专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 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。

2. 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。

3. 发明申请

US20090135964A1 METHOD OF CALCULATING LOG-LIKELIHOOD RATIO AND METHOD OF DETECTING TRANSMISSION SIGNAL 有权
标题翻译：计算日志比例的方法和检测传输信号的方法
公开(公告)号：US20090135964A1
公开(公告)日：2009-05-28
申请号：US12141382
申请日：2008-06-18
申请人： Seung Jae Bahng , Jae Kwon Kim , Hoon Heo , Hyun Myung Wu , Youn Ok Park , Dae Ho Kim , Kyung Yeol Sohn , Chang Wahn Yu , Jun-Woo Kim , Eon Young Hong
发明人： Seung Jae Bahng , Jae Kwon Kim , Hoon Heo , Hyun Myung Wu , Youn Ok Park , Dae Ho Kim , Kyung Yeol Sohn , Chang Wahn Yu , Jun-Woo Kim , Eon Young Hong
IPC分类号： H03D1/00
CPC分类号： H04L1/0054
摘要： The present invention relates to a method of calculating a log-likelihood ratio and a method of detecting a transmission signal. According to the present invention, when a transmission symbol candidate vector is detected on the basis of a received signal, a threshold value and an ML metric of each transmission symbol candidate vector are calculated and the ML metric that is larger than the threshold value is updated by the threshold value. Further, a log-likelihood ratio of the transmission signal bit is calculated using the updated ML metric and the threshold value, and a transmission signal is detected using the log-likelihood ratio.
摘要翻译：本发明涉及计算对数似然比的方法和检测发送信号的方法。根据本发明，当基于接收信号检测到发送符号候选向量时，计算每个发送符号候选向量的阈值和ML度量，并且更新大于阈值的ML度量通过阈值。此外，使用更新的ML度量和阈值来计算发送信号比特的对数似然比，并且使用对数似然比来检测发送信号。

4. 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。

5. 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。

6. 发明授权

US07646749B2 Downlink beamforming apparatus in OFDMA system and transmission apparatus including the same 有权
标题翻译： OFDMA系统中的下行波束成形装置及包括该下行链路波束成形装置的发送装置
公开(公告)号：US07646749B2
公开(公告)日：2010-01-12
申请号：US11636812
申请日：2006-12-11
申请人： Hyeong-Sook Park , Kyung-Yeol Sohn , Dae-Ho Kim , Jun-Woo Kim , Youn-Ok Park
发明人： Hyeong-Sook Park , Kyung-Yeol Sohn , Dae-Ho Kim , Jun-Woo Kim , Youn-Ok Park
IPC分类号： H04Q7/00
CPC分类号： H04B7/0617 , H04L5/023 , H04L27/2608 , Y02D70/142 , Y02D70/444
摘要： A downlink beamforming apparatus and a transmission apparatus including the same includes a subcarrier based user identifier for dividing subcarriers according to users, a beamforming weight buffer for storing first beamforming weights for the subcarriers by each of transmitting antennas, an interpolator for outputting second beamforming weights for each transmitting antenna by interpolating the first beamforming weights, and a signal reproducer for reproducing the signal for each transmitting antenna. Subcarriers are allocated to the signal by each user; and a complex multiplier multiplies the signal for each transmitting antenna by the second beamforming weights.
摘要翻译：下行链路波束成形装置及其发送装置包括：用于根据用户分割子载波的基于子载波的用户标识符;波束形成权重缓冲器，用于存储每个发送天线的子载波的第一波束形成权重;内插器，用于输出第二波束形成权重通过内插第一波束形成权重的每个发射天线，以及用于再现每个发射天线的信号的信号再现器。子载波由每个用户分配给信号; 并且复数乘法器将每个发射天线的信号乘以第二波束形成权重。

7. 发明申请

US20070135052A1 Downlink beamforming apparatus in OFDMA system and transmission apparatus including the same 有权
标题翻译： OFDMA系统中的下行波束成形装置及包括该下行链路波束成形装置的发送装置
公开(公告)号：US20070135052A1
公开(公告)日：2007-06-14
申请号：US11636812
申请日：2006-12-11
申请人： Hyeong-Sook Park , Kyung-Yeol Sohn , Dae-Ho Kim , Jun-Woo Kim , Youn-Ok Park
发明人： Hyeong-Sook Park , Kyung-Yeol Sohn , Dae-Ho Kim , Jun-Woo Kim , Youn-Ok Park
IPC分类号： H04B1/00
CPC分类号： H04B7/0617 , H04L5/023 , H04L27/2608 , Y02D70/142 , Y02D70/444
摘要： A downlink beamforming apparatus and a transmission apparatus including the same includes a subcarrier based user identifier for dividing subcarriers according to users, a beamforming weight buffer for storing first beamforming weights for the subcarriers by each of transmitting antennas, an interpolator for outputting second beamforming weights for each transmitting antenna by interpolating the first beamforming weights, and a signal reproducer for reproducing the signal for each transmitting antenna. Subcarriers are allocated to the signal by each user; and a complex multiplier multiplies the signal for each transmitting antenna by the second beamforming weights.
摘要翻译：下行链路波束成形装置及其发送装置包括：用于根据用户分割子载波的基于子载波的用户标识符;波束形成权重缓冲器，用于存储每个发送天线的子载波的第一波束形成权重;内插器，用于输出第二波束形成权重通过内插第一波束形成权重的每个发射天线，以及用于再现每个发射天线的信号的信号再现器。子载波由每个用户分配给信号; 并且复数乘法器将每个发射天线的信号乘以第二波束形成权重。

8. 发明授权

US08718153B2 Signal transmitting apparatus, method thereof, and inverse fast fourier transform apparatus for signal transmitting apparatus 有权
标题翻译：信号发送装置及其方法以及用于信号发送装置的快速傅立叶变换装置
公开(公告)号：US08718153B2
公开(公告)日：2014-05-06
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： H04K1/10 , 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。

9. 发明授权

US08036322B2 Method of calculating log-likelihood ratio and method of detecting transmission signal 有权
标题翻译：计算对数似然比的方法和检测传输信号的方法
公开(公告)号：US08036322B2
公开(公告)日：2011-10-11
申请号：US12141382
申请日：2008-06-18
申请人： Seung Jae Bahng , Jae Kwon Kim , Hoon Heo , Hyun Myung Wu , Youn-Ok Park , Dae Ho Kim , Kyung Yeol Sohn , Chang Wahn Yu , Jun-Woo Kim , Eon Young Hong
发明人： Seung Jae Bahng , Jae Kwon Kim , Hoon Heo , Hyun Myung Wu , Youn-Ok Park , Dae Ho Kim , Kyung Yeol Sohn , Chang Wahn Yu , Jun-Woo Kim , Eon Young Hong
IPC分类号： H04L27/06
CPC分类号： H04L1/0054
摘要： The present invention relates to a method of calculating a log-likelihood ratio and a method of detecting a transmission signal. According to the present invention, when a transmission symbol candidate vector is detected on the basis of a received signal, a threshold value and an ML metric of each transmission symbol candidate vector are calculated and the ML metric that is larger than the threshold value is updated by the threshold value. Further, a log-likelihood ratio of the transmission signal bit is calculated using the updated ML metric and the threshold value, and a transmission signal is detected using the log-likelihood ratio.
摘要翻译：本发明涉及计算对数似然比的方法和检测发送信号的方法。根据本发明，当基于接收信号检测到发送符号候选向量时，计算每个发送符号候选向量的阈值和ML度量，并且更新大于阈值的ML度量通过阈值。此外，使用更新的ML度量和阈值来计算发送信号比特的对数似然比，并且使用对数似然比来检测发送信号。

10. 发明授权

US07953165B2 Transmitting apparatus in orthogonal frequency division multiplexing access system capable of controlling gain for variation of sub-channel allocation and method for transmitting data thereof 有权
标题翻译：能够控制用于子信道分配变化的增益的正交频分复用接入系统中的发送装置及其发送数据的方法
公开(公告)号：US07953165B2
公开(公告)日：2011-05-31
申请号：US11667938
申请日：2005-09-07
申请人： Dae-Ho Kim , Jun-Woo Kim , Youn-Ok Park
发明人： Dae-Ho Kim , Jun-Woo Kim , Youn-Ok Park
IPC分类号： H04K1/10 , H04L27/28 , H04L27/00
CPC分类号： H04L27/2626 , H04L5/023
摘要： The present invention relates to a transmitter of an OFDMA system capable of controlling a gain for variation of subchannel allocation, and a method thereof. The transmitter includes a subchannel number determining unit, a modulator, a digital/analogue converter, and a gain controller controlling the gain. The subchannel number determining unit determines the number of subchannels in use according to communication environments, and the modulator modulates transmission data with reference to the number of subchannels determined by the subchannel number determining unit and outputs the modulated transmission data. The digital/analogue converter converts the transmission data into analogue data and transmits the converted analogue data through a transmit antenna. The gain controller controls gains of the transmission data according to gain values corresponding to the number of subchannels.
摘要翻译：本发明涉及能够控制用于子信道分配变化的增益的OFDMA系统的发射机及其方法。发射机包括子信道号确定单元，调制器，数/模转换器和控制增益的增益控制器。子信道号确定单元根据通信环境确定正在使用的子信道的数量，并且调制器参照由子信道号确定单元确定的子信道的数量来调制发送数据，并输出调制的发送数据。数字/模拟转换器将传输数据转换为模拟数据，并通过发送天线发送转换的模拟数据。增益控制器根据对应于子信道数量的增益值控制传输数据的增益。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式