公开(公告)号：US20130237171A1

公开(公告)日：2013-09-12

申请号：US13885186

申请日：2011-11-24

申请人： Bengt Lindoff ,  Fredrik Nordström

发明人： Bengt Lindoff ,  Fredrik Nordström

IPC分类号： H04W52/02

CPC分类号： H04W52/0261 ,  H04W52/0232 ,  H04W52/0274 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/24

摘要： A receiver is operated in a first power mode, for example a high power mode, during a first portion of a particular connection state (for example, a RRC_CONNECTED state in LTE when the UE receiver is on) of a communication protocol being used by the telecommunications network, and a second power mode during a second portion of the particular connection state, for example a low power mode.

摘要翻译： 在特定连接状态的第一部分（例如，当UE接收机处于接通状态的LTE中的RRC_CONNECTED状态）时，接收机以第一功率模式操作，例如高功率模式。 电信网络以及在特定连接状态的第二部分期间的第二功率模式，例如低功率模式。

公开(公告)号：US20120219041A1

公开(公告)日：2012-08-30

申请号：US13036523

申请日：2011-02-28

申请人： Bengt Lindoff ,  Fredrik Nordström ,  Leif Wilhelmsson

发明人： Bengt Lindoff ,  Fredrik Nordström ,  Leif Wilhelmsson

IPC分类号： H04B1/38

CPC分类号： H04L25/03343 ,  H04L27/2646 ,  H04W56/0015 ,  H04W56/0045

摘要： An Orthogonal Frequency Division Multiplexing (OFDM) symbol for transmission from a non-reference transceiver to a user equipment (UE) in a mobile communication system is generated by ascertaining a general timing for transmission of OFDM symbols, wherein the general timing is associated with a reference transceiver. A UE timing relative to the general timing is ascertained. An initial resource element (RE) value is adjusted by a pre-compensating amount to obtain a pre-compensated RE value, wherein the pre-compensating amount is based on the UE timing relative to the general timing. The pre-compensated resource element value is supplied as one of a plurality of values to be transmitted. An IFFT is performed on the plurality of values to be transmitted to obtain pre-compensated initial signal information. A cyclic prefix is appended to the pre-compensated initial signal information to form an OFDM symbol for transmission from the non-reference transceiver to the UE.

摘要翻译： 通过确定用于OFDM符号的传输的一般定时来生成用于在移动通信系统中从非参考收发器到用户设备（UE）的传输的正交频分复用（OFDM）符号，其中，一般定时与 参考收发器。 确定相对于一般定时的UE定时。 通过预补偿量来调整初始资源元素（RE）值以获得预补偿RE值，其中预补偿量基于相对于一般定时的UE定时。 预补偿资源元素值被提供为要发送的多个值之一。 对要发送的多个值执行IFFT以获得预补偿的初始信号信息。 将循环前缀附加到预补偿的初始信号信息以形成用于从非参考收发器到UE的传输的OFDM符号。

公开(公告)号：US08023600B2

公开(公告)日：2011-09-20

申请号：US12138743

申请日：2008-06-13

申请人： Bengt Lindoff ,  Johan Nilsson ,  Fredrik Nordström ,  Leif Wilhelmsson

发明人： Bengt Lindoff ,  Johan Nilsson ,  Fredrik Nordström ,  Leif Wilhelmsson

IPC分类号： H04L1/02 ,  H03D1/04 ,  H04B15/00

CPC分类号： H04B7/086 ,  H04B17/345 ,  H04J11/005 ,  H04J11/0093 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0242

摘要： A multi-branch OFDM receiver combines diversity signals received over different receiver branches using interference rejection combining. The receiver generates first channel estimates associated with a serving base station, second channel estimates associated with at least one non-serving base station, and a time offset between the serving base station and non-serving base station. The receiver computes a noise covariance matrix based on the second channel estimates and the time offset, and then combines the diversity signals received over different branches using the first channel estimates and the noise covariance matrix.

摘要翻译： 多分支OFDM接收机使用干扰抑制组合来组合在不同接​​收机分支上接收的分集信号。 接收机产生与服务基站相关联的第一信道估计，与至少一个非服务基站相关联的第二信道估计，以及服务基站与非服务基站之间的时间偏移。 接收机基于第二信道估计和时间偏移来计算噪声协方差矩阵，然后使用第一信道估计和噪声协方差矩阵组合在不同分支上接收的分集信号。

公开(公告)号：US07991378B2

公开(公告)日：2011-08-02

申请号：US12198366

申请日：2008-08-26

申请人： Bengt Lindoff ,  Bo Bernhardsson ,  Fredrik Nordström

发明人： Bengt Lindoff ,  Bo Bernhardsson ,  Fredrik Nordström

IPC分类号： H04B1/16

CPC分类号： H04L27/0014

摘要： Methods and apparatus for automatic frequency control in wireless receivers configured to simultaneously receive multiple carrier signals at distinct radio frequencies are disclosed. An exemplary wireless device comprises at least first and second radio front-end circuits configured to receive first and second wireless communication signals transmitted via first and second radio-frequency carriers at distinct first and second radio frequencies, respectively, a control processor configured to designate a master carrier signal and a slave carrier signal from among the received wireless communication signals, and a frequency error estimation circuit configured to estimate a first receiver frequency error using the received master carrier signal. The control processor is further configured to calculate a second receiver frequency error from the first receiver frequency error, for use in compensating one or more receiver processes performed on the slave carrier signal.

摘要翻译： 公开了用于在不同射频同时接收多个载波信号的无线接收机中的自动频率控制的方法和装置。 示例性无线设备包括至少第一和第二无线电前端电路，其被配置为分别接收在不同的第一和第二无线电频率处经由第一和第二无线电频率载波发送的第一和第二无线通信信号，控制处理器被配置为指定 来自所接收的无线通信信号中的主载波信号和从载波信号;以及频率误差估计电路，被配置为使用所接收的主载波信号来估计第一接收机频率误差。 控制处理器还被配置为从第一接收机频率误差计算第二接收机频率误差，用于补偿对从属载波信号执行的一个或多个接收机处理。

公开(公告)号：US07965780B2

公开(公告)日：2011-06-21

申请号：US11957118

申请日：2007-12-14

申请人： Bengt Lindoff ,  Fredrik Nordström

发明人： Bengt Lindoff ,  Fredrik Nordström

IPC分类号： H04L27/28

CPC分类号： H04L25/03343 ,  H04B7/0417 ,  H04B7/0639 ,  H04B17/364 ,  H04L1/0025 ,  H04L5/0023 ,  H04L25/0222 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04L2025/03808

摘要： A pre-coding matrix is determined in an OFDMA, multiple transmit antenna communication system having a number of sub-carriers grouped into a number, M, of resource blocks. This involves determining a frequency selectivity of a channel through which received signals have propagated. A number N of selected resource blocks is then determined as a function of the frequency selectivity the N selected resource blocks being those for which pre-coding matrices will be determined, wherein N

摘要翻译： 在具有分组为资源块的数量M的多个子载波的OFDMA中的多个发射天线通信系统中确定预编码矩阵。 这涉及确定接收信号通过其传播的信道的频率选择性。 然后，所选择的资源块的数量N被确定为频率选择性的函数，N个选择的资源块是将被确定预编码矩阵的资源块，其中N

公开(公告)号：US08744020B2

公开(公告)日：2014-06-03

申请号：US13127044

申请日：2009-10-30

申请人： Niklas Andgart ,  Fredrik Nordström

发明人： Niklas Andgart ,  Fredrik Nordström

IPC分类号： H04L27/06

CPC分类号： H04L27/2659 ,  H04L5/0007 ,  H04L25/023

摘要： A frequency offset of a received signal comprising a number of subsequently received data symbols is estimated. A first estimate is determined from a calculated change in phase of the received signal between two received symbols having a first time distance between them. At least one further estimate is determined from a calculated change in phase of the received signal between two received symbols having a different time distance. A frequency periodicity is determined for each estimate from the distance between the two received symbols from which the estimate was determined. A set of integer values is determined for each estimate so that frequency values calculated for each estimate as the frequency periodicity multiplied by the integer value added to the estimate are at least approximately equal to each other, and a corrected estimate of the frequency offset is determined from the integer values.

摘要翻译： 估计包括多个随后接收的数据符号的接收信号的频率偏移。 从在它们之间具有第一时间距离的两个接收符号之间的接收信号的计算的相位变化确定第一估计。 从具有不同时间距离的两个接收符号之间的接收信号的计算的相位变化确定至少一个另外的估计。 根据确定估计的两个接收符号之间的距离为每个估计确定频率周期。 为每个估计确定一组整数值，使得为每个估计计算的频率值作为频率周期乘以加到估计的整数值至少近似相等，并且确定频率偏移的校正估计 从整数值。

公开(公告)号：US08416873B2

公开(公告)日：2013-04-09

申请号：US12400234

申请日：2009-03-09

申请人： Bo Lincoln ,  Fredrik Nordström

发明人： Bo Lincoln ,  Fredrik Nordström

IPC分类号： H04B7/02

CPC分类号： H04B7/0697 ,  H04B7/0452 ,  H04L2025/03426

摘要： A method and apparatus is provided for demodulating a desired data stream in a MU-MIMO communication system where only the precoder for the desired data stream is known a priori. The receiving terminal according to various embodiments of the present invention estimates the precoder for one or more interfering data streams. The receiving terminal can then use the known precoder for the desired data stream and the estimated precoders for the interfering data streams to perform MMSE demodulation.

摘要翻译： 提供了一种在MU-MIMO通信系统中解调所需数据流的方法和装置，其中只有预先知道所需数据流的预编码器是先验的。 根据本发明的各种实施例的接收终端估计一个或多个干扰数据流的预编码器。 然后，接收终端可以使用已知的预编码器用于期望的数据流，以及用于干扰数据流的估计的预编码器执行MMSE解调。

公开(公告)号：US08594210B2

公开(公告)日：2013-11-26

申请号：US12746518

申请日：2008-12-08

申请人： Leif Wilhelmsson ,  Lars Björkman ,  Fredrik Nordström

发明人： Leif Wilhelmsson ,  Lars Björkman ,  Fredrik Nordström

IPC分类号： H04L27/28

CPC分类号： H04L27/2662 ,  H04L5/0007 ,  H04L25/0216 ,  H04L25/022 ,  H04L25/0232 ,  H04L27/2657 ,  H04L27/2665

摘要： Methods for positioning an FFT-window in an OFDM-receiver are disclosed as well as electronic apparatuses and computer program products for performing the methods. The method comprises determining a position of the FFT-window in relation to one or more OFDM-symbols of a received OFDM-signal, using the position of the FFT-window to obtain a first OFDM-symbol from the received OFDM-signal, and applying an FFT to the first OFDM-symbol to produce an FFT-output signal. The method also comprises determining a frequency dependent phase rotation component of the FFT-output signal, and removing the determined frequency dependent phase rotation component from the FFT-output signal to obtain a compensated FFT-output signal. A delay spread estimate is calculated based on at least one of the FFT-output signal and the compensated FFT-output signal, and the position of the FFT-window is adjusted based on at least the determined frequency dependent phase rotation component and the calculated delay spread estimate.

摘要翻译： 公开了在OFDM接收机中定位FFT窗口的方法以及用于执行方法的电子设备和计算机程序产品。 该方法包括使用FFT窗口的位置从接收的OFDM信号中获得第一OFDM符号来确定FFT窗口相对于接收的OFDM信号的一个或多个OFDM符号的位置，以及 对第一OFDM符号应用FFT以产生FFT输出信号。 该方法还包括确定FFT输出信号的频率相关相位旋转分量，以及从FFT输出信号中去除所确定的频率相关相位旋转分量以获得经补偿的FFT输出信号。 基于FFT输出信号和经补偿的FFT输出信号中的至少一个来计算延迟扩展估计，并且至少基于所确定的频率相关相位旋转分量和所计算的延迟来调整FFT窗口的位置 传播估计。

公开(公告)号：US08213873B2

公开(公告)日：2012-07-03

申请号：US12900559

申请日：2010-10-08

申请人： Christian Bergljung ,  Fredrik Nordström

发明人： Christian Bergljung ,  Fredrik Nordström

IPC分类号： H04B17/00

CPC分类号： H04L1/0026 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0632 ,  H04L1/0027 ,  H04L1/0029 ,  H04L1/0031

摘要： According to one aspect, the present invention advantageously provides a method and apparatus that increase communications throughput by manipulating the order or manner in which CQI values are reported in a multi-rank CQI report that constrains one or more such values according to reporting order. As a non-limiting example, the present invention provides that the reporting order used for reporting multiple CQI values is chosen to eliminate or at least reduce under-reporting and over-reporting errors arising from the use of differential reporting formats for one or more of the reported CQI values. Additionally, the present invention provides for selection between single-rank or multi-rank CQI reporting, based on determining which one corresponds to the highest channel capacity, in view of the differential reporting constraints.

摘要翻译： 根据一个方面，本发明有利地提供一种通过操纵按照报告顺序约束一个或多个这样的值的多级CQI报告中报告CQI值的顺序或方式来提高通信吞吐量的方法和装置。 作为非限制性示例，本发明提供用于报告多个CQI值的报告顺序被选择以消除或至少减少由于使用差异报告格式而产生的不足报告和过度报告错误， 报告的CQI值。 另外，鉴于差分报告约束，本发明基于确定哪个对应于最高信道容量来提供单级或多级CQI报告之间的选择。