公开(公告)号：US20090060069A1

公开(公告)日：2009-03-05

申请号：US12105172

申请日：2008-04-17

申请人： Jun-Woo KIM ,  Dae-Ho KIM ,  Young-Ha LEE ,  Youn-Ok PARK

发明人： Jun-Woo KIM ,  Dae-Ho KIM ,  Young-Ha LEE ,  Youn-Ok PARK

IPC分类号： H04L27/28

CPC分类号： H04L27/2607 ,  H04L27/263

摘要： The present invention relates to a signal transmitting apparatus, a method thereof, and an inverse fast Fourier transform (IFFT) apparatus for a signal transmitting apparatus. A signal transmitting apparatus according to an embodiment of the present invention receives data, and performs inverse fast Fourier transform (IFFT) on the data on the basis of a twiddle factor for shifting output data by the size of a cyclic prefix. In addition, the signal transmitting apparatus sequentially stores data corresponding to the size of the cyclic prefix starting with initial data among the transformed data, and generates an OFDM symbol on the basis of the stored data and the transformed data. According to the embodiment of the present invention, it is possible to efficiently reduce a time delay and a memory use amount when a cyclic prefix is added at a transmitting end, without changing the size of hardware and power consumption.

摘要翻译： 信号发送装置及其方法技术领域本发明涉及信号发送装置及其方法以及信号发送装置的快速傅里叶逆变换（IFFT）装置。 根据本发明的实施例的信号发送装置接收数据，并且基于用于根据循环前缀的大小移位输出数据的旋转因子对数据进行快速傅立叶逆变换（IFFT）。 此外，信号发送装置顺序地存储与变换数据中的初始数据开始的循环前缀的大小相对应的数据，并且根据存储的数据和变换后的数据生成OFDM符号。 根据本发明的实施例，可以有效地减少在发送端添加循环前缀的时间延迟和存储器使用量，而不改变硬件和功耗的大小。

公开(公告)号：US20080119152A1

公开(公告)日：2008-05-22

申请号：US11925726

申请日：2007-10-26

申请人： Jun-Woo KIM ,  Hyeong-Sook PARK ,  Youn-Ok PARK

发明人： Jun-Woo KIM ,  Hyeong-Sook PARK ,  Youn-Ok PARK

IPC分类号： H03G3/20 ,  H04B1/06 ,  H04B7/00

CPC分类号： H03G3/3052

摘要： The present invention relates to an automatic gain control apparatus and method in a mobile communication system. According to the automatic gain control apparatus of an embodiment of the invention, when downlink signals include both directional beam signals and beam signals traveling in all directions due to the antenna system, different reception gain reference values are used according to whether downlink signals including only the beam signals traveling in all directions are received or downlink signals including the directional beam signals are received, thereby controlling the gain of the received signal. When the downlink signals including the directional beam signals are received, the automatic gain control apparatus can appropriately control the gain of the received signal on the basis of the directional beam signals to prevent saturation of the received signal. Further, in a place where the channel condition between the terminal and the base station is bad, such as the boundaries between the cells, the reception gain is controlled on the basis of the reception gain reference value that is set in correspondence with the beam signal traveling in all directions, which makes it possible to reduce the loss of a signal-to-noise ratio (SNR).

摘要翻译： 本发明涉及移动通信系统中的自动增益控制装置和方法。 根据本发明的实施例的自动增益控制装置，由于天线系统，当下行信号包括定向波束信号和波导信号在所有方向上行进时，根据是否包括仅仅 接收到在各个方向上行进的波束信号，或者接收包括定向波束信号的下行链路信号，从而控制接收信号的增益。 当接收到包括定向波束信号的下行链路信号时，自动增益控制装置可以根据定向波束信号适当地控制接收信号的增益，以防止接收信号的饱和。 此外，在终端和基站之间的信道状况（诸如小区之间的边界）不良的地方，基于与波束信号相对应地设置的接收增益参考值来控制接收增益 在各个方向上行进，从而可以减少信噪比（SNR）的损失。

公开(公告)号：US20090157787A1

公开(公告)日：2009-06-18

申请号：US12165209

申请日：2008-06-30

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

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

IPC分类号： G06F17/16

CPC分类号： G06F17/16

摘要： 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.

摘要翻译： 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：US20080140747A1

公开(公告)日：2008-06-12

申请号：US11862055

申请日：2007-09-26

申请人： Young-Ha LEE ,  Youn-Ok PARK

发明人： Young-Ha LEE ,  Youn-Ok PARK

IPC分类号： G06F17/14

CPC分类号： G06F17/142

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20080144756A1

公开(公告)日：2008-06-19

申请号：US11923622

申请日：2007-10-24

申请人： Hyeong-Sook PARK ,  Jun-Woo KIM ,  Kyung-Yeol SOHN ,  Youn-Ok PARK

发明人： Hyeong-Sook PARK ,  Jun-Woo KIM ,  Kyung-Yeol SOHN ,  Youn-Ok PARK

IPC分类号： H04L7/02

CPC分类号： H04L7/042 ,  H04B1/7075 ,  H04L27/261 ,  H04L27/2655 ,  H04L27/2675

摘要： The present invention relates to an apparatus and method of acquiring initial synchronization of a terminal in a mobile communication system. According to an exemplary embodiment of the present invention, one or more auto-correlation values of a preamble constituting a signal that is received from a base station are calculated. Averages of the calculated auto-correlation values according to samples are calculated, and then a peak value is detected among the calculated values. Then, a cell search is performed on the basis of the detected peak value, and a peak value from the result of the cell search is regularized. Then, the regularized peak value is compared with a predetermined reference value such that it is checked whether synchronization of a signal that has been searched is accurate or not. According to an exemplary embodiment of the present invention, a value obtained by regularizing a result of a cell search is compared with a reference value, and it is checked again whether an accurate start point of a frame is detected or not on the basis of a result of the comparison. Accordingly, false alarm rates can be reduced.

摘要翻译： 本发明涉及在移动通信系统中获取终端的初始同步的装置和方法。 根据本发明的示例性实施例，计算构成从基站接收的信号的前导码的一个或多个自相关值。 计算根据样本计算的自相关值的平均值，然后在计算值之间检测峰值。 然后，基于检测到的峰值执行小区搜索，并且从小区搜索结果的峰值正规化。 然后，将正则化峰值与预定参考值进行比较，以便检查已搜索的信号的同步是否准确。 根据本发明的示例性实施例，将通过对小区搜索的结果进行规则化而获得的值与参考值进行比较，并且再次检查是否基于a检测到帧的准确起点 比较结果。 因此，可以降低误报率。

公开(公告)号：US20080137768A1

公开(公告)日：2008-06-12

申请号：US11925686

申请日：2007-10-26

申请人： Hyeong-Sook PARK ,  Jun-Woo KIM ,  Kyung-Yeol SOHN ,  Youn-Ok PARK

发明人： Hyeong-Sook PARK ,  Jun-Woo KIM ,  Kyung-Yeol SOHN ,  Youn-Ok PARK

IPC分类号： H04L23/02

CPC分类号： H04L27/266 ,  H04L27/2659 ,  H04L27/2679

摘要： The present invention relates to an apparatus and method of compensating for a frequency offset in an orthogonal frequency division multiple access system that is capable of efficiently estimating and compensating for the frequency offset. A receiver of the orthogonal frequency division multiple access system can individually estimate a fractional frequency offset and an integer frequency offset by using a downlink preamble signal. Further, the receiver can compensate for the frequency offset by adding the integer frequency offset once after completely compensating for the fractional frequency offset. Therefore, it is possible to efficiently compensate for the frequency offset.

摘要翻译： 本发明涉及一种能够有效地估计和补偿频偏的正交频分多址系统中的频偏的补偿装置和方法。 正交频分多址系统的接收机可以通过使用下行链路前导码信号单独地估计分数频率偏移和整数频率偏移。 此外，接收机可以通过在完全补偿分数频率偏移之后加上整数频率偏移一次来补偿频率偏移。 因此，可以有效地补偿频率偏移。

公开(公告)号：US20080137782A1

公开(公告)日：2008-06-12

申请号：US11930047

申请日：2007-10-30

申请人： Seung-Jae BAHNG ,  Young-Jo BANG ,  Youn-Ok PARK

发明人： Seung-Jae BAHNG ,  Young-Jo BANG ,  Youn-Ok PARK

IPC分类号： H03D1/00 ,  H04L1/02

CPC分类号： H04B7/0413 ,  H04L1/0656 ,  H04L25/0204 ,  H04L25/0246

摘要： The present invention relates to a signal detection method and a receiving apparatus in a multiple input multiple output (MIMO) system. More particularly, the present invention relates to a signal detection device in a MIMO system using a spatial multiplexing (SM) method. In the signal detection method, a channel is estimated and layers are rearranged according to a predetermined layer arrangement rule. QR-decomposition is performed by using a rearranged system model, all constellation points in a symbol of a layer having the lowest reliability are considered, and symbols are detected by using a sequential interference elimination method.

摘要翻译： 本发明涉及多输入多输出（MIMO）系统中的信号检测方法和接收装置。 更具体地，本发明涉及使用空间复用（SM）方法的MIMO系统中的信号检测装置。 在信号检测方法中，估计信道并根据预定层布置规则重新布置层。 通过使用重排系统模型进行QR分解，考虑具有最低可靠性的层的符号中的所有星座点，并且通过使用顺序干扰消除方法来检测符号。

公开(公告)号：US20080137788A1

公开(公告)日：2008-06-12

申请号：US11931188

申请日：2007-10-31

申请人： Young-Jo BANG ,  Kyung-Yeol SOHN ,  Youn-Ok PARK

发明人： Young-Jo BANG ,  Kyung-Yeol SOHN ,  Youn-Ok PARK

IPC分类号： H04B1/10

CPC分类号： H04L25/0236 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0222 ,  H04L27/261

摘要： The present invention relates to an apparatus and method of estimating a channel based on a channel delay spread in a mobile communication system. Pilot subcarriers are inserted between data subcarriers at predetermined intervals to estimate a channel at locations of the pilot subcarriers. An approximate channel delay spread value is estimated by using an autocorrelation value of a pilot signal. Then, a channel for data subcarriers between the pilot subcarriers is estimated by using a Wiener finite impulse response (FIR) filter that has a separate coefficient according to the estimated delay spread value. Accordingly, by changing the Wiener FIR filter coefficient according to the delay spread value of the channel, it is possible to estimate the channel so as to be adaptive for a change of the channel over time. Since the filter coefficients, which are calculated in advance, are used, it is possible to reduce the amount of calculation required when calculating the filter coefficients. As a result, an apparatus for estimating a channel can be easily achieved.

摘要翻译： 本发明涉及一种基于移动通信系统中的信道延迟扩展来估计信道的装置和方法。 导频子载波以预定间隔插入数据子载波之间，以估计导频子载波位置处的信道。 通过使用导频信号的自相关值来估计近似信道延迟扩展值。 然后，通过使用根据估计的延迟扩展值具有单独系数的维纳有限脉冲响应（FIR）滤波器来估计导频子载波之间的数据子载波的信道。 因此，通过根据信道的延迟扩展值改变维纳FIR滤波器系数，可以估计信道，以适应随时间变化的信道。 由于使用预先计算的滤波器系数，因此可以减少计算滤波器系数时所需的计算量。 结果，可以容易地实现用于估计通道的装置。

公开(公告)号：US20080140686A1

公开(公告)日：2008-06-12

申请号：US11861884

申请日：2007-09-26

申请人： Eon-Young HONG ,  Jung-Pil CHOI ,  Youn-Ok PARK

发明人： Eon-Young HONG ,  Jung-Pil CHOI ,  Youn-Ok PARK

IPC分类号： G06F7/00

CPC分类号： H03M13/1185 ,  H03M13/6561

摘要： The present invention relates to a low density parity check (LDPC) encoding method and an apparatus thereof. In the LDPC encoding method, a matrix multiplication corresponding to ET−1 and T−1 is eliminated according to a structural characteristic in an encoding process. Accordingly, shift weights that are not −1 among shift weights corresponding to partial blocks A, B, and C of a parity check matrix are used to perform an encoding operation, and a cyclic shift operation of an information unit block is performed in parallel so that a first parity block and a second parity block may be simultaneously generated.

摘要翻译： 本发明涉及一种低密度奇偶校验（LDPC）编码方法及其装置。 在LDPC编码方法中，根据编码处理中的结构特征，消除对应于ET＆gt; -1＆gt;和＆lt; 1＆gt; -1＆gt;的矩阵乘法。 因此，使用对应于奇偶校验矩阵的部分块A，B和C的移位权重之中不为-1的移动权重进行编码操作，并行执行信息单元块的循环移位操作 可以同时生成第一奇偶校验块和第二奇偶校验块。

公开(公告)号：US20080133630A1

公开(公告)日：2008-06-05

申请号：US11925712

申请日：2007-10-26

申请人： Young-Jo BANG ,  Youn-Ok PARK

发明人： Young-Jo BANG ,  Youn-Ok PARK

IPC分类号： G06F17/17

CPC分类号： H03H17/0657 ,  H04L25/03866 ,  H04L27/2626

摘要： The present invention relates to an interpolation FIR (finite impulse response) filter having multiple data rates in a mobile communication system, and a method of filtering data using the same. In the method of filtering data using the interpolation FIR filter, a first filter uses an FIR low pass filter that restricts a band to satisfy a bandwidth corresponding to a data spectrum mask required in the mobile communication system. The other filters use interpolation FIR halfband filters that are implemented by a small number of taps. Accordingly, the interpolation FIR filter having multiple data rates can be easily implemented, and can be easily applied to the mobile communication system that transmits and receives data having various data rates.

摘要翻译： 本发明涉及移动通信系统中具有多个数据速率的内插FIR（有限脉冲响应）滤波器，以及使用该滤波器的数据过滤方法。 在使用插值FIR滤波器对数据进行滤波的方法中，第一滤波器使用FIR低通滤波器，其限制频带以满足与移动通信系统中所需的数据频谱掩模相对应的带宽。 其他滤波器使用由少量抽头实现的插值FIR半带滤波器。 因此，具有多个数据速率的插值FIR滤波器可以容易地实现，并且可以容易地应用于发送和接收具有各种数据速率的数据的移动通信系统。