公开(公告)号：US20080008082A1

公开(公告)日：2008-01-10

申请号：US11722063

申请日：2005-03-15

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04J11/00

CPC分类号： H04L27/2657 ,  H04L27/2613 ,  H04L27/2662 ,  H04L27/2675

摘要： The present invention relates to a method for estimating a timing error and a frequency offset in a high-speed portable Internet system and a method thereof. A predetermined preamble symbol is added to an OFDM frame to be transmitted by a transmitter according to an exemplary embodiment of the present invention, an IFFT operation is performed, and then a pseudo noise is multiplexed by the preamble symbol to estimate the timing error and the frequency offset. A receiver receives an OFDM symbol, extracts the preamble symbol from the OFDM symbol, and multiplexes the extracted preamble symbol by a local pseudo noise, which is equal to the pseudo noise used by the transmitter but is shifted.

摘要翻译： 本发明涉及用于估计高速便携式因特网系统中的定时误差和频率偏移的方法及其方法。 根据本发明的示例性实施例，将预定的前导码符号添加到要由发射机发射的OFDM帧，执行IFFT操作，然后通过前导码符号复用伪噪声以估计定时误差，并且 频偏。 接收机接收OFDM符号，从OFDM符号中提取前导码符号，并将所提取的前导符号多路复用等于由发射机使用的伪噪声但被移位的本地伪噪声。

公开(公告)号：US20070183518A1

公开(公告)日：2007-08-09

申请号：US11636799

申请日：2006-12-11

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04K1/10

CPC分类号： H04L27/2662 ,  H04B7/0413 ,  H04L5/0007 ,  H04L5/0026 ,  H04L5/0048 ,  H04L27/2657 ,  H04L27/2679

摘要： The present invention relates to a method and device for estimating a timing error and a frequency offset in the MIMO mobile communication system. In a system including a plurality of transmit antennas and a plurality of receive antennas, a predetermined preamble symbol is inserted into a frame to be transmitted by a transmitting device, and pseudo noise is multiplied to the preamble symbol, and result signal is transmitted through each transmit antenna. A receiving device receives the signal through each receive antenna, extracts a preamble symbol from the OFDM symbol, and multiplies local pseudo noise that corresponds to the pseudo noise used by the transmitting device and is shifted by the extracted preamble symbol. A timing error is estimated and compensated according to the correlation of the pseudo noise of the transmitting device and the local pseudo noise of the receiving device. A frequency offset is estimated and compensated according to the phase difference between the preamble symbols. Therefore, the system is realized in a simpler manner and timing error and frequency offset estimation and compensation performance is further improved.

摘要翻译： 本发明涉及用于估计MIMO移动通信系统中的定时误差和频率偏移的方法和装置。 在包括多个发送天线和多个接收天线的系统中，将预定的前导码符号插入由发送装置发送的帧中，并将伪噪声与前导符号相乘，并且通过每个发送结果信号发送结果信号 发射天线。 接收装置通过每个接收天线接收信号，从OFDM符号中提取前导码符号，并且乘以对应于由发送装置使用的伪噪声并被所提取的前导符号移位的本地伪噪声。 根据发送装置的伪噪声与接收装置的本地伪噪声的相关性来估计和补偿定时误差。 根据前导符号之间的相位差来估计和补偿频率偏移。 因此，系统以简单的方式实现，进一步提高了定时误差和频偏估计和补偿性能。

公开(公告)号：US07961697B2

公开(公告)日：2011-06-14

申请号：US11722063

申请日：2005-03-25

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04B7/208

CPC分类号： H04L27/2657 ,  H04L27/2613 ,  H04L27/2662 ,  H04L27/2675

摘要： The present invention relates to a method for estimating a timing error and a frequency offset in a high-speed portable Internet system and a method thereof. A predetermined preamble symbol is added to an OFDM frame to be transmitted by a transmitter according to an exemplary embodiment of the present invention, an IFFT operation is performed, and then a pseudo noise is multiplexed by the preamble symbol to estimate the timing error and the frequency offset. A receiver receives an OFDM symbol, extracts the preamble symbol from the OFDM symbol, and multiplexes the extracted preamble symbol by a local pseudo noise, which is equal to the pseudo noise used by the transmitter but is shifted.

摘要翻译： 本发明涉及用于估计高速便携式因特网系统中的定时误差和频率偏移的方法及其方法。 根据本发明的示例性实施例，将预定的前导码符号添加到要由发射机发射的OFDM帧，执行IFFT操作，然后通过前导码符号复用伪噪声以估计定时误差，并且 频偏。 接收机接收OFDM符号，从OFDM符号中提取前导码符号，并将所提取的前导符号多路复用等于由发射机使用的伪噪声但被移位的本地伪噪声。

公开(公告)号：US20070153927A1

公开(公告)日：2007-07-05

申请号：US11636872

申请日：2006-12-11

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04K1/10 ,  H04B1/10

CPC分类号： H04L27/2647 ,  H04L25/022 ,  H04L25/0236 ,  H04L25/025 ,  H04L25/03821

摘要： An ICI cancellation iterative receiver and an ICI cancellation method in the wireless communication system is provided. In order to eliminate the Inter-carrier-interference (ICI) due to phase noise, an adaptive ICI cancellation scheme based on the wireless communication system is presented. In order to correct the contaminated preamble symbols due to phase noise, a first LMS adaptive filter in the receiver cancels the ICI. In the following data symbols of a frame, joint of the turbo decoder and channel estimation is provided. The complexity of the joint algorithm is analyzed and the algorithm can be implemented in the wireless communication system. The simulation results show that the performance can be improved dramatically.

摘要翻译： 提供了无线通信系统中的ICI消除迭代接收机和ICI消除方法。 为了消除由于相位噪声引起的载波间干扰（ICI），提出了一种基于无线通信系统的自适应ICI消除方案。 为了校正由于相位噪声引起的污染的前导码符号，接收机中的第一LMS自适应滤波器消除了ICI。 在帧的以下数据符号中，提供turbo解码器和信道估计的联合。 分析了联合算法的复杂性，并且可以在无线通信系统中实现该算法。 仿真结果表明，性能可以大大提高。

公开(公告)号：US07936832B2

公开(公告)日：2011-05-03

申请号：US11636872

申请日：2006-12-11

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2647 ,  H04L25/022 ,  H04L25/0236 ,  H04L25/025 ,  H04L25/03821

摘要： An ICI cancellation iterative receiver and an ICI cancellation method in the wireless communication system is provided. In order to eliminate the Inter-carrier-interference (ICI) due to phase noise, an adaptive ICI cancellation scheme based on the wireless communication system is presented. In order to correct the contaminated preamble symbols due to phase noise, a first LMS adaptive filter in the receiver cancels the ICI. In the following data symbols of a frame, joint of the turbo decoder and channel estimation is provided. The complexity of the joint algorithm is analyzed and the algorithm can be implemented in the wireless communication system. The simulation results show that the performance can be improved dramatically.

摘要翻译： 提供了无线通信系统中的ICI消除迭代接收机和ICI消除方法。 为了消除由于相位噪声引起的载波间干扰（ICI），提出了一种基于无线通信系统的自适应ICI消除方案。 为了校正由于相位噪声引起的污染的前导码符号，接收机中的第一LMS自适应滤波器消除了ICI。 在帧的以下数据符号中，提供turbo解码器和信道估计的联合。 分析了联合算法的复杂性，并且可以在无线通信系统中实现该算法。 仿真结果表明，性能可以大大提高。

公开(公告)号：US07778338B2

公开(公告)日：2010-08-17

申请号：US11636799

申请日：2006-12-11

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2662 ,  H04B7/0413 ,  H04L5/0007 ,  H04L5/0026 ,  H04L5/0048 ,  H04L27/2657 ,  H04L27/2679

摘要： The present invention relates to a method and device for estimating a timing error and a frequency offset in the MIMO mobile communication system. In a system including a plurality of transmit antennas and a plurality of receive antennas, a predetermined preamble symbol is inserted into a frame to be transmitted by a transmitting device, and pseudo noise is multiplied to the preamble symbol, and result signal is transmitted through each transmit antenna. A receiving device receives the signal through each receive antenna, extracts a preamble symbol from the OFDM symbol, and multiplies local pseudo noise that corresponds to the pseudo noise used by the transmitting device and is shifted by the extracted preamble symbol. A timing error is estimated and compensated according to the correlation of the pseudo noise of the transmitting device and the local pseudo noise of the receiving device. A frequency offset is estimated and compensated according to the phase difference between the preamble symbols. Therefore, the system is realized in a simpler manner and timing error and frequency offset estimation and compensation performance is further improved.

摘要翻译： 本发明涉及用于估计MIMO移动通信系统中的定时误差和频率偏移的方法和装置。 在包括多个发送天线和多个接收天线的系统中，将预定的前导码符号插入由发送装置发送的帧中，并将伪噪声与前导符号相乘，并且通过每个发送结果信号发送结果信号 发射天线。 接收装置通过每个接收天线接收信号，从OFDM符号中提取前导码符号，并且乘以对应于由发送装置使用的伪噪声并被所提取的前导符号移位的本地伪噪声。 根据发送装置的伪噪声与接收装置的本地伪噪声的相关性来估计和补偿定时误差。 根据前导符号之间的相位差来估计和补偿频率偏移。 因此，系统以简单的方式实现，进一步提高了定时误差和频偏估计和补偿性能。