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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：WO9810552A3
公开(公告)日：1998-05-22
申请号：PCT/SE9701457
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 , 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. 00000
Abstract translation: 本发明提供一种多载波传输系统，例如DMT系统，其中使用多个子载波在两个收发机之间传输信道信息，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。 00000
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公开(公告)号：WO1998010551A2
公开(公告)日：1998-03-12
申请号：PCT/SE1997001456
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 , ÖDLING, Per
Inventor： TELIA AB
IPC: H04L05/06
CPC classification number: H04L5/0046 , H04L1/0065 , H04L1/0071 , H04L5/0007 , H04L5/006
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 modulated with symbols, each of which represents a multiplicity of bits, each of said transceivers including a receiver and a transmitter, in which a fixed maximum value is determined for the number of bits for each symbol, and in which the system is adapted to determine the bit capacity per symbol of each of said plurality of sub-carriers, and to increase the number of bits represented by a symbol, transmitted over those sub-carriers having a capacity less than the fixed maximum value, to said maximum value by the addition of channel coding bits. The fixed maximum value for the number of bits for each symbol may be determined on the basis of the bit capacity of that one of the sub-carriers having the highest theoretical bit capacity and may be at least as large as said theoretical bit capacity.
Abstract translation: 本发明提供了一种多载波传输系统，例如DMT系统，其中信道信息在两个收发器之间使用多个子载波进行传输，所述多个子载波用码元调制，每个子载波表示多个比特，每个收发器 包括接收机和发射机，其中确定每个符号的比特数的固定最大值，并且其中系统适于确定每个所述多个子载波中每个的每个符号的比特容量，并且其中 通过添加信道编码比，将通过具有小于固定最大值的容量的那些子载波发送的符号所表示的比特数增加到所述最大值。 可以基于具有最高理论比特容量的一个子载波的比特容量来确定每个符号的比特数的固定最大值，并且可以至少与所述理论比特容量一样大。
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公开(公告)号：WO1998010550A2
公开(公告)日：1998-03-12
申请号：PCT/SE1997001455
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: H04L27/2647
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.
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。
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Patent Agency Ranking
公开(公告)号：WO1998010548A2
公开(公告)日：1998-03-12
申请号：PCT/SE1997001453
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: H04L27/2657 , H04L27/2656 , H04L27/2675
Abstract: Modern multi-carrier transmission systems, using orthogonal carriers with high order QAM constellations for the transmission of multiple bits per carrier and symbol, place high demands on the synchronisation of the receiver with the transmitter. The maximum permitted deviation from exact synchronisation is usually a small fraction of a sampling interval. A reserved carrier, the pilot carrier, which is given a fixed phase, is usually used as the reference to achieve this high accuracy. The receiver sampling clock oscillator is phase-locked to the pilot carrier. It is, therefore, necessary to estimate the phase of the pilot carrier. Using a bandpass filter to recover the pilot carrier, regardless of the frame structure of the DMT signal, does not eliminate the influence of neighbouring carriers on the pilot carrier.
Abstract translation: 现代多载波传输系统使用具有高阶QAM星座的正交载波，用于每载波和符号传输多个比特，对接收机与发射机的同步提出了很高的要求。 精确同步的最大允许偏差通常是采样间隔的一小部分。 通常使用被赋予固定相位的导频载波的保留载波作为参考，以实现这种高精度。 接收机采样时钟振荡器与导频载波锁相。 因此，需要估计导频载波的相位。 使用带通滤波器来恢复导频载波，无论DMT信号的帧结构如何，都不会消除相邻载波对导频载波的影响。
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公开(公告)号：WO1998010545A1
公开(公告)日：1998-03-12
申请号：PCT/SE1997001277
申请日：1997-07-15
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: H04L1/0025 , H04L1/0059 , H04L1/0071 , H04L5/0007 , H04L5/0046 , H04L5/006 , H04L25/03159 , H04L27/2656 , H04L27/2657 , H04L27/2662 , H04L27/3461 , H04L2025/03414 , H04L2025/03522
Abstract: In a multi-carrier system there is always a need to exchange control information between a transmitter and a receiver. This information is generated in the receiver and terminated in the transmitter. This information contains data on the instantaneous characteistics of the channel and information about system change decisions needed to handle the changes in channel characteristics. In systems that use bit-loading techniques the number of transmitted bits per symbol is adapted, or regulated, to the signal-to-noise ratio (SNR) of the current carrier wave. This regulation dynamically affects, in time, the total bandwith of the system. This variation in bandwidth leads to an absolute system requirement for synchronous configuration of the transmitter and the receiver, in terms of the number of coded/decoded bits per symbol and carrier wave. If this requirement is not met the system will be unable to maintain a connection.
Abstract translation: 在多载波系统中，始终需要在发射机和接收机之间交换控制信息。 该信息在接收机中生成并终止于发射机。 该信息包含有关信道瞬时特征的数据以及处理信道特征变化所需的系统变更决策信息。 在使用比特加载技术的系统中，每个符号的发送比特数被适配或调整为当前载波的信噪比（SNR）。 该规则在时间上动态地影响系统的总带宽。 带宽的这种变化导致发送器和接收器的同步配置的绝对系统要求，就每个符号和载波的编码/解码比特数而言。 如果不满足此要求，系统将无法维护连接。
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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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9.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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10.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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