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公开(公告)号：WO9810550A3
公开(公告)日：1998-06-18
申请号：PCT/SE9701455
申请日：1997-09-01
Applicant: TELIA AB , ISAKSSON MIKAEL , JOHANSSON MAGNUS , TONVALL HARRY , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , BAHLENBERG GUNNAR , ISAKSSON ANDERS , OEKVIST GOERAN , LJUNGGREN LIS-MARIE , NORDSTROEM TOMAS , ISAKSSON LARS-AAKE , BENGTSSON DANIEL , HAAKANSSON SIWERT , WEN YE
Inventor： ISAKSSON MIKAEL , JOHANSSON MAGNUS , TONVALL HARRY , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , BAHLENBERG GUNNAR , ISAKSSON ANDERS , OEKVIST GOERAN , LJUNGGREN LIS-MARIE , NORDSTROEM TOMAS , ISAKSSON LARS-AAKE , BENGTSSON DANIEL , HAAKANSSON SIWERT , WEN YE
CPC classification number: H04L27/2647
Abstract: When a multi-carrier signal is received, it is sampled and digitised before FFT processing, (or wavelet transform processing). Multi-carrier signals consist of many narrow band carrier waves which convey data via a wide band channel. The amplitude distribution of the sum of all the individual carriers is Gaussian. This means that high amplitudes occur with low probability. At the present time, analogue to digital convertors have a limited dynamic range. It is, therefore, normal practice to provide a compromise between cutting and quantisation noise. This means that the adverse effects of a coarse quantisation have to be balanced against signal distortions caused by loss of the low probability high amplitude signals. 00000
Abstract translation: 当接收到多载波信号时，在FFT处理（或小波变换处理）之前对其进行采样和数字化处理。 多载波信号由许多通过宽带信道传送数据的窄带载波组成。 所有单个载波的和的幅度分布是高斯。 这意味着高幅度以低概率发生。 目前，模数转换器的动态范围有限。 因此，在切割和量化噪声之间提供妥协是正常的做法。 这意味着粗略量化的不利影响必须与由低概率高幅度信号的损失引起的信号失真相平衡。 00000
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2.发明申请
公开(公告)号：WO9810555A3
公开(公告)日：1998-06-04
申请号：PCT/SE9701460
申请日：1997-09-01
Applicant: TELIA AB , ISAKSSON MIKAEL , JOHANSSON MAGNUS , TONVALL HARRY , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , BAHLENBERG GUNNAR , ISAKSSON ANDERS , OEKVIST GOERAN , LJUNGGREN LIS MARIE , NORDSTROEM TOMAS , ISAKSSON LARS AAKE , BENGTSSON DANIEL , HAAKANSSON SIWERT , WEN YE
Inventor： ISAKSSON MIKAEL , JOHANSSON MAGNUS , TONVALL HARRY , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , BAHLENBERG GUNNAR , ISAKSSON ANDERS , OEKVIST GOERAN , LJUNGGREN LIS-MARIE , NORDSTROEM TOMAS , ISAKSSON LARS-AAKE , BENGTSSON DANIEL , HAAKANSSON SIWERT , WEN YE
CPC classification number: H04L25/03159 , H04L1/0065 , H04L1/0071 , H04L27/2649 , H04L27/2656 , H04L27/2657 , H04L27/2662 , H04L2025/03414 , H04L2025/03522
Abstract: Modern multi-carrier techniques using orthogonal carriers with high order QAM constellations for the transmission of a plurality of bits per carrier and symbol, use some method for the determination of an inverse channel model to be used in an equalisation process. In the frequency domain, this is normally based on an estimate of the channel attenuation and phase for each carrier. The present invention provides a simplified method of equalisation that uses data at the symbol detector input and output to adaptively estimate an inverse channel model.
Abstract translation: 使用具有高阶QAM星座的正交载波用于每载波和符号传输多个比特的现代多载波技术使用某种方法来确定将在均衡过程中使用的反向信道模型。 在频域中，这通常基于每个载波的信道衰减和相位的估计。 本发明提供了一种简化的均衡方法，该方法使用符号检测器输入和输出处的数据来自适应地估计逆信道模型。
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3.发明申请
公开(公告)号：WO9810553A3
公开(公告)日：1998-05-07
申请号：PCT/SE9701458
申请日：1997-09-01
Applicant: TELIA AB , ISAKSSON MIKAEL , JOHANSSON MAGNUS , TONVALL HARRY , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , BAHLENBERG GUNNAR , ISAKSSON ANDERS , OEKVIST GOERAN , LJUNGGREN LIS MARIE , NORDSTROEM TOMAS , ISAKSSON LARS AAKE , BENGTSSON DANIEL , HAAKANSSON SIWERT , WEN YE
Inventor： ISAKSSON MIKAEL , JOHANSSON MAGNUS , TONVALL HARRY , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , BAHLENBERG GUNNAR , ISAKSSON ANDERS , OEKVIST GOERAN , LJUNGGREN LIS-MARIE , NORDSTROEM TOMAS , ISAKSSON LARS-AAKE , BENGTSSON DANIEL , HAAKANSSON SIWERT , WEN YE
CPC classification number: H04L5/006 , H04L1/0065 , H04L1/0071 , H04L5/0007 , H04L5/0046 , H04L27/3461
Abstract: In certain types of transmission system using nQAM it may be desirable to use a control channel superimposed on a nQAM data channel. In such circumstances it is very desirable to be able to separate control channel data from user data without using a higher level protocol layer. For applications in multi-carrier systems with variable bit-loading it is particularly desirable that the control channel data be separable from user data when the value of n, i.e. the bit-loading, or constellation identifier are unknown. Binary data is transmitted using nQAM modulation. The binary data comprises both user data and control data. This means that a control channel is superimposed on a user data channel within the same nQAM constellation. Separation of said control data is facilitated by arranging control data points to have either unique phase, or unique amplitude, values. These unique values are not employed for user data points.
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4.发明申请
公开(公告)号：WO9810547A3
公开(公告)日：1998-05-07
申请号：PCT/SE9701452
申请日：1997-09-01
Applicant: TELIA AB , ISAKSSON MIKAEL , JOHANSSON MAGNUS , TONVALL HARRY , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , BAHLENBERG GUNNAR , ISAKSSON ANDERS , OEKVIST GOERAN , LJUNGGREN LIS MARIE , NORDSTROEM TOMAS , ISAKSSON LARS AAKE , BENGTSSON DANIEL , HAAKANSSON SIWERT , WEN YE
Inventor： ISAKSSON MIKAEL , JOHANSSON MAGNUS , TONVALL HARRY , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , BAHLENBERG GUNNAR , ISAKSSON ANDERS , OEKVIST GOERAN , LJUNGGREN LIS-MARIE , NORDSTROEM TOMAS , ISAKSSON LARS-AAKE , BENGTSSON DANIEL , HAAKANSSON SIWERT , WEN YE
CPC classification number: H04L27/2675 , H04L27/2656 , H04L27/2657
Abstract: In a multi-carrier system, such as a DMT system, a receiver must be able to recover a sampling clock that is very accurately synchronized to a transmitter sampling clock. Typically, synchronization is achieved by using a reserved carrier, the pilot carrier, which is transmitted with a fixed phase. The receiver sampling clock is then phase locked to the pilot carrier. Frame timing can be recovered by using a correlation technique. The present invention provides an improved method of recovering a sample clock and phase locking the sampling clock to a pilot carrier.
Abstract translation: 在诸如DMT系统的多载波系统中，接收机必须能够恢复非常准确地与发射机采样时钟同步的采样时钟。 典型地，通过使用保留载波（导频载波）来实现同步，该导频载波以固定相位进行传输。 接收器采样时钟然后锁相到导频载波。 帧定时可以通过使用相关技术来恢复。 本发明提供了一种恢复采样时钟并将采样时钟锁相到导频载波的改进方法。
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公开(公告)号：WO1998010554A2
公开(公告)日：1998-03-12
申请号：PCT/SE1997001459
申请日：1997-09-01
Applicant: TELIA AB (publ) , ISAKSSON, Mikael , JOHANSSON, Magnus , TONVALL, Harry , OLSSON, Lennart , STEFANSSON, Tomas , ÖHMAN, Hans , BAHLENBERG, Gunnar , ISAKSSON, Anders , ÖKVIST, Göran , LJUNGGREN, Lis-Marie , NORDSTRÖM, Tomas , ISAKSSON, Lars-Åke , BENGTSSON, Daniel , HÅKANSSON, Siwert , WEN, Ye
Inventor： TELIA AB (publ)
IPC: H04L05/06
CPC classification number: H04L5/006 , H04L1/0065 , H04L1/0071 , H04L5/0007 , H04L5/0046
Abstract: The invention provides a multi-carrier transmission system, for example, a DMT based VDSL system, using orthogonal carriers with high order QAM constellations for the transmission of multiple bits per carrier and symbol, said system including digital receiver and transmitter units, said receiver unit including a symbol detection unit, characterised in that said system is adapted to determining a parameter for each single carrier, said parameter being indicative of a deviation of a received signal from a corresponding constellation point; comparing the parameter with an upper and lower limit; and, if the parameter is outside said limits, changing the constellation used to modulate the carrier to a neighbouring constellation. The symbol detection unit may be used to determine the parameter which may be a ratio d / sigma , where d is the shortest distance between neighbouring constellations, sigma is a standard deviation, and sigma is the variance of the deviations of the input and output signal values of said symbol detection unit.
Abstract translation: 本发明提供一种多载波传输系统，例如基于DMT的VDSL系统，使用具有高阶QAM星座的正交载波，用于每载波和符号传输多个比特，所述系统包括数字接收机和发射机单元，所述接收机单元 包括符号检测单元，其特征在于，所述系统适于确定每个单载波的参数，所述参数表示接收信号与相应星座点的偏差; 将参数与上限和下限进行比较; 并且如果参数在所述极限之外，则将用于将载波调制的星座改变为相邻星座。 符号检测单元可以用于确定可以是比率d 2 / sigma 2的参数，其中d是相邻星座之间的最短距离，σ是标准偏差，而σσ是方差 的所述符号检测单元的输入和输出信号值的偏差。
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Patent Agency Ranking
公开(公告)号：WO1998010552A2
公开(公告)日：1998-03-12
申请号：PCT/SE1997001457
申请日：1997-09-01
Applicant: TELIA AB , ISAKSSON, Mikael , JOHANSSON, Magnus , TONVALL, Harry , OLSSON, Lennart , STEFANSSON, Tomas , ÖHMAN, Hans , BAHLENBERG, Gunnar , ISAKSSON, Anders , ÖKVIST, Göran , LJUNGGREN, Lis-Marie , NORDSTRÖM, Tomas , ISAKSSON, Lars-Åke , BENGTSSON, Daniel , HÅKANSSON, Siwert , WEN, Ye
Inventor： TELIA AB
IPC: H04L05/06
CPC classification number: H04L25/03159 , H04L1/0065 , H04L1/0071 , H04L5/0007 , H04L5/0046 , H04L5/0048 , H04L5/006 , H04L5/0094 , H04L25/0228 , H04L2025/0349 , H04L2025/037 , H04L2025/03802
Abstract: The invention provides a multi-carrier transmission system, for example, a DMT system, in which channel information is transmitted between two transceivers using a plurality of sub-carriers, characterised in that each sub-carrier, or symbol, has a parameter associated therewith, and in that said transceivers are adapted to transmit said channel information as a sequence of n groups, in which each of said n groups contains information concerning the number of adjacent sub-carriers which have the same value as said parameter, together with the actual value of the parameter. The parameter which may have a plurality of discrete values, may be a bit-loading value, or a QAM constellation identifier.
Abstract translation: 本发明提供一种多载波传输系统，例如DMT系统，其中信道信息在使用多个子载波的两个收发器之间传输，其特征在于每个子载波或符号具有与其相关联的参数 并且所述收发机适于将所述信道信息作为n个组的序列发送，其中所述n个组中的每个组包含与所述参数具有相同值的相邻子载波的数量的信息，以及实际 参数值。 可以具有多个离散值的参数可以是位加载值或QAM星座标识符。
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公开(公告)号：WO1998010547A2
公开(公告)日：1998-03-12
申请号：PCT/SE1997001452
申请日：1997-09-01
Applicant: TELIA AB , ISAKSSON, Mikael , JOHANSSON, Magnus , TONVALL, Harry , OLSSON, Lennart , STEFANSSON, Tomas , ÖHMAN, Hans , BAHLENBERG, Gunnar , ISAKSSON, Anders , ÖKVIST, Göran , LJUNGGREN, Lis-Marie , NORDSTRÖM, Tomas , ISAKSSON, Lars-Åke , BENGTSSON, Daniel , HÅKANSSON, Siwert , WEN, Ye
Inventor： TELIA AB
IPC: H04L05/06
CPC classification number: H04L27/2675 , H04L27/2656 , H04L27/2657
Abstract: In a multi-carrier system, such as a DMT system, a receiver must be able to recover a sampling clock that is very accurately synchronized to a transmitter sampling clock. Typically, synchronization is achieved by using a reserved carrier, the pilot carrier, which is transmitted with a fixed phase. The receiver sampling clock is then phase locked to the pilot carrier. Frame timing can be recovered by using a correlation technique. The present invention provides an improved method of recovering a sample clock and phase locking the sampling clock to a pilot carrier.
Abstract translation: 在诸如DMT系统的多载波系统中，接收机必须能够恢复与发射机采样时钟非常精确同步的采样时钟。 通常，通过使用以固定相传输的保留载波，导频载波来实现同步。 接收机采样时钟然后被锁相到导频载波。 可以通过使用相关技术来恢复帧定时。 本发明提供一种恢复采样时钟并将采样时钟相位锁定到导频载波的改进方法。
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公开(公告)号：WO9929078A2
公开(公告)日：1999-06-10
申请号：PCT/SE9802193
申请日：1998-12-01
Applicant: TELIA AB , NORDSTROEM TOMAS , BAHLENBERG GUNNAR , BENGTSSON DANIEL , HAAKANSSON SIWERT , ISAKSSON ANDERS , ISAKSSON MIKAEL , JOHANSSON MAGNUS , LJUNGGREN LIS MARIE , LUNDBERG HANS , OLOFSSON SVEN RUNE , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , OEKVIST GOERAN
Inventor： NORDSTROEM TOMAS , BAHLENBERG GUNNAR , BENGTSSON DANIEL , HAAKANSSON SIWERT , ISAKSSON ANDERS , ISAKSSON MIKAEL , JOHANSSON MAGNUS , LJUNGGREN LIS-MARIE , LUNDBERG HANS , OLOFSSON SVEN-RUNE , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , OEKVIST GOERAN
CPC classification number: H04L27/2602 , H04L25/03866 , H04L27/2626 , H04L27/2647
Abstract: The present invention simplifies known data scramblers by making use of the synchronisation frames, normally used for measuring channel characteristics, as a source of pseudo-random data which can be combined with incoming user data. The present invention has particular application to multi-carrier transmission systems which employ DMT, or OFDM. Many of these transmission systems send known data, usually referred to as synchronisation frames, to measure channel characteristics such as signal to noise ratio. The known data contained in a synchronisation frame is selected to have a suitable statistical distribution, e.g. pseudo-random. In the data scrambler of the present invention, user data bits are combined with the known synchronisation frame data using an exclusive-OR function. This results in a statistically and computationally efficient scrambling of the user data.
Abstract translation: 本发明通过利用通常用于测量信道特性的同步帧作为可以与输入用户数据组合的伪随机数据源来简化已知数据加扰器。 本发明特别适用于采用DMT或OFDM的多载波传输系统。 这些传输系统中的许多传送已知数据（通常称为同步帧）以测量信道特性，例如信噪比。 包含在同步帧中的已知数据被选择为具有合适的统计分布，例如， 伪随机的。 在本发明的数据扰码器中，使用异或函数将用户数据比特与已知的同步帧数据组合。 这导致用户数据的统计和计算有效的加扰。
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公开(公告)号：WO9810556A2
公开(公告)日：1998-03-12
申请号：PCT/SE9701461
申请日：1997-09-01
Applicant: TELIA AB , ISAKSSON MIKAEL , JOHANSSON MAGNUS , TONVALL HARRY , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , BAHLENBERG GUNNAR , ISAKSSON ANDERS , OEKVIST GOERAN , LJUNGGREN LIS MARIE , NORDSTROEM TOMAS , ISAKSSON LARS AAKE , BENGTSSON DANIEL , HAAKANSSON SIWERT , WEN YE
Inventor： ISAKSSON MIKAEL , JOHANSSON MAGNUS , TONVALL HARRY , OLSSON LENNART , STEFANSSON TOMAS , OEHMAN HANS , BAHLENBERG GUNNAR , ISAKSSON ANDERS , OEKVIST GOERAN , LJUNGGREN LIS-MARIE , NORDSTROEM TOMAS , ISAKSSON LARS-AAKE , BENGTSSON DANIEL , HAAKANSSON SIWERT , WEN YE
CPC classification number: H04L5/006 , H04L5/0007 , H04L5/0037 , H04L5/0046
Abstract: The invention relates to a multi-carrier transmission system, particularly a DMT system, in which data is transmitted between two transceivers using a plurality of carriers, the frequency bandwidth of the system being divided between said plurality of carriers, the transmission system being adapted for operation in a heterogeneous network including a number of subscriber equipments having different channel characteristics and coexisting on the same cable, the length of cable for each subscriber terminal varying in dependence on their respective locations. In accordance with the invention the transmission system includes allocation means for allocating the traffic of subscriber equipments having a shorter length of cable to tones starting from a higher frequency band of said system bandwidth.
Abstract translation: 本发明涉及一种多载波传输系统，特别是DMT系统，其中使用多个载波在两个收发机之间传输数据，该系统的频率带宽在所述多个载波之间划分，该传输系统适于 在包括具有不同信道特性并且在同一电缆上共存的多个用户设备的异构网络中的操作，每个用户终端的电缆长度根据它们各自的位置而变化。 根据本发明，传输系统包括分配装置，用于将具有较短长度的电缆的用户设备的业务分配到从所述系统带宽的较高频带开始的音调。
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公开(公告)号：WO2008153468A1
公开(公告)日：2008-12-18
申请号：PCT/SE2008/000386
申请日：2008-06-11
Applicant: OPTOSKAND AB , ROOS, Sven-Olov , BENGTSSON, Daniel , BLOMSTER, Ola
Inventor： ROOS, Sven-Olov , BENGTSSON, Daniel , BLOMSTER, Ola
IPC: G02B6/42
CPC classification number: G02B6/4296
Abstract: The invention relates to a device for cooling optical components (5) based on optical fibers for transmitting high optical power, specifically power exceeding 10OW. The device comprises one or more cavities (2) with a flowing coolant, preferably water, to take care of such optical power loss. The device is characterised by a transmitting construction material (1) having a low heat expansion coefficient arranged in direct connection with the optical components (5) and arranged to transmit power loss radiation into the cavity (2) which is flushed with the flowing coolant. The transmitting construction material (1) is preferably made as a transparent tube and surrounded by a non-transparent tubular casing (3) having a good absorption capacity, preferably made of a metal, so that said cavity is formed between these two materials.
Abstract translation: 本发明涉及一种用于冷却基于用于传输高光功率的光纤的光学部件（5）的装置，特别是超过10OW的功率。 该装置包括具有流动的冷却剂（优选水）的一个或多个空腔（2），以照顾这种光功率损失。 该装置的特征在于具有与光学部件（5）直接连接布置的低热膨胀系数的传输结构材料（1），并且布置成将功率损耗辐射传输到用流动的冷却剂冲洗的空腔（2）中。 传输结构材料（1）优选制成透明管并且由具有良好吸收能力的非透明管状壳体（3）包围，优选地由金属制成，使得所述空腔形成在这两种材料之间。
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