公开(公告)号：US08126070B2

公开(公告)日：2012-02-28

申请号：US12325501

申请日：2008-12-01

申请人： Thord Hyllander ,  Leonard Rexberg ,  Jacob Österling ,  Vimar Björk ,  Tore Mikael André ,  Torbjörn Gunnar Widhe ,  Daniel Larsson

发明人： Thord Hyllander ,  Leonard Rexberg ,  Jacob Österling ,  Vimar Björk ,  Tore Mikael André ,  Torbjörn Gunnar Widhe ,  Daniel Larsson

IPC分类号： H04K1/10

CPC分类号： H04L27/2647 ,  H04L27/2602 ,  H04L27/2626

摘要： A method and base station for forming an OFDM signal from a baseband signal includes a partitioning unit configured to partition a block of baseband signal samples into sub-blocks. A sub-carrier mapper maps the sub-blocks onto adjacent sub-carrier blocks of an OFDM multi-carrier to form corresponding unprefixed OFDM symbols. A cyclic prefix adder adds a cyclic prefix to each mapped sub-block to form prefixed OFDM symbols. Phase compensations force the unprefixed OFDM symbol part of all subsequently up-converted prefixed OFDM symbols to start at the same phase. Up-converters up-convert the phase compensated prefixed OFDM symbols to respective radio frequency bands having center frequencies and bandwidths that preserve the OFDM multi-carrier structure. A combiner combines the up-converted phase compensated prefixed OFDM symbols into an OFDM signal.

摘要翻译： 用于从基带信号形成OFDM信号的方法和基站包括：分配单元，被配置为将基带信号样本块划分成子块。 子载波映射器将子块映射到OFDM多载波的相邻子载波块，以形成对应的未经修正的OFDM符号。 循环前缀加法器向每个映射子块添加循环前缀以形成前缀OFDM符号。 相位补偿迫使所有随后上变频的前缀OFDM符号的未经修正的OFDM符号部分在同一相位开始。 上变频器将相位补偿的前缀OFDM符号上变频到具有保持OFDM多载波结构的中心频率和带宽的各个无线电频带。 组合器将上变频相位补偿的前缀OFDM符号组合成OFDM信号。

公开(公告)号：US20120139776A1

公开(公告)日：2012-06-07

申请号：US12957949

申请日：2010-12-01

申请人： Håkan Malmqvist ,  Leonard Rexberg

发明人： Håkan Malmqvist ,  Leonard Rexberg

IPC分类号： G01S7/40

CPC分类号： G01S7/4026 ,  G01S7/4017 ,  H01Q1/521 ,  H01Q3/267 ,  H01Q21/28

摘要： Embodiments herein include a method for obtaining a calibration parameter for an antenna array. The antenna array comprises a first and a second radio module with respective associated antennas, wherein both radio modules comprise a main transmitter and a connected calibration receiver or both radio modules comprise a main receiver and a connected calibration transmitter. The method comprises: injecting a first calibration signal in the first radio module and measuring a first response to the first calibration in the first radio module. This injecting and measuring is repeated for all combinations of the first and second radio modules. Finally, a numerical value is calculated using the responses; a calibration parameter is calculated based on the calculated numerical value. Embodiments herein also include a corresponding antenna array, computer program and computer program product.

摘要翻译： 本文的实施例包括用于获得天线阵列的校准参数的方法。 天线阵列包括具有各自的相关天线的第一和第二无线电模块，其中两个无线电模块包括主发射机和连接的校准接收机，或者两个无线电模块包括主接收机和连接的校准发射机。 该方法包括：在第一无线电模块中注入第一校准信号，并测量第一无线电模块中对第一校准的第一响应。 针对第一和第二无线电模块的所有组合重复该注入和测量。 最后，使用响应计算数值; 基于计算出的数值计算校准参数。 本文的实施例还包括相应的天线阵列，计算机程序和计算机程序产品。

公开(公告)号：US20110148518A1

公开(公告)日：2011-06-23

申请号：US12447865

申请日：2006-11-01

申请人： Thomas Lejon ,  Leonard Rexberg

发明人： Thomas Lejon ,  Leonard Rexberg

IPC分类号： H03F3/68

CPC分类号： H03G3/3042 ,  H03F1/0205 ,  H03F1/0266 ,  H03F1/0294 ,  H03F1/3294 ,  H03F3/19 ,  H03F3/24 ,  H03F2200/102 ,  H03F2200/252 ,  H03F2200/336

摘要： The present invention relates to methods and devices to control and operate the functionality of a power amplifier system (100) capable of operating in at least three differential amplification modes. The drive signal's amplitude envelope controls an integrated switch network (104; 105, 106) that routes both the signal envelope and signal phase to different modulation blocks (111, 112: 109, 110: 115). Depending on the envelope strength, the operational mode of the amplifier system is possible to alter to best serve the signal statistics to provide the highest overall power efficiency.

摘要翻译： 本发明涉及用于控制和操作能够以至少三种差分放大模式工作的功率放大器系统（100）的功能的方法和装置。 驱动信号的幅度包络控制将信号包络和信号相位两者都传送到不同的调制块（111,112,109,110：115）的集成交换网络（104; 105,106）。 取决于包络强度，放大器系统的工作模式可以改变，以最佳地提供信号统计信息，以提供最高的整体功率效率。

公开(公告)号：US07924942B2

公开(公告)日：2011-04-12

申请号：US10560346

申请日：2003-06-18

申请人： Leonard Rexberg

发明人： Leonard Rexberg

IPC分类号： H04K1/02 ,  H04L25/03

CPC分类号： H03F1/3247 ,  H03F1/3252 ,  H03F1/3294 ,  H03F2201/3209

摘要： A power amplifier pre-distorter is formed by a FIR filter structure which includes an individual look-up table for each filter tap, where each look-up table represents a sampled polynomial in a variable representing signal amplitude, and means for selecting, from each filter tap look-up table, a filter coefficient that depends on the amplitude of a corresponding complex signal value to be multiplied by the filter tap. A training method for such a pre-distorter determines (S1) a first estimate of a first look-up table assigned to a first filter tap, assuming a second look-up table assigned to a second filter tap is set to predetermined table values. Thereafter the method determines (S2) a second estimate of the second look-up table, assuming the first look-up table is set to the determined first estimate. If deemed necessary, the method includes the further steps (a) refining (S3) the first estimate refined, assuming the second look-up table is set to the latest determined second estimate, and (b) refining (S4) the second estimate, assuming the first look-up table is set to the latest determined first estimate. Steps (a) and (b) may be repeated (S5) until convergence is reached.

摘要翻译： 功率放大器预失真器由FIR滤波器结构形成，其包括用于每个滤波器抽头的单独查找表，其中每个查找表表示代表信号幅度的变量中的采样多项式，以及用于从每个 滤波器抽头查找表，取决于要乘以滤波器抽头的相应复信号值的幅度的滤波器系数。 这种预失真器的训练方法确定（S1）分配给第一滤波器抽头的第一查找表的第一估计，假设分配给第二滤波器抽头的第二查找表被设置为预定表值。 此后，假设将第一查找表设置为所确定的第一估计，该方法确定（S2）第二查找表的第二估计。 如果认为有必要，该方法还包括以下步骤：（a）将第二估计值设置为最新确定的第二估计值，并且（b）精化（S4）第二估计值， 假设第一查询表被设置为最新确定的第一估计。 可以重复步骤（a）和（b）（S5），直到达到收敛。

公开(公告)号：US07268620B2

公开(公告)日：2007-09-11

申请号：US10508314

申请日：2003-03-14

申请人： Thorsten Nygren ,  Leonard Rexberg

发明人： Thorsten Nygren ,  Leonard Rexberg

IPC分类号： H03F1/26

CPC分类号： H03F1/3241

摘要： New technology is described to calculate and optimize a pre-distorter avoiding the need of time-alignment between input and output of the amplifier. An analog output spectrum is used to compute an optimum pre-distorter, either in digital or analog format. The output spectrum is used to optimize intermodulation performance rather than trying to match the input spectrum to the output spectrum. The output spectrum (except for a possible gain constant) can be used as input to the optimization procedure. Since the intermodulation products usually are of much lower amplitude than the carriers themselves, it can be taken as the input spectrum without major loss of confinement. Mathematical procedures to calculate a pre-distorter using only the output signal are outlined.

摘要翻译： 描述了新技术来计算和优化预失真器，避免了放大器的输入和输出之间的时间对准。 模拟输出频谱用于计算数字或模拟格式的最佳预失真器。 输出光谱用于优化互调性能，而不是尝试将输入光谱与输出光谱相匹配。 输出频谱（可能的增益常数除外）可用作优化过程的输入。 由于互调产物的幅度通常低于载波本身的幅度要低得多，所以它可以作为输入频谱，而没有大的限制损失。 概述了仅使用输出信号计算预失真器的数学程序。

公开(公告)号：US08416126B2

公开(公告)日：2013-04-09

申请号：US12957949

申请日：2010-12-01

申请人： Håkan Malmqvist ,  Leonard Rexberg

发明人： Håkan Malmqvist ,  Leonard Rexberg

IPC分类号： G01S7/40 ,  H01Q3/26

CPC分类号： G01S7/4026 ,  G01S7/4017 ,  H01Q1/521 ,  H01Q3/267 ,  H01Q21/28

摘要： Embodiments herein include a method for obtaining a calibration parameter for an antenna array. The antenna array comprises a first and a second radio module with respective associated antennas, wherein both radio modules comprise a main transmitter and a connected calibration receiver or both radio modules comprise a main receiver and a connected calibration transmitter. The method comprises: injecting a first calibration signal in the first radio module and measuring a first response to the first calibration in the first radio module. This injecting and measuring is repeated for all combinations of the first and second radio modules. Finally, a numerical value is calculated using the responses; a calibration parameter is calculated based on the calculated numerical value. Embodiments herein also include a corresponding antenna array, computer program and computer program product.

摘要翻译： 本文的实施例包括用于获得天线阵列的校准参数的方法。 天线阵列包括具有各自的相关天线的第一和第二无线电模块，其中无线电模块包括主发射机和连接的校准接收机，或者两个无线电模块包括主接收机和连接的校准发射机。 该方法包括：在第一无线电模块中注入第一校准信号，并测量第一无线电模块中对第一校准的第一响应。 针对第一和第二无线电模块的所有组合重复该注入和测量。 最后，使用响应计算数值; 基于计算出的数值计算校准参数。 本文的实施例还包括相应的天线阵列，计算机程序和计算机程序产品。

公开(公告)号：US20100097153A1

公开(公告)日：2010-04-22

申请号：US12443704

申请日：2006-10-27

申请人： Leonard Rexberg ,  Håkan Malmqvist ,  Thomas Lejon

发明人： Leonard Rexberg ,  Håkan Malmqvist ,  Thomas Lejon

IPC分类号： H03K7/08

CPC分类号： H03F1/02 ,  H03F1/0205 ,  H03F1/32 ,  H03F3/211 ,  H03F3/217 ,  H03F3/2175 ,  H03F3/2176 ,  H03F3/24 ,  H03F2200/336 ,  H03F2200/351 ,  H03F2200/451 ,  H03F2203/21157 ,  H04B2203/5483 ,  H04L25/4902 ,  H04L27/362

摘要： Switch-modulation of a radio-frequency power amplifier by-representing the input signal by the I-signal (1) and Q-signal (9) of the complex components (I+j−Q), and pulse width modulating the I-signal and the Q-signal separately to create a modulated I-signal pulse sequence (3a) and a modulated Q-signal pulse sequence (3b). Further, the pulses corresponding to negative sample values are time-shifted relative the pulses corresponding to positive sample values, and each pulse of the I-signal pulse sequence is delayed by introducing a delaying time shift.

摘要翻译： 通过由复分量（I + j-Q）的I信号（1）和Q信号（9）代替输入信号的射频功率放大器的开关调制，以及调制I- 信号和Q信号分别产生调制的I信号脉冲序列（3a）和调制的Q信号脉冲序列（3b）。 此外，对应于负采样值的脉冲相对于对应于正采样值的脉冲进行时移，并且通过引入延迟时间偏移来延迟I信号脉冲序列的每个脉冲。

公开(公告)号：US20070063770A1

公开(公告)日：2007-03-22

申请号：US10560346

申请日：2003-06-18

申请人： Leonard Rexberg

发明人： Leonard Rexberg

IPC分类号： H03F1/26

CPC分类号： H03F1/3247 ,  H03F1/3252 ,  H03F1/3294 ,  H03F2201/3209

摘要： A power amplifier pre-distorter is formed by a FIR filter structure which includes an individual look-up table for each filter tap, where each look-up table represents a sampled polynomial in a variable representing signal amplitude, and means for selecting, from each filter tap look-up table, a filter coefficient that depends on the amplitude of a corresponding complex signal value to be multiplied by the filter tap. A training method for such a pre-distorter determines (S1) a first estimate of a first look-up table assigned to a first filter tap, assuming a second look-up table assigned to a second filter tap is set to predetermined table values. Thereafter the method determines (S2) a second estimate of the second look-up table, assuming the first look-up table is set to the determined first estimate. If deemed necessary, the method includes the further steps (a) refining (S3) the first estimate refined, assuming the second look-up table is set to the latest determined second estimate, and (b) refining (S4) the second estimate, assuming the first look-up table is set to the latest determined first estimate. Steps (a) and (b) may be repeated (S5) until convergence is reached.

摘要翻译： 功率放大器预失真器由FIR滤波器结构形成，其包括用于每个滤波器抽头的单独查找表，其中每个查找表表示代表信号幅度的变量中的采样多项式，以及用于从每个 滤波器抽头查找表，取决于要乘以滤波器抽头的相应复信号值的幅度的滤波器系数。 这种预失真器的训练方法确定（S1）分配给第一滤波器抽头的第一查找表的第一估计，假设分配给第二滤波器抽头的第二查找表被设置为预定表值 。 此后，假设将第一查找表设置为所确定的第一估计，该方法确定（S 2）第二查找表的第二估计。 如果认为必要的话，该方法包括以下步骤：（a）将第二估计值设定为最新确定的第二估计值，并且（b）精化（S 4）第二估计值， 估计，假设第一查询表被设置为最新确定的第一估计。 可以重复步骤（a）和（b）（S 5），直到达到收敛。

公开(公告)号：US06462704B2

公开(公告)日：2002-10-08

申请号：US09773810

申请日：2001-01-31

申请人： Leonard Rexberg ,  Bernt Johansson

发明人： Leonard Rexberg ,  Bernt Johansson

IPC分类号： G01S740

CPC分类号： H01Q3/267 ,  G01S7/4017

摘要： A method and a system for an array antenna calibration are disclosed. The method and system provide a sensor system presenting a sensor device at each antenna element, which sensor devices include digital receivers. Each digital receiver produces a complex base-band I/Q-signal. The outputs of the digital receivers are fed to a Digital Signal Processing device for adding them up to obtain a resulting signal which when converted to a DC signal presents a maximum if all individual signals have the same phase. The search for a maximum of this DC voltage is then used by the Digital Signal Processor for creating source signal phase control signals. By adjusting source signal phases for obtaining maximum added DC voltage derived from the sensor system the phases at the antenna elements will be calibrated. In this manner an adaptive array antenna is simply calibrated even during operation by compensating the base-band I/Q-signals for the intentional phase settings used for achieving a specific channel adaptive array antenna direction.

摘要翻译： 公开了一种用于阵列天线校准的方法和系统。 该方法和系统提供在每个天线元件处呈现传感器装置的传感器系统，哪些传感器装置包括数字接收器。 每个数字接收机产生复杂的基带I / Q信号。 数字接收机的输出被馈送到数字信号处理装置，用于将它们相加以获得结果信号，当转换成DC信号时，如果所有单独的信号具有相同的相位则呈现最大值。 搜索该直流电压的最大值然后由数字信号处理器用于创建源信号相位控制信号。 通过调整源信号相位以获得从传感器系统导出的最大附加DC电压，天线元件上的相位将被校准。 以这种方式，即使在操作期间，通过补偿用于实现特定信道自适应阵列天线方向的有意相位设置的基带I / Q信号也可简单校准自适应阵列天线。

公开(公告)号：US09215120B2

公开(公告)日：2015-12-15

申请号：US13333736

申请日：2011-12-21

申请人： Leonard Rexberg ,  Håkan Malmqvist

发明人： Leonard Rexberg ,  Håkan Malmqvist

IPC分类号： H04L27/26 ,  H04B1/00 ,  H04B1/04

CPC分类号： H04L27/2624 ,  H04B1/0046 ,  H04B1/005 ,  H04B1/0475 ,  H04L5/001

摘要： Clipping a widely-separated, multi-carrier signal is effectively performed without having to use a high sampling speed. Clipping is performed in a first stage at a combined signal level, but with a predetermined carrier separation of at least twice the channel bandwidth (2CBW), followed by repositioning the carriers at baseband zero frequency. After clipping, carriers are placed at their respective center frequencies with full carrier separation reintroduced in a second stage. Iterative clipping stages smooth out signal reshaping and re-settled amplitudes for combined carriers.

摘要翻译： 在不需要使用高采样速度的情况下，有效地执行广泛分离的多载波信号的剪切。 在组合信号电平的第一级中执行剪切，但是具有至少两倍于信道带宽（2CBW）的预定载波间隔，随后在基带零频率处重新定位载波。 在剪辑之后，将载波放置在它们各自的中心频率处，并在第二阶段重新引入全载波分离。 迭代剪辑阶段平滑了组合载波的信号整形和重建振幅。