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    Method and apparatus for estimating frequency offset and timing offset of one or more mobile stations (MSs)
    1.
    发明申请
    Method and apparatus for estimating frequency offset and timing offset of one or more mobile stations (MSs) 有权
    用于估计一个或多个移动站（MS）的频率偏移和定时偏移的方法和装置

    公开(公告)号：US20080273621A1

    公开(公告)日：2008-11-06

    申请号：US12004570

    申请日：2007-12-21

    申请人： Rajesh Raja Manakkal ,  Louay Jalloul ,  Sam P. Alex ,  Anupama Lakshmanan ,  Diordje Tujkovic ,  Sriram Mudulodu

    发明人： Rajesh Raja Manakkal ,  Louay Jalloul ,  Sam P. Alex ,  Anupama Lakshmanan ,  Diordje Tujkovic ,  Sriram Mudulodu

    IPC分类号： H04B7/02

    CPC分类号： H04L27/2662 ,  H04L5/0007 ,  H04L5/0051 ,  H04L27/2657 ,  H04L27/2675

    摘要： A method and apparatus for estimating frequency offset and timing offset of a first Mobile Station (MS) in a communication system is provided. The method includes receiving a composite signal at a plurality of receiver antennas of a Base Transceiver Station (BTS). The composite signal includes a first signal transmitted from a first MS and a second signal transmitted from a second MS. The composite signal includes one or more tiles. Each tile includes a plurality of data sub-carriers, a plurality of first pilot sub-carriers, and a plurality of second pilot sub-carriers. A total phase offset of the first MS is estimated based on a complex conjugate product of pilot symbols of the plurality of first pilot sub-carriers. Thereafter, a first phase offset corresponding to the timing offset of the first MS is estimated based on a Power Delay Profile (PDP) of one or more first pilot sub-carriers. Finally, a second phase offset corresponding to the frequency offset of the first MS is determined based on the total phase offset and the first phase offset.

    摘要翻译： 提供了一种用于估计通信系统中的第一移动站（MS）的频率偏移和定时偏移的方法和装置。 该方法包括在基站收发台（BTS）的多个接收机天线处接收复合信号。 复合信号包括从第一MS发送的第一信号和从第二MS发送的第二信号。 复合信号包括一个或多个瓦片。 每个瓦片包括多个数据副载波，多个第一导频子载波和多个第二导频子载波。 基于多个第一导频子载波的导频符号的复共轭乘积来估计第一MS的总相位偏移。 此后，基于一个或多个第一导频子载波的功率延迟曲线（PDP）来估计与第一MS的定时偏移相对应的第一相位偏移。 最后，基于总相位偏移和第一相位偏移来确定与第一MS的频率偏移相对应的第二相位偏移。

    Method and apparatus for estimating frequency offset and timing offset of one or more mobile stations
    3.
    发明授权
    Method and apparatus for estimating frequency offset and timing offset of one or more mobile stations 失效
    用于估计一个或多个移动台的频率偏移和定时偏移的方法和装置

    公开(公告)号：US08139667B2

    公开(公告)日：2012-03-20

    申请号：US12951185

    申请日：2010-11-22

    申请人： Rajesh Raja Manakkal ,  Louay Jalloul ,  Sam P. Alex ,  Anupama Lakshmanan ,  Djordje Tujkovic ,  Sriram Mudulodu

    发明人： Rajesh Raja Manakkal ,  Louay Jalloul ,  Sam P. Alex ,  Anupama Lakshmanan ,  Djordje Tujkovic ,  Sriram Mudulodu

    IPC分类号： H04L27/28

    CPC分类号： H04L27/2662 ,  H04L5/0007 ,  H04L5/0051 ,  H04L27/2657 ,  H04L27/2675

    摘要： A method and apparatus for estimating frequency offset and timing offset of a first Mobile Station (MS) in a communication system is provided. The method includes receiving a composite signal at a plurality of receiver antennas of a Base Transceiver Station (BTS). The composite signal includes a first signal transmitted from a first MS and a second signal transmitted from a second MS. The composite signal includes one or more tiles. Each tile includes a plurality of data sub-carriers, a plurality of first pilot sub-carriers, and a plurality of second pilot sub-carriers. A total phase offset of the first MS is estimated based on a complex conjugate product of pilot symbols of the plurality of first pilot sub-carriers. Thereafter, a first phase offset corresponding to the timing offset of the first MS is estimated based on a Power Delay Profile (PDP) of one or more first pilot sub-carriers. Finally, a second phase offset corresponding to the frequency offset of the first MS is determined based on the total phase offset and the first phase offset.

    摘要翻译： 提供了一种用于估计通信系统中的第一移动站（MS）的频率偏移和定时偏移的方法和装置。 该方法包括在基站收发台（BTS）的多个接收机天线处接收复合信号。 复合信号包括从第一MS发送的第一信号和从第二MS发送的第二信号。 复合信号包括一个或多个瓦片。 每个瓦片包括多个数据副载波，多个第一导频子载波和多个第二导频子载波。 基于多个第一导频子载波的导频符号的复共轭乘积来估计第一MS的总相位偏移。 此后，基于一个或多个第一导频子载波的功率延迟曲线（PDP）来估计与第一MS的定时偏移相对应的第一相位偏移。 最后，基于总相位偏移和第一相位偏移来确定与第一MS的频率偏移相对应的第二相位偏移。

    Method and apparatus for estimating frequency offset and timing offset of one or more mobile stations (MSs)
    4.
    发明授权
    Method and apparatus for estimating frequency offset and timing offset of one or more mobile stations (MSs) 有权
    用于估计一个或多个移动站（MS）的频率偏移和定时偏移的方法和装置

    公开(公告)号：US07852909B2

    公开(公告)日：2010-12-14

    申请号：US12004570

    申请日：2007-12-21

    申请人： Rajesh Raja Manakkal ,  Louay Jalloul ,  Sam P. Alex ,  Anupama Lakshmanan ,  Djordje Tujkovic ,  Sriram Mudulodu

    发明人： Rajesh Raja Manakkal ,  Louay Jalloul ,  Sam P. Alex ,  Anupama Lakshmanan ,  Djordje Tujkovic ,  Sriram Mudulodu

    IPC分类号： H04B1/38

    CPC分类号： H04L27/2662 ,  H04L5/0007 ,  H04L5/0051 ,  H04L27/2657 ,  H04L27/2675

    摘要： A method and apparatus for estimating frequency offset and timing offset of a first Mobile Station (MS) in a communication system is provided. The method includes receiving a composite signal at a plurality of receiver antennas of a Base Transceiver Station (BTS). The composite signal includes a first signal transmitted from a first MS and a second signal transmitted from a second MS. The composite signal includes one or more tiles. Each tile includes a plurality of data sub-carriers, a plurality of first pilot sub-carriers, and a plurality of second pilot sub-carriers. A total phase offset of the first MS is estimated based on a complex conjugate product of pilot symbols of the plurality of first pilot sub-carriers. Thereafter, a first phase offset corresponding to the timing offset of the first MS is estimated based on a Power Delay Profile (PDP) of one or more first pilot sub-carriers. Finally, a second phase offset corresponding to the frequency offset of the first MS is determined based on the total phase offset and the first phase offset.

    摘要翻译： 提供了一种用于估计通信系统中的第一移动台（MS）的频率偏移和定时偏移的方法和装置。 该方法包括在基站收发台（BTS）的多个接收机天线处接收复合信号。 复合信号包括从第一MS发送的第一信号和从第二MS发送的第二信号。 复合信号包括一个或多个瓦片。 每个瓦片包括多个数据副载波，多个第一导频子载波和多个第二导频子载波。 基于多个第一导频子载波的导频符号的复共轭乘积来估计第一MS的总相位偏移。 此后，基于一个或多个第一导频子载波的功率延迟曲线（PDP）来估计与第一MS的定时偏移相对应的第一相位偏移。 最后，基于总相位偏移和第一相位偏移来确定与第一MS的频率偏移相对应的第二相位偏移。

    Methods and systems for channel estimation in a collaborative Multi Input Multiple Output (MIMO) communication system
    6.
    发明申请
    Methods and systems for channel estimation in a collaborative Multi Input Multiple Output (MIMO) communication system 失效
    协作多输入多输出（MIMO）通信系统中信道估计的方法和系统

    公开(公告)号：US20080273453A1

    公开(公告)日：2008-11-06

    申请号：US11823763

    申请日：2007-06-28

    申请人： Rajesh Raja Manakkal ,  Sam P. Alex ,  Louay Jalloul

    发明人： Rajesh Raja Manakkal ,  Sam P. Alex ,  Louay Jalloul

    IPC分类号： H04J11/00 ,  H04B7/02 ,  H04B7/216

    CPC分类号： H04B7/0697 ,  H04B7/04 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0224

    摘要： Methods and systems for estimating channel of one or more MSs in a collaborative MIMO communication system are provided. The method includes receiving a signal transmitted from a transmit antenna of a first MS and a transmit antenna of a second MS at a BTS using one or more receiver antennas. The method further includes computing one or more conjugate products for each of the first MS and the second MS using the signal. Thereafter, an average is determined over the plurality of receiver antennas and the plurality of tiles of the plurality of conjugate products for each of the first MS and the second MS. A phase determined based on the average of the plurality of conjugate products for the first MS and the second MS is divided into a first phase and a second phase for each of the first MS and the second MS. Additionally, the method includes determining a channel estimate for each tile of the first MS and the second MS at each receiver antennas. The method further includes performing predefined computations on the channel estimate of each tile of the first MS and the second MS at each receiver antenna of the BTS using the corresponding first phase and the corresponding second phase.

    摘要翻译： 提供了用于估计协作MIMO通信系统中的一个或多个MS的信道的方法和系统。 该方法包括使用一个或多个接收机天线在BTS处接收从第一MS的发射天线和第二MS的发射天线发射的信号。 该方法还包括使用该信号来计算第一MS和第二MS中的每一个的一个或多个共轭乘积。 此后，对于第一MS和第二MS中的每一个，确定多个接收机天线和多个共轭乘积中的多个瓦片的平均值。 基于第一MS和第二MS的多个共轭乘积的平均值确定的相位被分成第一MS和第二MS中的每一个的第一相位和第二相位。 另外，该方法包括在每个接收机天线处确定第一MS和第二MS的每个瓦片的信道估计。 该方法还包括使用对应的第一阶段和对应的第二阶段，在BTS的每个接收机天线对第一MS和第二MS的每个频块的信道估计执行预定义的计算。

    Method and Apparatus for Estimating Frequency Offset and Timing Offset of One or More Mobile Stations
    7.
    发明申请
    Method and Apparatus for Estimating Frequency Offset and Timing Offset of One or More Mobile Stations 失效
    用于估计一个或多个移动台的频偏和定时偏移的方法和装置

    公开(公告)号：US20110069793A1

    公开(公告)日：2011-03-24

    申请号：US12951185

    申请日：2010-11-22

    申请人： Rajesh Raja Manakkal ,  Louay Jalloul ,  Sam P. Alex

    发明人： Rajesh Raja Manakkal ,  Louay Jalloul ,  Sam P. Alex

    IPC分类号： H04L27/06

    CPC分类号： H04L27/2662 ,  H04L5/0007 ,  H04L5/0051 ,  H04L27/2657 ,  H04L27/2675

    摘要： A method and apparatus for estimating frequency offset and timing offset of a first Mobile Station (MS) in a communication system is provided. The method includes receiving a composite signal at a plurality of receiver antennas of a Base Transceiver Station (BTS). The composite signal includes a first signal transmitted from a first MS and a second signal transmitted from a second MS. The composite signal includes one or more tiles. Each tile includes a plurality of data sub-carriers, a plurality of first pilot sub-carriers, and a plurality of second pilot sub-carriers. A total phase offset of the first MS is estimated based on a complex conjugate product of pilot symbols of the plurality of first pilot sub-carriers. Thereafter, a first phase offset corresponding to the timing offset of the first MS is estimated based on a Power Delay Profile (PDP) of one or more first pilot sub-carriers. Finally, a second phase offset corresponding to the frequency offset of the first MS is determined based on the total phase offset and the first phase offset.

    摘要翻译： 提供了一种用于估计通信系统中的第一移动站（MS）的频率偏移和定时偏移的方法和装置。 该方法包括在基站收发台（BTS）的多个接收机天线处接收复合信号。 复合信号包括从第一MS发送的第一信号和从第二MS发送的第二信号。 复合信号包括一个或多个瓦片。 每个瓦片包括多个数据副载波，多个第一导频子载波和多个第二导频子载波。 基于多个第一导频子载波的导频符号的复共轭乘积来估计第一MS的总相位偏移。 此后，基于一个或多个第一导频子载波的功率延迟曲线（PDP）来估计与第一MS的定时偏移相对应的第一相位偏移。 最后，基于总相位偏移和第一相位偏移来确定与第一MS的频率偏移相对应的第二相位偏移。

    Methods and systems for channel estimation in a collaborative multi input multiple output (MIMO) communication system
    8.
    发明授权
    Methods and systems for channel estimation in a collaborative multi input multiple output (MIMO) communication system 失效
    协作多输入多输出（MIMO）通信系统中信道估计的方法和系统

    公开(公告)号：US07680027B2

    公开(公告)日：2010-03-16

    申请号：US11823763

    申请日：2007-06-28

    申请人： Rajesh Raja Manakkal ,  Sam P. Alex ,  Louay Jalloul

    发明人： Rajesh Raja Manakkal ,  Sam P. Alex ,  Louay Jalloul

    IPC分类号： H04J11/00 ,  H04L5/12 ,  H04L5/16 ,  H04W4/00 ,  H04J1/00 ,  H04B1/38

    CPC分类号： H04B7/0697 ,  H04B7/04 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0224

    摘要： Methods and systems for estimating channel of one or more MSs in a collaborative MIMO communication system are provided. The method includes receiving a signal transmitted from a transmit antenna of a first MS and a transmit antenna of a second MS at a BTS using one or more receiver antennas. The method further includes computing one or more conjugate products for each of the first MS and the second MS using the signal. Thereafter, an average is determined over the plurality of receiver antennas and the plurality of tiles of the plurality of conjugate products for each of the first MS and the second MS. A phase determined based on the average of the plurality of conjugate products for the first MS and the second MS is divided into a first phase and a second phase for each of the first MS and the second MS. Additionally, the method includes determining a channel estimate for each tile of the first MS and the second MS at each receiver antennas. The method further includes performing predefined computations on the channel estimate of each tile of the first MS and the second MS at each receiver antenna of the BTS using the corresponding first phase and the corresponding second phase.

    摘要翻译： 提供了用于估计协作MIMO通信系统中的一个或多个MS的信道的方法和系统。 该方法包括使用一个或多个接收机天线在BTS处接收从第一MS的发射天线和第二MS的发射天线发射的信号。 该方法还包括使用该信号来计算第一MS和第二MS中的每一个的一个或多个共轭乘积。 此后，对于第一MS和第二MS中的每一个，确定多个接收机天线和多个共轭乘积中的多个瓦片的平均值。 基于第一MS和第二MS的多个共轭乘积的平均值确定的相位被分成第一MS和第二MS中的每一个的第一相位和第二相位。 另外，该方法包括在每个接收机天线处确定第一MS和第二MS的每个瓦片的信道估计。 该方法还包括使用对应的第一阶段和对应的第二阶段，在BTS的每个接收机天线对第一MS和第二MS的每个频块的信道估计执行预定义的计算。

    Method and system for estimating channel of a mobile station in a communication system
    9.
    发明申请
    Method and system for estimating channel of a mobile station in a communication system 有权
    用于估计通信系统中移动站的信道的方法和系统

    公开(公告)号：US20090069022A1

    公开(公告)日：2009-03-12

    申请号：US11900499

    申请日：2007-09-12

    申请人： Rajesh Raja Manakkal ,  Sam P. Alex ,  Louay Jalloul

    发明人： Rajesh Raja Manakkal ,  Sam P. Alex ,  Louay Jalloul

    IPC分类号： H04Q7/20

    CPC分类号： H04L27/2647 ,  H04L5/0019 ,  H04L25/0226 ,  H04L27/2613

    摘要： A method of estimating a channel between a desired Mobile Station (MS) and a Base Transceiver Station (BTS) antenna of a one of a plurality of sectors of a BTS. The method includes receiving a composite signal at the BTS antenna. The composite signal comprises a desired MS signal and an interfering MS signal. Thereafter, a known desired random sequence and a known interfering random sequence is applied to pilot symbols of the composite signal, resulting in a first de-randomized signal and a second de-randomized signal. Finally, the channel estimate is obtained by weighting and summing the first de-randomized signal and second de-randomized signal.

    摘要翻译： 一种用于估计BTS的多个扇区之一的所需移动台（MS）和基站收发台（BTS）天线之间的信道的方法。 该方法包括在BTS天线处接收复合信号。 复合信号包括期望的MS信号和干扰MS信号。 此后，将已知的所需随机序列和已知的干扰随机序列应用于复合信号的导频符号，产生第一去随机信号和第二去随机化信号。 最后，通过对第一去随机化信号和第二去随机化信号进行加权和求和来获得信道估计。

    Method and system for estimating channel of a mobile station in a communication system
    10.
    发明授权
    Method and system for estimating channel of a mobile station in a communication system 有权
    用于估计通信系统中移动站的信道的方法和系统

    公开(公告)号：US07916774B2

    公开(公告)日：2011-03-29

    申请号：US11900499

    申请日：2007-09-12

    申请人： Rajesh Raja Manakkal ,  Sam P. Alex ,  Louay Jalloul

    发明人： Rajesh Raja Manakkal ,  Sam P. Alex ,  Louay Jalloul

    IPC分类号： H04B1/38

    CPC分类号： H04L27/2647 ,  H04L5/0019 ,  H04L25/0226 ,  H04L27/2613

    摘要： A method of estimating a channel between a desired Mobile Station (MS) and a Base Transceiver Station (BTS) antenna of a one of a plurality of sectors of a BTS. The method includes receiving a composite signal at the BTS antenna. The composite signal comprises a desired MS signal and an interfering MS signal. Thereafter, a known desired random sequence and a known interfering random sequence is applied to pilot symbols of the composite signal, resulting in a first de-randomized signal and a second de-randomized signal. Finally, the channel estimate is obtained by weighting and summing the first de-randomized signal and second de-randomized signal.

    摘要翻译： 一种用于估计BTS的多个扇区之一的所需移动台（MS）和基站收发台（BTS）天线之间的信道的方法。 该方法包括在BTS天线处接收复合信号。 复合信号包括期望的MS信号和干扰MS信号。 此后，将已知的所需随机序列和已知的干扰随机序列应用于复合信号的导频符号，产生第一去随机信号和第二去随机化信号。 最后，通过对第一去随机化信号和第二去随机化信号进行加权和求和来获得信道估计。