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1. 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。

2. 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。

3. 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。

4. 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。

5. 发明授权

US08184606B2 Apparatus and method for monitoring base station signal in communication system having multiple antennas 有权
标题翻译：用于监测具有多个天线的通信系统中的基站信号的装置和方法
公开(公告)号：US08184606B2
公开(公告)日：2012-05-22
申请号：US12094897
申请日：2006-12-08
申请人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
发明人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
IPC分类号： H04H20/67
CPC分类号： H04W24/00 , H04B17/12 , H04W24/08 , H04W88/08
摘要： 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.
摘要翻译：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。

6. 发明授权

US07178085B2 Encoder using low density parity check codes and encoding method thereof 失效
标题翻译：使用低密度奇偶校验码的编码器及其编码方法
公开(公告)号：US07178085B2
公开(公告)日：2007-02-13
申请号：US10535925
申请日：2003-11-21
申请人： Su-Chang Chae , Yong-Su Lee , Jung-Pil Choi , Youn-Ok Park
发明人： Su-Chang Chae , Yong-Su Lee , Jung-Pil Choi , Youn-Ok Park
IPC分类号： H03M13/00
CPC分类号： H03M13/1177 , H03M13/116 , H03M13/1182
摘要： An encoder using LDPC (low density parity check) codes, and an encoding method. The encoder comprises a parity check matrix generator for generating a parity check matrix H; and a codeword generator for processing the parity check matrix H to generate a codeword, and the codeword generator comprises: an AB analyzer for analyzing the parity check matrix H into matrixes A and B; a pivoting unit for pivoting the parity check matrix H; a bit-reversing unit for bit-reversing the pivoted matrix; an LU analyzer for analyzing the matrix A into matrixes L and U; and a codeword generator unit for performing a logical operation on the matrixes A, B, L and U. A bit-reversing method is used to effectively generate a parity check matrix having a high girth by using a regular encoder.
摘要翻译：使用LDPC（低密度奇偶校验）码的编码器，以及编码方法。编码器包括用于产生奇偶校验矩阵H的奇偶校验矩阵发生器; 以及用于处理奇偶校验矩阵H以生成码字的码字生成器，并且码字生成器包括：用于将奇偶校验矩阵H分析为矩阵A和B的AB分析器; 用于枢转奇偶校验矩阵H的枢转单元; 用于对所述枢转矩阵进行位反转的位反转单元; 用于将矩阵A分解为矩阵L和U的LU分析器; 以及用于对矩阵A，B，L和U执行逻辑运算的码字发生器单元。使用位反转方法通过使用常规编码器来有效地生成具有高周长的奇偶校验矩阵。

7. 发明授权

US08170147B2 Apparatus for cancelling DC offset and method thereof 有权
标题翻译：用于消除DC偏移的装置及其方法
公开(公告)号：US08170147B2
公开(公告)日：2012-05-01
申请号：US11721139
申请日：2005-09-06
申请人： Yong-Su Lee , Youn-Ok Park , Eon-Young Hong
发明人： Yong-Su Lee , Youn-Ok Park , Eon-Young Hong
IPC分类号： H04L25/06
CPC分类号： H04B1/7176 , H04B1/7183 , H04L25/06 , H04L27/2655
摘要： 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).
摘要翻译：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。

8. 发明授权

US07940858B2 Apparatus and method for calibration in a communication system 有权
标题翻译：通信系统中的校准装置和方法
公开(公告)号：US07940858B2
公开(公告)日：2011-05-10
申请号：US11635475
申请日：2006-12-07
申请人： Yong-Su Lee , Youn-Ok Park , Young-Jo Bang , Kyung-Yeol Sohn , Jae-Gun Jung
发明人： Yong-Su Lee , Youn-Ok Park , Young-Jo Bang , Kyung-Yeol Sohn , Jae-Gun Jung
IPC分类号： H04L27/00 , H04B7/06
CPC分类号： H01Q1/246 , H01Q3/267 , H04B17/14 , H04L27/2626
摘要： In a calibration apparatus in a communication system, a modulation unit calculates a reference signal by modulating a downlink signal, and a digital Intermediate Frequency (IF) unit converts the reference signal to an intermediate frequency signal. An up-converter converts the intermediate frequency signal to a Radio Frequency (RF) signal, and a down-converter generates a received signal for each of the paths from the RF signal to be transmitted through each path. A calibrator calculates a correction value for each path and a delay value by using the reference signal and the received signal for each path.
摘要翻译：在通信系统中的校准装置中，调制单元通过调制下行链路信号来计算参考信号，并且数字中频（IF）单元将参考信号转换为中频信号。上变频器将中频信号转换成射频（RF）信号，下变频器从RF信号中产生每个路径的接收信号，以通过每个路径传输。校准器通过使用参考信号和每个路径的接收信号来计算每个路径的校正值和延迟值。

9. 发明申请

US20100128819A1 APPARATUS FOR CANCELLING DC OFFSET AND METHOD THEREOF 有权
标题翻译：取消直流偏置的方法及其方法
公开(公告)号：US20100128819A1
公开(公告)日：2010-05-27
申请号：US11721139
申请日：2005-09-06
申请人： Yong-Su Lee , Youn-OK Park , Eon-Young Hong
发明人： Yong-Su Lee , Youn-OK Park , Eon-Young Hong
IPC分类号： H04L25/06
CPC分类号： H04B1/7176 , H04B1/7183 , H04L25/06 , H04L27/2655
摘要： 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).
摘要翻译：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。

10. 发明申请

US20080310318A1 Apparatus and Method For Monitoring Base Station Signal in Communication System Having Multiple Antennas 有权
标题翻译：用于监测具有多个天线的通信系统中的基站信号的装置和方法
公开(公告)号：US20080310318A1
公开(公告)日：2008-12-18
申请号：US12094897
申请日：2006-12-08
申请人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
发明人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
IPC分类号： H04L12/26
CPC分类号： H04W24/00 , H04B17/12 , H04W24/08 , H04W88/08
摘要： 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.
摘要翻译：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。

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