公开(公告)号：WO2009127357A3

公开(公告)日：2010-04-22

申请号：PCT/EP2009002634

申请日：2009-04-09

Applicant: ERICSSON TELEFON AB L M ,  LINDOFF BENGT ,  BERNHARDSSON BO ,  NORDSTROEM FREDRIK

Inventor： LINDOFF BENGT ,  BERNHARDSSON BO ,  NORDSTROEM FREDRIK

IPC: H04L27/00 ,  H04B1/00 ,  H04B1/38 ,  H04B1/40

CPC classification number: H04L27/0014

Abstract: 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.

Abstract translation: 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射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：WO2005048546A2

公开(公告)日：2005-05-26

申请号：PCT/EP2004012797

申请日：2004-11-11

Applicant: ERICSSON TELEFON AB L M ,  WILHELMSSON LEIF ,  ANDERSSON LENNART ,  BERNHARDSSON BO

Inventor： WILHELMSSON LEIF ,  ANDERSSON LENNART ,  BERNHARDSSON BO

IPC: H04L25/02 ,  H04L27/26

CPC classification number: H04L25/0234 ,  H04L5/0048 ,  H04L25/022 ,  H04L25/0222 ,  H04L27/2647

Abstract: Methods and apparatus that achieve good channel estimation without using unnecessarily complex interpolation filters are described. Adaptive interpolation filtering of a signal in a receiver includes determining at least one correlation function parameter of the channel and determining a filter configuration based on the correlation function parameter. The interpolation may be performed in time, where a Doppler frequency shift can serve as the correlation function parameter, or in frequency, where a root mean square or maximum delay spread can serve as the correlation function parameter, or both. A worst case signal-to-noise ratio may be used in determining the filter configuration, or, optionally, the signal-to-noise ratio can be determined in real time. The filter configuration can be determined in real time or selected from one of a plurality of predetermined configurations having different complexities.

Abstract translation: 描述了不使用不必要的内插滤波器实现良好信道估计的方法和装置。 接收机中的信号的自适应插值滤波包括确定信道的至少一个相关函数参数，并且基于相关函数参数来确定滤波器配置。 可以在时间上执行插值，其中多普勒频移可以用作相关函数参数，或频率，其中均方根或最大延迟扩展可以用作相关函数参数，或两者。 可以使用最坏情况的信噪比来确定滤波器配置，或者可选地，可以实时地确定信噪比。 滤波器配置可以实时确定或者从具有不同复杂度的多个预定配置之一中选择。

公开(公告)号：WO2004026483A8

公开(公告)日：2004-07-29

申请号：PCT/EP0310026

申请日：2003-09-10

Applicant: ERICSSON TELEFON AB L M ,  BERNHARDSSON BO ,  NILSSON JOHAN ,  JONSSON ELIAS ,  LINDOFF BENGT

Inventor： BERNHARDSSON BO ,  NILSSON JOHAN ,  JONSSON ELIAS ,  LINDOFF BENGT

IPC: H04B7/005 ,  H04W52/40 ,  H04W52/56

CPC classification number: H04W52/56 ,  H04W52/40

Abstract: Methods, receivers, and computer program products for defining asymmetric decision regions of a symbol space to interpret transmitted power control commands are disclosed. A method of determining transmitted power control commands at a. receiver can include defining a first decision region of a symbol space associated with a first power control command at the receiver and a second decision region of the symbol space associated with a second power control command at the receiver where the first and second regions are asymmetric with one another. Methods of determining a transmitted power control command during soft handover mode in a wideband code division multiple access communications system are also discussed wherein a first determination of a combined power control command received from a plurality of transmitters can be combined with a second determination of the combined power control command received from the plurality of transmitters to provide a combined power control command. Related circuits are, disclosed as well.

Abstract translation: 公开了用于定义符号空间的不对称决策区以解释发射功率控制命令的方法，接收机和计算机程序产品。 一种确定发射功率控制命令的方法。 接收器可以包括定义与在接收器处的第一功率控制命令相关联的符号空间的第一判定区域和符号空间的与在接收器处的第二功率控制命令相关联的第二判定区域，其中第一和第二区域与 另一个。 还讨论了在宽带码分多址通信系统中在软切换模式期间确定发射功率控制命令的方法，其中可以将从多个发射机接收的组合功率控制命令的第一确定与组合功率控制命令的第二确定 从多个发射机接收的功率控制命令以提供组合的功率控制命令。 相关电路也被公开。

公开(公告)号：WO2011051252A3

公开(公告)日：2011-06-30

申请号：PCT/EP2010066110

申请日：2010-10-26

Applicant: ERICSSON TELEFON AB L M ,  LINDOFF BENGT ,  BERNHARDSSON BO ,  KAZMI MUHAMMAD

Inventor： LINDOFF BENGT ,  BERNHARDSSON BO ,  KAZMI MUHAMMAD

IPC: H04L25/02 ,  H04B17/00

CPC classification number: H04L25/022 ,  H04B17/26 ,  H04B17/309 ,  H04B17/364 ,  H04B17/373 ,  H04L25/0222 ,  H04L25/0232

Abstract: In one aspect, a method and apparatus derive channel quality estimates for given subcarriers in an OFDM signal, based on reference signal (RS) or other known-signal measurements made for another set of subcarriers. In at least one embodiment, a wireless communication apparatus implements a method whereby it is configured for receiving reference information on the first set of subcarriers; generating the first channel quality estimates in the frequency domain, based on the received reference information; computing a power delay profile for the first set of subcarriers; and determining the second channel quality estimates either by extrapolating from the first channel quality estimates or as an average of the first channel quality estimates, depending on a delay spread of the power delay profile.

Abstract translation: 在一个方面，一种方法和设备基于参考信号（RS）或针对另一副载波集合做出的其他已知信号测量来导出OFDM信号中给定副载波的信道质量估计。 在至少一个实施例中，无线通信装置实现一种方法，由此其被配置用于接收关于第一副载波集合的参考信息; 基于接收到的参考信息在频域中生成第一信道质量估计; 计算第一副载波集合的功率延迟分布; 以及根据所述功率延迟分布的延迟扩展，通过从所述第一信道质量估计进行外插或作为所述第一信道质量估计的平均来确定所述第二信道质量估计。

公开(公告)号：WO2006066843A3

公开(公告)日：2006-08-10

申请号：PCT/EP2005013646

申请日：2005-12-19

Applicant: ERICSSON TELEFON AB L M ,  ANDERSSON LENNART ,  NILSSON JOHAN ,  LINDOFF BENGT ,  BERNHARDSSON BO

Inventor： ANDERSSON LENNART ,  NILSSON JOHAN ,  LINDOFF BENGT ,  BERNHARDSSON BO

IPC: H04B7/005

CPC classification number: H04W52/125 ,  H04W52/08 ,  H04W52/225 ,  H04W52/24 ,  H04W52/246

Abstract: A method for generating a power control command in a transceiver in a wireless communication system, where method comprises the steps of calculating, at the beginning of a predefined time period, a quality measure reference value (306), generating, repeatedly during the predefined time period; an estimated quality measure value (307) of a signal received at the transceiver; genarting a power control command (313) in dependence of the estimated quality measure value (307) and the quality measure reference value (306); and generating, a number of times during the predefined time period, a modified quality measure reference value (309) from the quality measure reference value (306). The step of generating the power control command comprises comparing the estimated quality measure value (307) with the modified quality measure reference value (309). A power control unit (300), comprising a quality measure estimator (308), a calculator (310), a first controller (303), a second controller (302) and an inner loop element (312), is configured to implement the method.

Abstract translation: 一种用于在无线通信系统中的收发机中产生功率控制命令的方法，其中该方法包括以下步骤：在预定时间周期的开始处计算质量测量参考值（306）;在预定时间内重复产生 期; 在收发器处接收到的信号的估计质量测量值（307） 根据所估计的质量测量值（307）和质量测量参考值（306）来确定功率控制命令（313）; 以及在所述预定义的时间段期间从所述质量度量参考值（306）生成修改的质量度量参考值（309）。 生成功率控制命令的步骤包括将估计质量测量值（307）与修改质量测量参考值（309）进行比较。 包括质量度量估计器（308），计算器（310），第一控制器（303），第二控制器（302）和内部回路元件（312）的功率控制单元（300）被配置为实现 方法。

公开(公告)号：BRPI0818651A2

公开(公告)日：2015-04-07

申请号：BRPI0818651

申请日：2008-08-27

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDOFF BENGT ,  BERNHARDSSON BO ,  NILSSON JOHAN

IPC: H04B1/707 ,  H04L27/26

公开(公告)号：DE602007008465D1

公开(公告)日：2010-09-23

申请号：DE602007008465

申请日：2007-11-08

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDOFF BENGT ,  BERNHARDSSON BO ,  NILSSON JOHAN

IPC: H04L27/00 ,  H04L27/26

公开(公告)号：AT362236T

公开(公告)日：2007-06-15

申请号：AT04708351

申请日：2004-02-05

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDOFF BENGT ,  PALENIUS TORGNY ,  BERNHARDSSON BO

IPC: H04B7/005 ,  H04W52/22 ,  H04W52/28 ,  H04W52/36

Abstract: A method for controlling transmission power from a wireless transceiver. Signal to interference ratios (SIRs) are estimated for a signal that is received from another wireless device. An out-of-sync condition between the wireless transceiver and the other wireless device is identified based on the SIRs. Change of the transmission power from the wireless transceiver is restricted based on the SIRs and when an out-of-sync condition has not been identified.

公开(公告)号：CA2625609A1

公开(公告)日：2007-05-03

申请号：CA2625609

申请日：2006-10-25

Applicant: ERICSSON TELEFON AB L M

Inventor： BERNHARDSSON BO ,  LARSSON PER-OLA ,  WILHELMSSON LEIF

IPC: H04L25/02

Abstract: A method and apparatus for predicting channel estimates for non-received signal frequencies provides knowledge of propagation channel characteristics for non-received frequencies. One embodiment predicts uplink (or downlink) channel estimates based on measured downlink (or uplink) channel estimates, which is advantageous in systems having different uplink and downlink frequencies. Another embodiment predicts channel responses for non-received OFDM sub carrier frequencies based on measuring channel responses for received OFDM sub carrier frequencies. Such processing may comprise, for example, measuring channel responses for received OFDM pilot sub carriers, predicting channel responses at frequency intervals corresponding to pilot sub carrier spacing, and interpolating between those values to predict channel responses at data sub carrier frequencies.

公开(公告)号：AU2003298994A1

公开(公告)日：2004-04-08

申请号：AU2003298994

申请日：2003-09-19

Applicant: ERICSSON TELEFON AB L M

Inventor： BERNHARDSSON BO ,  HRNJEZ TATJANA ,  JONSSON ELIAS ,  OHLSSON JONAS ,  ZIREN MIKAEL

IPC: H03J7/04

Abstract: An automatic frequency control (AFC) system in an electronic device is operated by using an AFC-algorithm component to determine a frequency error corresponding to a difference between a frequency of a signal output from a signal generator and a received signal frequency. The frequency error determined by the AFC-algorithm component is multiplied by a scaling factor, which is set to zero after an adjustment has been made to change a frequency of the signal output from the signal generator. The scaling factor is increased from zero to one over time. The scaled frequency error is used to determine whether to adjust the frequency of the signal output from the signal generator.