公开(公告)号：US08107517B2

公开(公告)日：2012-01-31

申请号：US11560735

申请日：2006-11-16

申请人： Ayman Fawzy Naguib ,  Dhananjay Ashok Gore ,  Alexei Gorokhov ,  Tamer Kadous

发明人： Ayman Fawzy Naguib ,  Dhananjay Ashok Gore ,  Alexei Gorokhov ,  Tamer Kadous

IPC分类号： H04B17/00

CPC分类号： H04L27/2647 ,  H04L1/0631 ,  H04L25/022

摘要： Techniques to facilitate estimating the frequency response of a wireless channel in an OFDM system are provided. The method and systems allow for combining signal information across multiple communication channels at one or more channel tap delays in order to determine appropriate taps for channel information.

摘要翻译： 提供了有助于估计OFDM系统中的无线信道的频率响应的技术。 该方法和系统允许在一个或多个信道抽头延迟的情况下在多个通信信道上组合信号信息，以便确定用于信道信息的合适的抽头。

公开(公告)号：US08139672B2

公开(公告)日：2012-03-20

申请号：US11390622

申请日：2006-03-27

申请人： Dhananjay Ashok Gore ,  Tingfang Ji ,  Tamer Kadous

发明人： Dhananjay Ashok Gore ,  Tingfang Ji ,  Tamer Kadous

IPC分类号： H04L27/00

CPC分类号： H04L27/2613 ,  H04B7/0413 ,  H04L25/0226

摘要： Systems and methodologies are described that facilitate improved pilot information to MIMO user devices without increasing interference of SISO user devices in a wireless communication environment. A data communication signal can be generated and transmitted at a first power level, and a continuous pilot waveform comprising pilot information related to the data signal can be generated and sent at a second power level below the first transmission power level. Alternatively, a discontinuous pilot waveform can be generated so that it does not overlap with pilot segments in the first waveform, and can be transmitted at the first power level without interfering with the first waveform as received by a SISO user device. A MIMO user device can receive both waveforms, and can employ the pilot waveform to better estimate a MIMO channel for the first waveform.

摘要翻译： 描述了在不增加SISO用户设备在无线通信环境中的干扰的情况下促进对MIMO用户设备的改进的导频信息的系统和方法。 可以以第一功率电平生成并发送数据通信信号，并且可以以低于第一发送功率电平的第二功率电平生成包括与数据信号相关的导频信息的连续导频波形。 或者，可以生成不连续的导频波形，使得其不与第一波形中的导频段重叠，并且可以在不干扰由SISO用户设备接收的第一波形的情况下以第一功率电平发送。 MIMO用户设备可以接收两个波形，并且可以使用导频波形来更好地估计用于第一波形的MIMO信道。

公开(公告)号：US09049065B2

公开(公告)日：2015-06-02

申请号：US12776998

申请日：2010-05-10

申请人： Gwendolyn Denise Barriac ,  Steven J. Howard ,  Dhananjay Ashok Gore

发明人： Gwendolyn Denise Barriac ,  Steven J. Howard ,  Dhananjay Ashok Gore

IPC分类号： H04W24/00 ,  H04L25/02 ,  H04B7/155

CPC分类号： H04L25/0226 ,  H04B7/15585 ,  H04L25/022 ,  H04L25/0242

摘要： A method for estimating a feedback channel for a wireless repeater using frequency domain channel estimation estimates an error correction term using a most recent channel estimate and cancels the error correction term from a current block of the receive signal. Then, the feedback channel is estimated using frequency domain channel estimation and using a current block of the pilot signal and the corrected block of the receive signal. A channel estimate error term may also be estimated and subtracted directly from the channel estimate.

摘要翻译： 使用频域信道估计来估计无线中继器的反馈信道的方法使用最近的信道估计估计误差校正项，并从接收信号的当前块中消除纠错项。 然后，使用频域信道估计并使用导频信号的当前块和接收信号的校正块来估计反馈信道。 也可以从信道估计直接估计和减去信道估计误差项。

公开(公告)号：US08942272B2

公开(公告)日：2015-01-27

申请号：US13194731

申请日：2011-07-29

申请人： Ravi Palanki ,  Dexu Lin ,  Kapil Bhattad ,  Dhananjay Ashok Gore

发明人： Ravi Palanki ,  Dexu Lin ,  Kapil Bhattad ,  Dhananjay Ashok Gore

IPC分类号： H04B3/36 ,  H04B7/17 ,  H04B17/02 ,  H04L25/20 ,  H04L25/52 ,  H04B7/155 ,  H04B7/06 ,  H04B7/08 ,  H04B7/10

CPC分类号： H04B7/15571 ,  H04B7/0671 ,  H04B7/084 ,  H04B7/0857 ,  H04B7/0894 ,  H04B7/10 ,  H04B7/155

摘要： Systems and methodologies are described that enable serving cell selection in a wireless network with a multiple antenna repeater operable to support MIMO communications. In one example, a repeater using orthogonal frequency division multiplexing on the downlink can be equipped to receive, by one or more receive antennas, one or more signals using one or more radio frequency (RF) isolation schemes. The repeater can further be equipped to amplify and delay the one or more signals using one or more combination schemes. Moreover, the repeater can be equipped to transmit, by one or more transmit antennas, the amplified and delayed one or more signals, wherein at least one of the one or more receive antennas or the one or more transmit antennas includes two or more antennas.

摘要翻译： 描述了能够利用可操作以支持MIMO通信的多天线中继器在无线网络中服务小区选择的系统和方法。 在一个示例中，在下行链路上使用正交频分复用的中继器可以被配置成通过一个或多个接收天线使用一个或多个射频（RF）隔离方案来接收一个或多个信号。 中继器还可以被配置成使用一个或多个组合方案来放大和延迟一个或多个信号。 此外，中继器可以被配置成通过一个或多个发射天线发射放大和延迟的一个或多个信号，其中一个或多个接收天线或一个或多个发射天线中的至少一个包括两个或更多个天线。

公开(公告)号：US08681764B2

公开(公告)日：2014-03-25

申请号：US12952019

申请日：2010-11-22

申请人： Dhananjay Ashok Gore ,  Ravi Palanki

发明人： Dhananjay Ashok Gore ,  Ravi Palanki

IPC分类号： H04B7/208 ,  H04J11/00 ,  H04J3/00

CPC分类号： H04B7/2621 ,  H04B1/00 ,  H04B1/0003 ,  H04L5/0007 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2614

摘要： Techniques for transmitting data using single-carrier frequency division multiple access (SC-FDMA) multiplexing schemes are described. In one aspect, data is sent on sets of adjacent subbands that are offset from one another to achieve frequency diversity. A terminal may be assigned a set of N adjacent subbands that is offset by less than N (e.g., N/2) subbands from another set of N adjacent subbands assigned to another terminal and would then observe interference on only subbands that overlap. In another aspect, a multi-carrier transmission symbol is generated with multi-carrier SC-FDMA. Multiple waveforms carrying modulation symbols in the time domain on multiple sets of subbands are generated. The multiple waveforms are pre-processed (e.g., cyclically delayed by different amounts) to obtain pre-processed waveforms, which are combined (e.g., added) to obtain a composite waveform. A cyclic prefix is appended to the composite waveform to generate the multi-carrier transmission symbol.

摘要翻译： 描述了使用单载波频分多址（SC-FDMA）复用方案发送数据的技术。 在一个方面，在彼此偏移的相邻子带的集合上发送数据以实现频率分集。 可以向终端分配一组N个相邻子带，该组N个相邻子带从N个相邻子带的N个（例如，N / 2个）子带偏移，分配给另一个终端，然后将仅对重叠的子带观察到干扰。 在另一方面，使用多载波SC-FDMA生成多载波传输符号。 产生在多个子带组上的时域中承载调制符号的多个波形。 多个波形被预处理（例如，循环地延迟不同的量）以获得预处理的波形，其被组合（例如，添加）以获得复合波形。 循环前缀附加到复合波形以产生多载波传输符号。

公开(公告)号：US08463176B2

公开(公告)日：2013-06-11

申请号：US12722730

申请日：2010-03-12

申请人： Michael Mao Wang ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac

发明人： Michael Mao Wang ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac

IPC分类号： H04B17/02

CPC分类号： H04B7/15578

摘要： A method for monitoring feedback loop stability in a wireless repeater includes measuring a gain control metric in the feedback loop of the repeater periodically for a given time period where the gain control metric is indicative of a loop gain of the feedback loop of the repeater; and monitoring the magnitude of the gain control metric to determine the stability of the feedback loop of the repeater. In operation, a large magnitude of the gain control metric indicates instability in the feedback loop of the repeater.

摘要翻译： 一种用于监测无线中继器中的反馈环路稳定性的方法包括在给定的时间周期周期性地测量中继器的反馈环路中的增益控制度量，其中增益控制度量指示中继器的反馈环路的环路增益; 并监视增益控制度量的大小以确定中继器的反馈回路的稳定性。 在操作中，大幅度的增益控制度量指示中继器的反馈回路中的不稳定性。

公开(公告)号：US20130077502A1

公开(公告)日：2013-03-28

申请号：US13243899

申请日：2011-09-23

申请人： Kenneth M. Gainey ,  Dhananjay Ashok Gore ,  James Arthur Proctor, JR.

发明人： Kenneth M. Gainey ,  Dhananjay Ashok Gore ,  James Arthur Proctor, JR.

IPC分类号： H04W24/00 ,  H04W52/04 ,  H04L12/26

CPC分类号： H04B7/15578

摘要： A method of controlling gains within a repeater may include determining a power control set point value which controls a transmit power of a mobile station (MS), and receiving a downlink signal from a base station transceiver system (BTS). The method may further include measuring a power of the received downlink signal, and computing a power level of a signal expected at the uplink of the repeater, wherein the computing is based on the measured downlink power and the power control set point value. Finally, the method may further include adjusting a gain of at least one amplifier based on the computed power level. An apparatus for controlling gains in a repeater may include a baseband processor for performing the above method.

摘要翻译： 控制中继器内的增益的方法可以包括确定控制移动台（MS）的发射功率的功率控制设定点值，以及从基站收发信机（BTS）接收下行链路信号。 该方法还可以包括测量所接收的下行链路信号的功率，以及计算在中继器的上行链路上预期的信号的功率电平，其中所述计算基于所测量的下行链路功率和功率控制设定点值。 最后，该方法还可以包括基于所计算的功率电平来调整至少一个放大器的增益。 用于控制中继器中的增益的装置可以包括用于执行上述方法的基带处理器。

公开(公告)号：US08380122B2

公开(公告)日：2013-02-19

申请号：US12708318

申请日：2010-02-18

申请人： Steven J. Howard ,  Tadeusz Jarosinski ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Michael Mao Wang ,  Tao Tian

发明人： Steven J. Howard ,  Tadeusz Jarosinski ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Michael Mao Wang ,  Tao Tian

IPC分类号： H04B3/36 ,  H04B7/14

CPC分类号： H04B7/15535 ,  H04B7/15585 ,  H04L27/2607 ,  H04L27/2613

摘要： A wireless repeater includes a channel estimation block to estimate a feedback channel between the antennas of the repeater using frequency domain channel estimation. The repeater includes a pilot signal blanking circuit to blank out a selected number of samples of the pilot signal to improve the accuracy of the channel estimation. In another embodiment, the repeater replaces T samples of the pilot signal with a cyclic prefix.

摘要翻译： 无线中继器包括信道估计块，用于使用频域信道估计来估计中继器的天线之间的反馈信道。 中继器包括导频信号消隐电路，用于消除导频信号的选定数目的样本，以提高信道估计的精度。 在另一个实施例中，中继器用循环前缀替换导频信号的T个样本。

公开(公告)号：US20130034128A1

公开(公告)日：2013-02-07

申请号：US13204397

申请日：2011-08-05

申请人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Michael Mao Wang ,  Tao Tian

发明人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Michael Mao Wang ,  Tao Tian

IPC分类号： H04L25/20

CPC分类号： H04B7/15585 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/446

摘要： A wireless repeater introduces a low level noise to the signal path of the repeater where the introduced noise is used to facilitate channel estimation. The introduced low power level noise may be added to the receive signal or to the transmit signal. The low power noise signal ensures that the repeater always has a reference signal for performing channel estimation, even when the repeater is not receiving any incoming signal traffic. In one embodiment, a low noise signal is inserted to the transmit circuit of the repeater. In another embodiment, the repeater is configured to increase the noise figure of the receive circuit where the detected noise figure acts as a receive signal.

摘要翻译： 无线中继器向中继器的信号路径引入低电平噪声，其中引入的噪声用于促进信道估计。 引入的低功率电平噪声可以被添加到接收信号或发送信号。 低功率噪声信号确保中继器总是具有用于执行信道估计的参考信号，即使中继器没有接收任何输入信号业务。 在一个实施例中，低噪声信号被插入到中继器的发射电路。 在另一个实施例中，中继器被配置为增加接收电路的噪声系数，其中检测到的噪声系数作为接收信号。

公开(公告)号：US20120264369A1

公开(公告)日：2012-10-18

申请号：US13086540

申请日：2011-04-14

申请人： Michael Mao Wang ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac

发明人： Michael Mao Wang ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac

IPC分类号： H04W88/00 ,  H04B7/00

CPC分类号： H04B7/15528 ,  H04L5/0007 ,  H04W48/10 ,  H04W84/047

摘要： In an embodiment, a first repeater configures a beacon signal that identifies the first repeater to one or more other repeaters. The first repeater transmits the configured beacon signal at a given transmission power level to the one or more other repeaters. The transmitted beacon signal is received at least by a second repeater. The second repeater reduces interference associated with other transmissions from the first repeater, such as retransmissions of donor signals, based on the received beacon signal.

摘要翻译： 在一个实施例中，第一中继器将识别第一中继器的信标信号配置到一个或多个其他中继器。 第一中继器以给定的发射功率电平将配置的信标信号发射到一个或多个其它中继器。 所发送的信标信号至少由第二中继器接收。 第二中继器基于接收到的信标信号来减少与来自第一中继器的其他传输相关联的干扰，例如施主信号的重传。