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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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52.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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54.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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公开(公告)号：US08548375B2
公开(公告)日：2013-10-01
申请号：US12722694
申请日：2010-03-12
IPC分类号： H04B7/14
CPC分类号： H04B7/15585 , H04B7/15535
摘要： A wireless repeater includes a gain control metric computation block to compute a gain control metric for use in controlling the variable gain of the repeater. The gain control metric is computed by downsampling the gain control input signal to the gain control metric computation block and also downsampling the computed correlation and normalization terms. The gain control metric may be further enhanced by filtering the computed metric values using linear or non-linear filtering.
摘要翻译： 无线中继器包括增益控制度量计算块，用于计算用于控制中继器的可变增益的增益控制度量。 通过将增益控制输入信号下采样到增益控制度量计算块来计算增益控制度量，并且还对所计算的相关和归一化项进行下采样。 可以通过使用线性或非线性滤波来过滤所计算的度量值来进一步增强增益控制度量。
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公开(公告)号：US20130143483A1
公开(公告)日：2013-06-06
申请号：US13312642
申请日：2011-12-06
申请人： Dhananjay Ashok Gore , Gwendolyn Denise Barriac , Tao Tian , Michael Mao Wang , James Arthur Proctor, JR. , Kenneth M. Gainey
发明人： Dhananjay Ashok Gore , Gwendolyn Denise Barriac , Tao Tian , Michael Mao Wang , James Arthur Proctor, JR. , Kenneth M. Gainey
IPC分类号： H04B7/14
CPC分类号： H04B7/2606 , H04B7/15585
摘要： A wireless repeater in a multi-repeater environment operates to detect the presence of neighboring repeaters and to maintain repeater stability in the presence of a neighboring repeater. In some embodiments, the repeater transmits a known signal sequence to discover the presence of a neighboring repeater. When a neighboring repeater is detected, the repeater may apply mitigation measures to maintain operational stability at the repeater.
摘要翻译： 多中继器环境中的无线中继器操作以检测相邻中继器的存在并且在相邻中继器存在的情况下维持中继器的稳定性。 在一些实施例中，中继器发送已知信号序列以发现相邻中继器的存在。 当检测到相邻中继器时，中继器可以应用缓解措施来维持中继器的操作稳定性。
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58.发明授权公开(公告)号：US08446892B2
公开(公告)日：2013-05-21
申请号：US11129140
申请日：2005-05-13
CPC分类号： H04J11/005 , H04B1/7143
摘要： A channel structure has at least two channel sets. Each channel set contains multiple channels and is associated with a specific mapping of the channels to the system resources available for data transmission. Each channel set may be defined based on a channel tree having a hierarchical structure. To achieve intra-cell interference diversity, the channel-to-resource mapping for each channel set is pseudo-random with respect to the mapping for each remaining channel set. In each scheduling interval, terminals are scheduled for transmission on the forward and/or reverse link. The scheduled terminals are assigned channels from the channel sets. Multiple terminals may use the same system resources and their overlapping transmissions may be separated in the spatial domain. For example, beamforming may be performed to send multiple overlapping transmissions on the forward link, and receiver spatial processing may be performed to separate out multiple overlapping transmissions received on the reverse link.
摘要翻译： 通道结构具有至少两个通道组。 每个信道集合包含多个信道，并且将信道的特定映射与可用于数据传输的系统资源相关联。 可以基于具有分层结构的信道树来定义每个信道集合。 为了实现小区内干扰分集，每个信道集合的信道到资源映射相对于每个剩余信道集合的映射是伪随机的。 在每个调度间隔中，终端被调度为在前向链路和/或反向链路上传输。 调度终端从通道集分配通道。 多个终端可以使用相同的系统资源，并且它们的重叠传输可以在空间域中分离。 例如，可以执行波束成形以在前向链路上发送多个重叠传输，并且可以执行接收机空间处理以分离在反向链路上接收的多个重叠传输。
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公开(公告)号：US08432985B2
公开(公告)日：2013-04-30
申请号：US13402537
申请日：2012-02-22
IPC分类号： H04B26/00
CPC分类号： H04L25/0202 , H04L5/0023 , H04L5/0048
摘要： Techniques for transmitting pilot and for processing received pilot to obtain channel and interference estimates are described. A terminal may generate pilot symbols for a first cluster in a time frequency block based on a first sequence and may generate pilot symbols for a second cluster in the time frequency block based on a second sequence. The first and second sequences may include common elements arranged in different orders and may be considered as different versions of a single sequence. The terminal may transmit the pilot symbols in their respective clusters. A base station may obtain received pilot symbols from multiple clusters in the time frequency block. The base station may form each of multiple basis vectors with multiple versions of the sequence assigned to the terminal and may process the received pilot symbols with the multiple basis vectors to obtain a channel estimate for the terminal.
摘要翻译： 描述用于发送导频和处理接收导频以获得信道和干扰估计的技术。 终端可以基于第一序列在时间频率块中生成用于第一簇的导频符号，并且可以基于第二序列在时间频率块中生成用于第二簇的导频符号。 第一和第二序列可以包括以不同顺序排列的公共元素，并且可以被认为是单个序列的不同版本。 终端可以在它们各自的簇中发送导频符号。 基站可以在时间频率块中从多个簇获得接收到的导频符号。 基站可以形成分配给终端的序列的多个版本的多个基本向量中的每一个，并且可以用多个基本向量处理所接收的导频符号以获得终端的信道估计。
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公开(公告)号：US08411732B2
公开(公告)日：2013-04-02
申请号：US12041616
申请日：2008-03-03
CPC分类号： H04B7/0413 , H04L2025/03414 , H04L2025/03426 , H04L2025/03605
摘要： Systems and methodologies are described that facilitate equalization of received signals in a wireless communication environment. Using multiple transmit and/or receive antennas and MIMO technology, multiple data streams can be transmitted within a single tone. During equalization, receivers can separate data received within a tone into individual data streams. The equalization process generally is computationally expensive. Equalizer functions include the inverse operation, which can be computed using the fast square root method; however, the fast square root method involves large numbers of computations for a set of matrices, where the size of a matrix in the set of matrices increases with the number of transmit or receive antennas. Utilizing a modification of the fast square root method, a subset of the elements of the matrices can be selected and updated to reduce the number and/or complexity of computations.
摘要翻译： 描述了促进无线通信环境中的接收信号的均衡的系统和方法。 使用多个发射和/或接收天线和MIMO技术，可以在单个音调内传输多个数据流。 在均衡期间，接收机可以将音调内接收到的数据分离为单独的数据流。 均衡过程通常在计算上是昂贵的。 均衡器功能包括逆运算，可以使用快速平方根法计算; 然而，快速平方根方法涉及对于一组矩阵的大量计算，其中矩阵集合中的矩阵的大小随着发射或接收天线的数量而增加。 利用快速平方根方法的修改，可以选择和更新矩阵元素的子集，以减少计算的数量和/或复杂度。
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