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1. 发明授权

US07746966B2 Method for automatic gain control before initial synchronization in OFDM system and apparatus thereof 有权
标题翻译： OFDM系统中的初始同步之前的自动增益控制方法及其装置
公开(公告)号：US07746966B2
公开(公告)日：2010-06-29
申请号：US11791442
申请日：2005-06-24
申请人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Young-Jo Bang
发明人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Young-Jo Bang
IPC分类号： H04L27/08
CPC分类号： H03G3/3078 , H04L27/2647 , H04L27/2662
摘要： 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.
摘要翻译：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。

2. 发明申请

US20080056394A1 Method for Automatic Gain Control Before Initial Synchronization in Ofdm System and Apparatus Thereof 有权
标题翻译： Ofdm系统初始同步之前的自动增益控制方法及其设备
公开(公告)号：US20080056394A1
公开(公告)日：2008-03-06
申请号：US11791442
申请日：2005-06-24
申请人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Young-Jo Bang
发明人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Young-Jo Bang
IPC分类号： H04L27/08 , H04L27/28
CPC分类号： H03G3/3078 , H04L27/2647 , H04L27/2662
摘要： 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.
摘要翻译：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，其验证输入块的初始同步样本（k）信号已被执行; 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。

3. 发明授权

US08559566B2 Method and apparatus for decomposing received symbol signal modulated with bit reflected gray code in bit information 有权
标题翻译：用于在位信息中分解用位反射灰度码调制的接收符号信号的方法和装置
公开(公告)号：US08559566B2
公开(公告)日：2013-10-15
申请号：US12734984
申请日：2008-09-01
申请人： Chang Wahn Yu , Dong Weon Yoon , Kwang Min Hyun , Youn Ok Park , Dae Ho Kim , Jun-Woo Kim , Hyeong Sook Park , Seung Jae Bahng , Young Jo Bang , Kyung Yeol Sohn
发明人： Chang Wahn Yu , Dong Weon Yoon , Kwang Min Hyun , Youn Ok Park , Dae Ho Kim , Jun-Woo Kim , Hyeong Sook Park , Seung Jae Bahng , Young Jo Bang , Kyung Yeol Sohn
IPC分类号： H04L27/06
CPC分类号： H04L25/067 , H04L1/005
摘要： Disclosed is a method and apparatus for composing a received symbol signal modulated with a bit reflected Gray code into bit information. According to an embodiment of the present invention, a positive integer of the received symbol signal having bits is assigned according to the Gray mapping rule, and a sign is determined. A value that is indicative of an arrangement of the bits constituting the received symbol signal is calculated. A boundary value in at least one bit group consisting of the bits constituting the received symbol signal is acquired, and a difference from an absolute value of the received symbol signal is calculated. The received symbol signal is converted into information per bit using a value of the received symbol signal based on the positive integer and the determined sign, the value that is indicative of the bit arrangement, and the difference from the absolute value. Therefore, it is possible to reduce complexity in bitwise decomposition for an iterative decoder inevitably used in a receiver.
摘要翻译：公开了一种用于将被反映格雷码的位进行调制的接收符号信号组合成比特信息的方法和装置。根据本发明的实施例，根据Gray映射规则分配具有位的接收符号信号的正整数，并且确定符号。计算表示构成接收符号信号的位的排列的值。获取由构成接收到的符号信号的比特组构成的至少一个比特组中的边界值，并且计算与接收到的符号信号的绝对值的差值。基于正整数和确定的符号，指示比特排列的值以及与绝对值的差，使用接收到的符号信号的值将接收的符号信号转换为每位的信息。因此，可以降低在接收机中不可避免地使用的迭代解码器的逐位分解的复杂度。

4. 发明申请

US20110141962A1 METHOD AND APPARATUS FOR DEMODULATING MULTICAST SIGNAL 审中-公开
标题翻译：用于解调多重信号的方法和装置
公开(公告)号：US20110141962A1
公开(公告)日：2011-06-16
申请号：US12868164
申请日：2010-08-25
申请人： Jun-Woo Kim , Young Jo Bang , Youn Ok Park
发明人： Jun-Woo Kim , Young Jo Bang , Youn Ok Park
IPC分类号： H04H20/71
CPC分类号： H04H20/67 , H04L27/2649 , H04L27/2656
摘要： An apparatus for demodulating signals received from a plurality of base stations including a serving base station and a neighbor base station determines start timings of a serving cell signal transmitted from the serving base station and neighbor cell signals transmitted from the neighbor base stations, and verifies whether or not the neighbor cell signals that are earlier than the serving cell signal are provided on the basis of the determined start timings. Next, the apparatus selects a section where the reception energy of the symbol has the maximum level among symbols corresponding to signals of frames corresponding to the signals, respectively, as a demodulation section, and demodulates a multicast signal including the received signals on the basis of the selected demodulation section.
摘要翻译：用于解调从包括服务基站和相邻基站的多个基站接收的信号的装置确定从服务基站发送的服务小区信号的开始定时和从邻近基站发送的相邻小区信号，并且验证是否或者不是基于所确定的开始定时来提供早于服务小区信号的相邻小区信号。接下来，该装置分别选择符号的接收能量分别与对应于信号的帧的信号相对应的符号中具有最大电平的部分作为解调部分，并且基于以下方式对包括接收信号的多播信号进行解调所选解调部分。

5. 发明授权

US10321426B2 Apparatus and method for detecting synchronization and signals using block data processing 有权
公开(公告)号：US10321426B2
公开(公告)日：2019-06-11
申请号：US12906496
申请日：2010-10-18
申请人： Chang Wahn Yu , Youn Ok Park , Chong Hyun Lee , Jun-Woo Kim , Seungjae Bahng , Byung-Han Ryu , Jung Pil Choi , Young Jo Bang
发明人： Chang Wahn Yu , Youn Ok Park , Chong Hyun Lee , Jun-Woo Kim , Seungjae Bahng , Byung-Han Ryu , Jung Pil Choi , Young Jo Bang
IPC分类号： H04J3/06 , H04W56/00
摘要： An apparatus and method for detecting synchronization and signals using block data processing in a receiving system are provided. To process an input signal, a cumulative matrix is obtained from an input vector signal for each frame generated from the signal. A primary eigenvector is extracted from the cumulative matrix, and the maximum value of a correlation vector is calculated from the extracted primary eigenvector. A time delay is detected by comparing the calculated maximum value of the correlation vector with a first threshold value, and a delay correlation vector is calculated from the detected time delay. Finally, synchronization and signals are detected by comparing the calculated delay correlation vector with a second threshold value.

6. 发明授权

US08160174B2 Signal detection method and receiver 有权
标题翻译：信号检测方法和接收机
公开(公告)号：US08160174B2
公开(公告)日：2012-04-17
申请号：US12627506
申请日：2009-11-30
申请人： Young Jo Bang , Hyeong Sook Park , Jun-Woo Kim , Kyung Yeol Sohn , Chang Wahn Yu , Youn Ok Park , Jee Hwan Ahn , Il Min Kim
发明人： 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分类号： H04B7/02 , H04L5/12 , H04L27/06
CPC分类号： H04L25/067 , H04B7/0413
摘要： 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.
摘要翻译：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。

7. 发明申请

US20110103521A1 METHOD AND APPARATUS FOR DECOMPOSING RECEIVED SYMBOL SIGNAL MODULATED WITH BIT REFLECTED GRAY CODE IN BIT INFORMATION 有权
标题翻译：用于分解接收到的符号信号的方法和装置
公开(公告)号：US20110103521A1
公开(公告)日：2011-05-05
申请号：US12734984
申请日：2008-09-01
申请人： Chang Wahn YU , Dong Weon Yoon , Kwang Min Hyun , Youn Ok Park , Dae Ho Kim , Jun-Woo Kim , Hyeong Sook Park , Seung Jae Bahng , Young Jo Bang , Kyung Yeol Sohn
发明人： Chang Wahn YU , Dong Weon Yoon , Kwang Min Hyun , Youn Ok Park , Dae Ho Kim , Jun-Woo Kim , Hyeong Sook Park , Seung Jae Bahng , Young Jo Bang , Kyung Yeol Sohn
IPC分类号： H04L27/06
CPC分类号： H04L25/067 , H04L1/005
摘要： Disclosed is a method and apparatus for composing a received symbol signal modulated with a bit reflected Gray code into bit information. According to an embodiment of the present invention, a positive integer of the received symbol signal having bits is assigned according to the Gray mapping rule, and a sign is determined. A value that is indicative of an arrangement of the bits constituting the received symbol signal is calculated. A boundary value in at least one bit group consisting of the bits constituting the received symbol signal is acquired, and a difference from an absolute value of the received symbol signal is calculated. The received symbol signal is converted into information per bit using a value of the received symbol signal based on the positive integer and the determined sign, the value that is indicative of the bit arrangement, and the difference from the absolute value. Therefore, it is possible to reduce complexity in bitwise decomposition for an iterative decoder inevitably used in a receiver.
摘要翻译：公开了一种用于将被反映格雷码的位进行调制的接收符号信号组合成比特信息的方法和装置。根据本发明的实施例，根据Gray映射规则分配具有位的接收符号信号的正整数，并且确定符号。计算表示构成接收符号信号的位的排列的值。获取由构成接收到的符号信号的比特组构成的至少一个比特组中的边界值，并且计算与接收到的符号信号的绝对值的差值。基于正整数和确定的符号，指示比特排列的值以及与绝对值的差，使用接收到的符号信号的值将接收的符号信号转换为每位的信息。因此，可以降低在接收机中不可避免地使用的迭代解码器的逐位分解的复杂度。

8. 发明申请

US20070248197A1 Automatic Gain Control Apparatus and Method in Orthogonal Frequency Division Multiplexing 有权
标题翻译：自动增益控制装置及正交频分复用方法
公开(公告)号：US20070248197A1
公开(公告)日：2007-10-25
申请号：US10583164
申请日：2004-12-17
申请人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Dae-Ho Kim
发明人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Dae-Ho Kim
IPC分类号： H04L27/08
CPC分类号： H03G3/3089 , H04L25/061 , H04L27/2647
摘要： Disclosed is an automatic gain control device in an orthogonal frequency division multiplexing system. A variable gain amplifier controls a gain of an input signal; an energy calculator calculates an energy of the input signal; a truncator accumulates the calculated energies, finds an average thereof, and generates a DC offset of the input signal; a subtracter subtracts a predefined reference value from the DC offset, and outputs a signal; and an RC filter feeds the value output by the subtracter back to the variable gain amplifier so that the value output by the subtracter may be used for an automatic gain control. The predefined reference value given to be 4.Ov is a reference power generated based on a saturation to RMS ratio for minimizing the bit error rate of the orthogonal frequency division multiplexing system.
摘要翻译：公开了一种正交频分复用系统中的自动增益控制装置。可变增益放大器控制输入信号的增益; 能量计算器计算输入信号的能量; 截断器累积计算出的能量，找到其平均值，并产生输入信号的DC偏移; 减法器从DC偏移中减去预定义的参考值，并输出信号; 并且RC滤波器将减法器输出的值馈送到可变增益放大器，使得减法器输出的值可用于自动增益控制。给定为4.0V的预定义参考值是基于用于使正交频分复用系统的误码率最小化的饱和度与RMS比率产生的参考功率。

9. 发明授权

US07782977B2 Automatic gain control apparatus and method in orthogonal frequency division multiplexing 有权
标题翻译：自动增益控制装置和方法在正交频分复用中
公开(公告)号：US07782977B2
公开(公告)日：2010-08-24
申请号：US10583164
申请日：2004-12-17
申请人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Dae-Ho Kim
发明人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Dae-Ho Kim
IPC分类号： H04K1/02
CPC分类号： H03G3/3089 , H04L25/061 , H04L27/2647
摘要： Disclosed is an automatic gain control device in an orthogonal frequency division multiplexing system. A variable gain amplifier controls a gain of an input signal; an energy calculator calculates an energy of the input signal; a truncator accumulates the calculated energies, finds an average thereof, and generates a DC offset of the input signal; a subtracter subtracts a predefined reference value from the DC offset, and outputs a signal; and an RC filter feeds the value output by the subtracter back to the variable gain amplifier so that the value output by the subtracter may be used for an automatic gain control. The predefined reference value given to be 4.Ov is a reference power generated based on a saturation to RMS ratio for minimizing the bit error rate of the orthogonal frequency division multiplexing system.
摘要翻译：公开了一种正交频分复用系统中的自动增益控制装置。可变增益放大器控制输入信号的增益; 能量计算器计算输入信号的能量; 截断器累积计算出的能量，找到其平均值，并产生输入信号的DC偏移; 减法器从DC偏移中减去预定义的参考值，并输出信号; 并且RC滤波器将减法器输出的值馈送到可变增益放大器，使得减法器输出的值可用于自动增益控制。给定为4.0V的预定义参考值是基于用于使正交频分复用系统的误码率最小化的饱和度与RMS比率产生的参考功率。

10. 发明授权

US07907686B2 Demodulating device and method in orthogonal frequency division multiple access communication system 有权
标题翻译：正交频分多址通信系统中的解调设备及方法
公开(公告)号：US07907686B2
公开(公告)日：2011-03-15
申请号：US11930029
申请日：2007-10-30
申请人： Jun-Woo Kim , Youn-Ok Park
发明人： Jun-Woo Kim , Youn-Ok Park
IPC分类号： H04L27/06
CPC分类号： H04L27/2647 , H04L1/0052 , H04L5/023
摘要： The present invention relates to a demodulating device and method in an orthogonal frequency division multiple access (OFDMA) communication system. A demodulating device according to an exemplary embodiment of the invention uses only one demodulator, one slot buffer, and one channel decoder to demodulate a plurality of data bursts included in one frame. In addition, in order to reduce a memory size required to demodulate a plurality of data bursts, a memory is managed in the units of sub-channels, instead of classifying memory cells so as to correspond to the data bursts. According to the demodulating device, it is possible to simplify a hardware structure and to reduce a memory size required to demodulate data bursts. As a result, it is possible to reduce manufacturing costs and decrease the number of signal lines of a channel decoder required for an interface.
摘要翻译：本发明涉及正交频分多址（OFDMA）通信系统中的解调装置和方法。根据本发明的示例性实施例的解调装置仅使用一个解调器，一个时隙缓冲器和一个信道解码器来解调包括在一个帧中的多个数据突发。此外，为了减少解调多个数据脉冲串所需的存储器大小，以子信道为单位来管理存储器，而不是分类存储器单元以对应于数据脉冲串。根据解调装置，可以简化硬件结构并减少解调数据脉冲串所需的存储器大小。结果，可以降低制造成本并减少接口所需的通道解码器的信号线的数量。

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