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公开(公告)号：US08718542B2
公开(公告)日：2014-05-06
申请号：US12888295
申请日：2010-09-22
CPC分类号： H04W16/26 , H04B7/2606 , H04W16/32 , Y02D70/1242 , Y02D70/1262 , Y02D70/449
摘要： A wireless communication system and method comprising co-location of a pico evolved node B (“eNB”) and a macro up-link repeater is disclosed. User Equipment (“UE”) communicates with a macro eNB via the up-link repeater with reduced transmission power as compared to the transmission power required for the UE to communicate directly with the macro eNB. As a result, the UE does not desensitize the pico eNB receiver. The up-link repeater comprises a donor antenna that radiates a highly directional beam to the macro eNB.
摘要翻译： 公开了一种包括微进化节点B（“eNB”）和宏上行链路中继器的共同定位的无线通信系统和方法。 与UE直接与宏eNB通信所需的传输功率相比，用户设备（“UE”）通过上行链路中继器与发送功率降低的宏eNB进行通信。 结果，UE不会使微微eNB接收机脱敏。 上行链路中继器包括向宏eNB辐射高度定向波束的施主天线。
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2.发明授权Crest factor reduction system and method for OFDM transmission systems using selective sub-carrier degradation 有权使用选择性子载波降级的OFDM传输系统的波峰因子减小系统和方法公开(公告)号：US07742535B2
公开(公告)日：2010-06-22
申请号：US11642281
申请日：2006-12-19
CPC分类号： H04L27/2614
摘要： A system and method for crest factor reduction of OFDM transmission systems using selective sub-carrier degradation, is disclosed. A modulated communications signal comprising a series of symbols is converted into parallel format in groups of plural symbols in the frequency domain. Crest factor reduction reduces a primary peak of the groups of plural symbols by selective sub-carrier degradation, to generate peak reduction symbols. The groups of plural symbols are converted into time domain symbols, and combined with the peak reduction symbols to provide peak reduced symbols in time domain.
摘要翻译： 公开了一种使用选择性子载波降级的OFDM传输系统的波峰因数降低的系统和方法。 包括一系列符号的调制通信信号在频域中以多个符号的组被转换成并行格式。 波峰因数降低通过选择性子载波降解来减少多个符号的组的主峰，以产生峰值降低符号。 多个符号的组被转换成时域符号，并与峰值缩减符号组合以在时域中提供峰值缩减符号。
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3.发明授权System and method for control of loop alignment in adaptive feed forward amplifiers 有权用于控制自适应前馈放大器中环路对准的系统和方法公开(公告)号：US07157967B2
公开(公告)日：2007-01-02
申请号：US11018216
申请日：2004-12-21
IPC分类号： H03F1/00
CPC分类号： H03F1/3235
摘要： A fast search algorithm for loop alignment of a feed forward amplifier is disclosed. The algorithm controls a processor that adjusts, digitally, the gain and phase of the loop alignment based on power measurements at the input and output of cancellation combiners, to find the optimal setting. A “non-collinear descent” algorithm is used to search, iteratively, for the minimum within an error surface. For loop alignment, the error surface is defined by the set of measurement points comprising the alignment settings and the associated cancellation residuals. For the case of first loop alignment, the cancellation residual is measured using the ratio of two power detectors located at the input and after the cancellation (error) combiner. For second loop alignment, cancellation is estimated using the residual pilot power detected at the output of the amplifier. The preferred alignment method uses three successive measurements to estimate the gradient direction with respect to gain and phase shifter settings. The actual descent direction is selected to be close to the gradient direction without being collinear with the most recent alignment adjustments. Quantization of the descent direction simplifies the implementation as well as the enforcement of the non-collinearity constraint on successive alignment settings. Two different step size selection approaches are disclosed, however, any standard step size selection approach may be employed.
摘要翻译： 公开了一种用于前馈放大器的循环对准的快速搜索算法。 该算法控制一个处理器，可以根据消除组合器的输入和输出功率测量数字地调整环路对准的增益和相位，以找到最佳设置。 使用“非共线下降”算法迭代地搜索误差表面内的最小值。 对于循环对准，误差表面由包括对准设置和相关联的取消残差的测量点集合定义。 对于第一循环对准的情况，使用位于输入端和取消（错误）组合器之后的两个功率检测器的比率来测量抵消残差。 对于第二环路对准，使用在放大器的输出处检测到的残留导频功率来估计抵消。 优选的对准方法使用三个连续的测量来估计关于增益和移相器设置的梯度方向。 选择实际下降方向接近梯度方向，而不与最近的对准调整共线。 下降方向的量化简化了实现以及对连续对齐设置的非共线性约束的执行。 公开了两种不同的步长选择方法，然而，可以采用任何标准步长选择方法。
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4.发明授权Data throughput for cell-edge users in a LTE network using down-link repeaters and up link HARQ relays 有权使用下行链路中继器和上行链路HARQ中继的LTE网络中的小区边缘用户的数据吞吐量公开(公告)号：US08918692B2
公开(公告)日：2014-12-23
申请号：US13324599
申请日：2011-12-13
CPC分类号： H04W40/22 , H04B7/155 , H04L1/1816 , H04L1/1822 , H04L1/1887 , H04L1/1893 , H04L2001/0097 , H04W72/0406 , H04W72/0413 , H04W72/042 , H04W84/047
摘要： A combination of repeaters and relays is used to improve the data throughput for user equipment (“UE”) near the cell edge in a LTE network. Amplify-and-forward repeaters and decode-and-forward relays enhance the down-link and up-link, respectively. Relay assistance on the up-link occurs when the evolved Node B (“eNB”) requests a retransmission (HARQ) from the UE at which point the UE and relay transmit simultaneously in a cooperative fashion. The quality of the up-link signal received by the eNB is improved due to a favorable channel through the relay. An analysis shows that relay assistance improves the throughput for a cell-edge user when the average delay per data transport block is allowed to increase.
摘要翻译： 使用中继器和中继器的组合来改善LTE网络中小区边缘附近的用户设备（“UE”）的数据吞吐量。 放大和转发中继器和解码和转发继电器分别增强了下行链路和上行链路。 上行链路上的中继协助发生在演进节点B（“eNB”）从UE请求重传（HARQ）时，UE和中继器以协作方式同时发送。 由于通过继电器的良好信道，eNB接收到的上行链路信号的质量得到改善。 分析表明，当允许每个数据传输块的平均延迟增加时，中继协助改善了小区边缘用户的吞吐量。
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5.发明授权Stability recovery for an on-frequency RF repeater with adaptive echo cancellation 有权具有自适应回波消除的频率RF中继器的稳定性恢复公开(公告)号：US08150309B2
公开(公告)日：2012-04-03
申请号：US11940098
申请日：2007-11-14
IPC分类号： H04H40/00
CPC分类号： H04B1/525 , H04B7/15564
摘要： A wireless repeater includes an internal feedback path for adaptively cancelling an echo between an output antenna and an input antenna. The internal feedback path employs an adaptive algorithm implementing a list having a plurality of list elements. Each list element has one or more echo cancellation parameters and one or more repeater settings. The list may be pruned by employing a minimum distance between elements within the list. A method for stabilizing a wireless repeater includes obtaining an autocorrelation of a signal in a signal path of the repeater, detecting an echo in the signal path based on the autocorrelation, providing a list of elements indicating past successful echo cancellation coefficients and associated repeater settings, and adaptively adjusting an error of the echo cancellation coefficients to cancel the echo in the signal path.
摘要翻译： 无线中继器包括用于自适应地消除输出天线和输入天线之间的回波的内部反馈路径。 内部反馈路径采用实现具有多个列表元素的列表的自适应算法。 每个列表元素具有一个或多个回声消除参数和一个或多个中继器设置。 可以通过使用列表中的元素之间的最小距离来修剪列表。 一种用于稳定无线中继器的方法包括获得中继器的信号路径中的信号的自相关，基于自相关检测信号路径中的回波，提供指示过去成功的回波消除系数和相关联的中继器设置的元素的列表， 并自适应地调整回波消除系数的误差以消除信号路径中的回波。
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6.发明授权System and method for estimation and compensation of radiated feedback coupling in a high gain repeater 失效用于高增益中继器辐射反馈耦合的估计和补偿的系统和方法公开(公告)号：US07715785B2
公开(公告)日：2010-05-11
申请号：US11788181
申请日：2007-04-19
CPC分类号： H04B7/15578
摘要： A system and method of compensating for the effects of the antenna coupling in on-frequency repeaters, whose input and output signals are the same frequency, are disclosed. The repeater is implemented with internal digitally determined compensation that reduces the effect of the antenna coupling, allowing the forward gain of the repeater to be increased. The real and imaginary components of the forward gain are dithered. The change in the power spectrum of the signal in response to the dithering is used to estimate the residual (uncompensated) feedback coupling.
摘要翻译： 公开了一种补偿输入和输出信号是相同频率的频率转发器中天线耦合效应的系统和方法。 中继器采用内部数字确定的补偿来实现，可以减少天线耦合的影响，从而增加中继器的正向增益。 正向增益的实部和虚部分量是抖动的。 响应于抖动的信号的功率谱的变化用于估计残差（无补偿）反馈耦合。
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7.发明申请STABILITY RECOVERY FOR AN ON-FREQUENCY RF REPEATER WITH ADAPTIVE ECHO CANCELLATION 有权具有自适应ECHO取消功能的频率射频复接器的稳定性恢复公开(公告)号：US20080113617A1
公开(公告)日：2008-05-15
申请号：US11940098
申请日：2007-11-14
IPC分类号： H04B3/36
CPC分类号： H04B1/525 , H04B7/15564
摘要： A wireless repeater includes an internal feedback path for adaptively cancelling an echo between an output antenna and an input antenna. The internal feedback path employs an adaptive algorithm implementing a list having a plurality of list elements. Each list element has one or more echo cancellation parameters and one or more repeater settings. The list may be pruned by employing a minimum distance between elements within the list. A method for stabilizing a wireless repeater includes obtaining an autocorrelation of a signal in a signal path of the repeater, detecting an echo in the signal path based on the autocorrelation, providing a list of elements indicating past successful echo cancellation coefficients and associated repeater settings, and adaptively adjusting an error of the echo cancellation coefficients to cancel the echo in the signal path.
摘要翻译： 无线中继器包括用于自适应地消除输出天线和输入天线之间的回波的内部反馈路径。 内部反馈路径采用实现具有多个列表元素的列表的自适应算法。 每个列表元素具有一个或多个回声消除参数和一个或多个中继器设置。 可以通过使用列表中的元素之间的最小距离来修剪列表。 一种用于稳定无线中继器的方法包括获得中继器的信号路径中的信号的自相关，基于自相关检测信号路径中的回波，提供指示过去成功的回波消除系数和相关中继器设置的元素的列表， 并且自适应地调整回波消除系数的误差以消除信号路径中的回波。
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8.发明授权Digital transmitter system employing self-generating predistortion parameter lists and adaptive controller 有权采用自发预失真参数表和自适应控制器的数字发射机系统公开(公告)号：US07289773B2
公开(公告)日：2007-10-30
申请号：US10889636
申请日：2004-07-12
IPC分类号： H04B1/04
CPC分类号： H03F1/3235 , H03F1/3247 , H03F1/3258 , H03F2200/192 , H03F2200/198 , H03F2200/204 , H04L27/368
摘要： A method and apparatus for digital predistortion of power amplifiers are disclosed. Successful digital predistortion parameter settings are correlated with the operating conditions that affect the distortion of an amplifier. These operating conditions may include input power level, carrier frequency, temperature, DC supply voltage, or others. The successful predistortion parameter settings along with the corresponding operating conditions are stored in a list that is indexed using multi-dimensional attribute vectors. The elements of the list are generated automatically.
摘要翻译： 公开了用于功率放大器的数字预失真的方法和装置。 成功的数字预失真参数设置与影响放大器失真的工作条件相关。 这些操作条件可以包括输入功率电平，载波频率，温度，直流供电电压等。 成功的预失真参数设置以及相应的操作条件存储在使用多维属性向量进行索引的列表中。 列表的元素将自动生成。
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9.发明授权Adaptive predistortion linearized amplifier system employing selective sampling 有权采用选择性采样的自适应预失真线性放大器系统公开(公告)号：US07288988B2
公开(公告)日：2007-10-30
申请号：US11401530
申请日：2006-04-11
IPC分类号： H03F1/26
CPC分类号： H03F1/3282 , H03F1/3247 , H03F1/3258 , H03F2200/102 , H03F2200/195 , H03F2200/207 , H03F2200/435 , H03F2201/3227
摘要： An adaptive predistortion linearized amplifier system employing selective sampling is disclosed. Two selective sampling methods of identifying valid measurements using information from the input signal are disclosed. The selective sampling process improves the convergence properties of tuning algorithms based on minimizing the gain error variance. It also reduces the number of data samples processed by the estimator used in the tuning process.
摘要翻译： 公开了一种采用选择性采样的自适应预失真线性放大器系统。 公开了使用来自输入信号的信息来识别有效测量的两种选择性采样方法。 选择性采样过程基于最小化增益误差方差提高了调谐算法的收敛性。 它还减少了在调谐过程中使用的估计器处理的数据样本的数量。
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10.发明授权公开(公告)号：US07095799B2
公开(公告)日：2006-08-22
申请号：US10135918
申请日：2002-04-29
CPC分类号： H04L27/367 , H03F1/3294
摘要： Systems and methods for providing baseband predistortion within a transmitter. In a simplified embodiment, the transmitter contains a main signal path that receives an input signal and generates a main signal in response thereto. A filter in the main signal path is used for removing unwanted signal components from the main signal. A power amplifier having non-linearity is also located within the transmitter. A digital predistortion module is used by the transmitter to digitally process the input signal to generate a predistortion signal that models an inverse of the non-linearity of the power amplifier. In addition, means, located between the filter and the power amplifier, for combining the predistortion signal with the main signal to generate a combined signal, and for providing the combined signal to the power amplifier, is located within the transmitter.
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