公开(公告)号：WO0233854A3

公开(公告)日：2003-08-28

申请号：PCT/EP0112114

申请日：2001-10-19

Applicant: ERICSSON TELEFON AB L M ,  PERSSON JOAKIM ,  WILHELMSSON LEIF

Inventor： PERSSON JOAKIM ,  WILHELMSSON LEIF

IPC: H04B7/26 ,  H04L7/02 ,  H04L12/56 ,  H04L7/04 ,  H04L27/233

CPC classification number: H04L7/0054 ,  H04B7/2668 ,  H04L7/0029 ,  H04W56/00

Abstract: A time drift in sampling a received signal that is caused by a relative difference between a transmitter clock and a receiver clock is compensated by estimating a frequency offset between the transmitter clock and the receiver clock, and using the estimated frequency offset to determine a time drift estimate. The time drift estimate is then used to adjust a sampling phase during receipt of the signal. This adjustment may be performed for each sample. Alternatively, the adjustment may be performed only after first receiving a number of samples.

Abstract translation: 通过估计发射机时钟和接收机时钟之间的频率偏移来补偿由发射机时钟和接收机时钟之间的相对差引起的接收信号的采样时间漂移，并且使用估计的频率偏移来确定时间漂移 估计。 然后，时间漂移估算用于在接收信号期间调整采样相位。 可以对每个样品执行该调整。 或者，可以在首先接收多个样本之后执行调整。

公开(公告)号：WO0237692A2

公开(公告)日：2002-05-10

申请号：PCT/EP0112530

申请日：2001-10-30

Applicant: ERICSSON TELEFON AB L M ,  WILHELMSSON LEIF ,  PERSSON JOAKIM ,  HAARTSEN JACOBUS

Inventor： WILHELMSSON LEIF ,  PERSSON JOAKIM ,  HAARTSEN JACOBUS

IPC: H04W36/06 ,  H04W36/30 ,  H04B

CPC classification number: H04W36/30 ,  H04W36/06

Abstract: A dynamic carrier selection method and system permit units operating on a first carrier (0, 1, 2, 3, 75, 76) to change to a second carrier (0, 1, 2, 3, 75, 76) when performance of the first carrier (0, 1, 2, 3, 75, 76) becomes unacceptable. Carrier quality measurements are taken (503) in which carrier quality is a function of interference (I) and multi-path fading and carrier-signal strength (C). The carriers (0, 1, 2, 3, 75, 76) are ranked according to measured quality in a carrier candidate list. The carrier candidate list is used to permit units (403) to determine which carrier (0, 1, 2, 3, 75, 76) they should switch to (402) when the carrier (0, 1, 2, 3, 75, 76) they are currently operating on is determined to have unacceptable performance. Carrier measurements are retaken (503) in response to a carrier change by unit (403) or a predetermined time period having elapsed.

Abstract translation: 动态载波选择方法和系统允许在第一载波（0,1,2,3,75,76）上操作的单元在执行所述第一载波（0,1,2,3,75,76）时改变为第二载波（0,1,2,3,75,76） 第一载体（0,1,2,3,75,76）变得不可接受。 采用载波质量测量（503），其中载波质量是干扰（I）和多径衰落和载波信号强度（C）的函数。 载波（0,1,2,3,75,76）根据载波候选列表中的测量质量进行排序。 载波候选列表用于允许单元（403）确定哪个载波（0,1,2,3,75,76）应该切换到（402）载波（0,1,2,3,75,76） 76）他们目前正在操作是被确定具有不可接受的表现。 响应于以单位（403）的载波改变或已经经过的预定时间段，重新进行载波测量（503）。

公开(公告)号：WO2013000814A3

公开(公告)日：2013-03-07

申请号：PCT/EP2012061969

申请日：2012-06-21

Applicant: ERICSSON TELEFON AB L M ,  LINDOFF BENGT ,  WALLEN ANDERS ,  WILHELMSSON LEIF ,  ERIKSSON ERIK ,  AXMON JOAKIM

Inventor： LINDOFF BENGT ,  WALLEN ANDERS ,  WILHELMSSON LEIF ,  ERIKSSON ERIK ,  AXMON JOAKIM

IPC: H04W48/12 ,  H04W48/16

CPC classification number: H04W72/0493 ,  H04L5/00 ,  H04L5/0053 ,  H04W48/12 ,  H04W48/16

Abstract: A network node that serves a host cell in a cellular communication system transmits, at (a) first time interval(s), first control channel information on a control channel that extends over a first bandwidth of a radiofrequency spectrum. The first control channel communicates information necessary to enable a first type of communication device to receive data from the host cell. The first type of communication device can receive first bandwidth-wide signals. At (a) second time interval(s), second control channel information is transmitted on a second control channel of a first M-cell. The second control channel occupies a second bandwidth that is smaller than the first bandwidth. The second time interval(s) do(es) not coincide with any of the first time interval(s). A second type of communication device having reduced receive bandwidth capabilities compared to those of the first type of communication device is thereby made capable of being served by the node.

Abstract translation: 服务于蜂窝通信系统中的主机小区的网络节点在（a）第一时间间隔处发送关于在射频频谱的第一带宽上延伸的控制信道上的第一控制信道信息。 第一控制信道传送使第一类型的通信设备能够从主机小区接收数据所必需的信息。 第一类型的通信设备可以接收第一带宽宽的信号。 在（a）第二时间间隔处，第二控制信道信息在第一M小区的第二控制信道上传送。 第二控制信道占用小于第一带宽的第二带宽。 第二时间间隔（s）不与第一时间间隔（s）中的任何时间间隔重合。 由此，与第一类型的通信设备相比具有减少的接收带宽能力的第二类型的通信设备能够由该节点服务。

公开(公告)号：WO2013000818A1

公开(公告)日：2013-01-03

申请号：PCT/EP2012/061982

申请日：2012-06-21

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  WALLÉN, Anders ,  LINDOFF, Bengt ,  WILHELMSSON, Leif ,  AXMON, Joakim ,  ERIKSSON, Erik

Inventor： WALLÉN, Anders ,  LINDOFF, Bengt ,  WILHELMSSON, Leif ,  AXMON, Joakim ,  ERIKSSON, Erik

IPC: H04W48/12

CPC classification number: H04W48/12 ,  H04L5/0053 ,  H04L5/0091 ,  H04L5/0094

Abstract: A communication system node transmits first control channel information on a control channel that extends over a first bandwidth of a radio frequency resource. The first control channel information is necessary to enable a first type of communication device, capable of receiving a signal having the first bandwidth, to establish a connection with a host cell. A MIB, occupying a second bandwidth-size part of the first bandwidth, is transmitted. The second bandwidth is smaller than the first bandwidth and is receivable by a second type of communication device having reduced receive bandwidth capabilities. The MIB has a first part comprising first part information necessary to enable the first type of communication device to establish the connection with the host cell, and a second part comprising second part information directly or indirectly enabling the second type of communication device to obtain parameters that enable connection establishment with the host cell.

Abstract translation: 通信系统节点在通过无线电频率资源的第一带宽延伸的控制信道上发送第一控制信道信息。 第一控制信道信息对于能够接收具有第一带宽的信号的第一类型的通信设备来建立与主机小区的连接是必需的。 占用第一带宽的第二带宽大小部分的MIB被发送。 第二带宽小于第一带宽，并且可以由具有降低的接收带宽能力的第二类型的通信设备接收。 MIB具有第一部分，其包括使得第一类型的通信设备能够建立与主机小区的连接所必需的第一部分信息，以及包括第二部分信息的第二部分直接或间接地使第二类型的通信设备获得参数， 启用与主机单元的连接建立。

公开(公告)号：WO2012130896A1

公开(公告)日：2012-10-04

申请号：PCT/EP2012/055536

申请日：2012-03-28

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  WILHELMSSON, Leif ,  LINDOFF, Bengt

Inventor： WILHELMSSON, Leif ,  LINDOFF, Bengt

IPC: H03G3/30 ,  H04L27/26 ,  H04L27/38

CPC classification number: H04B1/123 ,  H03G3/3052 ,  H03G3/3078 ,  H04L27/2647 ,  H04L27/3809

Abstract: A technique for performing Automatic Gain Control for a receiver (102) of a device (100) connected to a communication system is provided. As for a method embodiment, a method (200) comprises the steps of receiving (205) a signal using a gain setting (310; 410; 510; 610) of the receiver (102); at least partially decoding (210) the received signal (301; 401; 501; 601) to obtain a decoding result; and selecting (215) the gain setting based on the decoding result.

Abstract translation: 提供了一种用于对连接到通信系统的设备（100）的接收机（102）执行自动增益控制的技术。 对于方法实施例，方法（200）包括以下步骤：使用接收器（102）的增益设置（310; 410; 510; 610）接收（205）信号; 至少部分地解码（210）所述接收信号（301; 401; 501; 601）以获得解码结果; 以及基于解码结果选择（215）增益设置。

公开(公告)号：WO2012038336A1

公开(公告)日：2012-03-29

申请号：PCT/EP2011/066099

申请日：2011-09-16

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  MU, Fenghao ,  WILHELMSSON, Leif ,  SUNDSTRÖM, Lars

Inventor： MU, Fenghao ,  WILHELMSSON, Leif ,  SUNDSTRÖM, Lars

IPC: H03D7/16 ,  H03D7/18

CPC classification number: H04B1/06 ,  H03D7/166 ,  H03D7/18

Abstract: The invention relates to a complex intermediate frequency (CIF) mixer stage, methods of operation thereof, and methods of calibration thereof. The CIF mixer stage comprises numerous individual mixers driven by IF clock signals to down-convert received IF signals into a set of signals at baseband frequency which are further combined to form a lower side band signal and an upper side band signal. The IF clock signals used have a predefined phase relationship among them, which involves tuneable phase skews. By calibration of the conversion gains and the phases of the IF clock signals the gain and phase imbalance introduced in a preceding radio frequency mixer stage and/or the CIF mixer stage can be cancelled. Further, in-channel IQ leakage control can be applied to the lower side band signal and/or the upper side band signal. The CIF mixer stage can thus effectively suppress image interference and IQ leakage.

Abstract translation: 本发明涉及复杂中频（CIF）混频器级，其操作方法及其校准方法。 CIF混频器级包括由IF时钟信号驱动的多个单独的混频器，以将接收到的IF信号降频转换成基带频率的一组信号，这些信号进一步组合以形成下边带信号和上边带信号。 所使用的IF时钟信号之间具有预定的相位关系，这涉及到可调相位偏移。 通过校准转换增益和IF时钟信号的相位，可以取消在前一个射频混频器级和/或CIF混频器级中引入的增益和相位不平衡。 此外，信道内IQ泄漏控制可以应用于下边带信号和/或上边带信号。 因此，CIF混频器级可以有效地抑制图像干扰和IQ泄漏。

公开(公告)号：WO2012013421A1

公开(公告)日：2012-02-02

申请号：PCT/EP2011/060093

申请日：2011-06-17

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  SUNDSTRÖM, Lars ,  SVENSSON, Jim ,  WILHELMSSON, Leif

Inventor： SUNDSTRÖM, Lars ,  SVENSSON, Jim ,  WILHELMSSON, Leif

IPC: H04B17/00

CPC classification number: H04B17/21 ,  H04B3/46 ,  H04B17/10 ,  H04B17/20 ,  H04B17/309 ,  H04L1/244 ,  H04L27/2647 ,  H04L27/3863

Abstract: A test signal for determining a frequency-dependent or any other property of a receiver path is proposed. The test signal comprises, in a time domain representation, a sequence of discrete states that may be periodically repeated and that gives rise to a plurality of discrete tones in a frequency domain representation of the test signal. The test signal can be utilized for determining a frequency-dependent imbalance (e.g., an IQ imbalance) between different signal branches of a receiver or transmitter.

Abstract translation: 提出了用于确定接收机路径的频率依赖性或任何其他属性的测试信号。 测试信号在时域表示中包括可以周期性重复的离散状态序列，并且在测试信号的频域表示中产生多个离散音调。 测试信号可用于确定接收器或发射器的不同信号分支之间的频率相关不平衡（例如，IQ不平衡）。

公开(公告)号：WO2011044920A1

公开(公告)日：2011-04-21

申请号：PCT/EP2009/007450

申请日：2009-10-16

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  WILHELMSSON, Leif ,  LINDOFF, Bengt

Inventor： WILHELMSSON, Leif ,  LINDOFF, Bengt

IPC: H04W48/16

CPC classification number: H04W48/16 ,  H04W8/005 ,  H04W24/00 ,  H04W76/10 ,  H04W84/12 ,  H04W84/18 ,  H04W88/08

Abstract: A technique for scanning multiple carrier frequencies during a cell search procedure is described. The cell search procedure involves for an investigated frequency multipie serially arranged processing steps until it will be determined that a network connection can be established on the investigated frequency. A method embodiment of this technique comprises performing a first processing step for an investigated first frequency, and in parallel with performing a second or further processing step for the first frequency, performing the first processing step for an investigated second frequency.

Abstract translation: 描述了在小区搜索过程中扫描多个载波频率的技术。 小区搜索过程涉及所研究的频率乘法串行排列的处理步骤，直到确定可以在调查频率上建立网络连接。 该技术的方法实施例包括对所研究的第一频率执行第一处理步骤，并且与执行用于第一频率的第二或另外的处理步骤并行地执行针对所研究的第二频率的第一处理步骤。

公开(公告)号：WO2010029106A1

公开(公告)日：2010-03-18

申请号：PCT/EP2009/061687

申请日：2009-09-09

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  WILHELMSSON, Leif ,  STALA, Michal

Inventor： WILHELMSSON, Leif ,  STALA, Michal

IPC: H04L27/26 ,  H04L27/38 ,  H04L25/02 ,  H04L27/00

CPC classification number: H04L27/2657 ,  H04L25/0202 ,  H04L27/2666 ,  H04L27/2676 ,  H04L27/2695 ,  H04L27/3872 ,  H04L2027/003 ,  H04L2027/0085

Abstract: A method for determining a common phase error for an orthogonal frequency division multiplexed, OFDM, transmission is disclosed. The method comprises receiving a demodulated signal R of the transmission, wherein the demodulated signal R comprises a representation R(n) of a symbol for respective subcarrier n; estimating a symbol X(n) for respective representation R(n); forming a common phase error function for the demodulated signal R based on the demodulated signal R, the estimated symbols X(n), and a function of a channel estimate H(n) for respective subcarrier and at least one other transmission parameter of the transmission; and determining the common phase error from the common phase error function. A computer program for implementing the method, a receiver arrangement enabled to determine common phase error, and a communication apparatus using such receiver arrangement are also disclosed.

Abstract translation: 公开了一种用于确定正交频分复用OFDM传输的公共相位误差的方法。 所述方法包括接收所述传输的解调信号R，其中所述解调信号R包括用于各子载波n的符号的表示R（n） 估计各个表示R（n）的符号X（n）; 基于解调信号R，估计符号X（n）以及相应子载波的信道估计H（n）和传输的至少一个其它传输参数的函数，形成用于解调信号R的公共相位误差函数 ; 并从公共相位误差函数确定公共相位误差。 还公开了一种用于实现该方法的计算机程序，能够确定共同相位误差的接收机布置，以及使用这种接收器装置的通信装置。

公开(公告)号：WO2009127690A1

公开(公告)日：2009-10-22

申请号：PCT/EP2009/054532

申请日：2009-04-16

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  WILHELMSSON, Leif

Inventor： WILHELMSSON, Leif

IPC: H04W72/08

CPC classification number: H04W16/14 ,  H04W88/06

Abstract: A first transceiver is operated in a first frequency band in the presence of a second transceiver operating in a second frequency band. Operation includes ascertaining an interference level at the first transceiver due to the second transceiver. A coexistence strategy for the second transceiver is dynamically selected by selecting a frequency division strategy if the ascertained interference level is less than a threshold level and selecting a time division strategy if the ascertained interference level is above the threshold level. The second transceiver is then caused to operate in accordance with the dynamically selected coexistence strategy.

Abstract translation: 在第二收发器在第二频带存在的情况下在第一频带中操作，第二收发器在第二频带中工作。 操作包括由于第二收发器确定第一收发器处的干扰电平。 如果确定的干扰电平小于阈值电平，则通过选择频分策略来动态选择第二收发器的共存策略，并且如果所确定的干扰电平高于阈值电平则选择时分策略。 然后使第二收发器根据动态选择的共存策略进行操作。