公开(公告)号：US08274921B2

公开(公告)日：2012-09-25

申请号：US12060292

申请日：2008-04-01

申请人： Christopher D. Moffatt ,  Anders Mattsson ,  John W. Pajunen

发明人： Christopher D. Moffatt ,  Anders Mattsson ,  John W. Pajunen

IPC分类号： H04K1/10

CPC分类号： H04L27/2628 ,  G06F17/142 ,  H04L27/265

摘要： A system communicates data and includes a transmitter for transmitting a communications signal that carries communications data. It includes an efficient modulator for approximating the frequencies of sine/cosine basis waveforms using complex exponential functions and adding and subtracting the complex exponential functions to generate an Orthogonal Frequency Division Multiplexed (OFDM) communications signal as a plurality of N data subcarriers that carry communications data as data symbols. A receiver receives the OFDM communications signal and includes a demodulation circuit for demodulating the OFDM communications signal using logical shifts of multiples +/−2p based on complex exponential functions corresponding to sine/cosine basis waveform approximations to extract amplitude and phase values from a plurality of N data subcarriers as data symbols within the OFDM communications signal.

摘要翻译： 系统通信数据并包括用于发送携带通信数据的通信信号的发射机。 它包括一个有效的调制器，用于使用复指数函数近似正弦/余弦基波形的频率，并且加上和减去复指数函数以产生正交频分复用（OFDM）通信信号作为携带通信数据的多个N个数据子载波 作为数据符号。 接收机接收OFDM通信信号，并且包括解调电路，用于使用基于与正弦/余弦基波形近似对应的复指数函数的倍数+/- 2p的逻辑移位来解调OFDM通信信号，以从多个 N个数据副载波作为OFDM通信信号内的数据符号。

公开(公告)号：US20120001826A1

公开(公告)日：2012-01-05

申请号：US13039964

申请日：2011-03-03

申请人： Maha Achour ,  Ajay Gummalla ,  Anders Mattsson ,  Vaneet Pathak ,  Gregory Poilasne ,  Sunil Kumar Rajgopal

发明人： Maha Achour ,  Ajay Gummalla ,  Anders Mattsson ,  Vaneet Pathak ,  Gregory Poilasne ,  Sunil Kumar Rajgopal

IPC分类号： H01Q1/36 ,  H01P11/00

CPC分类号： H01Q5/30 ,  H01Q1/38 ,  H01Q9/0428 ,  H01Q15/006 ,  Y10T29/49016 ,  Y10T29/49018

摘要： A wireless device having an antenna structure incorporates a conductive structure to extend an effective length of at least one component of the antenna structure. The enhanced 3-D conductive structure is applicable to a variety of antenna types, including, but not limited to, a CRLH structured antenna.

摘要翻译： 具有天线结构的无线设备包括导电结构以延伸天线结构的至少一个部件的有效长度。 增强的三维导电结构适用于各种天线类型，包括但不限于CRLH结构化天线。

公开(公告)号：US20060159193A1

公开(公告)日：2006-07-20

申请号：US11038997

申请日：2005-01-20

申请人： Anders Mattsson ,  Carlos Abascal

发明人： Anders Mattsson ,  Carlos Abascal

IPC分类号： H04L5/12

CPC分类号： H04L1/0054 ,  H04L1/0059

摘要： Systems and methods are provided for synchronizing a plurality of transmitters in a distributed transmission system. A data source generates a digital signal. A central data processing component inserts synchronization data into the digital signal. The synchronization data includes a periodic reset signal. A plurality of radio frequency transmitters each comprises a Trellis coder. At least one Trellis coder state at each Trellis coder is reinitialized to a predefined default state in response to the reset signal.

公开(公告)号：US08238454B2

公开(公告)日：2012-08-07

申请号：US12060311

申请日：2008-04-01

申请人： Christopher D. Moffatt ,  Anders Mattsson

发明人： Christopher D. Moffatt ,  Anders Mattsson

IPC分类号： H04K1/10

CPC分类号： H04L27/2628 ,  G06F17/142 ,  H04L27/265

摘要： A communications device includes a signal input that receives an orthogonal frequency division multiplexed (OFDM) communications signal. A demodulator is connected to the signal input for receiving the OFDM communications signal and demodulating the OFDM communication signal. It includes at least one memory element for storing the at least one sine/cosine basis waveform approximation as complex exponential functions. A logic circuit performs logical shifts in additions and multiples of +/−2n and extracts amplitude and phase values from a plurality of N data subcarriers within the OFDM communications signal. The demodulator includes efficient implementation of the FFT for use as an OFDM demodulator where the complex exponentials are approximated by multi-level complex sinusoids and optionally oversampled to increase SNR of the FFT output.

摘要翻译： 通信设备包括接收正交频分复用（OFDM）通信信号的信号输入。 解调器连接到信号输入端，用于接收OFDM通信信号并解调OFDM通信信号。 它包括用于将至少一个正弦/余弦基波形近似作为复指数函数存储的至少一个存储元件。 逻辑电路在+/- 2n的相加和倍数中执行逻辑移位，并从OFDM通信信号内的多个N个数据子载波中提取振幅和相位值。 解调器包括用于OFDM解调器的FFT的有效实施，其中复指数由多电平复数正弦曲线近似，并且可选地过采样以增加FFT输出的SNR。

公开(公告)号：US07648090B2

公开(公告)日：2010-01-19

申请号：US11887987

申请日：2006-04-06

申请人： Örjan Ahlgren ,  Anders Mattsson

发明人： Örjan Ahlgren ,  Anders Mattsson

IPC分类号： B02C23/20

CPC分类号： D21D1/303

摘要： A disc housing intended for refiners with refining discs rotating in opposed directions relative to each other is disclosed for mechanically disintegrating and working fibrous material. The disc housing surrounds the refining discs in an air-tight manner, and is provided with an outlet for the worked fibrous material. The inside of the disc housing along its periphery is formed with a channel, which, as seen in the circumferential direction, has a continuously increasing radius, which increases all the way to the outlet, which is located tangentially as a direct continuation of the channel.

摘要翻译： 公开了一种用于精炼机的盘壳，其具有相对于彼此在相反方向旋转的精炼圆盘，用于机械分解和加工纤维材料。 圆盘壳体以气密的方式围绕精炼盘，并且设置有用于加工的纤维材料的出口。 圆盘壳体沿其周边的内部形成有通道，从圆周方向看，该通道具有连续增加的半径，其一直增加到出口，该切口被切向地定位为通道的直接延续 。

公开(公告)号：US08928530B2

公开(公告)日：2015-01-06

申请号：US13039964

申请日：2011-03-03

申请人： Maha Achour ,  Ajay Gummalla ,  Anders Mattsson ,  Vaneet Pathak ,  Gregory Poilasne ,  Sunil Kumar Rajgopal

发明人： Maha Achour ,  Ajay Gummalla ,  Anders Mattsson ,  Vaneet Pathak ,  Gregory Poilasne ,  Sunil Kumar Rajgopal

IPC分类号： H01Q9/04 ,  H01Q15/00 ,  H01Q1/38 ,  H01Q5/00

CPC分类号： H01Q5/30 ,  H01Q1/38 ,  H01Q9/0428 ,  H01Q15/006 ,  Y10T29/49016 ,  Y10T29/49018

摘要： A wireless device having an antenna structure incorporates a conductive structure to extend an effective length of at least one component of the antenna structure. The enhanced 3-D conductive structure is applicable to a variety of antenna types, including, but not limited to, a CRLH structured antenna.

摘要翻译： 具有天线结构的无线设备包括导电结构以延伸天线结构的至少一个部件的有效长度。 增强的3-D导电结构适用于各种天线类型，包括但不限于CRLH结构化天线。

公开(公告)号：US20070242772A1

公开(公告)日：2007-10-18

申请号：US11403458

申请日：2006-04-13

申请人： Anders Mattsson

发明人： Anders Mattsson

IPC分类号： H04L25/03

CPC分类号： H04L27/368 ,  H04L27/2003

摘要： Systems and methods are provided for precorrecting a constant envelope input signal. A phase precorrection component generates a precorrected input signal by applying a phase precorrection to the input signal. The applied phase correction alters an associated phase of the input signal without applying amplitude modulation to the signal. A linear distortion source applies amplitude distortion and phase distortion to the precorrected input signal. The applied phase correction mitigates the phase distortion applied by the linear distortion source.

摘要翻译： 提供了用于预校正恒定包络输入信号的系统和方法。 相位预校正组件通过对输入信号施加相位预校正来产生预校正的输入信号。 所施加的相位校正改变输入信号的相关相位，而不对信号施加幅度调制。 线性失真源对预校正的输入信号施加幅度失真和相位失真。 所施加的相位校正减轻了由线性失真源施加的相位失真。

公开(公告)号：US06377116B1

公开(公告)日：2002-04-23

申请号：US09566642

申请日：2000-05-08

申请人： S. Anders Mattsson ,  Steve F. Russell

发明人： S. Anders Mattsson ,  Steve F. Russell

IPC分类号： H03F126

CPC分类号： H03F1/3241

摘要： A method of deriving a pre-distorter for a corresponding non-linear amplifier is disclosed. The first step of the method is to form the pre-distorter's topology. This is done by first determining a corresponding inverse topology to the non-linear amplifier's topology. The non-linear amplifier has a topology comprising filter and non-linear amplifier elements. The inverse topology comprises corresponding inverse filter and amplifier elements to the amplifier's filter and non-linear amplifier elements. Then, those of the inverse filter and amplifier elements for which compensation with the pre-distorter is desired are selected. Any of the inverse filter and amplifier elements that were not selected are then removed from the inverse topology to form the pre-distorter's topology. Thus, the pre-distorter's topology comprises the selected inverse filter and amplifier elements. After the pre-distorter's topology is determined, a predefined input signal is applied to the non-linear amplifier. In response, measurements of selected signals of the non-linear amplifier are made. Once the measurements are made, coefficients that define the selected inverse filter and amplifier elements' are estimated. This is done in response to the measurements that were made.

摘要翻译： 公开了一种导出相应非线性放大器的预失真器的方法。 该方法的第一步是形成预失真器的拓扑。 这是通过首先确定与非线性放大器的拓扑的对应的逆拓扑来完成的。 非线性放大器具有包括滤波器和非线性放大器元件的拓扑。 反向拓扑包括放大器滤波器和非线性放大器元件的对应的反相滤波器和放大器元件。 然后，选择需要与预失真器进行补偿的反相滤波器和放大器元件的那些。 然后从逆拓扑中除去未选择的任何反向滤波器和放大器元件以形成预失真器的拓扑。 因此，预失真器的拓扑结构包括所选择的反向滤波器和放大器元件。 在确定预失真器的拓扑结构之后，将预定义的输入信号应用于非线性放大器。 作为响应，进行非线性放大器的选定信号的测量。 一旦进行了测量，就可以估计定义所选择的反相滤波器和放大器元件的系数。 这是为了响应所做的测量而完成的。

公开(公告)号：US08229009B2

公开(公告)日：2012-07-24

申请号：US12060283

申请日：2008-04-01

申请人： Christopher D. Moffatt ,  Anders Mattsson ,  John W. Pajunen

发明人： Christopher D. Moffatt ,  Anders Mattsson ,  John W. Pajunen

IPC分类号： H04K1/10

CPC分类号： H04L27/265 ,  G06F17/142 ,  H04L27/2628

摘要： A communications device includes at least one memory device for storing complex exponential functions as approximations of sine and cosine basis waveforms. A logic circuit adds and subtracts the complex exponential functions to generate an Orthogonal Frequency Division Multiplexed (OFDM) communications signal as a plurality of N data subcarriers that carry communications data. The logic circuit provides efficient and accurate implementation of the IFFT for use as an OFDM modulator using additions of stored complex exponentials and modulation of the integer-valued QAM data symbols using logic shifts and sign changes (2's complement).

摘要翻译： 通信设备包括至少一个用于存储复数指数函数作为正弦和余弦基波形近似的存储器件。 逻辑电路加上和减去复指数函数以产生正交频分复用（OFDM）通信信号作为携带通信数据的多个N个数据副载波。 逻辑电路提供了IFFT的有效和准确的实现，用于使用存储的复指数的加法和使用逻辑移位和符号变化（2的补码）对整数值QAM数据符号进行调制而用作OFDM调制器。

公开(公告)号：US06807474B2

公开(公告)日：2004-10-19

申请号：US10366848

申请日：2003-02-14

申请人： Anders Bergqvist ,  Per Anders Mattsson

发明人： Anders Bergqvist ,  Per Anders Mattsson

IPC分类号： G06F700

CPC分类号： B60W10/06 ,  B60W10/04 ,  B60W30/18 ,  B60W30/186 ,  B60W2510/1015 ,  B60W2510/1025 ,  B60W2710/1022 ,  F02D41/021 ,  F02D2250/18 ,  F16H61/66

摘要： A method and a system in a vehicle to control the input torque to a drivetrain member (4) connected to an engine (2) is presented. The method comrises the steps of determining (101, 210) a value of the input torque (Ti) and determining (101, 210) the rotational speed (RPMi) of an input shaft (6) of the drivetrain member (4). A value of a first torque dependent function (Eoi) is calculated (105, 106, 206, 207), based on the rotational speed (RPMi), the value of the input torque (Ti) and a limit value of the input torque (TMax), the value of the input torque (Ti) exceeding the limit value of the input torque (TMax). If the value of the first torque dependent function (Eoi) exceeds a predetermined limit value of the first torque dependent function (EoMax), the input torque is reduced (109, 212).

摘要翻译： 提出了一种用于控制与连接到发动机（2）的传动系构件（4）的输入扭矩的车辆中的方法和系统。 该方法包括确定（101,210）输入扭矩（Ti）的值并确定（101,210）传动系构件（4）的输入轴（6）的转速（RPMi）的步骤。 基于转速（RPMi），输入转矩（Ti）的值和输入转矩的极限值（105,106,206,207）计算第一转矩相关函数（Eoi）的值 TMax），输入转矩（Ti）的值超过输入转矩（TMax）的极限值。 如果第一转矩相关函数（Eoi）的值超过第一转矩相关函数（EoMax）的预定极限值，则输入转矩减小（109,212）。