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. 发明授权

US08005182B2 Apparatus and method of compensating for frequency offset in OFDMA system 有权
标题翻译：在OFDMA系统中补偿频偏的装置和方法
公开(公告)号：US08005182B2
公开(公告)日：2011-08-23
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： H03D3/24
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。

2. 发明授权

US07813435B2 Carrier allocation method in OFDM system and transmitting apparatus using the method 有权
标题翻译： OFDM系统中的载波分配方法和使用该方法的发射装置
公开(公告)号：US07813435B2
公开(公告)日：2010-10-12
申请号：US11722028
申请日：2005-05-11
申请人： Hyeong-Sook Park , Youn-Ok Park
发明人： Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H04K1/10
CPC分类号： H04L27/2608
摘要： The present invention relates to a method for allocating subcarriers in an orthogonal frequency division multiplex (OFDM) system, and a transmitter thereof. In the OFDM system according to an exemplary embodiment of the present invention, the subcarrier allocation is performed in the buffer (10) before a modulation mapping operation is performed according to a modulation method such that the delay may not be generated in the subchannel formed on the symbol axis. The delay corresponding to the symbols is prevented without using any additional hardware for eliminating the delay generated when the subcarriers are allocated to the subchannel formed on the symbol axis.
摘要翻译：本发明涉及一种用于在正交频分复用（OFDM）系统中分配子载波的方法及其发射机。在根据本发明的示例性实施例的OFDM系统中，在根据调制方法执行调制映射操作之前，在缓冲器（10）中执行子载波分配，使得可以在形成的子信道中不产生延迟符号轴。防止对应于符号的延迟，而不使用任何额外的硬件来消除当子载波被分配到在符号轴上形成的子信道时产生的延迟。

3. 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。

4. 发明申请

US20080205532A1 Carrier Allocation Method In Ofdm System And Transmittting Apparatus Using The Method 有权
标题翻译：使用该方法的OFDM系统和传送装置中的载波分配方法
公开(公告)号：US20080205532A1
公开(公告)日：2008-08-28
申请号：US11722028
申请日：2005-05-11
申请人： Hyeong-Sook Park , Youn-Ok Park
发明人： Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H04L27/28
CPC分类号： H04L27/2608
摘要： The present invention relates to a method for allocating subcarriers in an orthogonal frequency division multiplex (OFDM) system, and a transmitter thereof. In the OFDM system according to an exemplary embodiment of the present invention, the subcarrier allocation is performed in the buffer (10) before a modulation mapping operation is performed according to a modulation method such that the delay may not be generated in the subchannel formed on the symbol axis. The delay corresponding to the symbols is prevented without using any additional hardware for eliminating the delay generated when the subcarriers are allocated to the subchannel formed on the symbol axis.
摘要翻译：本发明涉及一种用于在正交频分复用（OFDM）系统中分配子载波的方法及其发射机。在根据本发明的示例性实施例的OFDM系统中，在根据调制方法执行调制映射操作之前，在缓冲器（10）中执行子载波分配，使得可以在形成的子信道中不产生延迟符号轴。防止对应于符号的延迟，而不使用任何额外的硬件来消除当子载波被分配到在符号轴上形成的子信道时产生的延迟。

5. 发明申请

US20070133460A1 Apparatus and method for processing ranging channel of communication system 有权
标题翻译：通信系统测距信道处理装置及方法
公开(公告)号：US20070133460A1
公开(公告)日：2007-06-14
申请号：US11636814
申请日：2006-12-11
申请人： Kyung-Yeol Sohn , Hyeong-Sook Park , Youn-Ok Park
发明人： Kyung-Yeol Sohn , Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H04Q7/00 , H04L12/28
CPC分类号： H04B17/318
摘要： Disclosed herein is a base station that extracts a ranging channel signal from a received signal partially correlates each of a plurality of ranging channel signals and each of ranging codes according to ranging modes, and selects a ranging channel signal greater than a first threshold value, the plurality of ranging channel signals being signals according to plurality of time delays of a ranging channel signal. In addition, the base station correlates each of the selected ranging channel signal and each of corresponding ranging code, selects a ranging channel signal having the maximum correlation value, and estimates receiving power by using a time delay corresponding to the selected ranging channel signal.
摘要翻译：本文公开了一种从接收信号中提取测距信道信号的基站，根据测距模式对多个测距信道信号和测距码中的每一个进行部分相关，并选择大于第一阈值的测距信道信号，多个测距信道信号是根据测距信道信号的多个时间延迟的信号。此外，基站将所选择的测距信道信号和每个对应的测距码相关，选择具有最大相关值的测距信道信号，并且通过使用与所选择的测距信道信号相对应的时间延迟来估计接收功率。

6. 发明授权

US08406320B2 Digital clipping method for a transmitter of an orthogonal frequency division multiple access system 有权
标题翻译：用于正交频分多址系统的发射机的数字裁剪方法
公开(公告)号：US08406320B2
公开(公告)日：2013-03-26
申请号：US11721156
申请日：2005-10-26
申请人： Hyeong-Sook Park , Youn-Ok Park
发明人： Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H04L27/28
CPC分类号： H04L27/2624
摘要： The present invention relates to a digital clipping method for reducing a high peak-to-average power ratio (PAPR) of a transmission signal in a transmitter of an orthogonal frequency division multiplexing access (OFDMA) system. In the method, a) the transmission signal to be digitally clipped is divided into real and imaginary parts, b) magnitudes of the real and imaginary part signals are divided into a plurality clipping levels, and c) the transmission signal is respectively clipped by comparing the real and imaginary part signals with the plurality of clipping levels while allowing phase errors. In c), a plurality of comparators is used to respectively compare the real and imaginary parts of the complex number transmission signal with the plurality of clipping levels.
摘要翻译：本发明涉及一种用于降低正交频分多路复用接入（OFDMA）系统的发射机中的发送信号的高峰值与平均功率比（PAPR）的数字削波方法。在该方法中，a）要被数字剪切的传输信号被划分成实部和虚部，b）实部和虚部信号的大小被分成多个削波电平，c）通过比较来分别传输发送信号具有多个限幅电平的实部和虚部信号同时允许相位误差。在c）中，使用多个比较器来分别比较复数传输信号的实部和虚部与多个限幅电平。

7. 发明申请

US20100046662A1 DIGITAL CLIPPING METHOD FOR A TRANSMITTER OF AN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM 有权
标题翻译：正交频分多址接入系统发射机的数字剪辑方法
公开(公告)号：US20100046662A1
公开(公告)日：2010-02-25
申请号：US11721156
申请日：2005-10-26
申请人： Hyeong-Sook Park , Youn-Ok Park
发明人： Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H04L27/00
CPC分类号： H04L27/2624
摘要： The present invention relates to a digital clipping method for reducing a high peak-to-average power ratio (PAPR) of a transmission signal in a transmitter of an orthogonal frequency division multiplexing access (OFDMA) system. In the method, a) the transmission signal to be digitally clipped is divided into real and imaginary parts, b) magnitudes of the real and imaginary part signals are divided into a plurality clipping levels, and c) the transmission signal is respectively clipped by comparing the real and imaginary part signals with the plurality of clipping levels while allowing phase errors. In c), a plurality of comparators is used to respectively compare the real and imaginary parts of the complex number transmission signal with the plurality of clipping levels.
摘要翻译：本发明涉及一种用于降低正交频分多路复用接入（OFDMA）系统的发射机中的发送信号的高峰值与平均功率比（PAPR）的数字削波方法。在该方法中，a）要被数字剪切的传输信号被划分成实部和虚部，b）实部和虚部信号的大小被分成多个削波电平，c）通过比较来分别传输发送信号具有多个限幅电平的实部和虚部信号同时允许相位误差。在c）中，使用多个比较器来分别比较复数传输信号的实部和虚部与多个限幅电平。

8. 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。

9. 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。

10. 发明授权

US08199738B2 Apparatus and method for processing ranging channel of communication system 有权
标题翻译：通信系统测距信道处理装置及方法
公开(公告)号：US08199738B2
公开(公告)日：2012-06-12
申请号：US11636814
申请日：2006-12-11
申请人： Kyung-Yeol Sohn , Hyeong-Sook Park , Youn-Ok Park
发明人： Kyung-Yeol Sohn , Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H04J1/00
CPC分类号： H04B17/318
摘要： Disclosed herein is a base station that extracts a ranging channel signal from a received signal partially correlates each of a plurality of ranging channel signals and each of ranging codes according to ranging modes, and selects a ranging channel signal greater than a first threshold value, the plurality of ranging channel signals being signals according to plurality of time delays of a ranging channel signal. In addition, the base station correlates each of the selected ranging channel signal and each of corresponding ranging code, selects a ranging channel signal having the maximum correlation value, and estimates receiving power by using a time delay corresponding to the selected ranging channel signal.
摘要翻译：本文公开了一种从接收信号中提取测距信道信号的基站，根据测距模式对多个测距信道信号和测距码中的每一个进行部分相关，并选择大于第一阈值的测距信道信号，多个测距信道信号是根据测距信道信号的多个时间延迟的信号。此外，基站将所选择的测距信道信号和每个对应的测距码相关，选择具有最大相关值的测距信道信号，并且通过使用与所选择的测距信道信号相对应的时间延迟来估计接收功率。

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