公开(公告)号：US08340219B2

公开(公告)日：2012-12-25

申请号：US12445234

申请日：2007-10-10

申请人： Moon-Sik Lee ,  Nam-Il Kim ,  Hyeong-Geun Park ,  Il-Gyu Kim ,  Young-Hoon Kim ,  Seung-Chan Bang

发明人： Moon-Sik Lee ,  Nam-Il Kim ,  Hyeong-Geun Park ,  Il-Gyu Kim ,  Young-Hoon Kim ,  Seung-Chan Bang

IPC分类号： H04L27/00

CPC分类号： H04W72/0406 ,  H04B1/30 ,  H04B1/406

摘要： Provided are a receiver and a receiving method for a scalable bandwidth in a mobile station of an Orthogonal Frequency Division Multiplexing (OFDM) system. The receiving method includes the steps of: (a) filtering a received RF signal; (b) oscillating a frequency according to a center frequency control signal to output a local oscillation frequency; (c) down-converting the filtered RF signal by using the local oscillation frequency; (d) scalable-filtering the down-converted signal while adjusting a bandwidth according to a bandwidth control signal; (e) controlling gain of the scalable-filtered signal; (f) converting the gain-controlled analog signal into a digital signal by using a sampling frequency matching with a corresponding bandwidth according to an ADC control signal; and (g) demodulating the converted digital signal, outputting the center frequency control signal, the bandwidth control signal, and the ADC control signal according to control information received from an upper layer.

摘要翻译： 提供了一种用于正交频分复用（OFDM）系统的移动台中的可扩展带宽的接收机和接收方法。 接收方法包括以下步骤：（a）对接收到的RF信号进行滤波; （b）根据中心频率控制信号振荡频率以输出本地振荡频率; （c）使用本地振荡频率对滤波的RF信号进行下变频; （d）在根据带宽控制信号调整带宽的同时可缩放滤波下变频信号; （e）控制所述可缩放滤波信号的增益; （f）通过使用根据ADC控制信号的与相应带宽匹配的采样频率将增益控制模拟信号转换成数字信号; 和（g）根据从上层接收到的控制信息解调转换的数字信号，输出中心频率控制信号，带宽控制信号和ADC控制信号。

公开(公告)号：US20100104001A1

公开(公告)日：2010-04-29

申请号：US12445234

申请日：2007-10-10

申请人： Moon-Sik Lee ,  Nam-Il Kim ,  Hyeong-Geun Park ,  Il-Gyu Kim ,  Young-Hoon Kim ,  Seung-Chan Bang

发明人： Moon-Sik Lee ,  Nam-Il Kim ,  Hyeong-Geun Park ,  Il-Gyu Kim ,  Young-Hoon Kim ,  Seung-Chan Bang

IPC分类号： H04B1/66 ,  H04L27/08

CPC分类号： H04W72/0406 ,  H04B1/30 ,  H04B1/406

摘要： Provided are a receiver and a receiving method for a scalable bandwidth in a mobile station of an Orthogonal Frequency Division Multiplexing (OFDM) system. The receiving method includes the steps of: (a) filtering a received RF signal; (b) oscillating a frequency according to a center frequency control signal to output a local oscillation frequency; (c) down-converting the filtered RF signal by using the local oscillation frequency; (d) scalable-filtering the down-converted signal while adjusting a bandwidth according to a bandwidth control signal; (e) controlling gain of the scalable-filtered signal; (f) converting the gain-controlled analog signal into a digital signal by using a sampling frequency matching with a corresponding bandwidth according to an ADC control signal; and (g) demodulating the converted digital signal, outputting the center frequency control signal, the bandwidth control signal, and the ADC control signal according to control information received from an upper layer.

摘要翻译： 提供了一种用于正交频分复用（OFDM）系统的移动台中的可扩展带宽的接收机和接收方法。 接收方法包括以下步骤：（a）对接收到的RF信号进行滤波; （b）根据中心频率控制信号振荡频率以输出本地振荡频率; （c）使用本地振荡频率对滤波的RF信号进行下变频; （d）在根据带宽控制信号调整带宽的同时可缩放滤波下变频信号; （e）控制所述可缩放滤波信号的增益; （f）通过使用根据ADC控制信号的与相应带宽匹配的采样频率将增益控制模拟信号转换成数字信号; 和（g）根据从上层接收到的控制信息解调转换的数字信号，输出中心频率控制信号，带宽控制信号和ADC控制信号。

公开(公告)号：US20090252109A1

公开(公告)日：2009-10-08

申请号：US12158868

申请日：2006-12-22

申请人： Il-Gyu Kim ,  Hyeong-Geun Park ,  Nam-Il Kim ,  Kap-Seok Chang ,  Moon-Sik Lee ,  Young-Hoon Kim ,  Seung-Chan Bang

发明人： Il-Gyu Kim ,  Hyeong-Geun Park ,  Nam-Il Kim ,  Kap-Seok Chang ,  Moon-Sik Lee ,  Young-Hoon Kim ,  Seung-Chan Bang

IPC分类号： H04W72/04 ,  H04J11/00

CPC分类号： H04B7/0689 ,  H04B7/0408 ,  H04B7/0604 ,  H04B7/068 ,  H04B7/0695 ,  H04L1/0625 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/2647 ,  Y02D70/142 ,  Y02D70/444

摘要： The present invention relates to a method for demodulating a BCH by using an SCH in an OFDM system with transmit diversity, and a transmitting apparatus and a receiving apparatus using the same. For this purpose, the present invention provides a transmit diversity transmission method for a transmitting apparatus of a base station that generates an SCH symbol and a BCH symbol, maps the SCH symbol and the BCH symbol to an OFDM signal, converts the OFDM signal into a time domain signal, and transmits the OFDM signal trough a selected antenna among a plurality of antennas. In addition, the present invention provides a method for demodulating a BCH by using an SCH to a mobile station that receives an OFDM signal from the base station, filters an SCH and a BCH from the OFDM signal, converts the OFDM signal to a frequency domain signal, calculates a channel estimation value by using the SCH and the BCH, and coherently demodulates the BCH. According to the present invention, coherent demodulation of a BCH can reduce a frame error generation probability, minimize a channel estimation error due to fading, reduce time for checking the number of antennas of the base station and time for demodulating the BCH, and reduce power consumption.

摘要翻译： 本发明涉及一种使用具有发射分集的OFDM系统中的SCH解调BCH的方法，以及使用该方法的发送装置和接收装置。 为此，本发明提供一种用于生成SCH符号和BCH符号的基站的发送装置的发送分集发送方法，将SCH符号和BCH符号映射到OFDM信号，将OFDM信号变换为 时域信号，并且通过多个天线中的所选天线发送OFDM信号。 此外，本发明提供了一种通过使用SCH对从基站接收OFDM信号的SCH进行解调的BCH的方法，从OFDM信号对SCH和BCH进行滤波，将OFDM信号转换为频域 信号，通过使用SCH和BCH来计算信道估计值，并相干地解调BCH。 根据本发明，BCH的相干解调可以降低帧错误生成概率，使由于衰落引起的信道估计误差最小化，减少用于检查基站天线数量的时间和用于解调BCH的时间，并且降低功率 消费。

公开(公告)号：US20080316913A1

公开(公告)日：2008-12-25

申请号：US12094238

申请日：2006-11-17

申请人： Il-Gyu Kim ,  Hyeong-Geun Park ,  Kap-Seok Chang ,  Young-Hoon Kim ,  Seung-Chan Bang ,  Eun-Jeong Shin ,  Hye-Kyung Jwa ,  Moon-Sik Lee

发明人： Il-Gyu Kim ,  Hyeong-Geun Park ,  Kap-Seok Chang ,  Young-Hoon Kim ,  Seung-Chan Bang ,  Eun-Jeong Shin ,  Hye-Kyung Jwa ,  Moon-Sik Lee

IPC分类号： H04J11/00

CPC分类号： H04B7/061 ,  H04L1/06 ,  H04L1/1893 ,  H04L5/0023 ,  H04L5/0044

摘要： The present invention relates to a packet data transmission method in an OFDMA system and an apparatus thereof. The present invention provides a user packet data transmission method including generating a RACH burst for channel information estimation, selecting a first antenna among a plurality of antennas, transmitting the RACH burst through the first antenna to a base station, receiving a data transmission acceptance signal from the base station, in response to the RACH burst, transmitting user packet data through the first antenna when receiving a signal indicating that the data transmission is allowed, and selecting a second antenna that is difference from the first antenna and transmitting a RACH burst through the second antenna when receiving a signal indicating that the data transmission is not allowed, and a transmitting apparatus of a mobile station having the plurality of antennas. According to the present invention, the RACH burst and user packet data are transmitted by using a mobile station having a plurality of antennas in an LTE-applied OFDMA system, and therefore data transmission can be performed with a wide bandwidth and high data rate and a deep fading period that may occur during the data transmission can be reduced, thereby preventing call dropping and improving data transmission performance.

摘要翻译： 本发明涉及OFDMA系统中的分组数据传输方法及其装置。 本发明提供了一种用户分组数据传输方法，包括：生成用于信道信息估计的RACH脉冲串，选择多个天线中的第一天线，通过第一天线发送RACH脉冲串到基站;从基站接收数据传输接收信号; 所述基站响应于所述RACH突发，当接收到指示允许所述数据传输的信号时，通过所述第一天线发送用户分组数据，并且选择与所述第一天线不同并且通过所述第一天线发送RACH突发的第二天线 在接收到指示不允许数据传输的信号的第二天线以及具有多个天线的移动台的发送装置。 根据本发明，通过在LTE应用的OFDMA系统中使用具有多个天线的移动台来发送RACH突发和用户分组数据，因此可以以宽带宽和高数据速率进行数据传输，并且 可以减少在数据传输期间可能发生的深度衰落周期，从而防止呼叫丢弃并提高数据传输性能。

公开(公告)号：US09450796B2

公开(公告)日：2016-09-20

申请号：US12523125

申请日：2008-01-04

申请人： Moon-Sik Lee ,  Hye-Kyung Jwa ,  Hyoseok Yi ,  Young-Hoon Kim ,  Seung-Chan Bang

发明人： Moon-Sik Lee ,  Hye-Kyung Jwa ,  Hyoseok Yi ,  Young-Hoon Kim ,  Seung-Chan Bang

IPC分类号： H04L27/00 ,  H04L27/26

CPC分类号： H04L27/2607 ,  H04L69/323 ,  H04W74/006

摘要： Provided is a method of forming a random access preamble structure for an extended cell radius in a cellular system, the method including: generating a cyclic prefix (CP), which is the sum of a maximum delay spread and the maximum round trip delay according to the extended cell; generating a preamble sequence part. The method is used to form a preamble structure for an extended cell radius from among random access preamble structures transmitted when initial synchronization is achieved, when synchronization is lost, or when a handover is performed, during a random access process of the cellular system.

摘要翻译： 提供了一种在蜂窝系统中形成用于扩展小区半径的随机接入前导码结构的方法，所述方法包括：根据根据本发明的方法，生成循环前缀（CP），其是最大延迟扩展和最大往返延迟之和 扩展单元格 生成前导序列部分。 该方法用于在实现初始同步时，当同步丢失时，或者当在蜂窝系统的随机接入过程中执行切换时，从发送的随机接入前同步码结构中形成用于扩展小区半径的前导码结构。

公开(公告)号：US20100080307A1

公开(公告)日：2010-04-01

申请号：US12523125

申请日：2008-01-04

申请人： Moon-Sik Lee ,  Hye-Kyung Jwa ,  Hyoseok Yi ,  Young-Hoon Kim

发明人： Moon-Sik Lee ,  Hye-Kyung Jwa ,  Hyoseok Yi ,  Young-Hoon Kim

IPC分类号： H04L27/00

CPC分类号： H04L27/2607 ,  H04L69/323 ,  H04W74/006

摘要： Provided is a method of forming a random access preamble structure for an extended cell radius in a cellular system, the method including: generating a cyclic prefix (CP), which is the sum of a maximum delay spread and the maximum round trip delay according to the extended cell; generating a preamble sequence part. The method is used to form a preamble structure for an extended cell radius from among random access preamble structures transmitted when initial synchronization is achieved, when synchronization is lost, or when a handover is performed, during a random access process of the cellular system.

摘要翻译： 提供了一种在蜂窝系统中形成用于扩展小区半径的随机接入前导码结构的方法，所述方法包括：根据根据本发明的方法，生成循环前缀（CP），其是最大延迟扩展和最大往返延迟之和 扩展单元格 生成前导序列部分。 该方法用于在实现初始同步时，当同步丢失时，或者当在蜂窝系统的随机接入过程中执行切换时，从发送的随机接入前同步码结构中形成用于扩展小区半径的前导码结构。

公开(公告)号：US08565700B2

公开(公告)日：2013-10-22

申请号：US13284768

申请日：2011-10-28

申请人： Moon-Sik Lee

发明人： Moon-Sik Lee

IPC分类号： H04B7/08 ,  H04K3/00

CPC分类号： H04L5/0064 ,  H04L5/001 ,  H04W28/06 ,  H04W72/00 ,  H04W92/02

摘要： Provided are a reception apparatus and transmission apparatus for supporting a scalable bandwidth in a carrier aggregation environment. The reception apparatus and transmission apparatus can link carrier aggregation technology and scalable bandwidth technology by supporting a scalable bandwidth having different bandwidths in size in a carrier aggregation environment, thereby enhancing compatibility between different wireless communication systems.

摘要翻译： 提供一种用于在载波聚合环境中支持可扩展带宽的接收装置和传输装置。 接收装置和发送装置可以通过在载波聚合环境中支持具有不同带宽的可扩展带宽，从而增强不同无线通信系统之间的兼容性，从而链接载波聚合技术和可扩展带宽技术。

公开(公告)号：US5828927A

公开(公告)日：1998-10-27

申请号：US874131

申请日：1997-06-12

申请人： Yong-Baek Yoo ,  Moon-Sik Lee ,  Tagoku Izumi

发明人： Yong-Baek Yoo ,  Moon-Sik Lee ,  Tagoku Izumi

IPC分类号： G03G15/00 ,  G03G15/16 ,  G03G21/00

CPC分类号： G03G15/1675 ,  G03G2215/1652

摘要： A back side of a paper is protected from contamination during an operation of the electrophotographic printer. A light scanning unit is warmed up as the main motor operates. This should minimize the potential difference on the surface of the photosensitive drum. A zero or a less than zero voltage is applied to its transfer roller to prevent the toner from adhering to the transfer roller before a paper reaches the transfer roller. This protects the back side of the paper from contamination due to the toner.

摘要翻译： 在电子照相打印机的操作期间，纸的背面被保护免受污染。 随着主电机的运行，光扫描单元被加热。 这应使感光鼓表面的电位差最小化。 在其转印辊上施加0或小于零的电压，以防止在纸张到达转印辊之前调色剂粘附到转印辊上。 这样可以保护纸张的背面免受由于调色剂的污染。

公开(公告)号：US5715380A

公开(公告)日：1998-02-03

申请号：US646495

申请日：1996-05-08

申请人： Moon-Sik Lee

发明人： Moon-Sik Lee

IPC分类号： G06F3/12 ,  G06K15/00

CPC分类号： G06K15/00 ,  G06K2215/0082

摘要： An image forming apparatus having a multiuser identification printing method for printing user identification data on a printout, the image forming apparatus being shared by plural users wherein the image forming apparatus receives data to be printed through an interface thereof, checks whether a print command is received, and when the print command is received, obtains user identification data, which is stored in an external data input device, from the external data input device that has transmitted the data, and prints the received data together with user identification data.

摘要翻译： 一种图像形成装置，具有用于在打印输出上打印用户识别数据的多用户识别打印方法，所述图像形成装置由多个用户共享，其中图像形成装置通过其界面接收要打印的数据，检查是否接收到打印命令 并且当接收到打印命令时，从已经发送数据的外部数据输入装置获取存储在外部数据输入装置中的用户识别数据，并且将所接收的数据与用户识别数据一起打印。