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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。

3. 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。

4. 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。

5. 发明授权

US07986757B2 Apparatus and method of acquiring initial synchronization of terminal in mobile communication system 有权
标题翻译：在移动通信系统中获取终端初始同步的装置和方法
公开(公告)号：US07986757B2
公开(公告)日：2011-07-26
申请号：US11923622
申请日：2007-10-24
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： H04L7/00
CPC分类号： H04L7/042 , H04B1/7075 , H04L27/261 , H04L27/2655 , H04L27/2675
摘要： The present invention relates to an apparatus and method of acquiring initial synchronization of a terminal in a mobile communication system. According to an exemplary embodiment of the present invention, one or more auto-correlation values of a preamble constituting a signal that is received from a base station are calculated. Averages of the calculated auto-correlation values according to samples are calculated, and then a peak value is detected among the calculated values. Then, a cell search is performed on the basis of the detected peak value, and a peak value from the result of the cell search is regularized. Then, the regularized peak value is compared with a predetermined reference value such that it is checked whether synchronization of a signal that has been searched is accurate or not. According to an exemplary embodiment of the present invention, a value obtained by regularizing a result of a cell search is compared with a reference value, and it is checked again whether an accurate start point of a frame is detected or not on the basis of a result of the comparison. Accordingly, false alarm rates can be reduced.
摘要翻译：本发明涉及在移动通信系统中获取终端的初始同步的装置和方法。根据本发明的示例性实施例，计算构成从基站接收的信号的前导码的一个或多个自相关值。计算根据样本计算的自相关值的平均值，然后在计算值之间检测峰值。然后，基于检测到的峰值执行小区搜索，并且从小区搜索结果的峰值正规化。然后，将正则化峰值与预定参考值进行比较，以便检查已搜索的信号的同步是否准确。根据本发明的示例性实施例，将通过对小区搜索的结果进行规则化而获得的值与参考值进行比较，并且再次检查是否基于a检测到帧的准确起点比较结果。因此，可以降低误报率。

6. 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。

7. 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。

8. 发明授权

US07904044B2 Automatic gain control apparatus and method in mobile communication system 有权
标题翻译：移动通信系统中的自动增益控制装置和方法
公开(公告)号：US07904044B2
公开(公告)日：2011-03-08
申请号：US11925726
申请日：2007-10-26
申请人： Jun-Woo Kim , Hyeong-Sook Park , Youn-Ok Park
发明人： Jun-Woo Kim , Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H04B1/06
CPC分类号： H03G3/3052
摘要： The present invention relates to an automatic gain control apparatus and method in a mobile communication system. According to the automatic gain control apparatus of an embodiment of the invention, when downlink signals include both directional beam signals and beam signals traveling in all directions due to the antenna system, different reception gain reference values are used according to whether downlink signals including only the beam signals traveling in all directions are received or downlink signals including the directional beam signals are received, thereby controlling the gain of the received signal. When the downlink signals including the directional beam signals are received, the automatic gain control apparatus can appropriately control the gain of the received signal on the basis of the directional beam signals to prevent saturation of the received signal. Further, in a place where the channel condition between the terminal and the base station is bad, such as the boundaries between the cells, the reception gain is controlled on the basis of the reception gain reference value that is set in correspondence with the beam signal traveling in all directions, which makes it possible to reduce the loss of a signal-to-noise ratio (SNR).
摘要翻译：本发明涉及移动通信系统中的自动增益控制装置和方法。根据本发明的实施例的自动增益控制装置，由于天线系统，当下行信号包括定向波束信号和波导信号在所有方向上行进时，根据是否包括仅仅接收到在各个方向上行进的波束信号，或者接收包括定向波束信号的下行链路信号，从而控制接收信号的增益。当接收到包括定向波束信号的下行链路信号时，自动增益控制装置可以根据定向波束信号适当地控制接收信号的增益，以防止接收信号的饱和。此外，在终端和基站之间的信道状况（诸如小区之间的边界）不良的地方，基于与波束信号相对应地设置的接收增益参考值来控制接收增益在各个方向上行进，从而可以减少信噪比（SNR）的损失。

9. 发明申请

US20070133703A1 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：US20070133703A1
公开(公告)日：2007-06-14
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
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。

10. 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。

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