公开(公告)号：US08867629B2

公开(公告)日：2014-10-21

申请号：US13442248

申请日：2012-04-09

申请人： Anand G. Dabak ,  Gang Xu

发明人： Anand G. Dabak ,  Gang Xu

IPC分类号： H04B3/00 ,  H04B3/54

CPC分类号： H04B3/54 ,  H04B2203/542

摘要： A method of power line communications includes obtaining timing information for an AC mains signal transmitted on a power line in a power line communication (PLC) system that includes at least one receiver and at least one other device connected on the power line which provides variable loading during cycles of the AC mains signal. A first loading interval within at least a first cycle of the cycles having lower loading and at least a second loading interval within said first cycle having higher loading are identified using the timing information. At least one data packet is transmitted only during the first loading interval over the power line to the receiver.

摘要翻译： 电力线通信的方法包括获得在包括至少一个接收器的电力线通信（PLC）系统中的电力线上传输的AC电力信号的定时信息，以及连接在电力线上的至少一个其他设备，其提供可变负载 在交流电源信号的周期。 使用定时信息来识别在具有较高负载的所述第一周期内具有较低负载和至少第二负载间隔的周期的至少第一周期内的第一加载间隔。 至少一个数据分组仅在电力线上的第一加载间隔期间被发送到接收机。

公开(公告)号：US08830984B2

公开(公告)日：2014-09-09

申请号：US13437719

申请日：2012-04-02

申请人： Anand G. Dabak ,  Eko N. Onggosanusi ,  Badri Varadarajan

发明人： Anand G. Dabak ,  Eko N. Onggosanusi ,  Badri Varadarajan

IPC分类号： H04J3/06 ,  H04K1/04 ,  H04L9/12 ,  H04B7/26 ,  H04W56/00 ,  H04J11/00

CPC分类号： H04W56/001 ,  H04B7/2681 ,  H04J11/0069 ,  H04J2011/0096 ,  H04L9/12 ,  H04L2209/80 ,  H04W36/0016 ,  H04W56/0015

摘要： Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter includes a synchronization unit configured to provide a primary synchronization signal and a secondary synchronization signal having first and second segments. The transmitter also includes a secondary scrambling unit configured to provide a scrambled secondary synchronization signal, wherein scrambling agents for the first and second segments are derived from a primary synchronization sequence of the primary synchronization signal. The secondary scrambling unit is further configured to provide an additional scrambling of one of the first and second segments, wherein a second scrambling agent is derived from the remaining segment of a secondary synchronization sequence of the secondary synchronization signal. The transmitter further includes a transmit unit configured to transmit the primary synchronization signal and the scrambled secondary synchronization signal.

摘要翻译： 本公开的实施例提供发射机，接收机和操作发射机和接收机的方法。 在一个实施例中，发射机包括配置成提供主同步信号和具有第一和第二段的辅同步信号的同步单元。 发射机还包括辅助加扰单元，其被配置为提供加扰的次同步信号，其中第一和第二段的加扰代码从主同步信号的主同步序列导出。 次加扰单元还被配置为提供第一和第二段中的一个的附加加扰，其中从副同步信号的辅同步序列的剩余段导出第二加扰代码。 发射机还包括被配置为发送主同步信号和加扰的次同步信号的发射单元。

公开(公告)号：USRE44858E1

公开(公告)日：2014-04-22

申请号：US13136059

申请日：2011-07-20

申请人： Srinath Hosur ,  Anand G. Dabak

发明人： Srinath Hosur ,  Anand G. Dabak

IPC分类号： H04B7/185

CPC分类号： H04B7/0669 ,  H04B1/712 ,  H04B2201/70707 ,  H04W52/08 ,  H04W52/241 ,  H04W52/245 ,  H04W52/42

摘要： A circuit is designed with a measurement circuit (432). The measurement circuit is coupled to receive a first input signal (903) from a first antenna (128) of a transmitter and coupled to receive a second input signal (913) from a second antenna (130) of the transmitter. Each of the first and second signals is transmitted at a first time. The measurement circuit produces an output signal corresponding to a magnitude of the first and second signals. A control circuit (430) is coupled to receive the output signal and a reference signal. The control circuit is arranged to produce a control signal at a second time in response to a comparison of the output signal and the reference signal.

摘要翻译： 电路设计有测量电路（432）。 测量电路被耦合以从发射机的第一天线（128）接收第一输入信号（903），并被耦合以从发射机的第二天线（130）接收第二输入信号（913）。 第一和第二信号中的每一个在第一时间被发送。 测量电路产生对应于第一和第二信号的幅度的输出信号。 控制电路（430）被耦合以接收输出信号和参考信号。 控制电路被布置成响应于输出信号和参考信号的比较而在第二时间产生控制信号。

公开(公告)号：US08483327B2

公开(公告)日：2013-07-09

申请号：US12383154

申请日：2009-03-20

申请人： Timothy M. Schmidl ,  Ariel Zaltsman ,  Anand G. Dabak

发明人： Timothy M. Schmidl ,  Ariel Zaltsman ,  Anand G. Dabak

IPC分类号： H04L27/06

CPC分类号： H03M13/4115 ,  H03M13/09 ,  H03M13/356 ,  H03M13/4169

摘要： A convolutionally encoded frame to be decoded includes a first portion of bits having additional error protection and another portion without additional error protection. The decoding of the frame involves reverse Viterbi decoding or Viterbi decoding on a reversed bit sequence followed by applying a serial list Viterbi algorithm to the first portion. The result is that the list of probable sequences have unique sets of bits in the first portion.

摘要翻译： 要解码的卷积编码帧包括具有附加错误保护的第一部分位和不具有附加错误保护的另一部分。 该帧的解码涉及对反向比特序列的逆维特比解码或维特比解码，然后将序列表维特比算法应用于第一部分。 结果是可能序列的列表在第一部分中具有唯一的位集合。

公开(公告)号：US08379506B2

公开(公告)日：2013-02-19

申请号：US12571735

申请日：2009-10-01

申请人： Jaiganesh Balakrishnan ,  Anuj Batra ,  Anand G. Dabak

发明人： Jaiganesh Balakrishnan ,  Anuj Batra ,  Anand G. Dabak

IPC分类号： H04J11/00 ,  H04W4/00 ,  H04B7/216 ,  H04J4/00 ,  H04B1/00 ,  H04W72/00

CPC分类号： H04L5/023

摘要： System and method for providing multiple access in a multi-band, orthogonal frequency division multiplexed (multi-band-OFDM) communications system. A preferred embodiment comprises determining a transmission bandwidth to support a performance requirement and configuring transmission bands in the multi-band-OFDM communications system based upon the transmission bandwidth, wherein the transmission bands may be made up of smaller transmission bands bonded together. Further comprising initializing communications with the configured transmission bands. The use of bonded transmission bands can provide increased data rates and/or increased range performance.

摘要翻译： 用于在多频带正交频分复用（multi-band-OFDM）通信系统中提供多址的系统和方法。 优选实施例包括确定传输带宽以支持性能要求，并且基于传输带宽来配置多频带OFDM通信系统中的传输频带，其中传输频带可以由较小的传输频带组合在一起。 还包括初始化与配置的传输频带的通信。 使用粘合的传输带可以提供增加的数据速率和/或增加的范围性能。

公开(公告)号：US20120008718A1

公开(公告)日：2012-01-12

申请号：US13237543

申请日：2011-09-20

申请人： Anand G. Dabak ,  Eko N. Onggosanusi

发明人： Anand G. Dabak ,  Eko N. Onggosanusi

IPC分类号： H04L27/36 ,  H04L27/00

CPC分类号： H04B7/0456 ,  H04B7/0417 ,  H04B7/0619 ,  H04L5/023 ,  H04L25/0206 ,  H04L27/2608

摘要： Various wireless precoding systems and methods are presented. In some embodiments, a wireless transmitter comprises an antenna precoding block, a transform block, and multiple transmit antennas. The antenna precoding block receives frequency coefficients from multiple data streams and distributes the frequency coefficients across multiple transmit signals in accordance with frequency-dependent matrices. The transform block transforms the precoded frequency coefficients into multiple time domain transmit signals to be transmitted by the multiple antennas. The frequency coefficients from multiple data streams may be partitioned into tone groups, and all the frequency coefficients from a given tone group may be redistributed in accordance with a single matrix for that tone group. In some implementations, the frequency coefficients within a tone group for a given data stream may also be precoded. In some alternative embodiments, tone group precoding may be employed in a single channel system.

摘要翻译： 提出了各种无线预编码系统和方法。 在一些实施例中，无线发射机包括天线预编码块，变换块和多个发射天线。 天线预编码块从多个数据流接收频率系数，并根据频率依赖矩阵在多个发射信号之间分配频率系数。 变换块将预编码的频率系数转换成由多个天线发射的多个时域发射信号。 来自多个数据流的频率系数可以被划分为音调组，并且来自给定音调组的所有频率系数可以根据该音调组的单个矩阵重新分配。 在一些实现中，给定数据流的音调组内的频率系数也可以被预编码。 在一些替代实施例中，音调组预编码可以用于单个信道系统中。

公开(公告)号：US07961774B2

公开(公告)日：2011-06-14

申请号：US10687303

申请日：2003-10-14

申请人： Eko N. Onggosanusi ,  Anand G. Dabak

发明人： Eko N. Onggosanusi ,  Anand G. Dabak

IPC分类号： H04B1/69

CPC分类号： H04B7/0634 ,  H04B7/0654 ,  H04B7/0854 ,  H04L1/0023 ,  H04L25/0202 ,  H04L25/0328 ,  H04L25/03292

摘要： System and method for providing interference resistance in communications systems using closed-loop transmit diversity (CLTD). A preferred embodiment comprises: at a receiver, computing a CLTD weighting vector from a received signal, providing the CLTD weighting vector to a transmitter, and using the CLTD vector to suppress interference in the received signal, and at a transmitter, transmitting a signal, receiving the CLTD weighting vector from the receiver, and applying the CLTD weighting vector to all subsequent transmissions.

摘要翻译： 使用闭环发射分集（CLTD）的通信系统中提供抗干扰的系统和方法。 优选实施例包括：在接收机处，从接收信号计算CLTD加权向量，向发射机提供CLTD加权向量，并且使用CLTD向量来抑制接收信号中的干扰，并且在发射机处发射信号， 从接收机接收CLTD加权向量，并将CLTD加权向量应用于所有随后的传输。

公开(公告)号：US20090310782A1

公开(公告)日：2009-12-17

申请号：US12140789

申请日：2008-06-17

申请人： Anand G. Dabak ,  Eko N. Onggosanusi ,  Badri Varadarajan

发明人： Anand G. Dabak ,  Eko N. Onggosanusi ,  Badri Varadarajan

IPC分类号： H04L9/00

CPC分类号： H04W56/001 ,  H04B7/2681 ,  H04J11/0069 ,  H04J2011/0096 ,  H04L9/12 ,  H04L2209/80 ,  H04W36/0016 ,  H04W56/0015

摘要： Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter includes a synchronization unit configured to provide a primary synchronization signal and a secondary synchronization signal having first and second segments. The transmitter also includes a secondary scrambling unit configured to provide a scrambled secondary synchronization signal, wherein scrambling agents for the first and second segments are derived from a primary synchronization sequence of the primary synchronization signal. The secondary scrambling unit is further configured to provide an additional scrambling of one of the first and second segments, wherein a second scrambling agent is derived from the remaining segment of a secondary synchronization sequence of the secondary synchronization signal. The transmitter further includes a transmit unit configured to transmit the primary synchronization signal and the scrambled secondary synchronization signal.

摘要翻译： 本公开的实施例提供发射机，接收机和操作发射机和接收机的方法。 在一个实施例中，发射机包括配置成提供主同步信号和具有第一和第二段的辅同步信号的同步单元。 发射机还包括辅助加扰单元，其被配置为提供加扰的次同步信号，其中第一和第二段的加扰代码从主同步信号的主同步序列导出。 次加扰单元还被配置为提供第一和第二段中的一个的附加加扰，其中从副同步信号的辅同步序列的剩余段导出第二加扰代码。 发射机还包括被配置为发送主同步信号和加扰的次同步信号的发射单元。

公开(公告)号：US20090180416A1

公开(公告)日：2009-07-16

申请号：US12410025

申请日：2009-03-24

申请人： Timothy M. Schmidl ,  Eko N. Onggosanusi ,  Anand G. Dabak ,  Aris Papasakellariou

发明人： Timothy M. Schmidl ,  Eko N. Onggosanusi ,  Anand G. Dabak ,  Aris Papasakellariou

IPC分类号： G08C17/02

CPC分类号： H04L5/0044 ,  H04B1/1615 ,  H04B7/0413 ,  H04B7/2656 ,  H04L5/0007 ,  H04L5/0048 ,  H04W52/0229 ,  Y02D70/1244 ,  Y02D70/1262 ,  Y02D70/23 ,  Y02D70/26 ,  Y02D70/40 ,  Y02D70/444 ,  Y02D70/449

摘要： A method of power saving for a wireless transceiver (FIGS. 1 and 2) is disclosed. The transceiver has an active power mode (504) and a reduced power mode (510). The transceiver is operated in the reduced power mode (510) and monitors transmissions from a remote wireless transmitter while in the reduced power mode. The transceiver identifies a transmission from the remote wireless transmitter by a transceiver identity included in the transmission (FIG. 6. UE identification). The transceiver transitions to the active power mode (512) in response to identifying the transmission.

摘要翻译： 公开了一种用于无线收发机（图1和图2）的省电方法。 收发器具有有功功率模式（504）和降低功率模式（510）。 收发器以降低功率模式（510）运行，并且在降低功率模式下监视来自远程无线发射机的传输。 收发器通过包含在传输中的收发信机标识符来识别来自远程无线发射机的传输（图6的UE标识）。 响应于识别传输，收发器转换到有功功率模式（512）。

公开(公告)号：US07561618B2

公开(公告)日：2009-07-14

申请号：US11105755

申请日：2005-04-14

申请人： Antonio F. Mondragon-Torres ,  Steven P. Pekarich ,  Timothy M. Schmidl ,  Aris Papasakellariou ,  Anand G. Dabak ,  Eko N. Onggosanusi ,  Manish Goel

发明人： Antonio F. Mondragon-Torres ,  Steven P. Pekarich ,  Timothy M. Schmidl ,  Aris Papasakellariou ,  Anand G. Dabak ,  Eko N. Onggosanusi ,  Manish Goel

IPC分类号： H03H7/30

CPC分类号： H04L25/03019 ,  H04B1/7105 ,  H04B1/7117 ,  H04B7/0837 ,  H04L2025/03509 ,  H04L2025/03566 ,  H04L2025/03617

摘要： A system comprising a plurality of adaptive equalizers adapted to couple to a plurality of receive antennas, each of the antennas capable of receiving a multipath delay profile estimate (MDPE), control logic interconnecting at least some of the adaptive equalizers, and a control mechanism that, according to different MDPEs, configures at least some of the adaptive equalizers and control logic.

摘要翻译： 一种系统，包括适于耦合到多个接收天线的多个自适应均衡器，所述天线中的每一个能够接收多径延迟分布估计（MDPE），互连所述自适应均衡器中的至少一些的控制逻辑，以及控制机制， 根据不同的MDPE，配置至少一些自适应均衡器和控制逻辑。