公开(公告)号：US07746966B2

公开(公告)日：2010-06-29

申请号：US11791442

申请日：2005-06-24

Applicant: Yong-Su Lee ,  Youn-Ok Park ,  Jun-Woo Kim ,  Young-Jo Bang

Inventor： Yong-Su Lee ,  Youn-Ok Park ,  Jun-Woo Kim ,  Young-Jo Bang

IPC: H04L27/08

CPC classification number: H03G3/3078 ,  H04L27/2647 ,  H04L27/2662

Abstract: The present invention relates to a method for automatic gain control (AGC) before an initial synchronization of a mobile station modem in OFDM system, and an apparatus thereof. The AGC apparatus includes: an initial synchronization inspector that verifies whether an initial synchronization for an input block sample (k) signal has been performed; a frame divider that divides a frame into predetermined intervals B(k) for the input block sample(k) signal in the case that the initial synchronization has not been performed; a reference value inspector that compares a difference value Pref−Pcalc, between a predetermined reference value Pref and sample data average energy Pcalc, with a predetermined value; a count controller that increases or decreases the count when the difference value Pref−Pcalc compared by the reference value inspector is greater or less than the predetermined value; a count inspector that inspects whether the count is greater or less than 0 when the input block sample (k) reaches a maximum value MAX; and a gain controller which increases or decreases the gain, level by level, according to the count inspection result of the count inspector.

Abstract translation: 本发明涉及OFDM系统中的移动台调制解调器的初始同步之前的自动增益控制（AGC）的方法及其装置。 AGC装置包括：初始同步检查器，其验证是否已经执行了输入块样本（k）信号的初始同步; 在没有执行初始同步的情况下，对于输入块样本（k）信号将帧划分成预定间隔B（k）的帧分割器; 参考值检查器，将预定参考值Pref和采样数据平均能量Pcalc之间的差值Pref-Pcalc与预定值进行比较; 当由参考值检查器比较的差值Pref-Pcalc大于或小于预定值时增加或减少计数的计数控制器; 当输入块样本（k）达到最大值MAX时，检查计数是否大于或小于0的计数检查器; 以及根据计数检查员的计数检查结果逐级增加或减少增益的增益控制器。

公开(公告)号：US20100142661A1

公开(公告)日：2010-06-10

申请号：US12510120

申请日：2009-07-27

Applicant: Hoon LEE ,  Young Jo BANG ,  Seungjae BAHNG ,  Youn Ok PARK

Inventor： Hoon LEE ,  Young Jo BANG ,  Seungjae BAHNG ,  Youn Ok PARK

IPC: H04B1/06 ,  H04L27/08

CPC classification number: H03G3/3052

Abstract: The present invention relates to a device for gain control and a method for receiving a signal. The device for gain control according to the present invention includes a map interpreter that detects beamforming symbol periods in wireless signals, a power calculator that calculate the average power of the beamforming symbol periods in response to outputs of the map interpreter, a gain calculator that calculates gain control signals on the basis of the output signals of the power calculator, and a switch that outputs gains from the gain control signals, in which the wireless signals are corrected on the basis of the gains.

Abstract translation: 本发明涉及一种用于增益控制的装置和一种接收信号的方法。 根据本发明的用于增益控制的装置包括：地图解释器，其检测无线信号中的波束成形符号周期;功率计算器，其响应于地图解释器的输出计算波束成形符号周期的平均功率;计算增益计算器 基于功率计算器的输出信号的增益控制信号和从增益控制信号输出增益的开关，其中基于增益来校正无线信号。

公开(公告)号：US20100142654A1

公开(公告)日：2010-06-10

申请号：US12629433

申请日：2009-12-02

Applicant: Young Jo BANG ,  Young Ha LEE ,  Jung Pil CHOI ,  Hoon LEE ,  Seungjae BAHNG ,  Youn Ok PARK ,  Il Min KIM

Inventor： Young Jo BANG ,  Young Ha LEE ,  Jung Pil CHOI ,  Hoon LEE ,  Seungjae BAHNG ,  Youn Ok PARK ,  Il Min KIM

IPC: H04L27/06

CPC classification number: H04L25/0321 ,  H04L27/34 ,  H04L2025/03426

Abstract: In a multi-input multi-output communication system receiving signals transmitted through a plurality of transmission antennas by using a plurality of reception antennas, a matrix determining a position of a symbol to be detected from a received signal is calculated at a first symbol detection step, and from the subsequent step, a matrix at the current step is acquired through a simple relationship from the matrix calculated at the previous step to determine a position of a symbol to be detected.

Abstract translation: 在通过使用多个接收天线接收通过多个发送天线发送的信号的多输入多输出通信系统中，在第一符号检测步骤中计算从接收信号确定要检测的符号的位置的矩阵 ，并且从后续步骤，通过从在前一步骤计算的矩阵的简单关系获取当前步骤中的矩阵，以确定要检测的符号的位置。

公开(公告)号：US20100135438A1

公开(公告)日：2010-06-03

申请号：US12627506

申请日：2009-11-30

Applicant: Young Jo BANG ,  Hyeong Sook PARK ,  Jun-Woo KIM ,  Kyung Yeol SOHN ,  Chang Wahn YU ,  Youn Ok PARK ,  Jee Hwan AHN ,  Il Min KIM

Inventor： Young Jo BANG ,  Hyeong Sook PARK ,  Jun-Woo KIM ,  Kyung Yeol SOHN ,  Chang Wahn YU ,  Youn Ok PARK ,  Jee Hwan AHN ,  Il Min KIM

IPC: H04L27/06

CPC classification number: H04L25/067 ,  H04B7/0413

Abstract: Disclosed is a method of detecting signals at a receiver of a communication system with a multiple input multiple output antenna. With the signal detection method, a square of the distance between a received signal vector and a channel status-considered transmission symbol vector is calculated first, and the square of the distance is then classified into first and second components. The first component is minimized to calculate a plurality of first soft symbol estimates. A solution set of the first component is calculated on the basis of the plurality of first soft symbol estimates. The second component is minimized to calculate a plurality of second soft symbol estimates. A solution set of the second component is calculated on the basis of the plurality of second soft symbol estimates. A final solution set is calculated by doing the sum of the first component solution set and the second component solution.

Abstract translation: 公开了一种在具有多输入多输出天线的通信系统的接收机处检测信号的方法。 利用信号检测方法，首先计算接收信号矢量和通道状态考虑的发送符号向量之间的距离的平方，然后将距离的平方分成第一和第二分量。 将第一分量最小化以计算多个第一软符号估计。 基于多个第一软符号估计来计算第一分量的解集合。 将第二分量最小化以计算多个第二软符号估计。 基于多个第二软符号估计来计算第二分量的解集合。 通过执行第一分量解集合和第二分量解的和来计算最终解集。

公开(公告)号：US20100128819A1

公开(公告)日：2010-05-27

申请号：US11721139

申请日：2005-09-06

Applicant: Yong-Su Lee ,  Youn-OK Park ,  Eon-Young Hong

Inventor： Yong-Su Lee ,  Youn-OK Park ,  Eon-Young Hong

IPC: H04L25/06

CPC classification number: H04B1/7176 ,  H04B1/7183 ,  H04L25/06 ,  H04L27/2655

Abstract: An apparatus and method for canceling a DC offset efficiently removes the DC offset by calculating the DC offset after acquiring synchronization in a terminal receiver used for an orthogonal frequency division multiplexing system. The apparatus for canceling the DC offset includes an adding/averaging unit (130), an accumulator (140), a synchronization determiner (150), and a pulse density modulation signal generator (160). The adding and averaging the added input data signals over one frame. The accumulator (140) outputs a DC offset control value by successively accumulating the DX offsets calculated from the adding and averaging unit. The synchronization determiner (150) determines whether to output the DC offset control value provided by the accumulator (140) based on synchronization information. The pulse density modulation signal generator (160) generates a digital pulse density modulation signal based on a representative value provided by the synchronization determiner (150).

Abstract translation: 用于消除DC偏移的装置和方法通过在用于正交频分复用系统的终端接收机中获取同步之后计算DC偏移来有效地去除DC偏移。 用于消除DC偏移的装置包括加法/平均单元（130），累加器（140），同步确定器（150）和脉冲密度调制信号发生器（160）。 在一帧内添加和平均添加的输入数据信号。 累加器（140）通过连续积累从加法和平均单元计算的DX偏移量来输出DC偏移控制值。 同步确定器（150）基于同步信息确定是否输出由累加器（140）提供的DC偏移控制值。 脉冲密度调制信号发生器（160）根据由同步确定器（150）提供的代表值产生数字脉冲密度调制信号。

公开(公告)号：US07593754B2

公开(公告)日：2009-09-22

申请号：US11635715

申请日：2006-12-07

Applicant: Young-Ha Lee ,  Youn-Ok Park

Inventor： Young-Ha Lee ,  Youn-Ok Park

IPC: H04M1/00 ,  H04Q7/20

CPC classification number: H04B7/0845

Abstract: A receiving method and apparatus of an orthogonal frequency division multiplexing access system having multiple antennas that is capable of improving system design and realization of integration degree by reducing complexity of fast Fourier transform (FFT) and noncoherent combination is provided. The receiving apparatus of a communication system having multiple antennas includes a parallel/series converter for converting data received according to each receiving path from parallel to series data; a fast Fourier transform (FFT) unit for fast Fourier transforming the data converted from parallel to series data; a series/parallel converter for converting the fast Fourier transformed series data from series to parallel data; a series noncoherent combiner for noncoherently combining the fast Fourier transformed series data and outputting the noncoherent combined data; a channel estimator/compensator for channel-estimating/compensating the data converted to parallel according to respective receiving paths; and a coherent combiner for coherently combining the channel-estimated/compensated data and for outputting the coherent combined data.

Abstract translation: 提供了具有多个天线的正交频分复用接入系统的接收方法和装置，其能够通过降低快速傅里叶变换（FFT）和非相干组合的复杂度来改善系统设计和集成度的实现。 具有多个天线的通信系统的接收装置包括用于将根据每个接收路径接收的数据从并行转换为串行数据的并行/串联转换器; 快速傅立叶变换（FFT）单元，用于将从并行转换的数据快速傅里叶变换成串行数据; 用于将快速傅里叶变换的串行数据从串行数据转换为并行数据的串/并行转换器; 一种用于非相干组合快速傅立叶变换序列数据并输出非相干组合数据的串联非相干组合器; 信道估计/补偿器，用于根据各个接收路径对被转换为并行的数据进行信道估计/补偿; 以及用于相干地组合信道估计/补偿数据并输出相干组合数据的相干组合器。

公开(公告)号：US20090157787A1

公开(公告)日：2009-06-18

申请号：US12165209

申请日：2008-06-30

Applicant: Young Ha LEE ,  Seung Jae BAHNG ,  Youn-Ok PARK

Inventor： Young Ha LEE ,  Seung Jae BAHNG ,  Youn-Ok PARK

IPC: G06F17/16

CPC classification number: G06F17/16

Abstract: Disclosed are a row-vector norm comparison method and a row-vector norm comparison apparatus for an inverse matrix. A row-vector norm comparison apparatus includes: an input matrix processing module that receives and combines constituent elements of a matrix; a cofactor operation module that multiplexes the combination result of the constituent elements to calculate factors constituting an adjoint matrix; a square calculation module that squares the calculated factors; a summation module that selects a predetermined number of factors among the squared factors and sums the selected factors to calculate the norms of row vectors in an inverse matrix; and a norm comparison module that outputs a comparison result of the calculated norms of the row vectors. A row-vector norm comparison method includes: combining constituent elements of a matrix to generates a plurality of combination results of the constituent elements; multiplexing the combination results to calculate factors constituting an adjoint matrix of the matrix; squaring the calculated factors and selectively summing the squared factors; and calculating the norms of row vectors in an inverse matrix and comparing the calculated norms of the row vectors. With this configuration, row-vector norm comparison for an inverse matrix can be performed with a design structure. Therefore, it is not necessary to use an existing complex operation method. In addition, low power consumption of the multiple antenna system can be achieved, and efficiency of the design structure can be improved.

Abstract translation: 公开了用于逆矩阵的行向量范数比较方法和行向量范数比较装置。 行向量范数比较装置包括：输入矩阵处理模块，其接收并组合矩阵的组成元素; 辅助因子操作模块，其将所述组成元素的组合结果复用以计算构成伴随矩阵的因子; 平方计算模块，对计算的因子进行平方; 求和模块，其选择平方因子中的预定数量的因子，并且对所选择的因子进行求和以计算逆向矩阵中的行向量的范数; 以及范数比较模块，其输出所计算的行向量范围的比较结果。 行向量范数比较方法包括：组合矩阵的组成元素以生成组成元素的多个组合结果; 将组合结果复用以计算构成矩阵的伴随矩阵的因子; 平均计算因子并选择性求和平方因子; 以及计算逆矩阵中的行向量的范数并比较所计算的行向量的范数。 利用这种配置，可以用设计结构来执行逆矩阵的行向量范数比较。 因此，不需要使用现有的复杂操作方法。 此外，可以实现多天线系统的低功耗，并且可以提高设计结构的效率。

公开(公告)号：US20080310318A1

公开(公告)日：2008-12-18

申请号：US12094897

申请日：2006-12-08

Applicant: Young-Jo Bang ,  Youn-Ok Park ,  Yong-Su Lee

Inventor： Young-Jo Bang ,  Youn-Ok Park ,  Yong-Su Lee

IPC: H04L12/26

CPC classification number: H04W24/00 ,  H04B17/12 ,  H04W24/08 ,  H04W88/08

Abstract: In a signal monitoring apparatus of a base station of a communication system having multiple antennas, a transmitting/receiving unit transmits a plurality of transmit signals by using the multiple antennas or processes a plurality of receive signals received through the multiple antennas. A radio frequency calibration unit calibrates the transmit signals transmitted through the multiple antennas, and processes at least one target transmit signal among the plurality of transmit signals so as to monitor the at least one target transmit signal. A signal monitoring unit receives at least one first signal or at least one second signal, and transmits the at least one first signal or the at least one second signal to user equipment. The at least one first signal is a signal processed from at least one target receive signal among the plurality of receive signals, and the at least one second signal is a signal processed from the at least one target transmit signal by controlling the radio frequency calibration unit.

Abstract translation: 在具有多个天线的通信系统的基站的信号监视装置中，发送/接收单元通过使用多个天线发送多个发送信号，或处理通过多个天线接收的多个接收信号。 射频校准单元校准通过多个天线发射的发射信号，并处理多个发射信号中的至少一个目标发射信号，以便监测至少一个目标发射信号。 信号监测单元接收至少一个第一信号或至少一个第二信号，并将所述至少一个第一信号或至少一个第二信号发送给用户设备。 所述至少一个第一信号是从所述多个接收信号中的至少一个目标接收信号处理的信号，并且所述至少一个第二信号是通过控制所述射频校准单元从所述至少一个目标发射信号处理的信号 。

公开(公告)号：US20080305804A1

公开(公告)日：2008-12-11

申请号：US12094763

申请日：2006-12-08

Applicant: Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park

Inventor： Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park

IPC: H04Q7/20 ,  H04M1/00

CPC classification number: H04L27/2655 ,  H04L27/2646

Abstract: When a base station of a time division duplex based mobile communication system receives an initial ranging request signal from a subscriber station, the base station generates initial ranging information including delay time information to the subscriber station, and receives uplink data delayed and transmitted using a delay time from the subscriber station. Also, when the subscriber station transmits an initial ranging request signal to the base station and receives initial ranging information including delay time information from the base station, the subscriber station establishes a transmission parameter value by using the transmission parameter value included in the initial ranging information and transmits uplink data by using the established delay time.

Abstract translation: 当基于时分双工的移动通信系统的基站从用户站接收到初始测距请求信号时，基站向用户站生成包括延迟时间信息的初始测距信息，并且接收延迟并使用延迟发送的上行链路数据 来自用户站的时间。 此外，当用户台向基站发送初始测距请求信号并从基站接收包括延迟时间信息的初始测距信息时，用户台通过使用包含在初始测距信息中的传输参数值来建立传输参数值 并通过使用建立的延迟时间来发送上行链路数据。

公开(公告)号：US20080140747A1

公开(公告)日：2008-06-12

申请号：US11862055

申请日：2007-09-26

Applicant: Young-Ha LEE ,  Youn-Ok PARK

Inventor： Young-Ha LEE ,  Youn-Ok PARK

IPC: G06F17/14

CPC classification number: G06F17/142

Abstract: The present invention relates to a complex multiplier and a twiddle factor generator. The complex multiplier according to an embodiment of the invention includes: a first adder/subtracter that adds the real part of the complex number and a first twiddle factor or subtracts the first twiddle factor from the real part of the complex number according to a first signal; a second adder/subtracter that adds the imaginary part of the complex number and a second twiddle factor or subtracts the second twiddle factor from the imaginary part of the complex number according to a second signal; a first multiplier that multiplies the value obtained by the first adder/subtracter by a third twiddle factor and outputs the resulting value; a second multiplier that multiplies the value obtained by the second adder/subtracter by a fourth twiddle factor and outputs the resulting value; a multiplexer that selectively outputs the values output from the first and second multipliers as a real part output signal and an imaginary part output signal according to a third signal; and a controller that provides the first to third signals. According to the present invention, it is possible to achieve a complex multiplier having a simple hardware design.

Abstract translation: 本发明涉及复数乘法器和旋转因子发生器。 根据本发明的实施例的复数乘法器包括：第一加法器/减法器，其将复数的实部和第一旋转因子相加，或者根据第一信号从复数的实部中减去第一旋转因子 ; 第二加法器/减法器，其将复数的虚部和第二旋转因子相加，或者根据第二信号从复数的虚部中减去第二旋转因子; 第一乘法器，将由第一加法器/减法器获得的值乘以第三旋转因数，并输出所得到的值; 第二乘法器，将由第二加法器/减法器获得的值乘以第四旋转因子，并输出所得到的值; 多路复用器，根据第三信号有选择地输出从第一和第二乘法器输出的值作为实部输出信号和虚部输出信号; 以及提供第一至第三信号的控制器。 根据本发明，可以实现具有简单的硬件设计的复数乘法器。