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公开(公告)号：JP2008141741A
公开(公告)日：2008-06-19
申请号：JP2007287539
申请日：2007-11-05
Applicant: Motorola Inc , モトローラ・インコーポレイテッドMotorola Incorporated
Inventor： FUKUDA MASAYA , AKITA HIDENORI
CPC classification number: H04L27/2613 , H04J11/0069 , H04J13/0062 , H04J13/0066 , H04L5/0007 , H04L5/0048 , H04L27/2655 , H04L27/2675
Abstract: PROBLEM TO BE SOLVED: To provide a method for transmitting primary and secondary synchronization channels, and to provide an apparatus thereof.
SOLUTION: During operation, a transmitter transmits a primary synchronization channel (P-SCH) in a subframe and a secondary synchronization channel (S-SCH) in the subframe. The S-SCH is modulated by a complex exponential wave and scrambled by a scrambling code. In a certain embodiment, the P-SCH comprises a GCL sequence or a Zadoff-Chu sequence, and the scrambling code uses the GCL sequence index of the P-SCH.
COPYRIGHT: (C)2008,JPO&INPITAbstract translation: 要解决的问题：提供一种用于发送主和同步信道的方法，并提供其装置。 解决方案：在操作期间，发射机在子帧中发送主同步信道（P-SCH）和副子同步信道（S-SCH）。 S-SCH由复指数波调制，并通过扰码进行加扰。 在一个实施例中，P-SCH包括GCL序列或Zadoff-Chu序列，并且扰码使用P-SCH的GCL序列索引。 版权所有（C）2008，JPO＆INPIT
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公开(公告)号：JP2007312377A
公开(公告)日：2007-11-29
申请号：JP2007114921
申请日：2007-04-25
Applicant: Motorola Inc , モトローラ・インコーポレイテッドMotorola Incorporated
Inventor： FUKUDA MASAYA , AKITA HIDENORI , HAYASHI HIROSHI
CPC classification number: H04L27/2613 , H04B1/70735 , H04J13/0066 , H04J13/0074 , H04J13/14 , H04L5/0007 , H04L5/0048 , H04L27/2655
Abstract: PROBLEM TO BE SOLVED: To provide a method and apparatus for fast cell search in a communication system for reducing the overhead of the communication system caused by a number of cell identifiers.
SOLUTION: Reference sequences are constructed from distinct "classes" of GCL sequences that have an optimal cyclic cross correlation property. The fast cell search method disclosed detects the "class indices" with simple processing. In a system deployment that uniquely maps sequences of certain class indices along with a circular shift amount in time domain to certain cells/cell IDs, the identification of a sequence index, and its circular shift will therefore provide an identification of the cell ID.
COPYRIGHT: (C)2008,JPO&INPITAbstract translation: 解决的问题：提供一种用于在通信系统中快速小区搜索的方法和装置，用于减少由多个小区标识符引起的通信系统的开销。 解决方案：参考序列由具有最佳循环互相关性质的GCL序列的不同“类”构成。 所公开的快速小区搜索方法通过简单的处理来检测“类索引”。 在将特定类索引的序列以及时域中的循环移位量唯一地映射到某些小区/小区ID的系统部署中，因此序列索引的识别及其循环移位将提供小区ID的标识。 版权所有（C）2008，JPO＆INPIT
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3.发明专利
公开(公告)号：JP2005323270A
公开(公告)日：2005-11-17
申请号：JP2004141103
申请日：2004-05-11
Applicant: Motorola Inc , モトローラ・インコーポレイテッドMotorola Incorporated
Inventor： AKITA HIDENORI
Abstract: PROBLEM TO BE SOLVED: To provide a multicarrier transmission system and receiving apparatus for multicarrier transmission capable of controlling a method of despreading a pilot channel while considering the state of a transmission line in multicarrier transmission.
SOLUTION: A reception apparatus 40 which receives a multicarrier CDMA signal from a transmission apparatus 20, despreads a pilot symbol in a pilot channel despreading section 44. A parameter control section 48 succeeds a result of despreading from the pilot channel despreading section 44 and estimates a despreading rate of a pilot channel which is orthogonal with another multiplexed channel group. The parameter control section 48 estimates a transmission line and calculates a delay spread. The derived despreading rate and delay spread of the pilot channel are then used to determine the pilot channel despreading rate while referring to a despreading method determination table.
COPYRIGHT: (C)2006,JPO&NCIPIAbstract translation: 要解决的问题：提供一种多载波传输的多载波传输系统和接收装置，其能够在考虑多载波传输中的传输线的状态的同时控制解扩导频信道的方法。 解决方案：接收装置40，其从发送装置20接收多载波CDMA信号，对导频信道解扩部44中的导频符号进行解扩。参数控制部48从导频信道解扩部44成功地解扩 并估计与另一多路复用信道组正交的导频信道的解扩率。 参数控制部48估计传输线并计算延迟扩展。 然后，引用导频信道的解扩频率和延迟扩展用于确定导频信道解扩率，同时参考解扩方法确定表。 版权所有（C）2006，JPO＆NCIPI
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公开(公告)号：JP2004236065A
公开(公告)日：2004-08-19
申请号：JP2003023165
申请日：2003-01-31
Applicant: Motorola Inc , モトローラ・インコーポレイテッドMotorola Incorporated
Inventor： AKITA HIDENORI , IKEDA SATORU
CPC classification number: H04L27/2663 , H04L27/2613
Abstract: PROBLEM TO BE SOLVED: To provide an OFDM communication device capable of conducting high quality transmission even if electric power for synchronization preamble is reduced. SOLUTION: At a symbol synchronization method in an OFDM communication device, a zero amplitude reduced preamble signal is obtained by passing a predetermined synchronization preamble into an ideal low-pass filter to reduce signal components near a zero amplitude in a time domain. An OFDM signal to be transmitted is generated by time-multiplexing the zero amplitude reduced preamble signal with data to be transmitted. At a receiver side, reciprocal correlation between a predetermined synchronization preamble having a pattern same as a transmitter side and a received signal is determined, and a synchronization position is detected based on the cross correlation. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract translation: 要解决的问题：即使减少用于同步前导码的电力，也能够提供能够进行高质量传输的OFDM通信设备。 解决方案：在OFDM通信设备中的符号同步方法中，通过将预定的同步前同步码传递到理想的低通滤波器中以减少时域中的零幅度附近的信号分量来获得零幅度减小的前导信号。 要发送的OFDM信号是通过将零幅度减小的前同步信号与要发送的数据进行时分复用来生成的。 在接收机侧，确定具有与发送机侧相同的模式的预定同步前导码与接收信号之间的相互关联，并且基于互相关来检测同步位置。 版权所有（C）2004，JPO＆NCIPI
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公开(公告)号：BRPI0707600A2
公开(公告)日：2011-05-10
申请号：BRPI0707600
申请日：2007-01-27
Applicant: MOTOROLA INC
Inventor： AKITA HIDENORI , BAUM KEVIN L , CLASSON BRIAN K , FUKUTA MASAYA , HAYASHI HIROSHI , NANGIA VIJAY , LOVE ROBERT T , STEWART KENNETH A
IPC: H04J11/00
Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal, the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth and including information for providing at least partial cell identification information. The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection and frame boundary detection and cell specific information detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.
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Patent Agency Ranking
公开(公告)号：BRPI0707532A2
公开(公告)日：2011-05-03
申请号：BRPI0707532
申请日：2007-01-27
Applicant: MOTOROLA INC
Inventor： AKITA HIDENORI , BAUM KEVIN L , CLASSON BRIAN K , FUKUTA MASAYA , HAYASHI HIROSHI , NANGIA VIJAY , LOVE ROBERT T , STEWART KENNETH A
IPC: H04J11/00
Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal (818), the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth (816). The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection by differential processing of sequence elements of the synchronization channel signal (1112) and frame boundary detection and cell specific information detection (1114) in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.
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公开(公告)号：BRPI0717948A2
公开(公告)日：2013-12-03
申请号：BRPI0717948
申请日：2007-10-23
Applicant: MOTOROLA INC
Inventor： FUKUTA MASAYA , AKITA HIDENORI
Abstract: A method and apparatus for transmitting a primary and secondary synchronization channel is provided herein. During operation a transmitter will transmit a primary synchronization channel (P-SCH) in a subframe and a secondary synchronization channel (S-SCH) in the subframe. The S-SCH is modulated by a complex exponential wave and scrambled with a scrambling code. In certain embodiments of the present invention the P-SCH comprises a GCL sequence or a Zadoff-Chu sequence and the scrambling code is based on the GCL sequence index of the P-SCH.
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公开(公告)号：AR060941A1
公开(公告)日：2008-07-23
申请号：ARP070102097
申请日：2007-05-15
Applicant: MOTOROLA INC
Inventor： FUKUTA MASAYA , AKITA HIDENORI , HAYASHI HIROSHI
Abstract: Se construyen secuencias de referencia a partir de ôclasesö diferenciadas de secuencias GCL que tienen una propiedad optima de correlacion cruzada cíclica. El método de la busqueda veloz de celda expuesto detecta los ôíndices de claseö con procesamiento simple. En un despliegue del sistema que correlaciona de modo unico las secuencias de ciertos índices de clase junto con una cantidad de desplazamiento circular en el dominio de tiempo con ciertas celdas y ciertas ID de celdas, la identificacion de un índice de secuencia y su desplazamiento circular proveen por lo tanto una identificacion de ID de celda.
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公开(公告)号：AR063590A1
公开(公告)日：2009-02-04
申请号：ARP070104947
申请日：2007-11-06
Applicant: MOTOROLA INC
Inventor： FUKUTA MASAYA , AKITA HIDENORI
Abstract: Se provee un método y un aparato para transmitir un canal de sincronización primario y secundario. Durante la operación, un transmisor transmite un canal de sincronización primario (P-SCH) en un submarco y un canal de sincronización secundario (S- SCH) en el submarco. El S-SCH es modulado por una onda exponencial compleja y objeto de scramble con un código de scramble. En ciertas formas de realización de la presente, el P-SCH comprende una secuencia GCL o una secuencia Zadoff-Chu y el código de scramble se basa en el índice de la secuencia GCL del P-SCH.
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公开(公告)号：EP1597887A4
公开(公告)日：2009-12-09
申请号：EP04707023
申请日：2004-01-30
Applicant: MOTOROLA INC
Inventor： AKITA HIDENORI , IKEDA TETSU
CPC classification number: H04L27/2663 , H04L27/2613
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