公开(公告)号：US08718542B2

公开(公告)日：2014-05-06

申请号：US12888295

申请日：2010-09-22

Applicant: Richard Neil Braithwaite

Inventor： Richard Neil Braithwaite

IPC: H04B7/15 ,  H04B7/14 ,  H04B3/36 ,  H04W36/00

CPC classification number: H04W16/26 ,  H04B7/2606 ,  H04W16/32 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/449

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07742535B2

公开(公告)日：2010-06-22

申请号：US11642281

申请日：2006-12-19

Applicant: Richard Neil Braithwaite

Inventor： Richard Neil Braithwaite

IPC: H04L27/28 ,  H04L25/49

CPC classification number: H04L27/2614

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07157967B2

公开(公告)日：2007-01-02

申请号：US11018216

申请日：2004-12-21

Applicant: Richard Neil Braithwaite

Inventor： Richard Neil Braithwaite

IPC: H03F1/00

CPC classification number: H03F1/3235

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20150303984A1

公开(公告)日：2015-10-22

申请号：US14698004

申请日：2015-04-28

Applicant: Richard Neil Braithwaite

Inventor： Richard Neil Braithwaite

IPC: H04B1/525 ,  H04L5/00 ,  H04B1/48

CPC classification number: H04B1/525 ,  H04B1/48 ,  H04B2001/485 ,  H04L5/0048

Abstract: A system and methods for cancelling transmission leakage signals in a wide bandwidth Distributed Antenna System (“DAS”) having remote units is disclosed. An internal cancellation circuit within the remote unit is employed to reduce the transmitted leakage signals by generating a cancellation signal. This cancellation signal is added to the received signal to cancel the transmission leakage signal in the receiving signal path. A pilot signal generation circuit is employed to optimize the cancellation circuit operating parameters. The frequency of the pilot signal is swept over a range to determine the pilot frequency having the highest electromagnetic coupling. The amplitude and phase of the cancellation signal is then optimized to minimize the level of transmission leakage in the receiving transmission path.

Abstract translation: 公开了一种在具有远程单元的宽带宽分布式天线系统（“DAS”）中消除传输泄漏信号的系统和方法。 采用远程单元内的内部消除电路，通过产生消除信号来减少传输的泄漏信号。 该消除信号被加到接收信号上以消除接收信号路径中的传输泄漏信号。 采用导频信号发生电路来优化消除电路的工作参数。 导频信号的频率在一个范围内扫描，以确定具有最高电磁耦合的导频。 然后优化抵消信号的振幅和相位以使接收传输路径中的传输泄漏水平最小化。

公开(公告)号：US20150163021A1

公开(公告)日：2015-06-11

申请号：US14565181

申请日：2014-12-09

Applicant: Richard Neil Braithwaite

Inventor： Richard Neil Braithwaite

IPC: H04L1/18 ,  H04W72/04 ,  H04B7/155

CPC classification number: H04W40/22 ,  H04B7/155 ,  H04L1/1816 ,  H04L1/1822 ,  H04L1/1887 ,  H04L1/1893 ,  H04L2001/0097 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042 ,  H04W84/047

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20110070824A1

公开(公告)日：2011-03-24

申请号：US12888295

申请日：2010-09-22

Applicant: Richard Neil Braithwaite

Inventor： Richard Neil Braithwaite

IPC: H04B7/14 ,  H04W88/00

CPC classification number: H04W16/26 ,  H04B7/2606 ,  H04W16/32 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/449

Abstract: 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.

Abstract translation: 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。 因此，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。

公开(公告)号：US07769103B2

公开(公告)日：2010-08-03

申请号：US11520216

申请日：2006-09-13

Applicant: Scott Carichner ,  Richard Neil Braithwaite ,  Nikolai Maslennikov ,  Matthew J. Hunton

Inventor： Scott Carichner ,  Richard Neil Braithwaite ,  Nikolai Maslennikov ,  Matthew J. Hunton

IPC: H04L25/49

CPC classification number: H03F1/3294 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F2200/102 ,  H03F2200/216 ,  H04L27/364 ,  H04L27/368

Abstract: A predistortion linearized amplifier system that uses analog polynomial based predistortion is disclosed. An analog polynomial function generator receives polynomial parameter updates from a polynomial parameter generator. The polynomial parameter generator uses a combination of analog and digital signal processing to create the parameter updates. This processing is performed on input signal amplitude, detected using analog circuits, and RF coupled samples of the input signal, and the output signal. By using a combination of analog and digital signal processing means, digital processing can be performed at sub-Nyquist rates, significantly reducing the cost of digital circuits. Also, since the predistortion modulation signal is created with an analog function generator, time correlating delay is minimized reducing circuit costs.

Abstract translation: 公开了一种使用模拟多项式的预失真的预失真线性放大器系统。 模拟多项式函数发生器从多项式参数发生器接收多项式参数更新。 多项式参数发生器使用模拟和数字信号处理的组合来创建参数更新。 对使用模拟电路检测的输入信号幅度和输入信号的RF耦合样本以及输出信号进行该处理。 通过使用模拟和数字信号处理装置的组合，可以以次奈奎斯特速率进行数字处理，显着降低数字电路的成本。 此外，由于预失真调制信号是用模拟函数发生器产生的，所以时间相关延迟最小化降低了电路成本。

公开(公告)号：US20100098139A1

公开(公告)日：2010-04-22

申请号：US12577009

申请日：2009-10-09

Applicant: Richard Neil Braithwaite

Inventor： Richard Neil Braithwaite

IPC: H04L27/28 ,  H04B1/38 ,  H04L27/00

CPC classification number: H04L27/2621

Abstract: In the disclosed system and method phase (and optionally amplitude) shifts are applied at an OFDM transmitter to resource blocks within a given slot to implement Crest Factor Reduction (CFR). The phase shifts may differ between resource blocks and are selected to reduce the peaks in the OFDM waveform. The resource block phase shifts do not affect the demodulation process when the equalization at the receiver is performed on individual blocks separately. As a result, the crest factor reduction is achieved without increasing the EVM or BER in the received signal. In addition, a computational efficient algorithm for determining the resource block phase shifts needed for CFR is disclosed.

Abstract translation: 在所公开的系统和方法阶段（以及可选的振幅）移位在OFDM发射机处施加到给定时隙内的资源块以实现波峰因数降低（CFR）。 资源块之间的相移可能不同，并且被选择以减少OFDM波形中的峰值。 当分别对各个块执行接收机的均衡时，资源块相移不影响解调过程。 结果，在不增加接收信号中的EVM或BER的情况下实现波峰因数降低。 此外，公开了一种用于确定CFR所需的资源块相移的计算有效算法。

公开(公告)号：US06985706B2

公开(公告)日：2006-01-10

申请号：US10761788

申请日：2004-01-21

Applicant: Richard Neil Braithwaite

Inventor： Richard Neil Braithwaite

IPC: H04B1/16

CPC classification number: H03F1/3258 ,  H03F1/3235 ,  H03F1/3247 ,  H03F2200/192 ,  H03F2200/198 ,  H03F2200/204

Abstract: A method and apparatus for rapid alignment of adaptive feed forward power amplifiers are disclosed. Successful alignment settings are correlated with the operating conditions that affect the gain and phase of an amplifier. These operating conditions may include input power level, carrier frequency, temperature, DC supply voltage, or others. The successful alignment 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.

Abstract translation: 公开了一种用于自适应前馈功率放大器的快速对准的方法和装置。 成功的对准设置与影响放大器增益和相位的工作条件相关。 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。 成功的对准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。

公开(公告)号：US06566948B1

公开(公告)日：2003-05-20

申请号：US10084702

申请日：2002-02-26

Applicant: Richard Neil Braithwaite

Inventor： Richard Neil Braithwaite

IPC: H03F126

CPC classification number: H03F1/3247

Abstract: Non-linearities of signal-generation circuits that typically include a series arrangement of a modulator and a power amplifier are reduced by connecting a measurement circuit to an output of the signal-generation circuit and at another point along a signal path of the signal-generation circuit. A predistorted input signal is applied to an input of the signal-generation circuit. The pre-distorted signal includes a constant component and a time-varying component, such that the predistorted input signal excites non-linear modes of the signal-generation circuit. The measurement circuit is balanced so that a portion of the predistorted input signal that passes through the measurement circuit does not include a time-varying component and therefore does not excite non-linearities of the measurement circuit. Adjustments are made to the predistorted input signal in order to reduce non-linearities of the signal-generation circuit.

Abstract translation: 典型地包括调制器和功率放大器的串联布置的信号发生电路的非线性通过将测量电路连接到信号发生电路的输出，并沿着信号发生的信号路径的另一点来减小 电路。 将预失真的输入信号施加到信号发生电路的输入端。 预失真信号包括恒定分量和时变分量，使得预失真输入信号激发信号发生电路的非线性模式。 测量电路是平衡的，使得通过测量电路的预失真输入信号的一部分不包括时变分量，因此不激发测量电路的非线性。 为了减少信号发生电路的非线性，对预失真输入信号进行调整。