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1. 发明授权

US08553814B2 Rapid sampling phase recovery 有权
标题翻译：快速采样相恢复
公开(公告)号：US08553814B2
公开(公告)日：2013-10-08
申请号：US12533568
申请日：2009-07-31
申请人： Albert Molina , Oisin Ó Cuanacháin , Ramon Sanchez
发明人： Albert Molina , Oisin Ó Cuanacháin , Ramon Sanchez
IPC分类号： H04L27/06
CPC分类号： H04L7/10 , H03L7/0807 , H03L7/093 , H03L7/1075 , H04L7/0331 , H04L7/048
摘要： In a communication receiver, timing recovery circuitry includes a loop filter associated with a timing recovery loop of a first communication device. The first communication device is in communication with a second communication device prior to a temporary power down/power up sequence in the first communication device. The loop filter is configured to: (i) temporarily disable at least a portion of the timing recovery loop after the temporary power down/power up sequence in the first communication device; and (ii) initiate a progression through a set of potential sampling phases to determine a given sampling phase at which the first communication device can recommence communication with the second communication device.
摘要翻译：在通信接收机中，定时恢复电路包括与第一通信设备的定时恢复环路相关联的环路滤波器。第一通信设备在第一通信设备中的临时断电/上电序列之前与第二通信设备通信。环路滤波器被配置为：（i）在第一通信设备中的临时断电/上电序列之后临时禁用定时恢复环路的至少一部分; 以及（ii）通过一组潜在的采样阶段启动进展，以确定第一通信设备可以重新开始与第二通信设备的通信的给定采样阶段。

2. 发明申请

US20110026650A1 Rapid Sampling Phase Recovery 有权
标题翻译：快速采样相恢复
公开(公告)号：US20110026650A1
公开(公告)日：2011-02-03
申请号：US12533568
申请日：2009-07-31
申请人： Albert Molina , Oisin Ó Cuanacháin , Ramon Sanchez
发明人： Albert Molina , Oisin Ó Cuanacháin , Ramon Sanchez
IPC分类号： H04L7/00 , H04L27/06
CPC分类号： H04L7/10 , H03L7/0807 , H03L7/093 , H03L7/1075 , H04L7/0331 , H04L7/048
摘要： In a communication receiver, timing recovery circuitry includes a loop filter associated with a timing recovery loop of a first communication device. The first communication device is in communication with a second communication device prior to a temporary power down/power up sequence in the first communication device. The loop filter is configured to: (i) temporarily disable at least a portion of the timing recovery loop after the temporary power down/power up sequence in the first communication device; and (ii) initiate a progression through a set of potential sampling phases to determine a given sampling phase at which the first communication device can recommence communication with the second communication device.
摘要翻译：在通信接收机中，定时恢复电路包括与第一通信设备的定时恢复环路相关联的环路滤波器。第一通信设备在第一通信设备中的临时断电/上电序列之前与第二通信设备通信。环路滤波器被配置为：（i）在第一通信设备中的临时断电/上电序列之后临时禁用定时恢复环路的至少一部分; 以及（ii）通过一组潜在的采样阶段启动进展，以确定第一通信设备可以重新开始与第二通信设备的通信的给定采样阶段。

3. 发明授权

US08515376B2 Receiver and method for estimating a plurality of estimated transfer functions corresponding to wireless channels in a multiple-input system 有权
标题翻译：用于估计与多输入系统中的无线信道相对应的多个估计传递函数的接收器和方法
公开(公告)号：US08515376B2
公开(公告)日：2013-08-20
申请号：US13617229
申请日：2012-09-14
申请人： Kameran Azadet , Samer Hijazi , Sunitha Kopparthi , Albert Molina , Ramon Sanchez
发明人： Kameran Azadet , Samer Hijazi , Sunitha Kopparthi , Albert Molina , Ramon Sanchez
IPC分类号： H04B1/06
CPC分类号： H04L25/0202 , H04L1/0631 , H04L1/20 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/021 , H04L25/022 , H04L25/023 , H04L25/025
摘要： In one embodiment, a receiver is provided for use in a multiple-input system that includes a receiving antenna receiving a time-domain signal corresponding to a plurality of signals transmitted from a plurality of transmitting antennas. The receiver includes: (a) a transform unit adapted to transform the time-domain signal into a frequency-domain signal; (b) a channel estimation unit adapted to estimate, based on the frequency-domain signal and a frequency-domain pilot signal, a combined transfer function corresponding to a plurality of transfer functions of respective channels between the plurality of transmitting antennas and the receiving antenna; and (c) a channel separation unit including a plurality of frequency-domain convolution units that separate the combined transfer function into a plurality of estimated channel transfer functions.
摘要翻译：在一个实施例中，提供接收机用于多输入系统，该多输入系统包括接收天线，其接收与从多个发射天线发射的多个信号相对应的时域信号。接收机包括：（a）适于将时域信号变换为频域信号的变换单元; （b）信道估计单元，适于基于频域信号和频域导频信号估计与多个发射天线和接收天线之间的各个信道的多个传递函数相对应的组合传递函数 ; 以及（c）信道分离单元，其包括将所述组合传递函数分离成多个估计信道传递函数的多个频域卷积单元。

4. 发明申请

US20110051867A1 METHODS AND APPARATUS FOR WIRELESS CHANNEL ESTIMATION USING INTERPOLATION ELIMINATION IN THE EIGEN DOMAIN 有权
标题翻译：用于在EIGEN域中使用插值消除的无线信道估计的方法和装置
公开(公告)号：US20110051867A1
公开(公告)日：2011-03-03
申请号：US12547298
申请日：2009-08-25
申请人： Kameran Azadet , Samer Hijazi , Albert Molina , Joe H. Othmer , Ramon Sanchez
发明人： Kameran Azadet , Samer Hijazi , Albert Molina , Joe H. Othmer , Ramon Sanchez
IPC分类号： H04B1/10
CPC分类号： H04L25/0232 , H04L2025/03414
摘要： Methods and apparatus are provided for wireless channel estimation using interpolation elimination in the Eigen domain. Channel components at known OFDM symbol locations are interpolated to other OFDM symbol locations. Methods and apparatus are provided for interpolating in the Eigen domain between reference signals (i.e., training signals) to estimate the equalizer coefficients with a reduced complexity. In particular, one aspect of the present invention performs the required interpolation before a required matrix inversion in the Eigen domain.
摘要翻译：提供了在本征域中使用内插消除的无线信道估计的方法和装置。已知OFDM符号位置处的信道分量被内插到其他OFDM符号位置。提供了用于在参考信号（即，训练信号）之间的本征域内插入以降低复杂度来估计均衡器系数的方法和装置。特别地，本发明的一个方面在本征域中的所需矩阵求逆之前执行所需的插值。

5. 发明申请

US20100197264A1 UPLINK CHANNEL ESTIMATION 有权
标题翻译：上行通道估计
公开(公告)号：US20100197264A1
公开(公告)日：2010-08-05
申请号：US12365444
申请日：2009-02-04
申请人： Kameran Azadet , Samer Hijazi , Sunitha Kopparthi , Albert Molina , Ramon Sanchez
发明人： Kameran Azadet , Samer Hijazi , Sunitha Kopparthi , Albert Molina , Ramon Sanchez
IPC分类号： H04B1/06
CPC分类号： H04L25/0202 , H04L1/0631 , H04L1/20 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/021 , H04L25/022 , H04L25/023 , H04L25/025
摘要： In one embodiment, a receiver is provided for use in a multiple-input system that includes a receiving antenna receiving a time-domain signal corresponding to a plurality of signals transmitted from a plurality of transmitting antennas. The receiver includes: (a) a transform unit adapted to transform the time-domain signal into a frequency-domain signal; (b) a channel estimation unit adapted to estimate, based on the frequency-domain signal and a frequency-domain pilot signal, a combined transfer function corresponding to a plurality of transfer functions of respective channels between the plurality of transmitting antennas and the receiving antenna; and (c) a channel separation unit including a plurality of frequency-domain convolution units that separate the combined transfer function into a plurality of estimated channel transfer functions.
摘要翻译：在一个实施例中，提供接收机用于多输入系统，该多输入系统包括接收天线，其接收与从多个发射天线发射的多个信号相对应的时域信号。接收机包括：（a）适于将时域信号变换为频域信号的变换单元; （b）信道估计单元，适于基于频域信号和频域导频信号估计与多个发射天线和接收天线之间的各个信道的多个传递函数相对应的组合传递函数 ; 以及（c）信道分离单元，其包括将所述组合传递函数分离成多个估计信道传递函数的多个频域卷积单元。

6. 发明申请

US20090083352A1 METHODS AND APPARATUS FOR PERFORMING REDUCED COMPLEXITY DISCRETE FOURIER TRANSFORMS USING INTERPOLATION 有权
标题翻译：使用插值执行降低复杂度离散傅立叶变换的方法和装置
公开(公告)号：US20090083352A1
公开(公告)日：2009-03-26
申请号：US11859437
申请日：2007-09-21
申请人： Kameran Azadet , Samer Hijazi , Sunitha Kopparthi , Albert Molina , Ramon Sanchez
发明人： Kameran Azadet , Samer Hijazi , Sunitha Kopparthi , Albert Molina , Ramon Sanchez
IPC分类号： G06F17/17 , G06F17/14
CPC分类号： G06F17/141
摘要： Methods and apparatus arc provided for performing reduced complexity discrete Fourier transforms using interpolation An input sequence of length N is transformed by extending the input sequence to an extended input sequence of length M, where M is greater than N (a power of two greater than N); performing a discrete Fourier Transform (DFT), such as a power-of-two DFT, on the extended input sequence to obtain an interpolated sequence; and applying a conversion matrix to the interpolated sequence to obtain a DFT output for the input sequence of length N. The input sequence of length N can be extended to an extended input sequence of length M, for example, by employing a zero padding technique, a cyclic extension technique, a windowing of a cyclic extended sequence technique or a resampling-based interpolation technique to extend the input sequence The conversion matrix is substantially a spar se matrix.
摘要翻译：提供用于使用插值执行降低复杂度的离散傅立叶变换的方法和装置通过将输入序列扩展到长度为M的扩展输入序列来变换长度为N的输入序列，其中M大于N（功率大于N ）; 在扩展输入序列上执行离散傅立叶变换（DFT），例如二次幂DFT，以获得内插序列; 以及将转换矩阵应用到内插序列以获得长度为N的输入序列的DFT输出。例如，通过采用零填充技术，长度N的输入序列可以扩展到长度为M的扩展输入序列，循环扩展技术，循环扩展序列技术的开窗或基于重新采样的插值技术来扩展输入序列。转换矩阵基本上是一个spar se矩阵。

7. 发明授权

US09942078B2 Methods and apparatus for simultaneous estimation of frequency offset and channel response for MU-MIMO OFDMA 有权
公开(公告)号：US09942078B2
公开(公告)日：2018-04-10
申请号：US12474344
申请日：2009-05-29
申请人： Kameran Azadet , Samer Hijazi , Albert Molina , Ramon Sanchez
发明人： Kameran Azadet , Samer Hijazi , Albert Molina , Ramon Sanchez
IPC分类号： H04L27/26 , H04L25/02
CPC分类号： H04L27/2657 , H04L25/0202 , H04L27/2675 , H04L27/2695
摘要： Methods and apparatus are provided for simultaneous estimation of frequency offset and channel response for a communication system, such as a MU-MIMO communication system. An iterative method is provided for estimating frequency offset and channel response for a plurality of frequency resources. The channel response is estimated for a set of users sharing a given one of the frequency resources. In addition, the frequency offset is estimated for the users in the set, wherein the channel response and frequency offset of users not in the set are maintained at their latest updated values. Initially, the channel response of a user can be an ideal channel response and the frequency offset can be approximately zero.

8. 发明授权

US08385489B2 Methods and apparatus for wireless channel estimation using interpolation elimination in the Eigen domain 有权
标题翻译：在本征域中使用内插消除的无线信道估计的方法和装置
公开(公告)号：US08385489B2
公开(公告)日：2013-02-26
申请号：US12547298
申请日：2009-08-25
申请人： Kameran Azadet , Samer Hijazi , Albert Molina , Joe H. Othmer , Ramon Sanchez
发明人： Kameran Azadet , Samer Hijazi , Albert Molina , Joe H. Othmer , Ramon Sanchez
IPC分类号： H04B1/10
CPC分类号： H04L25/0232 , H04L2025/03414
摘要： Methods and apparatus are provided for wireless channel estimation using interpolation elimination in the Eigen domain. Channel components at known OFDM symbol locations are interpolated to other OFDM symbol locations. Methods and apparatus are provided for interpolating in the Eigen domain between reference signals (i.e., training signals) to estimate the equalizer coefficients with a reduced complexity. In particular, one aspect of the present invention performs the required interpolation before a required matrix inversion in the Eigen domain.
摘要翻译：提供了在本征域中使用内插消除的无线信道估计的方法和装置。已知OFDM符号位置处的信道分量被内插到其他OFDM符号位置。提供了用于在参考信号（即，训练信号）之间的本征域内插入以降低复杂度来估计均衡器系数的方法和装置。特别地，本发明的一个方面在本征域中的所需矩阵求逆之前执行所需的插值。

9. 发明授权

US08290462B2 Receiver and method for estimating a plurality of estimated transfer functions corresponding to wireless channels in a multiple-input system 有权
标题翻译：用于估计与多输入系统中的无线信道相对应的多个估计传递函数的接收器和方法
公开(公告)号：US08290462B2
公开(公告)日：2012-10-16
申请号：US12365444
申请日：2009-02-04
申请人： Kameran Azadet , Samer Hijazi , Sunitha Kopparthi , Albert Molina , Ramon Sanchez
发明人： Kameran Azadet , Samer Hijazi , Sunitha Kopparthi , Albert Molina , Ramon Sanchez
IPC分类号： H04B1/06
CPC分类号： H04L25/0202 , H04L1/0631 , H04L1/20 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/021 , H04L25/022 , H04L25/023 , H04L25/025
摘要： In one embodiment, a receiver is provided for use in a multiple-input system that includes a receiving antenna receiving a time-domain signal corresponding to a plurality of signals transmitted from a plurality of transmitting antennas. The receiver includes: (a) a transform unit adapted to transform the time-domain signal into a frequency-domain signal; (b) a channel estimation unit adapted to estimate, based on the frequency-domain signal and a frequency-domain pilot signal, a combined transfer function corresponding to a plurality of transfer functions of respective channels between the plurality of transmitting antennas and the receiving antenna; and (c) a channel separation unit including a plurality of frequency-domain convolution units that separate the combined transfer function into a plurality of estimated channel transfer functions.
摘要翻译：在一个实施例中，提供接收机用于多输入系统，该多输入系统包括接收天线，其接收与从多个发射天线发射的多个信号相对应的时域信号。接收机包括：（a）适于将时域信号变换为频域信号的变换单元; （b）信道估计单元，适于基于频域信号和频域导频信号估计与多个发射天线和接收天线之间的各个信道的多个传递函数相对应的组合传递函数 ; 以及（c）信道分离单元，其包括将所述组合传递函数分离成多个估计信道传递函数的多个频域卷积单元。

10. 发明申请

US20130028342A1 UPLINK CHANNEL ESTIMATION 有权
标题翻译：上行通道估计
公开(公告)号：US20130028342A1
公开(公告)日：2013-01-31
申请号：US13617229
申请日：2012-09-14
申请人： Kameran Azadet , Samer Hijazi , Sunitha Kopparthi , Albert Molina , Ramon Sanchez
发明人： Kameran Azadet , Samer Hijazi , Sunitha Kopparthi , Albert Molina , Ramon Sanchez
IPC分类号： H04B7/08
CPC分类号： H04L25/0202 , H04L1/0631 , H04L1/20 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/021 , H04L25/022 , H04L25/023 , H04L25/025
摘要： In one embodiment, a receiver is provided for use in a multiple-input system that includes a receiving antenna receiving a time-domain signal corresponding to a plurality of signals transmitted from a plurality of transmitting antennas. The receiver includes: (a) a transform unit adapted to transform the time-domain signal into a frequency-domain signal; (b) a channel estimation unit adapted to estimate, based on the frequency-domain signal and a frequency-domain pilot signal, a combined transfer function corresponding to a plurality of transfer functions of respective channels between the plurality of transmitting antennas and the receiving antenna; and (c) a channel separation unit including a plurality of frequency-domain convolution units that separate the combined transfer function into a plurality of estimated channel transfer functions.
摘要翻译：在一个实施例中，提供接收机用于多输入系统，该多输入系统包括接收天线，其接收与从多个发射天线发射的多个信号相对应的时域信号。接收机包括：（a）适于将时域信号变换为频域信号的变换单元; （b）信道估计单元，适于基于频域信号和频域导频信号估计与多个发射天线和接收天线之间的各个信道的多个传递函数相对应的组合传递函数 ; 以及（c）信道分离单元，其包括将所述组合传递函数分离成多个估计信道传递函数的多个频域卷积单元。

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