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    • 33. 发明授权
    • Channel estimation apparatus and method using linear/nonlinear average in wireless telecommunication system
    • 在无线电信系统中使用线性/非线性平均的信道估​​计装置和方法
    • US08520751B2
    • 2013-08-27
    • US12514121
    • 2007-10-20
    • Sung-Ik ParkHyoung-Soo LimHeung-Mook KimJong-Soo LimSoo-In Lee
    • Sung-Ik ParkHyoung-Soo LimHeung-Mook KimJong-Soo LimSoo-In Lee
    • H04L27/28H04B15/00
    • H04L27/28
    • Provided is a channel estimation apparatus and method using a linear/nonlinear average in a wireless communication system. The present research provides a channel estimation apparatus and method for estimating a channel between a transmitter and a receiver from a pilot-inserted OFDM signal and linearly or nonlinearly averaging the estimating channel, thereby preventing the equalizer performance from being degraded by noise component of the estimated channel and noise amplification caused by deep fading. The channel estimation apparatus includes: a channel estimation unit configured to estimate a channel coefficient of a channel between a transmitter and a receiver from a pilot-inserted carrier signal according to pilot arrangement; and a linear/nonlinear averaging unit configured to linearly or nonlinearly averaging the estimated channel coefficient, thereby preventing an equalizer performance from being degraded by noise component existing in the channel and noise amplification caused by deep fading.
    • 提供了一种在无线通信系统中使用线性/非线性平均的信道估​​计装置和方法。 本研究提供了一种信道估计装置和方法,用于从导频插入OFDM信号估计发射机和接收机之间的信道,并且对估计信道进行线性或非线性平均,从而防止均衡器性能被估计的噪声分量降低 通道和噪声放大引起的深度衰落。 信道估计装置包括:信道估计单元,被配置为根据导频布置从导频插入载波信号估计发射机和接收机之间的信道的信道系数; 以及线性/非线性平均单元,被配置为对所估计的信道系数进行线性或非线性平均化,从而防止均衡器性能由存在于信道中的噪声分量和由深衰落引起的噪声放大降低。
    • 34. 发明申请
    • CHANNEL ESTIMATION APPARATUS AND METHOD USING LINEAR/NONLINEAR AVERAGE IN WIRELESS TELECOMMUNICATION SYSTEM
    • 在无线电信系统中使用线性/非线性平均的信道估​​计装置和方法
    • US20100061471A1
    • 2010-03-11
    • US12514121
    • 2007-10-20
    • Sung-Ik ParkHyoung-Soo LimHeung-Mook KimJong-Soo LimSoo-In Lee
    • Sung-Ik ParkHyoung-Soo LimHeung-Mook KimJong-Soo LimSoo-In Lee
    • H04L27/28H04B15/00
    • H04L27/28
    • Provided is a channel estimation apparatus and method using a linear/nonlinear average in a wireless communication system. The present research provides a channel estimation apparatus and method for estimating a channel between a transmitter and a receiver from a pilot-inserted OFDM signal and linearly or nonlinearly averaging the estimating channel, thereby preventing the equalizer performance from being degraded by noise component of the estimated channel and noise amplification caused by deep fading. The channel estimation apparatus includes: a channel estimation unit configured to estimate a channel coefficient of a channel between a transmitter and a receiver from a pilot-inserted carrier signal according to pilot arrangement; and a linear/nonlinear averaging unit configured to linearly or nonlinearly averaging the estimated channel coefficient, thereby preventing an equalizer performance from being degraded by noise component existing in the channel and noise amplification caused by deep fading.
    • 提供了一种在无线通信系统中使用线性/非线性平均的信道估​​计装置和方法。 本研究提供了一种信道估计装置和方法,用于从导频插入OFDM信号估计发射机和接收机之间的信道,并且对估计信道进行线性或非线性平均,从而防止均衡器性能被估计的噪声分量降低 通道和噪声放大引起的深度衰落。 信道估计装置包括:信道估计单元,被配置为根据导频布置从导频插入载波信号估计发射机和接收机之间的信道的信道系数; 以及线性/非线性平均单元,被配置为对所估计的信道系数进行线性或非线性平均化,从而防止均衡器性能由存在于信道中的噪声分量和由深衰落引起的噪声放大降低。
    • 36. 发明授权
    • Modulation apparatus for reducing time delay of on-channel repeater in terrestrial digital TV broadcasting system
    • 用于减少地面数字电视广播系统中的同频中继器的时延的调制装置
    • US07301994B2
    • 2007-11-27
    • US10839315
    • 2004-05-04
    • Sung-Ik ParkYong-Tae LeeJae-Hyun SeoSeung-Won KimSoo-In Lee
    • Sung-Ik ParkYong-Tae LeeJae-Hyun SeoSeung-Won KimSoo-In Lee
    • H04B3/36
    • H04H20/72H04H20/02H04N5/40
    • Provided is a modulation apparatus that can reduce time delay of on-channel repeaters in a terrestrial digital television broadcasting system. The time delay is caused by a filter during the modulation operation in the on-channel repeaters. The modulation apparatus of the present research includes: a baseband signal forming unit for forming a baseband signal by combining the output signals of an equalization unit with the pre-defined field/segment synchronization signals in the on-channel repeaters; a pilot inserting unit for inserting a pilot signal to the baseband signal; an up-sampling unit for up-sampling the baseband signal with the pilot signal; a VSB filtering unit for filtering the up-sampled baseband signal based on a Window technique and/or an Equi-Ripple filter to thereby form an in-phase (I) signal and a quadrature (Q) signal; an up-converting unit for up-converting the frequencies of the filtered I and Q signals to frequencies of an intermediate frequency (IF) band; an adding unit for adding the up-converted I and Q signals and converting a resultant signal into a digital VSB signal of the IF band; and a digital-to-analogue converting unit for converting the digital signal of the IF band to an analogue signal.
    • 提供了一种可以减少地面数字电视广播系统中的通道中继器的时间延迟的调制装置。 在通道中继器的调制操作期间,时间延迟是由滤波器引起的。 本研究的调制装置包括:基带信号形成单元,用于通过将均衡单元的输出信号与在线通道中继器中的预定义的场/段同步信号组合来形成基带信号; 导频插入单元,用于将导频信号插入到基带信号中; 用于使用导频信号对基带信号进行上采样的上采样单元; VSB滤波单元,用于基于Window技术和/或Equi-Ripple滤波器对上采样基带信号进行滤波,从而形成同相(I)信号和正交(Q)信号; 上变频单元,用于将滤波的I和Q信号的频率上变频到中频(IF)频带的频率; 加法单元,用于将上变频的I和Q信号相加,并将结果信号转换成IF频带的数字VSB信号; 以及用于将IF频带的数字信号转换为模拟信号的数模转换单元。