公开(公告)号：US08165254B2

公开(公告)日：2012-04-24

申请号：US12201084

申请日：2008-08-29

申请人： Cheol Ho Shin ,  Byoung Hak Kim ,  Sang Sung Choi ,  Kwang Rho Park

发明人： Cheol Ho Shin ,  Byoung Hak Kim ,  Sang Sung Choi ,  Kwang Rho Park

IPC分类号： H04L7/00

CPC分类号： H04L27/2665 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675

摘要： The present invention relates to an apparatus and a method for receiving signal for extent of timing synchronization in MB-OFDM UWB System. The invention divides the digital samples completed of sampling twice as much as minimum sampling clock required to restore the MB-OFDM received signal into ODD data path and EVEN data path, executes the packet detection and timing synchronization for each of divided path and selects the data of path with larger cross correlation value at the timing synchronization point to secure the stable receiving performance in system environment with severe frequency offset and prevent the FTT window shift within preamble section through adding minimum hardware and structural change without increasing the system clock.

摘要翻译： 本发明涉及一种用于在MB-OFDM UWB系统中接收定时同步程度的信号的装置和方法。 本发明将采样完成的数字采样与将数据采集信号恢复为ODD数据路径和EVEN数据通路所需的最小采样时钟相同，执行分割路径每个分组检测和定时同步，并选择数据 的路径在定时同步点具有较大的互相关值，以确保具有严重频率偏移的系统环境中的稳定接收性能，并且通过在不增加系统时钟的情况下添加最小硬件和结构变化来防止前导码部分内的FTT窗口偏移。

公开(公告)号：US08009728B2

公开(公告)日：2011-08-30

申请号：US11635937

申请日：2006-12-08

申请人： Kyu-Min Kang ,  Cheol-Ho Shin ,  Sung-Woo Choi ,  Sang-In Cho ,  Sang-Sung Choi ,  Kwang-Roh Park

发明人： Kyu-Min Kang ,  Cheol-Ho Shin ,  Sung-Woo Choi ,  Sang-In Cho ,  Sang-Sung Choi ,  Kwang-Roh Park

IPC分类号： H03H7/30

CPC分类号： H04L25/03038 ,  H04L2025/03439

摘要： A parallel equalizer for a DS-CDMA UWB system and method thereof are provided. The parallel equalizer includes: a filter block for filtering a training input signal in a ‘training mode’, and filtering the plurality of input signals in parallel in a ‘symbol decision mode’; a symbol decision block for obtaining a symbol error based on a output from the filter block and a training symbol in the ‘training mode’, and estimating a transmission symbol for each of the input signals in the ‘symbol decision mode’, obtaining an error of one among the estimated transmission symbols for a symbol error calculating input signal; and an weight update block for updating a filter tap coefficients of the filter block based on the training input signal or the symbol error calculating input signal and the symbol error and transmitting the updated filter tap coefficients into the filter block.

摘要翻译： 提供了一种用于DS-CDMA UWB系统的并行均衡器及其方法。 并行均衡器包括：滤波器块，用于以“训练模式”对训练输入信号进行滤波，并且以“符号判定模式”并行地对多个输入信号进行滤波; 用于基于来自滤波块的输出和“训练模式”中的训练符号获得符号误差的符号判定块，并且以“符号判定模式”为每个输入信号估计发送符号，获得误差 估计的传输符号中的一个用于符号误差计算输入信号; 以及权重更新块，用于基于训练输入信号或符号误差计算输入信号和符号错误来更新滤波器块的滤波器抽头系数，并将更新的滤波器抽头系数发送到滤波器块中。

公开(公告)号：US07924953B2

公开(公告)日：2011-04-12

申请号：US11948179

申请日：2007-11-30

申请人： Sung-Woo Choi ,  Cheol-Ho Shin ,  Kyu-Min Kang ,  Sang-Sung Choi

发明人： Sung-Woo Choi ,  Cheol-Ho Shin ,  Kyu-Min Kang ,  Sang-Sung Choi

IPC分类号： H04L27/06 ,  H04L7/00 ,  H04B1/69

CPC分类号： H04B1/713 ,  H04B1/709 ,  H04L5/0007 ,  H04L5/0037 ,  H04L27/2655 ,  H04L27/2675

摘要： Provided is an apparatus and method for detecting a time-frequency code in an MB-OFDM UWB system. The apparatus includes a controller for providing a band selection signal to the RF receiver and outputting a preamble selection signal at regular symbol periods to calculate a cross correlation value for a predetermined time period more than a beacon frame interval when a time-frequency code search start signal is received; and a cross correlator for storing information on preamble patterns, selecting a preamble stored depending on the preamble selection signal, and calculating a cross correlation value for a digital signal transferred through the RF receiver, wherein the controller determines a time-frequency code using a preamble where a peak occurs as a time-frequency code that is currently in use when a peak signal is inputted based on the calculated cross correlation value, and transmits the determined time-frequency code to the MAC receiver.

摘要翻译： 提供了一种用于检测MB-OFDM UWB系统中的时间 - 频率代码的装置和方法。 该装置包括控制器，用于向RF接收机提供频带选择信号，并以规则符号周期输出前导码选择信号，以便在时间频率代码搜索开始时比信标帧间隔多一个预定时间段内的互相关值 信号被接收; 以及交叉相关器，用于存储关于前导码模式的信息，选择根据前导选择信号存储的前导码，以及计算通过RF接收机传送的数字信号的互相关值，其中控制器使用前导码确定时间频率码 其中当基于所计算的互相关值输入峰值信号时作为当前正在使用的时间频率代码发生峰值，并将所确定的时间频率代码发送到MAC接收机。

公开(公告)号：US07831649B2

公开(公告)日：2010-11-09

申请号：US11576565

申请日：2005-11-02

申请人： Sang In Cho ,  Sang Sung Choi ,  Kwang Roh Park

发明人： Sang In Cho ,  Sang Sung Choi ,  Kwang Roh Park

IPC分类号： G06F17/14

CPC分类号： H04L27/263 ,  H04L27/265

摘要： Provided is a method for transforming data using a look-up table. The method includes the steps of: (a) mapping pre-processed input binary data to a constellation diagram divided into four quadrants to output a first complex number; (b) performing addition/subtraction operations between real numbers and between imaginary numbers with respect to the first complex number and a second complex number; and (c) reading a fourth complex from a look-up table in response to the first complex number, the second complex number and a third complex number, the look-up table outputting the fourth complex by performing a subtraction operation on multiplication results between real numbers and between imaginary numbers and an addition operation on multiplication results between the real numbers and the imaginary numbers with respect to the result value of the step (b) and the third complex number. Accordingly, it is possible to reduce the hardware size at the time of IFFT/FFT design and to provide a high-speed, low-power operation.

摘要翻译： 提供了一种使用查找表来转换数据的方法。 该方法包括以下步骤：（a）将预处理的输入二进制数据映射到分成四个象限的星座图，以输出第一个复数; （b）相对于第一复数和第二复数执行实数之间和虚数之间的加法/减法运算; 以及（c）响应于第一复数，第二复数和第三复数，从查找表读取第四复数，查找表通过对乘法结果执行减法运算来输出第四复数 实数和虚数之间以及相对于步骤（b）和第三复数的结果值的实数和虚数之间的相乘结果的加法运算。 因此，可以在IFFT / FFT设计时降低硬件尺寸并提供高速，低功率操作。

公开(公告)号：US07660339B2

公开(公告)日：2010-02-09

申请号：US11634006

申请日：2006-12-05

申请人： Cheol-Ho Shin ,  Sung-Woo Choi ,  Sang-In Cho ,  Kyu-Min Kang ,  Sang-Sung Choi ,  Kwang-Roh Park

发明人： Cheol-Ho Shin ,  Sung-Woo Choi ,  Sang-In Cho ,  Kyu-Min Kang ,  Sang-Sung Choi ,  Kwang-Roh Park

IPC分类号： H04B1/18 ,  H04B1/00

CPC分类号： H04L27/2657 ,  H04B1/7143 ,  H04B1/7163 ,  H04B2001/7154 ,  H04L27/2676

摘要： Provided are an apparatus and method for estimating and correcting a frequency offset in a multiband-Orthogonal Frequency Division Multiplexing Ultra-Wideband system using a time frequency hopping. The method includes the steps of: calculating a tangent input having a first value (X) and a second value (Y) by using PS symbols transferred over same frequency band with respect to one of a plurality of frequency bands used for frequency hopping; calculating tan(X/Y) using the first value (X) and the second value (Y), and calculating an index corresponding to the value of tan(X/Y) from a look-up table created by reflecting a relative frequency offset with respect to a center frequency; calculating indexes representing frequency offsets estimated with respect to remaining frequency bands used for frequency hopping from the look-up table by using the calculated index; extracting an index of a numerical controlled oscillator according to correction positions with respect to a plurality of frequency bands by using the calculated indexes; and correcting the frequency offsets estimated using the extracted indexes according to time frequency patterns by using a numerical controlled oscillator table.

摘要翻译： 提供了一种用于使用时间跳频估计和校正多频带 - 正交频分复用超宽带系统中的频率偏移的装置和方法。 该方法包括以下步骤：通过使用相对于用于跳频的多个频带之一的相同频带传输的PS符号来计算具有第一值（X）和第二值（Y）的切线输入; 使用第一值（X）和第二值（Y）计算tan（X / Y），并且从通过反映相对频率偏移产生的查找表计算与tan（X / Y）的值相对应的指数 相对于中心频率; 计算表示使用所计算的索引从查找表中跳频所使用的剩余频带估计的频率偏移的索引; 通过使用计算出的索引，根据关于多个频带的校正位置提取数控振荡器的索引; 以及通过使用数控振荡器表，根据时间频率模式校正使用所提取的索引估计的频率偏移。

公开(公告)号：US07624214B2

公开(公告)日：2009-11-24

申请号：US11861640

申请日：2007-09-26

申请人： Seong Hee Lee ,  Seong Hee Park ,  Il Soon Jang ,  Sang Sung Choi

发明人： Seong Hee Lee ,  Seong Hee Park ,  Il Soon Jang ,  Sang Sung Choi

IPC分类号： G06F13/00

CPC分类号： G06F13/387

摘要： A resource allocation method for performing resource competition between protocols based on a protocol in a home network environment using multiple protocols is provided. In the resource allocation method, a request of using a resource is received from an external device. An AIFS value is allocated according to a data type of the resource requested from the device. Then, the resource is not provided to the device for an AIFS period. After passing the period of the AIFS value, a back-off timer period is entered. In the back-off timer period, an application protocol of the external device requesting the resource is identified, and an idle time value is allocated according to a type of the identified protocol. Then, a corresponding resource is provided to the first device coming out of the allocated idle time.

摘要翻译： 提供了一种用于在使用多种协议的家庭网络环境中基于协议执行协议之间的资源竞争的资源分配方法。 在资源分配方法中，从外部设备接收到使用资源的请求。 根据从设备请求的资源的数据类型分配AIFS值。 然后，资源没有提供给AIFS周期的设备。 在通过AIFS值的周期后，输入退避定时器周期。 在退避定时器周期中，识别请求资源的外部设备的应用协议，并且根据所识别的协议的类型来分配空闲时间值。 然后，将相应的资源提供给从分配的空闲时间出来的第一设备。

公开(公告)号：US20080212564A1

公开(公告)日：2008-09-04

申请号：US11994453

申请日：2006-07-18

申请人： Seong-Hee Lee ,  Seong-Hee Park ,  Sang-Sung Choi

发明人： Seong-Hee Lee ,  Seong-Hee Park ,  Sang-Sung Choi

IPC分类号： H04J3/06

CPC分类号： H04L12/4625

摘要： Provided is a clock synchronization method in a heterogeneous network. The method includes the steps of: at a cycle master, transferring a cycle begin packet with a current time to a transmitting-side bridge; at the transmitting-side bridge, synchronizing using the time included in the cycle begin packet and a time to transmit the cycle begin packet, and transmitting the cycle begin packet with a first synchronization time to a wireless 1394 coordinator; at the wireless 1394 coordinator, synchronizing using the first synchronization time and calculating a second synchronization time; at the wireless 1394 coordinator, transmitting the beacon frame with a created information element structure to a receiving side bridge on a wired IEEE 1394 network; at the receiving bridge, synchronizing using the second synchronization time and calculating a third synchronization time; and at the receiving-side bridge, synchronizing the heterogeneous network by transferring the third synchronization time to the receiving node.

摘要翻译： 提供了异构网络中的时钟同步方法。 该方法包括以下步骤：在循环主站处，将具有当前时间的周期开始分组传送到发送侧桥; 在发送侧网桥中，使用包含在周期开始分组中的时间进行同步，并发送周期开始分组的时间，并将具有第一同步时间的周期开始分组发送到无线1394协调器; 在无线1394协调器处，使用第一同步时间同步并计算第二同步时间; 在无线1394协调器处，将具有创建的信息元素结构的信标帧发送到有线IEEE 1394网络上的接收侧桥; 在接收桥上，使用第二同步时间同步并计算第三同步时间; 并且在接收侧网桥处，通过将第三同步时间传送到接收节点来同步异构网络。

公开(公告)号：US20080137600A1

公开(公告)日：2008-06-12

申请号：US11952195

申请日：2007-12-07

申请人： Young Ae JEON ,  Sang Jae LEE ,  Sang Sung CHOI ,  Kwang Roh PARK

发明人： Young Ae JEON ,  Sang Jae LEE ,  Sang Sung CHOI ,  Kwang Roh PARK

IPC分类号： H04Q7/00

CPC分类号： H04W72/0446 ,  H04W28/26 ,  H04W84/10

摘要： Provided are a system and a method for allocating wireless resources in a WPAN. The system includes an MAC layer. The MAC layer divides a superframe into a predetermined number of groups, estimates the number of MASs requested by the MAC client and the number of required consecutive MASs, and allows the consecutive MASs to be distributed and allocated for each divided group. With this structure, adjacent clients can use a common MAS and thus a minimum resource is allocated to the adjacent clients in a WPAN.

摘要翻译： 提供了一种用于在WPAN中分配无线资源的系统和方法。 该系统包括MAC层。 MAC层将超帧划分成预定数量的组，估计MAC客户端请求的MAS数量和所需的连续MAS的数量，并允许为每个划分的组分配和分配连续的MAS。 利用这种结构，相邻的客户机可以使用公共MAS，因此在WPAN中将最小资源分配给相邻的客户机。

公开(公告)号：US20080098150A1

公开(公告)日：2008-04-24

申请号：US11877000

申请日：2007-10-23

申请人： Il-Soon JANG ,  Seong-Hee PARK ,  Seong-Hee LEE ,  Sang-Sung CHOI

发明人： Il-Soon JANG ,  Seong-Hee PARK ,  Seong-Hee LEE ,  Sang-Sung CHOI

IPC分类号： G06F13/00

CPC分类号： H04L45/00 ,  H04L12/40078 ,  H04L12/40091 ,  H04L45/02

摘要： Provided is a method for forming a route map in a wireless 1394 bridge network. The method for forming a route map in a wireless 1394 bridge network, including the steps of: a) storing route map information; b) collecting changed bus information when a new network is formed according to addition/removal of a bridge; c) checking whether a quantity of the collected bus information exceeds a threshold; d) forming a route map having all bus information when the quantity of the collected bus information exceeds a threshold; and e) forming a route map having changed bus information when collected bus information does not exceed the threshold.

摘要翻译： 提供了一种在无线1394桥接网络中形成路线图的方法。 一种在无线1394桥接网络中形成路线图的方法，包括以下步骤：a）存储路线图信息; b）根据桥的添加/删除形成新网络时收集改变的总线信息; c）检查所收集的总线信息的数量是否超过阈值; d）当所收集的总线信息的数量超过阈值时，形成具有所有总线信息的路线图; 以及e）当收集的总线信息不超过阈值时，形成具有改变的总线信息的路线图。

公开(公告)号：US20070133658A1

公开(公告)日：2007-06-14

申请号：US11634006

申请日：2006-12-05

申请人： Cheol-Ho Shin ,  Sung-Woo Choi ,  Sang-In Cho ,  Kyu-Min Kang ,  Sang-Sung Choi ,  Kwang-Roh Park

发明人： Cheol-Ho Shin ,  Sung-Woo Choi ,  Sang-In Cho ,  Kyu-Min Kang ,  Sang-Sung Choi ,  Kwang-Roh Park

IPC分类号： H04B1/00

CPC分类号： H04L27/2657 ,  H04B1/7143 ,  H04B1/7163 ,  H04B2001/7154 ,  H04L27/2676

摘要： Provided are an apparatus and method for estimating and correcting a frequency offset in a multiband-Orthogonal Frequency Division Multiplexing Ultra-Wideband system using a time frequency hopping. The method includes the steps of: calculating a tangent input having a first value (X) and a second value (Y) by using PS symbols transferred over same frequency band with respect to one of a plurality of frequency bands used for frequency hopping; calculating tan(X/Y) using the first value (X) and the second value (Y), and calculating an index corresponding to the value of tan(X/Y) from a look-up table created by reflecting a relative frequency offset with respect to a center frequency; calculating indexes representing frequency offsets estimated with respect to remaining frequency bands used for frequency hopping from the look-up table by using the calculated index; extracting an index of a numerical controlled oscillator according to correction positions with respect to a plurality of frequency bands by using the calculated indexes; and correcting the frequency offsets estimated using the extracted indexes according to time frequency patterns by using a numerical controlled oscillator table.

摘要翻译： 提供了一种用于使用时间跳频估计和校正多频带 - 正交频分复用超宽带系统中的频率偏移的装置和方法。 该方法包括以下步骤：通过使用相对于用于跳频的多个频带之一的相同频带传输的PS符号来计算具有第一值（X）和第二值（Y）的切线输入; 使用第一值（X）和第二值（Y）计算tan（X / Y），并且从通过反映相对频率偏移产生的查找表计算与tan（X / Y）的值相对应的指数 相对于中心频率; 计算表示使用所计算的索引从查找表中跳频所使用的剩余频带估计的频率偏移的索引; 通过使用计算出的索引，根据关于多个频带的校正位置提取数控振荡器的索引; 以及通过使用数控振荡器表，根据时间频率模式校正使用所提取的索引估计的频率偏移。