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    • 23. 发明授权
    • Apparatus and method for channel estimation in radio communication system
    • 无线电通信系统中信道估计的装置和方法
    • US06751274B2
    • 2004-06-15
    • US09737406
    • 2000-12-15
    • Kyu-Hak KimJe-Woo KimHyung-Suk KimKi-Soo Kim
    • Kyu-Hak KimJe-Woo KimHyung-Suk KimKi-Soo Kim
    • H04L100
    • H04L25/0214H04L25/0232
    • There is provided a channel estimating apparatus and method in a radio communication system. In the channel estimating apparatus, a fading estimator estimates a channel using preset symbols of an input signal, a first interpolator interpolates the other symbols of the input signal based on the fading estimation, a first inverter inverts the output signal of the first interpolator, a first delay delays the input signal for a predetermined time, a first multiplier primarily compensates the output signal of the first delay by means of the output signal of the first inverter, a second interpolator interpolates each symbol of the input signal relating to primarily compensated symbols in a predetermined period before and after the symbol, a level controller controls the level of the output signal of the second interpolator, a second inverter inverts the output signal of the level controller, a second delay for delays the primarily compensated signal for a predetermined time, and a second multiplier secondarily compensates the output signal of the second delay by means of the output signal of the second inverter.
    • 提供了一种无线电通信系统中的信道估计装置和方法。 在信道估计装置中,衰落估计器使用输入信号的预设符号来估计信道,第一内插器基于衰落估计内插输入信号的其他符号,第一反相器反转第一内插器的输出信号, 第一延迟将输入信号延迟预定时间,第一乘法器主要通过第一反相器的输出信号来补偿第一延迟的输出信号,第二内插器将与主要补偿符号相关的输入信号的每个符号内插 电平控制器控制第二内插器的输出信号的电平,第二反相器反转电平控制器的输出信号,延迟预定时间的主要补偿信号的第二延迟, 并且第二乘法器借助于输出二次补偿第二延迟的输出信号 信号。
    • 24. 发明授权
    • Device and method for reducing the peak-to-average power ratio of a mobile station's transmit power
    • 用于降低移动台发射功率的峰值与平均功率比的装置和方法
    • US06459723B1
    • 2002-10-01
    • US09310389
    • 1999-05-12
    • Je-Woo KimYoung-Jun HwangSoon-Young YoonJae-Heung Yeom
    • Je-Woo KimYoung-Jun HwangSoon-Young YoonJae-Heung Yeom
    • H04B1707
    • H04W52/367H04B1/707H04B2201/70706H04W52/52
    • A device and method are provided for reducing the peak-to-average power ratio of a mobile station's transmit power in a mobile communication system by spreading and modulating the transmission data by a complex spreading sequence. The complex spreading sequence is generated to have a plurality of chips and a phase difference of 90° between every two successive complex chips in response to each chip of a PN (Pseudo Noise) sequence. The device and method flexibly control the mobile transmit power by limiting its peak-to-average power ratio to a specific range and thus confining the mobile transmit power to a linear characteristic portion in a characteristic curve of a power amplifier. The phase of the complex spreading sequence is prevented from shifting by 180° (i.e., &pgr;) to maintain the mobile transmit power in the linear portion of the power amplifier characteristic curve.
    • 提供一种装置和方法,用于通过以复扩展顺序扩展和调制发送数据来减少移动台在移动通信系统中的发射功率的峰均功率比。 响应于PN(伪噪声)序列的每个芯片,产生复扩展序列以具有多个芯片,并且在每两个连续复合码片之间具有90°的相位差。 该装置和方法通过将其峰值平均功率比限制在特定范围并且因此将移动发射功率限制在功率放大器的特性曲线中的线性特征部分来灵活地控制移动发射功率。 复数扩展序列的相位被防止偏移180°(即,pi),以将移动发射功率保持在功率放大器特性曲线的线性部分。
    • 26. 发明授权
    • Adaptive motion estimation and mode decision apparatus and method for H.264 video codec
    • H.264视频编解码器的自适应运动估计和模式决策设备及方法
    • US07764738B2
    • 2010-07-27
    • US10976781
    • 2004-11-01
    • Yong-Hwan KimJe-Woo KimHyeok-Koo JungJoonki Paik
    • Yong-Hwan KimJe-Woo KimHyeok-Koo JungJoonki Paik
    • H04N7/12
    • H04N19/567H04N5/145H04N19/57
    • Disclosed herein is an adaptive motion estimation and mode decision apparatus and method for an H.264 video codec. The apparatus includes a background image detection unit, an inter mode inspection unit, an intra mode inspection unit and a mode inspection skip unit. The background image detection unit inspects whether a fixed background or slowly and regularly moving block exists, and skips the step of dividing a first corresponding macroblock into smaller sized blocks and performing block mode inspection. The inter mode inspection unit inspects whether an irregularly or fast moving macroblock exists, and determines whether to divide a corresponding macroblock into smaller sized blocks and to perform block mode inspection on the smaller sized blocks. The intra mode inspection unit performs AZCB inspection on the macroblocks, and determines whether to divide a corresponding macroblock into smaller sized blocks block and to perform mode inspection on the smaller sized blocks. The mode inspection skip unit skips the block mode inspection for the smaller sized blocks.
    • 这里公开了一种用于H.264视频编解码器的自适应运动估计和模式决定装置和方法。 该装置包括背景图像检测单元,帧间模式检查单元,帧内模式检查单元和模式检查跳过单元。 背景图像检测单元检查是否存在固定的背景或缓慢且有规律的移动块,并且跳过将第一对应宏块划分成较小尺寸块并执行块模式检查的步骤。 帧间模式检查单元检查是否存在不规则或快速移动的宏块,并且确定是否将相应的宏块划分成较小尺寸的块并且对较小尺寸的块执行块模式检查。 帧内模式检查单元对宏块执行AZCB检查,并且确定是否将对应的宏块分割成较小尺寸的块块,并对较小尺寸的块执行模式检查。 模式检查跳过单元跳过较小尺寸块的块模式检查。
    • 29. 发明授权
    • Spread spectrum signal generating device and method in transmitter of mobile communications system
    • 移动通信系统发射机中的扩频信号发生装置及方法
    • US06396868B1
    • 2002-05-28
    • US09135990
    • 1998-08-18
    • Soon-Young YoonJae-Min AhnHee-Won KangYoung-Ky KimJong-Seon NoHong-Yeop SongHa-Bong ChungJe-Woo Kim
    • Soon-Young YoonJae-Min AhnHee-Won KangYoung-Ky KimJong-Seon NoHong-Yeop SongHa-Bong ChungJe-Woo Kim
    • H04B1707
    • H04B1/707H04B2201/70706H04J13/004
    • There are provided spread spectrum signal generating devices and methods in a transmitter of a mobile communications system using a plurality of logical channels. In the spread spectrum signal generating devices, a multiplexer time multiplexes a pilot channel signal and a control channel signal which are output at substantially constant power levels. A first orthogonal encoder orthogonally spreads the output of the multiplexer with an orthogonal code. A second orthogonal encoder orthogonally spreads voice channel data of a variable bit rate with an orthogonal code. A third orthogonal encoder orthogonally spreads packet channel data of a variable bit rate with an orthogonal code. An IQ signal mapper adds the outputs of the first and third orthogonal encoders, outputs the added signal as a first channel signal, and outputs the output of the second orthogonal encoder as a second channel signal. A PN spreader spreads the first and second channel signals with PN codes and outputs a final spectrum spread signal, which exhibits a substantially minimized peak-to-average power ratio.
    • 在使用多个逻辑信道的移动通信系统的发射机中提供扩频信号产生装置和方法。 在扩展频谱信号发生装置中,多路复用器以基本上恒定的功率电平输出导频信道信号和控制信道信号。 第一正交编码器使用正交码对多路复用器的输出进行正交扩展。 第二正交编码器用正交码对可变比特率的语音信道数据进行正交扩频。 第三正交编码器使用正交码对可变比特率的分组信道数据进行正交扩展。 IQ信号映射器将第一和第三正交编码器的输出相加,输出相加的信号作为第一信道信号,并将第二正交编码器的输出作为第二信道信号输出。 PN扩展器用PN码扩展第一和第二信道信号,并输出最终的频谱扩展信号,其表现出基本上最小化的峰均功率比。