公开(公告)号：US07194027B2

公开(公告)日：2007-03-20

申请号：US10413663

申请日：2003-04-15

申请人： Jae-woo Kim ,  Chang-hyun Yim ,  Hyun-cheol Park ,  Oh-sang Kwon ,  Jung-hoon Kim ,  Sung-hyun Hwang

发明人： Jae-woo Kim ,  Chang-hyun Yim ,  Hyun-cheol Park ,  Oh-sang Kwon ,  Jung-hoon Kim ,  Sung-hyun Hwang

IPC分类号： H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC分类号： H04L25/03038 ,  H04L27/0008 ,  H04L2025/0342 ,  H04L2025/03764 ,  H04L2027/0038 ,  H04L2027/0055 ,  H04L2027/0067

摘要： A channel equalizing and carrier recovery system for home phoneline networking alliance (HomePNA) receiver and method thereof are provided. The channel equalizing system includes a frequency diverse quadrature amplitude modulation (FD-QAM) equalizer and a quadrature amplitude modulation (QAM) equalizer. The FD-QAM equalizer receives an FD-QAM signal, determines FD-QAM tap coefficients, and equalizes the FD-QAM signal using the FD-QAM tap coefficients. The QAM equalizer receives a QAM signal, determines QAM tap coefficients, and equalizes the QAM signal using the QAM tap coefficients. The QAM equalizer receives the FD-QAM signal and determines the QAM tap coefficients during a predetermined header period. The carrier recovery circuit includes a phase detector, a loop filter, and a numerically controlled oscillator (NCO). The phase detector uses a phase difference between a reception symbol and a decision signal of the reception symbol as an instantaneous phase difference when the reception symbol is a data symbol of an FD-QAM signal or a symbol of a QAM signal, uses “0” as the instantaneous phase difference when the reception symbol is a zero symbol of the FD-QAM signal, averages instantaneous phase differences during a predetermined period or time, and outputs the result of averaging. The loop filter filters the output signal of the phase detector. The NCO generates an oscillation signal having a variable phase in response to an output signal of the loop filter so that a phase error of a reception signal can be controlled.

摘要翻译： 提供了一种用于家庭网络联盟（HomePNA）接收机及其方法的信道均衡和载波恢复系统。 信道均衡系统包括频率分量正交幅度调制（FD-QAM）均衡器和正交幅度调制（QAM）均衡器。 FD-QAM均衡器接收FD-QAM信号，确定FD-QAM抽头系数，并使用FD-QAM抽头系数对FD-QAM信号进行均衡。 QAM均衡器接收QAM信号，确定QAM抽头系数，并使用QAM抽头系数对QAM信号进行均衡。 QAM均衡器接收FD-QAM信号，并在预定的报头周期内确定QAM抽头系数。 载波恢复电路包括相位检测器，环路滤波器和数控振荡器（NCO）。 当接收符号是FD-QAM信号的数据符号或QAM信号的符号时，相位检测器使用接收符号和接收符号的判定信号之间的相位差作为瞬时相位差，使用“0” 作为接收符号是FD-QAM信号的零符号时的瞬时相位差，在预定时间段或时间期间平均瞬时相位差，并输出平均结果。 环路滤波器对相位检测器的输出信号进行滤波。 NCO响应于环路滤波器的输出信号产生具有可变相位的振荡信号，从而可以控制接收信号的相位误差。

公开(公告)号：US07305048B2

公开(公告)日：2007-12-04

申请号：US10427371

申请日：2003-05-01

申请人： Sung-hyun Hwang ,  Hyun-cheol Park ,  Oh-sang Kwon ,  Chang-hyun Yim ,  Jae-woo Kim ,  Jung-hoon Kim

发明人： Sung-hyun Hwang ,  Hyun-cheol Park ,  Oh-sang Kwon ,  Chang-hyun Yim ,  Jae-woo Kim ,  Jung-hoon Kim

IPC分类号： H04L27/06

CPC分类号： H04L27/2271 ,  H04L7/0029 ,  H04L7/10

摘要： A receiver performing a stable operation in a burst mode is provided. The receiver transmits packet data using a preamble, and has good acquisition performance so that a synchronization part converges on a preamble interval. For the acquisition performance, the receiver senses the carrier of a received signal, detects a rough location of a burst, and in response to the result of carrier sensing, performs coarse gain control, symbol timing compensation, and frame synchronization. Then, if the frame synchronization is completed, in response to the result of frame synchronization, the receiver performs fine gain control, equalization of the signal, and carrier recovery.

摘要翻译： 提供了以突发模式执行稳定操作的接收机。 接收机使用前置码发送分组数据，并且具有良好的采集性能，使得同步部分收敛于前导码间隔。 对于采集性能，接收机感测接收信号的载波，检测突发的粗略位置，并且响应于载波侦听的结果，执行粗增益控制，符号定时补偿和帧同步。 然后，如果帧同步完成，则响应于帧同步的结果，接收机执行精细的增益控制，信号的均衡和载波恢复。

公开(公告)号：US20050094715A1

公开(公告)日：2005-05-05

申请号：US10981428

申请日：2004-11-04

申请人： Sung-hyun Hwang ,  Hyun-cheol Park ,  Yu-sung Lee

发明人： Sung-hyun Hwang ,  Hyun-cheol Park ,  Yu-sung Lee

IPC分类号： H04B7/02 ,  H04B1/707

CPC分类号： H04B1/7093 ,  H04B1/7107 ,  H04B1/7115

摘要： Provided is a method of compensating for energy loss and eliminating inter-symbol interference (ISI) and inter-chip interference (ISI) in wireless signals, and a rake receiver for wireless LANs adopting the same. The rake receiver compensates for energy loss of a CCK signal transmitted in a multi-path wireless channel environment and eliminates ISI and ICI from the received CCK signal because a DFE structure per chip used for calculating ICI components, is connected in parallel with a DFE structure per symbol, thus eliminating ISI and ICI components.

摘要翻译： 提供了补偿能量损失并消除无线信号中的符号间干扰（ISI）和芯片间干扰（ISI）的方法，以及采用该无线LAN的无线LAN的耙式接收机。 瑞克接收机补偿在多路径无线信道环境中发送的CCK信号的能量损失，并且从接收的CCK信号中消除ISI和ICI，因为用于计算ICI分量的每个芯片的DFE结构与DFE结构并联连接 每个符号，从而消除ISI和ICI组件。

公开(公告)号：US07386035B2

公开(公告)日：2008-06-10

申请号：US10981428

申请日：2004-11-04

申请人： Sung-hyun Hwang ,  Hyun-cheol Park ,  Yu-sung Lee

发明人： Sung-hyun Hwang ,  Hyun-cheol Park ,  Yu-sung Lee

IPC分类号： H04B1/00

CPC分类号： H04B1/7093 ,  H04B1/7107 ,  H04B1/7115

摘要： Provided is a method of compensating for energy loss and eliminating inter-symbol interference (ISI) and inter-chip interference (ISI) in wireless signals, and a rake receiver for wireless LANs adopting the same. The rake receiver compensates for energy loss of a CCK signal transmitted in a multi-path wireless channel environment and eliminates ISI and ICI from the received CCK signal because a DFE structure per chip used for calculating ICI components, is connected in parallel with a DFE structure per symbol, thus eliminating ISI and ICI components.

摘要翻译： 提供了补偿能量损失并消除无线信号中的符号间干扰（ISI）和芯片间干扰（ISI）的方法，以及采用该无线LAN的无线LAN的耙式接收机。 瑞克接收机补偿在多路径无线信道环境中发送的CCK信号的能量损失，并且从接收的CCK信号中消除ISI和ICI，因为用于计算ICI分量的每个芯片的DFE结构与DFE结构并联连接 每个符号，从而消除ISI和ICI组件。

公开(公告)号：US07333579B2

公开(公告)日：2008-02-19

申请号：US10354646

申请日：2003-01-30

申请人： Sung-hyun Hwang

发明人： Sung-hyun Hwang

IPC分类号： H04L7/00

CPC分类号： H04L7/0029 ,  H04L27/2662

摘要： A robust symbol timing recovery circuit for a telephone line modem is provided. The symbol timing recovery circuit comprises a timing estimator and an interpolator. The timing estimator, which performs an operation on input samples and estimates a timing offset of a received symbol, outputs a timing offset estimated for each symbol for a first window interval, and thereafter outputs a timing offset estimated in an immediately previous window interval for the current window interval. The interpolator, which performs interpolation using the input samples, comprises a plurality of shift registers which are serially connected and output the input samples in units of a predetermined plural number of input samples, by sequentially delaying for an input sample 15 period and outputting the input samples. Since the symbol timing recovery circuit is not sensitive to clock instability and employs a stable timing offset estimating method, symbol timing can be recovered stably and reliably.

摘要翻译： 提供了一种用于电话线调制解调器的鲁棒符号定时恢复电路。 符号定时恢复电路包括定时估计器和内插器。 执行对输入样本的操作并估计接收到的符号的定时偏移的定时估计器输出针对第一窗口间隔为每个符号估计的定时偏移，然后输出在紧接在前的窗口间隔中估计的定时偏移 当前窗口间隔。 使用输入样本进行内插的内插器包括多个移位寄存器，它们以预定的多个输入样本为单位串行连接并输出输入样本，通过顺序地延迟输入样本15周期并输出输入 样品。 由于符号定时恢复电路对时钟不稳定性不敏感，并且采用稳定的定时偏移估计方法，可以稳定可靠地恢复符号定时。

公开(公告)号：US07136434B2

公开(公告)日：2006-11-14

申请号：US10287770

申请日：2002-11-05

申请人： Sung-hyun Hwang

发明人： Sung-hyun Hwang

IPC分类号： H03D1/00

CPC分类号： G01R21/10

摘要： An apparatus and a method for detecting the energy of a tone signal. A pre-process unit takes absolute values of transmitted samples and outputs the values to a delay unit for delaying the transmitted samples according to a predetermined delay interval. An operation unit subtracts the value calculated by multiplying the magnitudes of the samples transmitted before and after the burst detection from the square value of the magnitude of the sample at the time of burst detection among the delayed transmitted samples. A detection unit detects the burst by confirming whether peaks corresponding to the number of the samples transmitted before the sample of the burst detection are detected by a signal of an value input from the operation unit. Therefore, the present invention can reduce a probability of a false alarm caused by an impulse error and burst errors and thus perform stable burst detection.

摘要翻译： 用于检测音调信号的能量的装置和方法。 预处理单元获取发送样本的绝对值，并将值输出到延迟单元，用于根据预定的延迟时间间隔延迟发送的样本。 操作单元通过将在脉冲串检测之前和之后发送的样本的幅度乘以在延迟发送的采样之间的脉冲串检测时的样本的幅度的平方值而减去计算出的值。 检测单元通过确认是否通过从操作单元输入的值的信号检测与突发检测的样本之前发送的样本数量相对应的峰值来检测突发。 因此，本发明可以降低由脉冲误差和突发错误引起的误报的概率，从而进行稳定的突发检测。