchronization blocks. Different frame synchronization identification codes are allocated to the synchronization blocks.

公开(公告)号：BRPI0706535A2

公开(公告)日：2011-03-29

申请号：BRPI0706535

申请日：2007-05-30

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHANG KAP-SEOK ,  KIM IL-GYU ,  KIM NAM-IL ,  PARK HYEONG-GEUN ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04B7/26

Abstract: An apparatus for generating a downlink signal and a cell search apparatus are disclosed. An apparatus for generating a downlink signal generates a downlink signal by one unique cell identification code group and a plurality of frame synchronization identification sequences, generates a downlink signal by a plurality of unique cell identification code groups and a plurality of frame synchronization identification sequences, or generates a downlink signal by a plurality of unique cell identification code groups and one frame synchronization identification sequence. A cell search apparatus obtains frame synchronization and identifies cells through a frame synchronization identification sequence and a unique cell identification code group.

公开(公告)号：EP1946461A4

公开(公告)日：2013-08-14

申请号：EP06812526

申请日：2006-11-10

Applicant: KOREA ELECTRONICS TELECOMM ,  SK TELECOM CO LTD ,  KT CORP

Inventor： KIM IL-GYU ,  PARK HYEONG-GEUN ,  KIM NAM-IL ,  CHANG KAP-SEOK ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04J11/00 ,  H04J13/00

CPC classification number: H04J11/0069 ,  H04J13/0066 ,  H04J13/0074 ,  H04L5/0016 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2662

Abstract: Provided are a cell search method, a forward link frame transmission method, an apparatus using the methods, and a forward link frame structure. The cell search apparatus includes a sync acquirer acquiring synchronization of sync channel symbols using a sync channel of a forward link, and a group detector detecting at least one hopping codeword element belonging to a hopping codeword of a target cell from a forward link signal containing sync channel symbols sequence-hopped using a hopping codeword corresponding to a code group to which a scrambling code of each cell belongs based on the acquired synchronization, and detecting a code group of the target cell based on the detected hopping codeword element, wherein the hopping codewords are orthogonal to a cyclic shift operation. Accordingly, a cell search time and the complexity of the cell search can be reduced.

公开(公告)号：EP2097994A4

公开(公告)日：2010-12-29

申请号：EP07746762

申请日：2007-05-30

Applicant: KOREA ELECTRONICS TELECOMM ,  SK TELECOM CO LTD ,  KT CORP

Inventor： CHANG KAP-SEOK ,  KIM IL-GYU ,  KIM NAM-IL ,  PARK HYEONG-GEUN ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04B7/26 ,  H04J11/00

CPC classification number: H04J11/0079 ,  H04L27/261 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2685