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1. 发明申请

US20080137781A1 METHOD OF DETECTING SPACE-TIME CODE IN MOBILE COMMUNICATION SYSTEM WITH 4 Tx ANTENNA 有权
标题翻译：使用4个Tx天线检测移动通信系统中的时间码的方法
公开(公告)号：US20080137781A1
公开(公告)日：2008-06-12
申请号：US11930013
申请日：2007-10-30
申请人： Young-Jo Bang , Chang-Wahn Yu , Seung-Jae Bahng , Dae-Ho Kim , Youn-Ok Park , Jee-Hwan Ahn , Il Min Kim
发明人： Young-Jo Bang , Chang-Wahn Yu , Seung-Jae Bahng , Dae-Ho Kim , Youn-Ok Park , Jee-Hwan Ahn , Il Min Kim
IPC分类号： H04L27/06
CPC分类号： H04L25/03242 , H04L1/0631
摘要： The present invention relates to a method of detecting a space-time code in a mobile communication system. When detecting a space-time code B for a plurality of transmitting antennas, an ML (maximum likelihood) metric, which is generally calculated by using a specific structure of a matrix B, is defined as a new ML metric by reducing a variable of the ML metric. Two dependent sphere decoding processes are performed and an intersection of the decoding results is calculated, and a signal is detected from the ML metric. Therefore, since detection of the space-time code B for the plurality of transmitting antennas is performed by using the newly defined ML metric, an amount of matrix calculated can be reduced, and a calculation amount can be reduced by performing the two dependent sphere decoding processes. Further, since a detection order of symbols is changed according to a channel situation, it is possible to improve the performance of the system.
摘要翻译：本发明涉及一种在移动通信系统中检测时空码的方法。当检测到多个发射天线的时空码B时，通常通过使用矩阵B的特定结构计算的ML（最大似然度）度量被定义为新的ML度量，通过减少 ML度量。执行两个相关球体解码处理，并且计算解码结果的交点，并且从ML度量检测信号。因此，由于通过使用新定义的ML度量来执行多个发送天线的空时码B的检测，所以可以减少计算出的矩阵的量，并且可以通过执行两个相关球体解码来减少计算量过程。此外，由于符号的检测顺序根据通道情况而改变，因此可以提高系统的性能。

2. 发明授权

US07899138B2 Method of detecting space-time code in mobile communication system with 4 Tx antenna 有权
标题翻译：用4个Tx天线检测移动通信系统中的时空码的方法
公开(公告)号：US07899138B2
公开(公告)日：2011-03-01
申请号：US11930013
申请日：2007-10-30
申请人： Young-Jo Bang , Chang-Wahn Yu , Seung-Jae Bahng , Dae-Ho Kim , Youn-Ok Park , Jee-Hwan Ahn , II Min Kim
发明人： Young-Jo Bang , Chang-Wahn Yu , Seung-Jae Bahng , Dae-Ho Kim , Youn-Ok Park , Jee-Hwan Ahn , II Min Kim
IPC分类号： H04L27/06 , H03D1/00
CPC分类号： H04L25/03242 , H04L1/0631
摘要： The present invention relates to a method of detecting a space-time code in a mobile communication system. When detecting a space-time code B for a plurality of transmitting antennas, an ML (maximum likelihood) metric, which is generally calculated by using a specific structure of a matrix B, is defined as a new ML metric by reducing a variable of the ML metric. Two dependent sphere decoding processes are performed and an intersection of the decoding results is calculated, and a signal is detected from the ML metric. Therefore, since detection of the space-time code B for the plurality of transmitting antennas is performed by using the newly defined ML metric, an amount of matrix calculated can be reduced, and a calculation amount can be reduced by performing the two dependent sphere decoding processes. Further, since a detection order of symbols is changed according to a channel situation, it is possible to improve the performance of the system.
摘要翻译：本发明涉及一种在移动通信系统中检测时空码的方法。当检测到多个发射天线的时空码B时，通常通过使用矩阵B的特定结构计算的ML（最大似然度）度量被定义为新的ML度量，通过减少 ML度量。执行两个相关球体解码处理，并且计算解码结果的交点，并且从ML度量检测信号。因此，由于通过使用新定义的ML度量来执行多个发送天线的空时码B的检测，所以可以减少计算出的矩阵的量，并且可以通过执行两个相关球体解码来减少计算量过程。此外，由于符号的检测顺序根据通道情况而改变，因此可以提高系统的性能。

3. 发明授权

US07302022B2 Automatic gain control device and method in orthogonal frequency division multiplexing system with DC offset compensation function, and recording medium storing program containing the method 有权
标题翻译：具有DC偏移补偿功能的正交频分复用系统中的自动增益控制装置和方法，以及包含该方法的记录介质存储程序
公开(公告)号：US07302022B2
公开(公告)日：2007-11-27
申请号：US10687355
申请日：2003-10-15
申请人： Jun-Woo Kim , Young-Ha Lee , Chang-Wahn Yu , Dae-Ho Kim , Youn-Ok Park
发明人： Jun-Woo Kim , Young-Ha Lee , Chang-Wahn Yu , Dae-Ho Kim , Youn-Ok Park
IPC分类号： H04L27/08
CPC分类号： H04L27/261 , H03G3/3089
摘要： Disclosed is an AGC (automatic gain control) device and method of an OFDM system with a DC offset compensation function, and a recording medium storing a program including the method. The AGC device calculates an energy of input signals with DC offsets as the summation of the square of the input signals, and calculates an energy of the DC offsets in the input signals as the summation of the square of the DC offsets. Pure signal energy without DC offsets is produced by subtracting the energy of the DC offsets from the energy of the calculated input signal. The energy and an AGC reference value are then compared, and feedback of a comparison result is performed.
摘要翻译：公开了具有DC偏移补偿功能的OFDM系统的AGC（自动增益控制）装置和方法，以及存储包括该方法的程序的记录介质。 AGC装置使用DC偏移量计算输入信号的能量作为输入信号的平方的总和，并且计算输入信号中的DC偏移的能量作为DC偏移的平方的总和。没有DC偏移的纯信号能量通过从计算的输入信号的能量中减去DC偏移的能量来产生。然后比较能量和AGC参考值，并执行比较结果的反馈。

4. 发明授权

US07126925B2 Apparatus and method for multi-path search using dual code generators 失效
公开(公告)号：US07126925B2
公开(公告)日：2006-10-24
申请号：US10184107
申请日：2002-06-28
申请人： Dae-Ho Kim , Chang-Wahn Yu , Kyung-Hi Chang
发明人： Dae-Ho Kim , Chang-Wahn Yu , Kyung-Hi Chang
IPC分类号： H04B7/216
CPC分类号： H04B1/7113 , H04B1/7117 , H04B2201/70707
摘要： An apparatus for multi-path search using a dual code generator includes: first and second code generators for generating first and second search codes, changing phases, and generating a search-done interrupt; a multi-path search engine for receiving the search codes from the code generators and performing a search process for detection of the multiple paths; a search controller for controlling the code generators to generate the search codes, and sending the search-done interrupt from the code generators; and a drive controller for generating a slewing command to the search paths and a search command, sending the commands to the search controller, reading search results from the search controller upon generation of the search-done interrupt, and generating second slewing and search commands for a new search process.

5. 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。

6. 发明申请

US20080287078A1 Terminal and Method for Controlling Transmission Power 有权
标题翻译：终端和控制传输功率的方法
公开(公告)号：US20080287078A1
公开(公告)日：2008-11-20
申请号：US12095275
申请日：2006-12-08
申请人： Dae-Ho Kim , Jun-Woo Kim , Kyung-Yeol Sohn , Hyeong-Sook Park , Youn-Ok Park
发明人： Dae-Ho Kim , Jun-Woo Kim , Kyung-Yeol Sohn , Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H04B1/16
CPC分类号： H04W52/10 , H04L27/2601 , H04W52/245 , H04W52/52
摘要： A terminal of a communication system includes a power amplifier, an open-loop power controller, a gain controller, a modulator, and a digital/analog converter. The power amplifier amplifies transmission power of a transmission signal. The open-loop power controller measures a received signal strength to control the transmission power, and increases a gain of the power amplifier according to the received signal strength. The gain controller sets a power concentration gain and applies the power concentration gain to the transmission signal when the gain of the power amplifier is maximized. The modulator modulates the transmission signal. The digital/analog converter converts an input signal to an analog signal. The gain controller applies the power concentration gain to the trans mission signal modulated by the modulator, and transmits the power concentration gain to the digital/analog converter.
摘要翻译：通信系统的终端包括功率放大器，开环功率控制器，增益控制器，调制器和数/模转换器。功率放大器放大发送信号的发送功率。开环功率控制器测量接收信号强度以控制发射功率，并根据接收信号强度增加功率放大器的增益。增益控制器设置功率集中增益，当功率放大器的增益最大化时，将功率集中增益应用于传输信号。调制器调制发送信号。数字/模拟转换器将输入信号转换为模拟信号。增益控制器将功率集中增益应用于由调制器调制的传输信号，并将功率集中增益传输到数/模转换器。

7. 发明授权

US07970363B2 Terminal and method for controlling transmission power 有权
标题翻译：终端和控制传输功率的方法
公开(公告)号：US07970363B2
公开(公告)日：2011-06-28
申请号：US12095275
申请日：2006-12-08
申请人： Dae-Ho Kim , Jun-Woo Kim , Kyung-Yeol Sohn , Hyeong-Sook Park , Youn-Ok Park
发明人： Dae-Ho Kim , Jun-Woo Kim , Kyung-Yeol Sohn , Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H01Q11/12 , H04K3/00
CPC分类号： H04W52/10 , H04L27/2601 , H04W52/245 , H04W52/52
摘要： A terminal of a communication system includes a power amplifier, an open-loop power controller, a gain controller, a modulator, and a digital/analog converter. The power amplifier amplifies transmission power of a transmission signal. The open-loop power controller measures a received signal strength to control the transmission power, and increases a gain of the power amplifier according to the received signal strength. The gain controller sets a power concentration gain and applies the power concentration gain to the transmission signal when the gain of the power amplifier is maximized. The modulator modulates the transmission signal. The digital/analog converter converts an input signal to an analog signal. The gain controller applies the power concentration gain to the trans mission signal modulated by the modulator, and transmits the power concentration gain to the digital/analog converter.
摘要翻译：通信系统的终端包括功率放大器，开环功率控制器，增益控制器，调制器和数/模转换器。功率放大器放大发送信号的发送功率。开环功率控制器测量接收信号强度以控制发射功率，并根据接收信号强度增加功率放大器的增益。增益控制器设置功率集中增益，并且当功率放大器的增益最大化时，将功率集中增益应用于传输信号。调制器调制发送信号。数字/模拟转换器将输入信号转换为模拟信号。增益控制器将功率集中增益应用于由调制器调制的传输信号，并将功率集中增益传输到数/模转换器。

8. 发明授权

US07929621B2 Terminal demodulation apparatus and method 有权
标题翻译：终端解调装置及方法
公开(公告)号：US07929621B2
公开(公告)日：2011-04-19
申请号：US11636815
申请日：2006-12-11
申请人： Jun-Woo Kim , Jae-Gun Jung , Dae-Ho Kim , Hyeong-Sook Park , Youn-Ok Park
发明人： Jun-Woo Kim , Jae-Gun Jung , Dae-Ho Kim , Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2608 , H04L25/03866 , H04L27/2647
摘要： A terminal demodulation apparatus previously stores a received frame signal in a memory before inputting the same into a fast Fourier transform (FFT) unit, performs a demodulation to necessary information read from the corresponding memory, and has a separate data subcarrier memory and pilot subcarrier memory, and uses the signal demodulation method mixed with a subcarrier allocation method so as to easily demodulate various subcarrier allocation methods.
摘要翻译：终端解调装置预先将存储器中的接收帧信号存储在存储器中，并将其输入到快速傅里叶变换（FFT）单元中，对从相应的存储器读取的必要信息进行解调，并具有单独的数据副载波存储器和导频副载波存储器并且使用与子载波分配方法混合的信号解调方法，以便容易地解调各种副载波分配方法。

9. 发明授权

US07826543B2 Mobile station in orthogonal frequency division multiplexing access system and transmit power control method thereof 有权
标题翻译：正交频分复用接入系统中的移动台及其发射功率控制方法
公开(公告)号：US07826543B2
公开(公告)日：2010-11-02
申请号：US11793160
申请日：2005-09-08
申请人： Dae-Ho Kim , Youn-Ok Park
发明人： Dae-Ho Kim , Youn-Ok Park
IPC分类号： H04L27/28 , H04B1/04
CPC分类号： H04W52/10 , H04L27/2626 , H04W52/08 , H04W52/146 , H04W52/245 , H04W52/246 , H04W52/52
摘要： The present invention relates to a mobile station of an OFDMA system and a transmit power control method thereof. The mobile station includes a modulator, a variable gain amplifier, a gain controller, and a power controller. The modulator modulates transmit data according to the number of allocated subchannels, and the variable gain amplifier amplifies the transmit data. The gain controller controls a gain of the transmit data inputted to the variable gain amplifier according to a subchannel gain value corresponding to the number of subchannels. The power controller calculates a power control gain for controlling power of the transmit data except the subchannel gain value based on the signal received from the base station and outputs the power control gain to the variable gain amplifier.
摘要翻译：本发明涉及OFDMA系统的移动台及其发射功率控制方法。移动台包括调制器，可变增益放大器，增益控制器和功率控制器。调制器根据分配的子信道的数量调制发送数据，可变增益放大器放大发送数据。增益控制器根据对应于子通道数量的子通道增益值来控制输入到可变增益放大器的发送数据的增益。功率控制器基于从基站接收的信号计算用于控制除了子信道增益值之外的发送数据的功率的功率控制增益，并将功率控制增益输出到可变增益放大器。

10. 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。

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