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61.发明申请公开(公告)号：US20080192868A1
公开(公告)日：2008-08-14
申请号：US11675055
申请日：2007-02-14
IPC分类号： H04L27/06
CPC分类号： H04W52/34
摘要： A method of user power offset estimation for a wireless communication system is disclosed. Dedicated pilot symbols transmitted over at least one time-frequency region for a user are received. Power offset of the user is estimated based on the received dedicated pilot symbols.
摘要翻译： 公开了一种用于无线通信系统的用户功率偏移估计的方法。 接收通过用户的至少一个时间 - 频率区域发送的专用导频符号。 基于所接收的专用导频符号来估计用户的功率偏移。
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62.发明授权公开(公告)号：US09520972B2
公开(公告)日：2016-12-13
申请号：US11083708
申请日：2005-03-17
CPC分类号： H04L5/0048 , H04L5/0023
摘要： Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The pattern allows for improved receipt of the pilot symbols transmitted. In addition, schemes for improving the ability to multiplex pilot symbols without interference and/or biasing from different mobile stations over the same frequencies and in the same time slots.
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公开(公告)号：US08886115B2
公开(公告)日：2014-11-11
申请号：US12722760
申请日：2010-03-12
CPC分类号： H04B7/15578
摘要： A method for controlling gain in a wireless repeater includes computing a gain control metric indicative of a loop gain of the repeater and detecting changes in a signal power of a gain control input signal where the gain control input signal is taken from any point in the feedback loop of the repeater. When a large power swing in the gain control input signal is detected, the method operates to discard at least a portion of each gain control metric measurement for a first duration before continuing with computing the gain control metric. In another embodiment, the method may include discarding samples of the gain control input signal used in computing the gain control metric for a first duration when a large power swing in the gain control input signal is detected.
摘要翻译： 一种用于控制无线中继器中的增益的方法包括：计算表示中继器的环路增益的增益控制度量，并且检测增益控制输入信号的信号功率的变化，其中增益控制输入信号是从反馈中的任何点 中继器的回路。 当检测到增益控制输入信号中的大功率摆幅时，该方法在继续计算增益控制度量之前，在第一持续时间内丢弃每个增益控制度量测量的至少一部分。 在另一实施例中，当检测到增益控制输入信号中的大功率摆幅时，该方法可以包括丢弃用于计算增益控制度量的增益控制输入信号的采样，该第一持续时间。
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公开(公告)号：US08792922B2
公开(公告)日：2014-07-29
申请号：US11680233
申请日：2007-02-28
IPC分类号： H04B15/00
CPC分类号： H04W72/1231 , H04W72/1268
摘要： Systems and methodologies are described that facilitate mitigation of interference through uplink scheduling in a wireless communication environment. Access points can assign multiple terminals to a single tile or segment of shared resource (e.g., a time frequency region) to maximize the number of terminals supported. However, combinations of certain types of terminals can cause a significant increase in interference. In particular, allocating multiple terminals having a relatively high velocity (e.g., terminals located in moving vehicles) to a single tile can cause an unacceptable increase in interference. To mitigate interference, high velocity terminals can be identified. Once identified, terminals can be allocated to the available tiles based at least in part upon avoiding combinations that result in a significant increase in interference.
摘要翻译： 描述了通过无线通信环境中的上行链路调度促进减轻干扰的系统和方法。 接入点可以将多个终端分配给单个瓦片或共享资源段（例如，时间频率区域），以最大化所支持的终端的数量。 然而，某些类型的终端的组合可能导致干扰的显着增加。 特别地，将具有较高速度的多个终端（例如，位于移动车辆中的终端）分配到单个瓦片可能导致不可接受的干扰增加。 为了减轻干扰，可以确定高速终端。 一旦被识别，终端可以至少部分地基于避免导致干扰显着增加的组合而被分配给可用的瓦片。
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65.发明授权公开(公告)号：US08737911B2
公开(公告)日：2014-05-27
申请号：US12609698
申请日：2009-10-30
IPC分类号： H04B3/36
CPC分类号： H04B7/15535 , H04B7/15585 , H04L27/2607 , H04L27/2613
摘要： In one embodiment, a method for providing echo cancellation in a wireless repeater includes: adding the pilot signal to a transmit signal; receiving a receive signal being the sum of a remote signal, a feedback pilot signal and a feedback transmit signal; cancelling the feedback transmit signal from the receive signal using a currently available feedback channel estimate and generating a first echo cancelled signal; generating an updated feedback channel estimate using the first echo cancelled signal and the pilot signal as a reference signal; cancelling the feedback transmit signal and the feedback pilot signal from the receive signal using the updated feedback channel estimate and generating a second echo cancelled signal; and amplifying the second echo cancelled signal as the transmit signal. In another embodiment, the feedback pilot signal is cancelled from the first echo cancelled signal using the updated feedback channel estimate to generate the second echo cancelled signal.
摘要翻译： 在一个实施例中，一种用于在无线中继器中提供回波消除的方法包括：将导频信号添加到发射信号; 接收作为远程信号，反馈导频信号和反馈发送信号之和的接收信号; 使用当前可用的反馈信道估计从所述接收信号中消除所述反馈发射信号并产生第一回波消除信号; 使用所述第一回波消除信号和所述导频信号作为参考信号产生更新的反馈信道估计; 使用更新的反馈信道估计从接收信号中消除反馈发射信号和反馈导频信号，并产生第二回波消除信号; 并且将第二回波消除信号放大为发送信号。 在另一个实施例中，使用更新的反馈信道估计从第一回波消除信号中消除反馈导频信号以产生第二回波消除信号。
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公开(公告)号：US08638835B2
公开(公告)日：2014-01-28
申请号：US13312533
申请日：2011-12-06
IPC分类号： H04L25/20
CPC分类号： H04B7/15578
摘要： A wireless repeater incorporates a gain management block to implement a multi-parameter gain management algorithm. The gain management algorithm receives gain settings from at least a gain control metric for stability and output signal quality and signal headroom values associated with circuitry of the repeater. The gain management block provides secure and robust boot-up of the repeater as well as oscillation detection and prevention. Furthermore, the gain management block implements repeater stability control, output signal-to-noise level control, uplink and downlink gain balance control and compensation for device constraints.
摘要翻译： 无线中继器包含增益管理块以实现多参数增益管理算法。 增益管理算法从至少一个增益控制度量接收增益设置，用于稳定性和输出信号质量以及与中继器的电路相关联的信号余量值。 增益管理块提供中继器的安全可靠的启动以及振荡检测和防止。 此外，增益管理块实现中继器稳定性控制，输出信噪比电平控制，上行链路和下行链路增益平衡控制以及器件约束的补偿。
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67.发明授权公开(公告)号：US08630211B2
公开(公告)日：2014-01-14
申请号：US12827669
申请日：2010-06-30
CPC分类号： H04B1/525 , H04B7/15585
摘要： A wireless repeater includes a receiver circuit implemented as an intermediate frequency (IF) subsampling receiver and a transmitter circuit implemented as a direct conversion (zero-IF) transmitter. The repeater further includes a reference receiver implemented as an IF subsampling receiver to sample a portion of the transmit signal prior to over-the-air transmission for use as the reference signal for channel estimation. Highly accurate channel estimation is obtained by using the reference signal from the reference receiver as the reference signal accounts for distortions in the transmitter circuit of the repeater. The repeater may include an echo canceller to cancel an estimated feedback amount from an input signal based on the channel estimation.
摘要翻译： 无线中继器包括被实现为中频（IF）子采样接收机的接收机电路和被实现为直接转换（零中频））发射机的发射机电路。 中继器还包括实现为IF子采样接收机的参考接收机，用于在空中传输之前对发射信号的一部分进行采样，以用作信道估计的参考信号。 通过使用来自参考接收机的参考信号来获得高精度的信道估计，因为参考信号考虑了中继器的发射机电路中的失真。 中继器可以包括回声消除器，以基于信道估计从输入信号中消除估计的反馈量。
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公开(公告)号：US08626060B2
公开(公告)日：2014-01-07
申请号：US13086540
申请日：2011-04-14
IPC分类号： H04B7/15
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。
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69.发明授权Channel estimate pruning in presence of large signal dynamics in an interference cancellation repeater 有权在干扰消除中继器中存在大的信号动态的信道估计修剪公开(公告)号：US08611227B2
公开(公告)日：2013-12-17
申请号：US12776867
申请日：2010-05-10
CPC分类号： H04L25/022 , H04B7/15585 , H04L25/0226
摘要： A method for estimating a feedback channel for a wireless repeater detects changes in a power of a remote signal. When a large power swing in the remote signal is detected, the method operates to discard samples or blocks of samples of the pilot and receive signals and a final channel estimate is generated using undiscarded samples of the pilot and receive signals. Alternately, sub channel estimates are generated using individual blocks of the pilot samples and receive samples. When a large power swing in the remote signal is detected, the method operates to discard one or more sub channel estimates and a final channel estimate is generated using undiscarded sub channel estimates.
摘要翻译： 用于估计无线中继器的反馈信道的方法检测远程信号的功率的变化。 当检测到远程信号中的大功率摆动时，该方法操作以丢弃导频和接收信号的样本或块样本，并且使用导频和接收信号的未被滤除的样本来生成最终信道估计。 或者，使用导频样本的各个块并接收采样来生成子信道估计。 当检测到远程信号中的大功率摆动时，该方法操作以丢弃一个或多个子信道估计，并且使用未被清除的子信道估计来生成最终信道估计。
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公开(公告)号：US08582548B2
公开(公告)日：2013-11-12
申请号：US11325980
申请日：2006-01-04
申请人： Dhananjay Ashok Gore , Ravi Palanki
发明人： Dhananjay Ashok Gore , Ravi Palanki
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。
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