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14 条记录 (耗时 0.017 秒)

    FFT apparatus for high data rate and method thereof
    1.
    发明授权
    FFT apparatus for high data rate and method thereof 有权
    用于高数据速率的FFT装置及其方法

    公开(公告)号：US07680870B2

    公开(公告)日：2010-03-16

    申请号：US11233138

    申请日：2005-09-23

    申请人： Jeong-sang Lee ,  Sung-hyun Chung ,  Jae-min Ahn ,  Min-joong Rim

    发明人： Jeong-sang Lee ,  Sung-hyun Chung ,  Jae-min Ahn ,  Min-joong Rim

    IPC分类号： G06F17/14

    CPC分类号： G06F17/142

    摘要： An FFT apparatus for quickly processing input signals and method thereof is disclosed. In performing the FFT for processing N input signals, four N/4-point FFT units implemented by radix-2 single-path delay feedback (R2SDF) units performs the FFT with respect to the input signals, and a radix-4 computation unit performs a radix-4 computation with respect to the signals transferred from the N/4-point FFT units. Accordingly, the input signals are processed in parallel through the N/4-point FFT units, and thus a quick process of the input signals can be performed.

    摘要翻译： 公开了一种用于快速处理输入信号的FFT装置及其方法。 在执行用于处理N个输入信号的FFT时，由基数2单路延迟反馈（R2SDF）单元实现的四个N / 4点FFT单元相对于输入信号执行FFT，并且基数-4计算单元执行 相对于从N / 4点FFT单元传送的信号的基数-4计算。 因此，输入信号通过N / 4点FFT单元并行处理，因此可以执行输入信号的快速处理。

    Method and apparatus for positioning portable subscriber station in WiBro network, and repeater having the same
    3.
    发明申请
    Method and apparatus for positioning portable subscriber station in WiBro network, and repeater having the same 审中-公开
    用于在WiBro网络中定位便携式用户台的方法和装置，以及具有相同的中继器

    公开(公告)号：US20070014252A1

    公开(公告)日：2007-01-18

    申请号：US11300238

    申请日：2005-12-14

    申请人： Sung-hyun Chung ,  Min-joong Rim

    发明人： Sung-hyun Chung ,  Min-joong Rim

    IPC分类号： H04J3/08

    CPC分类号： G01S5/0273 ,  G01S5/14 ,  H04W64/00

    摘要： Disclosed is a method and apparatus for positioning a portable subscriber station (PSS) using a WiBro repeater, and a repeater having the apparatus. The method of positioning the portable subscriber station in a network having a radio access station (RAS) and a repeater, including the operations of: detecting a preamble signal transmitted from the RAS; generating a reference time by measuring a receiving time of the preamble signal and by compensating the receiving time of the preamble signal by taking into consideration a signal delay time between the RAS and the repeater; measuring a receiving time of a ranging signal received from the PSS on the basis of the reference time; and calculating the receiving time of the ranging signal by using a time stamp generated on the basis of the receiving time of the preamble signal.

    摘要翻译： 公开了一种使用WiBro中继器定位便携式用户台（PSS）的方法和装置，以及具有该装置的中继器。 将便携式用户站定位在具有无线电接入站（RAS）和中继器的网络中的方法，包括以下操作：检测从RAS发送的前导码信号; 通过测量前导信号的接收时间并通过考虑RAS与中继器之间的信号延迟时间来补偿前导信号的接收时间来产生参考时间; 基于参考时间测量从PSS接收的测距信号的接收时间; 以及通过使用基于前导码信号的接收时间生成的时间标记来计算测距信号的接收时间。

    Interleaving method in OFDM system
    4.
    发明申请
    Interleaving method in OFDM system 有权
    OFDM系统中的交织方法

    公开(公告)号：US20060164973A1

    公开(公告)日：2006-07-27

    申请号：US11268473

    申请日：2005-11-08

    申请人： Jeong-sang Lee ,  Sung-hyun Chung ,  Jae-min Ahn ,  Min-joong Rim

    发明人： Jeong-sang Lee ,  Sung-hyun Chung ,  Jae-min Ahn ,  Min-joong Rim

    IPC分类号： H04J11/00

    CPC分类号： H04L1/0041 ,  H04L1/0071 ,  H04L27/2608

    摘要： Provided is an interleaving method that can reduce error occurring during transmission at a receiving end in an Orthogonal Frequency Division Multiplexing (OFDM) system. According to the interleaving method, transmitted data bits are recorded in an interleaving memory; and the stored data bits are read based on a predetermined sequence to perform symbol interleaving, tone interleaving and cyclic shift simultaneously. Also, to simplify the logic of the OFDM system, the data bits transmitted from an interleaver go through Fast Fourier Transform (FFT) mapping, and the FFT mapped data bits are modulated. In short, the logic can be simplified by performing FFT mapping followed by modulation.

    摘要翻译： 提供了一种可以减少在正交频分复用（OFDM）系统中的接收端发送期间发生的错误的交织方法。 根据交织方法，发送的数据位被记录在交织存储器中; 并且基于预定的顺序读取存储的数据位，以同时进行符号交织，色调交织和循环移位。 此外，为了简化OFDM系统的逻辑，从交织器发送的数据位通过快速傅里叶变换（FFT）映射，并且对FFT映射的数据位进行调制。 简而言之，可以通过执行FFT映射并进行调制来简化逻辑。

    Memory control circuit and method for a CD-ROM driving system
    7.
    发明授权
    Memory control circuit and method for a CD-ROM driving system 失效
    用于CD-ROM驱动系统的存储器控​​制电路和方法

    公开(公告)号：US5881314A

    公开(公告)日：1999-03-09

    申请号：US721582

    申请日：1996-09-25

    申请人： Sung-hyun Chung

    发明人： Sung-hyun Chung

    IPC分类号： G06F3/06 ,  G06F3/08 ,  G11B20/10 ,  G11B20/18

    CPC分类号： G06F3/0613 ,  G06F3/0658 ,  G06F3/0677 ,  G11B20/1833

    摘要： A memory control circuit in a CD-ROM driving system is provided which controls the writing and reading of data to and from a memory in accordance with a plurality of data operations. The circuit contains a plurality of requesters, a priority level determiner, and a memory control signal generator. The requesters correspond to the plurality of data operations and respectively generate request signals. Furthermore, the requesters respectively generate physical addresses of the memory which are respectively accessed during the data operations. The priority level determiner determines the priority levels of the request signals and outputs a selection signal based on the request signals and the priority levels. Moreover, the selection signal identifies one of the data operations as a selected data operation. The memory control signal generator generates a memory control signal and a memory address which corresponds to one of the physical addresses to be accessed during the selected data operation. As a result of the above-configuration, a request to transmit data from the memory to a high-speed host computer can be quickly satisfied, and thus, the efficiency of the host computer can be maintained. Also, a method which is performed by the memory control circuit is provided.

    摘要翻译： 提供了一种CD-ROM驱动系统中的存储器控​​制电路，其根据多个数据操作来控制对存储器的数据的写入和读取。 电路包含多个请求者，优先级确定器和存储器控制信号发生器。 请求者对应于多个数据操作并分别产生请求信号。 此外，请求者分别生成在数据操作期间分别访问的存储器的物理地址。 优先级确定器确定请求信号的优先级，并根据请求信号和优先级输出选择信号。 此外，选择信号将数据操作之一识别为选择的数据操作。 存储器控制信号发生器产生存储器控制信号和对应于在选择的数据操作期间被访问的物理地址之一的存储器地址。 作为上述结构的结果，可以快速地满足从存储器传输数据到高速主机的请求，从而可以保持主计算机的效率。 此外，提供了由存储器控制电路执行的方法。

    Interleaving method in OFDM system
    8.
    发明授权
    Interleaving method in OFDM system 有权
    OFDM系统中的交织方法

    公开(公告)号：US07797617B2

    公开(公告)日：2010-09-14

    申请号：US11268473

    申请日：2005-11-08

    申请人： Jeong-sang Lee ,  Sung-hyun Chung ,  Jae-min Ahn ,  Min-joong Rim

    发明人： Jeong-sang Lee ,  Sung-hyun Chung ,  Jae-min Ahn ,  Min-joong Rim

    IPC分类号： H03M13/03

    CPC分类号： H04L1/0041 ,  H04L1/0071 ,  H04L27/2608

    摘要： Provided is an interleaving method that can reduce error occurring during transmission at a receiving end in an Orthogonal Frequency Division Multiplexing (OFDM) system. According to the interleaving method, transmitted data bits are recorded in an interleaving memory; and the stored data bits are read based on a predetermined sequence to perform symbol interleaving, tone interleaving and cyclic shift simultaneously. Also, to simplify the logic of the OFDM system, the data bits transmitted from an interleaver go through Fast Fourier Transform (FFT) mapping, and the FFT mapped data bits are modulated. In short, the logic can be simplified by performing FFT mapping followed by modulation.

    摘要翻译： 提供了一种可以减少在正交频分复用（OFDM）系统中的接收端发送期间发生的错误的交织方法。 根据交织方法，发送的数据位被记录在交织存储器中; 并且基于预定的顺序读取存储的数据位，以同时进行符号交织，色调交织和循环移位。 此外，为了简化OFDM系统的逻辑，从交织器发送的数据位通过快速傅里叶变换（FFT）映射，并且对FFT映射的数据位进行调制。 简而言之，可以通过执行FFT映射并进行调制来简化逻辑。

    FFT apparatus for high data rate and method thereof
    9.
    发明申请
    FFT apparatus for high data rate and method thereof 有权
    用于高数据速率的FFT装置及其方法

    公开(公告)号：US20060129620A1

    公开(公告)日：2006-06-15

    申请号：US11233138

    申请日：2005-09-23

    申请人： Jeong-sang Lee ,  Sung-hyun Chung ,  Jae-min Ahn ,  Min-joong Rim

    发明人： Jeong-sang Lee ,  Sung-hyun Chung ,  Jae-min Ahn ,  Min-joong Rim

    IPC分类号： G06F17/14

    CPC分类号： G06F17/142

    摘要： An FFT apparatus for quickly processing input signals and method thereof is disclosed. In performing the FFT for processing N input signals, four N/4-point FFT units implemented by radix-2 single-path delay feedback (R2SDF) units performs the FFT with respect to the input signals, and a radix-4 computation unit performs a radix-4 computation with respect to the signals transferred from the N/4-point FFT units. Accordingly, the input signals are processed in parallel through the N/4-point FFT units, and thus a quick process of the input signals can be performed.

    摘要翻译： 公开了一种用于快速处理输入信号的FFT装置及其方法。 在执行用于处理N个输入信号的FFT时，由基数2单路延迟反馈（R2SDF）单元实现的四个N / 4点FFT单元相对于输入信号执行FFT，并且基数-4计算单元执行 相对于从N / 4点FFT单元传送的信号的基数-4计算。 因此，输入信号通过N / 4点FFT单元并行处理，因此可以执行输入信号的快速处理。

    Matched filter and cross correlation method
    10.
    发明申请
    Matched filter and cross correlation method 审中-公开
    匹配滤波器和互相关法

    公开(公告)号：US20060072689A1

    公开(公告)日：2006-04-06

    申请号：US11236596

    申请日：2005-09-28

    申请人： Yun-young Kim ,  Sung-hyun Chung ,  Jae-min Ahn ,  Min-joong Rim ,  Jae-ho Roh ,  Jae-hyun Koo

    发明人： Yun-young Kim ,  Sung-hyun Chung ,  Jae-min Ahn ,  Min-joong Rim ,  Jae-ho Roh ,  Jae-hyun Koo

    IPC分类号： H04L27/06

    CPC分类号： H03H17/0254 ,  H04B1/7093 ,  H04B1/71637

    摘要： Disclosed is a matched filter and a method for performing cross correlation thereof. The matched filter includes a demultiplexer for demultiplexing an input sample signal into a predetermined number of signals; and cross correlators that perform a cross correlation of each of the demultiplexed sample signals with a predetermined sequence. Therefore, when the matched filter of the present invention is applied to a UWB system having a high sampling rate, the cross correlation operation can be performed at a high rate simply by using low-rate multipliers.

    摘要翻译： 公开了一种匹配滤波器及其互相关的方法。 匹配滤波器包括用于将输入采样信号解复用为预定数量的信号的解复用器; 以及交叉相关器，其执行每个解复用的采样信号与预定序列的互相关。 因此，当将本发明的匹配滤波器应用于具有高采样率的UWB系统时，可以简单地通过使用低速率乘法器以高速率执行互相关运算。