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81. 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。

82. 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。

83. 发明授权

US07801088B2 Synchronous orthogonal frequency division multiplexing receiving apparatus in multi-cell environment and method thereof 有权
标题翻译：多小区环境中的同步正交频分复用接收装置及其方法
公开(公告)号：US07801088B2
公开(公告)日：2010-09-21
申请号：US11720605
申请日：2005-11-10
申请人： Jun-Woo Kim , Jae-Gun Jung , Youn-Ok Park
发明人： Jun-Woo Kim , Jae-Gun Jung , Youn-Ok Park
IPC分类号： H04B7/216 , H04L7/00
CPC分类号： H04L27/2662 , H04L5/0007 , H04L5/0016 , H04L25/03866 , H04L27/2602 , H04L27/2656 , H04L27/2678
摘要： A receiving apparatus of a mobile terminal receiving a signal in a synchronous OFDM system under a multi-cell environment, including a demodulation start controller performing frame synchronization and cell search using a received signal and outputting information on a demodulation start point and a to-be-demodulated neighbor cell; a FFT unit converting a time-domain signal into a frequency-domain signal; a scramble code generator generating scramble codes for the to-be-demodulated neighbor cell from the demodulation start controller and the current cell; a correlator multiplying a signal from the FFT unit and scramble codes from the scramble code generator and outputting correlation signals; demodulators provided corresponding to a current cell and a maximum number of neighbor cells to be demodulated, and demodulating the correlation signals; and a decoder decoding signals from the demodulators and restoring original information transmitted from the corresponding cell.
摘要翻译：一种在多小区环境下在同步OFDM系统中接收信号的移动终端的接收装置，包括：解调启动控制器，使用接收信号执行帧同步和小区搜索，并输出关于解调起始点和待机信号的信息调制相邻单元; 将时域信号转换为频域信号的FFT单元; 扰码代码生成器，用于从解调起始控制器和当前小区为待解调的相邻小区生成扰码; 相关器将来自FFT单元的信号和来自加扰码发生器的扰码相乘并输出相关信号; 对应于当前小区提供的解调器和要解调的最大数量的相邻小区，以及对相关信号进行解调; 以及解码器，对来自解调器的信号进行解码并恢复从相应的单元发送的原始信息。

84. 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。

85. 发明申请

US20080117962A1 AUTOMATIC GAIN CONTROL APPARATUS AND METHOD IN MOBILE COMMUNICATION SYSTEM 有权
标题翻译：自动增益控制装置及其在移动通信系统中的应用
公开(公告)号：US20080117962A1
公开(公告)日：2008-05-22
申请号：US11930029
申请日：2007-10-30
申请人： Jun-Woo Kim , Youn-Ok Park
发明人： Jun-Woo Kim , Youn-Ok Park
IPC分类号： H04L27/28 , H04L23/02 , H04L27/01
CPC分类号： H04L27/2647 , H04L1/0052 , H04L5/023
摘要： The present invention relates to a demodulating device and method in an orthogonal frequency division multiple access (OFDMA) communication system. A demodulating device according to an exemplary embodiment of the invention uses only one demodulator, one slot buffer, and one channel decoder to demodulate a plurality of data bursts included in one frame. In addition, in order to reduce a memory size required to demodulate a plurality of data bursts, a memory is managed in the units of sub-channels, instead of classifying memory cells so as to correspond to the data bursts. According to the demodulating device, it is possible to simplify a hardware structure and to reduce a memory size required to demodulate data bursts. As a result, it is possible to reduce manufacturing costs and decrease the number of signal lines of a channel decoder required for an interface.
摘要翻译：本发明涉及正交频分多址（OFDMA）通信系统中的解调装置和方法。根据本发明的示例性实施例的解调装置仅使用一个解调器，一个时隙缓冲器和一个信道解码器来解调包括在一个帧中的多个数据突发。此外，为了减少解调多个数据脉冲串所需的存储器大小，以子信道为单位来管理存储器，而不是分类存储器单元以对应于数据脉冲串。根据解调装置，可以简化硬件结构并减少解调数据脉冲串所需的存储器大小。结果，可以降低制造成本并减少接口所需的通道解码器的信号线的数量。

86. 发明授权

US07359366B2 Uplink ranging system and method in OFDMA system 有权
标题翻译： OFDMA系统上行测距系统及方法
公开(公告)号：US07359366B2
公开(公告)日：2008-04-15
申请号：US10971787
申请日：2004-10-21
申请人： Young-Ha Lee , Jun-Woo Kim , Youn-Ok Park , Seung-Ku Hwang
发明人： Young-Ha Lee , Jun-Woo Kim , Youn-Ok Park , Seung-Ku Hwang
IPC分类号： H04B7/208
CPC分类号： H04J3/0682 , H04L5/023 , H04L27/2655
摘要： Disclosed is a ranging system and method in an OFDMA system. The ranging system includes complex exponential twiddle storage units for respectively storing complex exponential twiddle factors corresponding to a timing error, complex multipliers for respectively complex-multiplying the complex exponential twiddle factors by received uplink ranging data, code correlators for respectively correlating the outputs of the complex multipliers and ranging codes, and threshold comparators for respectively comparing the outputs of the code correlators with a threshold.
摘要翻译：公开了OFDMA系统中的测距系统和方法。测距系统包括用于分别存储对应于定时误差的复指数旋转因子的复指数旋转存储单元，用于分别复数乘以接收的上行测距数据的复指数旋转因子的复乘数，用于分别将复数的输出相关联的码相关器乘法器和测距码，以及用于分别比较码相关器的输出与阈值的阈值比较器。

87. 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。

88. 发明申请

US20070291861A1 Apparatus and Method for Generating Ranging Pseudo Noise Code 有权
标题翻译：用于生成测距伪噪声码的装置和方法
公开(公告)号：US20070291861A1
公开(公告)日：2007-12-20
申请号：US11667884
申请日：2005-09-07
申请人： Kyung-Yeol Sohn , Youn-Ok Park
发明人： Kyung-Yeol Sohn , Youn-Ok Park
IPC分类号： H04L23/02 , H04J13/00
CPC分类号： H04J13/10 , H04J13/0022 , H04L5/023
摘要： Disclosed is an apparatus for generating a ranging pseudo noise code used for a terminal of a portable internet system of an OFDM access scheme. The apparatus for generating ranging pseudo noise code detects a cell ID number using a preamble signal transmitted from a base station covering the terminal, detects a ranging pseudo noise code mask value using the detected cell ID number and system parameters input from the base station, and generates a ranging pseudo noise code using the detected cell ID number and the ranging pseudo noise code mask value. With the above structure, a constant initial value can be used irregardless of the cell ID number of the base station, and a desired ranging pseudo noise code can be generated as fast as possible so as to have a desired offset.
摘要翻译：公开了一种用于生成用于OFDM接入方案的便携式因特网系统的终端的测距伪噪声码的装置。用于产生测距伪噪声代码的装置使用从覆盖终端的基站发送的前导码信号来检测小区ID号，使用检测到的小区ID号和从基站输入的系统参数检测测距伪噪声码掩码值，以及使用检测到的小区ID号码和测距伪噪声码掩码值，生成测距伪噪声码。利用上述结构，无论基站的小区ID号码如何，都可以使用恒定的初始值，并且可以尽可能快地生成期望的测距伪噪声码，以便具有期望的偏移。

89. 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。

90. 发明授权

US07221721B2 Frequency offset calculation method using log transforms and linear approximation 失效
标题翻译：使用对数变换和线性近似的频偏计算方法
公开(公告)号：US07221721B2
公开(公告)日：2007-05-22
申请号：US10334938
申请日：2002-12-31
申请人： Jun-Woo Kim , Young-Ha Lee , Young-Hoon Kim , Youn-Ok Park
发明人： Jun-Woo Kim , Young-Ha Lee , Young-Hoon Kim , Youn-Ok Park
IPC分类号： H04L27/06 , G06F1/02 , G06F17/10
CPC分类号： H04L27/2657 , H04L27/2675 , H04L27/2684
摘要： A method for calculating frequency offset using arc tangent calculations according to real part and imaginary part input values received externally. The method includes converting arc tangent equations for determining frequency offset into equations to perform log calculations; calculating frequency offset using linear approximation and the converted log equations; and dividing the real part input value to bit values of a predetermined size to realize a size similar to that of the imaginary part input value if a range of the frequency offset value to be calculated is small. With the use of the method, hardware area and power consumption may be reduced, and precise frequency offset may be calculated.
摘要翻译：根据外部接收的实部和虚部输入值，使用反正切运算计算频偏的方法。该方法包括将用于确定频率偏移的反正切方程转换为方程以执行对数计算; 使用线性近似和转换的对数方程计算频偏; 并且如果要计算的频率偏移值的范围较小，则将实部输入值除以预定大小的位值，以实现与虚部输入值的大小相似的大小。通过使用该方法，可以减少硬件面积和功率消耗，并且可以计算精确的频率偏移。

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