公开(公告)号：WO02073917A8

公开(公告)日：2003-12-24

申请号：PCT/EP0200602

申请日：2002-01-22

Applicant: ERICSSON TELEFON AB L M ,  WILHELMSSON LEIF ,  WALLEN ANDERS ,  KOKKE ROBERT

Inventor： WILHELMSSON LEIF ,  WALLEN ANDERS ,  KOKKE ROBERT

IPC: H04L1/18 ,  H04L25/03 ,  H04L27/00 ,  H04L27/06 ,  H04L27/14

CPC classification number: H04L25/03006 ,  H04L1/1809 ,  H04L7/0037 ,  H04L2025/03783 ,  H04L2027/0065 ,  H04L2027/0095

Abstract: Performing channel estimation with a limited receiver includes performing a first estimation of a first portion of a signal to obtain first parameters of the portion of the signal. The first portion of the signal has predetermined offsets added during transmission. The predetermined offsets are based on the modulation format of a second portion. The first and second portions have different modulation formats. The first portion of the signal is demodulated using the first parameters to recover data symbols. An equalizer is tranined using a decision directed technique to obtain equalizer coefficients. The demodulated first portion of the signal is checked to confirm correct demodulation. The second protion of the signal is then demodulated using the equalizer coefficents.

Abstract translation: 用有限的接收机执行信道估计包括执行信号的第一部分的第一估计以获得信号的该部分的第一参数。 信号的第一部分在传输期间具有预定的偏移量。 预定的偏移是基于第二部分的调制格式。 第一和第二部分具有不同的调制格式。 使用第一参数来解调信号的第一部分以恢复数据符号。 使用决策技术来转移均衡器以获得均衡器系数。 检查信号的解调的第一部分以确认正确的解调。 然后使用均衡器系数解调信号的第二次。

公开(公告)号：WO0237692A8

公开(公告)日：2002-12-05

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 ,  H04Q7/38

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: 在第一载波（0,1,2,3,75,76）上执行操作时，动态载波选择方法和系统允许单元在执行第一载波（0,1,2,3,75,76）时变为第二载波（0,1,2,3,75,76） 第一载波（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。 载波候选者列表用于当载波（0,1,2,3,75,76）被选择时允许单元（403）确定他们应该切换到哪个载波（0,1,2,3,75,76）（402） 76）他们目前正在经营的行为被确定为具有不可接受的表现。 响应于单位（403）的载波改变或已经过去的预定时间周期，重新载波测量（503）。

公开(公告)号：WO2002078195A3

公开(公告)日：2002-10-03

申请号：PCT/EP2002/002777

申请日：2002-03-12

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

Inventor： WILHELMSSON, Leif

IPC: H03M13/05

Abstract: Method and apparatus (30) for decoding block-coded data which has been transmitted by means of differential modulation. The method first attempts to decode all codewords using an error correcting code (100), and if at least one codeword is still not decoded, uses a correctly decoded codeword to locate a possibly erroneous code symbol in the at least one codeword, alters the possibly erroneous code symbol (120), and again attempts to decode the at least one codeword (130). The invention recognizes that errors in such data typically occur in pairs, and utilizes this property to improve the decoding process.

公开(公告)号：WO2002069556A1

公开(公告)日：2002-09-06

申请号：PCT/EP2002/002114

申请日：2002-02-27

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  PERSSON, Joakim ,  WILHELMSSON, Leif

Inventor： PERSSON, Joakim ,  WILHELMSSON, Leif

IPC: H04L7/04

CPC classification number: H04L1/0061 ,  H04L1/205 ,  H04L7/0083 ,  H04L7/048

Abstract: A method for maintaining synchronization between a transmitter and a receiver is disclosed. The method offsets time drift which causes a degradation in the quality of communication between a transmitter and a reciver. The method comprises using a first sampling time to obtain a first sequence of hard decision symbols for decoding contents of a portion of a received packet, switching to a second sampling time upon degradation in a reliability of the symbols, and using the second sampling time to obtain a second sequence of hard decision symbols for decoding contents of a remaining portion of the received packet.

Abstract translation: 公开了一种用于维持发射机和接收机之间的同步的方法。 该方法抵消时间漂移，导致发射机和修剪器之间的通信质量下降。 该方法包括使用第一采样时间来获得用于解码接收分组的一部分的内容的硬判决符号的第一序列，在符号的可靠性劣化时切换到第二采样时间，并且使用第二采样时间 获得用于解码接收到的分组的剩余部分的内容的硬判决符号的第二序列。

公开(公告)号：WO2014047907A1

公开(公告)日：2014-04-03

申请号：PCT/CN2012/082394

申请日：2012-09-28

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON(PUBL) ,  LINDOFF, Bengt ,  LU, Qianxi ,  MIAO, Qingyu ,  WILHELMSSON, Leif

Inventor： LINDOFF, Bengt ,  LU, Qianxi ,  MIAO, Qingyu ,  WILHELMSSON, Leif

IPC: H04W76/00

CPC classification number: H04W36/0011 ,  H04W4/80 ,  H04W36/00 ,  H04W36/165 ,  H04W72/0453 ,  H04W76/14 ,  H04W84/042

Abstract: The present disclosure relates to a method of a first radio device (102) in non- network assisted device-to-device (D2D) communication with a second radio device (103) using a first frequency resource and a first communication protocol. The method comprises determining that the first radio device is within coverage of a cellular network (100). The method also comprises connecting to the cellular network. The method also comprises sending a message to the second radio device, informing said second radio device that the first radio device is within coverage of the cellular network. The method also comprises receiving a message from the cellular network comprising information about a second frequency resource and a second communication protocol. The method also comprises initiating a handover of the D2D communication from the first frequency resource and communication protocol to the second frequency resource and communication protocol.

Abstract translation: 本公开涉及在使用第一频率资源和第一通信协议的第二无线电设备（103）的非网络辅助设备到设备（D2D）通信中的第一无线电设备（102）的方法。 该方法包括确定第一无线电设备在蜂窝网络（100）的覆盖范围内。 该方法还包括连接到蜂窝网络。 该方法还包括向第二无线电设备发送消息，通知所述第二无线电设备第一无线电设备在蜂窝网络的覆盖范围内。 该方法还包括从蜂窝网络接收包括关于第二频率资源和第二通信协议的信息的消息。 该方法还包括启动D2D通信从第一频率资源和通信协议到第二频率资源和通信协议的切换。

公开(公告)号：WO2013030010A1

公开(公告)日：2013-03-07

申请号：PCT/EP2012/066073

申请日：2012-08-17

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

Inventor： WILHELMSSON, Leif ,  LINDOFF, Bengt

IPC: H04W84/04 ,  H04W72/04 ,  H04B7/155 ,  H04W72/12

CPC classification number: H04W72/1215 ,  H04B7/15542 ,  H04W72/0406 ,  H04W84/047

Abstract: A relay node is operated in a communication system wherein the relay node communicates with a communication system node via a first link and communicates with user equipment (EU) via a second link. The relay node detects whether a collision between its own uplink transmission on the first link and receipt of the user's transmission on the second link at a future time instant is expected to occur, wherein the collision will interfere with the relay node's ability to receive the UE's transmission. If so, then, the relay node selects and executes one of a plurality of interference averting measures, selection being based at least in part on what type of information is expected to be transmitted and received on the respective first and second links. First and second interference averting measures comprise refraining from or proceeding with transmission of some information to the communication system node.

Abstract translation: 中继节点在通信系统中操作，其中中继节点经由第一链路与通信系统节点进行通信，并经由第二链路与用户设备（EU）进行通信。 中继节点检测是否发生自己在第一链路上的上行链路传输与未来时刻在第二链路上接收用户传输之间的冲突，其中冲突将干扰中继节点接收UE的上行传输的能力 传输。 如果是，则中继节点选择并执行多个干扰避免措施中的一个，至少部分地基于期望在相应的第一和第二链路上发送和接收什么类型的信息。 第一和第二干扰避免措施包括避免或继续向通信系统节点传送一些信息。

公开(公告)号：WO2012084537A1

公开(公告)日：2012-06-28

申请号：PCT/EP2011/072230

申请日：2011-12-08

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  LINDOFF, Bengt ,  WILHELMSSON, Leif ,  SUNDSTRÖM, Lars

Inventor： LINDOFF, Bengt ,  WILHELMSSON, Leif ,  SUNDSTRÖM, Lars

IPC: H04B15/06 ,  H04L27/26

CPC classification number: H04L27/2649 ,  H04B15/06 ,  H04L27/2657 ,  H04L2027/0016 ,  H04L2027/0032 ,  H04L2027/0065

Abstract: Methods and a receiver of positioning a spurious signal for reducing the impact of the spurious signal on a received Orthogonal Frequency Division Multiplexing, OFDM signal, are presented. The method comprises determining the frequency of a spurious signal (steps 102, 204, 404), determining the frequency for the respective sub-carrier of the OFDM signal and the difference between the frequency of a sub-carrier and the frequency of a spurious signal (steps 104, 206, 406), and adjusting at least one of: the frequency of the first oscillator (step 208) and a parameter related to the frequency of a second oscillator, to decrease the frequency difference between a sub-carrier and a spurious signal (steps 106, 212, 408). By positioning a spurious signal at or near a sub-carrier frequency, the performance impact of the spurious signal is reduced, and the receiver performance improved.

Abstract translation: 提出了一种定位杂散信号以减少寄生信号对接收到的正交频分复用OFDM信号的影响的方法和接收机。 该方法包括确定寄生信号的频率（步骤102,204,404），确定OFDM信号的相应子载波的频率以及子载波的频率与寄生信号的频率之间的差异 （步骤104,206,406），并且调整第一振荡器的频率（步骤208）和与第二振荡器的频率相关的参数中的至少一个，以降低副载波和第二振荡器之间的频率差 寄生信号（步骤106,212,408）。 通过在副载波频率处或附近定位杂散信号，减少了杂散信号的性能影响，并提高了接收机性能。

公开(公告)号：WO2012055778A1

公开(公告)日：2012-05-03

申请号：PCT/EP2011/068422

申请日：2011-10-21

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  LINDOFF, Bengt ,  WILHELMSSON, Leif ,  OLSSON, Thomas

Inventor： LINDOFF, Bengt ,  WILHELMSSON, Leif ,  OLSSON, Thomas

IPC: H04B7/06 ,  H04B7/08 ,  H04B7/04

CPC classification number: H04B7/0608 ,  H04B7/0417 ,  H04B7/0691 ,  H04B7/0874

Abstract: Disclosed herein is a method of communicating a digital signal via a wireless communications channel between a transmitter and a receiver, at least one of the transmitter and the receiver comprising a plurality of transducers for transforming a signal between an electrical signal and a wireless signal. Embodiments of the method comprises determining (S302; S602) a property of the communications channel; based on at least the determined property, selecting (S303, S305) a number of transducers from the plurality of transducers; and communicating (S304) a digital signal from the transmitter to the receiver using the selected number of transducers.

Abstract translation: 本文公开了一种通过发射机和接收机之间的无线通信信道传送数字信号的方法，所述发射机和接收机中的至少一个包括用于在电信号和无线信号之间变换信号的多个换能器。 该方法的实施例包括确定（S302; S602）通信信道的属性; 至少基于所确定的属性，从所述多个换能器中选择（S303，S305）多个换能器; 以及使用所选数量的换能器将数字信号从发射机（S304）传送到接收机。

公开(公告)号：WO2012055469A1

公开(公告)日：2012-05-03

申请号：PCT/EP2011/004756

申请日：2011-09-22

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (Publ) ,  WILHELMSSON, Leif ,  SUNDSTRÖM, Lars

Inventor： WILHELMSSON, Leif ,  SUNDSTRÖM, Lars

IPC: H04B7/155

CPC classification number: H04B7/15585 ,  H04B7/155 ,  H04B15/00

Abstract: A technique for self-interference suppression control for a relay node is provided. The relay node comprises a transmitter and a receiver, and is adapted to transmit and received simultaneously using the same frequency channel or using proximate frequency channels. The relay node further comprises an interference signal estimator having a first input adapted to receive a transmitter signal from the transmitter, a second input adapted to receive adaptation metric and an output adapted to output an estimated interference signal generated by the interference signal estimator based on the transmitter signal and the adaptation metric. A subtractor is coupled to the output of interference signal estimator and configured to subtract the estimated interference signal from a received signal in the receiver so as to actively cancel a signal transmitted from the relay node that leaks back into the receiver of the relay node to suppress self-interference.

Abstract translation: 提供了一种用于中继节点的自干扰抑制控制的技术。 中继节点包括发射机和接收机，并且适于使用相同的频率信道或使用接近的频率信道同时发射和接收。 所述中继节点还包括干扰信号估计器，所述干扰信号估计器具有适于从所述发射机接收发射机信号的第一输入端，适于接收自适应度量的第二输入端和适于输出由干扰信号估计器产生的估计干扰信号的输出， 发射机信号和适应度量。 减法器耦合到干扰信号估计器的输出，并且被配置为从接收机中的接收信号中减去所估计的干扰信号，从而主动地消除从中继节点发送的信号，该信号泄漏回中继节点的接收机以抑制 自干扰。

公开(公告)号：WO2012013679A1

公开(公告)日：2012-02-02

申请号：PCT/EP2011/062834

申请日：2011-07-26

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  PARK, Chester ,  SUNDSTRÖM, Lars ,  SVENSSON, Jim ,  WILHELMSSON, Leif

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

IPC: H04L27/26 ,  H04B17/00 ,  H04L27/36

CPC classification number: H04B17/004 ,  H04B17/0085 ,  H04B17/20 ,  H04L27/2647 ,  H04L27/364 ,  H04L27/366

Abstract: The invention proposes a way of inserting an analog test signal during normal reception into analog blocks of an OFDM receiver in such a way that the reception is either not corrupted at all, or only very little. This is achieved either by inserting the analog test signal in time or frequency where it does not corrupt the received signal, or by accounting for the interfering analog test signal in the decoding process.

Abstract translation: 本发明提出了一种在正常接收期间将模拟测试信号插入到OFDM接收机的模拟块中的方式，使得接收完全没有被破坏，或者只是很少。 这可以通过在不损坏接收信号的时间或频率插入模拟测试信号，或通过考虑解码过程中的干扰模拟测试信号来实现。