公开(公告)号：US20100254031A1

公开(公告)日：2010-10-07

申请号：US12664505

申请日：2008-06-11

申请人： Sven-Olov Roos ,  Daniel Bengtsson ,  Ola Blomster

发明人： Sven-Olov Roos ,  Daniel Bengtsson ,  Ola Blomster

IPC分类号： G02B7/02 ,  G02B6/10

CPC分类号： G02B6/4296

摘要： A device for cooling optical components based on optical fibers for transmitting high optical power. The device includes one or more cavities with a flowing coolant to take care of optical power loss. The device includes a transmitting construction material having a low heat expansion coefficient arranged in direct connection with the optical components and arranged to transmit power loss radiation into the cavity which is flushed with the flowing coolant. The transmitting construction material is made as a transparent tube and surrounded by a tubular casing of a non-transparent material having a good absorption capacity so that the cavity is formed between the two materials.

摘要翻译： 一种用于冷却基于用于传输高光功率的光纤的光学部件的装置。 该装置包括具有流动冷却剂以照顾光功率损耗的一个或多个空腔。 该装置包括具有与光学部件直接连接的低热膨胀系数的传输结构材料，并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中。 传输结构材料制成透明管，并被具有良好吸收能力的不透明材料的管状外壳包围，从而在两种材料之间形成空腔。

公开(公告)号：US20060209976A1

公开(公告)日：2006-09-21

申请号：US11436014

申请日：2006-05-17

申请人： Magnus Johansson ,  Lennart Olsson ,  Gunnar Bahlenberg ,  Daniel Bengtsson ,  Mikael Isaksson ,  Sven-Rune Olofsson ,  Sven Okvist

发明人： Magnus Johansson ,  Lennart Olsson ,  Gunnar Bahlenberg ,  Daniel Bengtsson ,  Mikael Isaksson ,  Sven-Rune Olofsson ,  Sven Okvist

IPC分类号： H04K1/10 ,  H04B1/10

CPC分类号： H04L25/03159 ,  H04L27/2655 ,  H04L2025/03414 ,  H04L2025/03522 ,  H04L2025/03617

摘要： In a multi-carrier system employing OFDM, for example DMT, an adaptive channel equalizer is normally used, operating in the frequency domain. The sampling clock is controlled so that the time delay between the transmitter and the receiver is effectively eliminated. If the information used to control the sampling clock is received from the equalized data stream, it will introduce an ambiguity between the operation of the channel equalizer and the mechanism used to control the sampling clock. Operation of the equalizer can mask an increasing time difference, between transmitter and receiver, which the sample clock controller should be tracking. The present invention eliminates the ambiguities in the operation of the equalizer and sample clock controller by preventing the equalizer accepting time differences which should be corrected by operation of the sample clock controller.

公开(公告)号：US07079610B1

公开(公告)日：2006-07-18

申请号：US09700617

申请日：1999-05-11

申请人： Magnus Johansson ,  Lennart Olsson ,  Gunnar Bahlenberg ,  Daniel Bengtsson ,  Mikael Isaksson ,  Sven-Rune Olofsson ,  Sven-Göran Ökvist

发明人： Magnus Johansson ,  Lennart Olsson ,  Gunnar Bahlenberg ,  Daniel Bengtsson ,  Mikael Isaksson ,  Sven-Rune Olofsson ,  Sven-Göran Ökvist

IPC分类号： H04B1/10

CPC分类号： H04L25/03159 ,  H04L27/2655 ,  H04L2025/03414 ,  H04L2025/03522 ,  H04L2025/03617

摘要： In a multi-carrier system employing OFDM, for example DMT, an adaptive channel equalizer is normally used, operating in the frequency domain. The sampling clock is controlled so that the time delay between the transmitter and the receiver is effectively eliminated. If the information used to control the sampling clock is received from the equalized data stream, it will introduce an ambiguity between the operation of the channel equalizer and the mechanism used to control the sampling clock. Operation of the equalizer can mask an increasing time difference, between transmitter and receiver, which the sample clock controller should be tracking. The present invention eliminates the ambiguities in the operation of the equalizer and sample clock controller by preventing the equalizer from accepting time differences which should be corrected by operation of the sample clock controller.

摘要翻译： 在采用OFDM的多载波系统中，例如DMT，通常使用自适应信道均衡器，在频域中工作。 控制采样时钟，以便有效地消除发射机和接收机之间的时间延迟。 如果从均衡数据流接收到用于控制采样时钟的信息，则会在通道均衡器的操作和用于控制采样时钟的机制之间引入歧义。 均衡器的操作可以掩盖采样时钟控制器应该跟踪的发射机和接收机之间的增加的时间差。 本发明通过防止均衡器接受应该通过采样时钟控制器的操作来校正的时间差来消除均衡器和采样时钟控制器的操作中的模糊性。

公开(公告)号：US06987800B2

公开(公告)日：2006-01-17

申请号：US09737155

申请日：2000-12-14

申请人： Tomas Nordström ,  Daniel Bengtsson ,  Olivier Isson

发明人： Tomas Nordström ,  Daniel Bengtsson ,  Olivier Isson

IPC分类号： H04B1/38

CPC分类号： H04B3/32

摘要： The invention relates to a far-end crosstalk canceling circuit for a digital subscriber line transmission system, the transmission system including a plurality of line termination modems receiving discrete multitone symbols from corresponding network termination modems over a plurality of transmission channels. The invention estimates the modulated data actually transmitted by the network termination modems from the frequency components of the discrete multitone symbols received by the line termination modems and to evaluate the far-end crosstalk as a linear combination of these estimates. Far-end crosstalk cancellation for all the line termination modems is also provided in a centralized manner.

摘要翻译： 本发明涉及一种用于数字用户线传输系统的远端串扰消除电路，该传输系统包括多个线路终端调制解调器，其通过多个传输信道从相应的网络终端调制解调器接收离散多音符号。 本发明根据由终端调制解调器接收到的离散多音符号的频率分量来估计由网络终端调制解调器实际发送的调制数据，并且将远端串扰评价为这些估计的线性组合。 所有线路终端调制解调器的远端串扰消除也以集中的方式提供。

公开(公告)号：US06865232B1

公开(公告)日：2005-03-08

申请号：US09147750

申请日：1997-07-15

申请人： Mikael Isaksson ,  Magnus Johansson ,  Harry Tonvall ,  Lennart Olsson ,  Tomas Stefansson ,  Hans Ohman ,  Gunnar Bahlenberg ,  Anders Isaksson ,  Goran Okvist ,  Lis-Marie Ljunggren ,  Tomas Nordstrom ,  Lars-Ake Isaksson ,  Daniel Bengtsson ,  Siwert Hakansson ,  Ye Wen

发明人： Mikael Isaksson ,  Magnus Johansson ,  Harry Tonvall ,  Lennart Olsson ,  Tomas Stefansson ,  Hans Ohman ,  Gunnar Bahlenberg ,  Anders Isaksson ,  Goran Okvist ,  Lis-Marie Ljunggren ,  Tomas Nordstrom ,  Lars-Ake Isaksson ,  Daniel Bengtsson ,  Siwert Hakansson ,  Ye Wen

IPC分类号： H04L1/00 ,  H04L25/03 ,  H04L27/26 ,  H04L27/34 ,  H04K1/10 ,  H04L27/28

CPC分类号： 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

摘要： A multi-carrier transmission system has a plurality of transceivers, each having a receiver and a transmitter. Data is transmitted between the transceivers by modulating the data onto a multiplicity of carrier waves in the form of multi-bit symbols, wherein each carrier wave constitutes a channel, and wherein the number of bits per symbol (the bit loading), varies between channels and, within a channel, with time, so that each channel has associated therewith a bit loading parameter. In operation, the multi-carrier system is adapted to synchronously update, at the transceivers, the bit loading parameters associated with each channel by transmission of data over a control channel, in that the control channel is established, at system start-up, on a predetermined one of the multiplicity of carrier waves whose identity is known to the transceivers, and in that the control channel is, after start-up, changed from the predetermined channel to a further channel, selected by the first transceiver on the basis of channel characteristics.

摘要翻译： 多载波传输系统具有多个收发机，每个收发机具有接收机和发射机。 通过以多位符号的形式将数据调制到多个载波上，在收发器之间传输数据，其中每个载波构成一个信道，并且其中每个符号的比特数（比特加载）在信道之间变化 并且在频道内，随着时间，使得每个频道与其相关联地加载参数。 在操作中，多载波系统适于在收发机处通过控制信道上的数据传输来同步更新与每个信道相关联的比特加载参数，因为在系统启动时建立控制信道 多个载波的预定的一个载波，其身份对于收发机是已知的，并且控制信道在启动之后从预定信道改变到由第一收发信机基于信道选择的另一个信道 特点

公开(公告)号：US06751261B1

公开(公告)日：2004-06-15

申请号：US09147230

申请日：1999-02-09

申请人： Lennart Olsson ,  Gunnar Bahlenberg ,  Daniel Bengtsson ,  Siwert Håkansson ,  Anders Isaksson ,  Lars-Ake Isaksson ,  Mikael Isaksson ,  Magnus Johansson ,  Mauritz Lahti ,  Lis-Marie Ljunggren ,  Hans Lundberg ,  Tomas Nordstrom ,  Sven-Rune Olofsson ,  Tomas Stefansson ,  Hans Oman ,  Goran Okvist

发明人： Lennart Olsson ,  Gunnar Bahlenberg ,  Daniel Bengtsson ,  Siwert Håkansson ,  Anders Isaksson ,  Lars-Ake Isaksson ,  Mikael Isaksson ,  Magnus Johansson ,  Mauritz Lahti ,  Lis-Marie Ljunggren ,  Hans Lundberg ,  Tomas Nordstrom ,  Sven-Rune Olofsson ,  Tomas Stefansson ,  Hans Oman ,  Goran Okvist

IPC分类号： H04L506

CPC分类号： H04L27/2662 ,  H04L27/2657 ,  H04L27/2672 ,  H04L27/2678

摘要： With OFDM systems the frequency domain data is the Fourier transform of the received time domain OFDM frames. The time domain frames must be sampled, at the receiver, in synchronism with the transmitter, so that each received frame contains data from only a single transmitted frame. It is vital for this synchronism to be maintained in order to maintain the orthogonality of the frames. A typical multi-carrier system, of the OFDM type, which uses a cyclic prefix permits orthogonality to be maintained when there is a small deviation from exact frame synchronisation. Because the signalling interval includes both an entire frame and the cyclic prefix, which is a repetition of part of the frame, a frame sampled within the signalling interval will contain data from only one frame. Since the signalling interval is greater than the frame period, this gives some leeway in frame alignment. In a multi-carrier system of the OFDM type, an adaptive channel equalizer, operating in the frequency domain, is often used. The internal parameters in such an equalizer contain, in addition to information about the characteristics of the channel, information which can be interpreted as the time deviation between the sampling clocks of the transmitter and the receiver. The present invention utilizes this information to control the sampling clock of the receiver in a more robust way than has previously been possible with known techniques. The present invention is particularly suitable for use in ADSL and VDSL modems which can be used to give broadband access over copper networks. The invention is also of relevance to broadband transmission in mobile and semi-mobile systems for transmission over the radio channels.

摘要翻译： 对于OFDM系统，频域数据是接收的时域OFDM帧的傅里叶变换。 必须在接收机处与发射机同步地采样时域帧，使得每个接收的帧包含来自仅一个发射帧的数据。 为了保持帧的正交性，保持该同步是至关重要的。 使用循环前缀的OFDM类型的典型多载波系统当与精确帧同步的偏差很小时，允许维持正交性。 由于信令间隔包括作为帧的一部分的重复的整个帧和循环前缀，所以在信令间隔内采样的帧将仅包含来自一个帧的数据。 由于信令间隔大于帧周期，所以在帧对齐中给出了一些余地。 在OFDM类型的多载波系统中，经常使用在频域中工作的自适应信道均衡器。 除了关于信道特性的信息之外，这种均衡器中的内部参数还包含可被解释为发射机和接收机的采样时钟之间的时间偏差的信息。 本发明利用该信息以比先前已知技术可能的更可靠的方式来控制接收机的采样时钟。 本发明特别适用于ADSL和VDSL调制解调器，可用于通过铜网络提供宽带接入。 本发明还涉及用于在无线电信道上传输的移动和半移动系统中的宽带传输。

公开(公告)号：US06738440B1

公开(公告)日：2004-05-18

申请号：US09530947

申请日：2000-12-27

申请人： Mikael Isaksson ,  Magnus Johansson ,  Lennart Olsson ,  Tomas Stefansson ,  Hans Ohman ,  Gunnar Bahlenberg ,  Anders Isaksson ,  Goran Okvist ,  Lis-Marie Ljunggren ,  Daniel Bengtsson ,  Sven-Rune Olofsson ,  Joachim Johansson ,  Per Ola Borjesson ,  Niklas Grip ,  Richard Nilsson ,  Frank Sjoberg ,  Sarah Wilson ,  Per Odling

发明人： Mikael Isaksson ,  Magnus Johansson ,  Lennart Olsson ,  Tomas Stefansson ,  Hans Ohman ,  Gunnar Bahlenberg ,  Anders Isaksson ,  Goran Okvist ,  Lis-Marie Ljunggren ,  Daniel Bengtsson ,  Sven-Rune Olofsson ,  Joachim Johansson ,  Per Ola Borjesson ,  Niklas Grip ,  Richard Nilsson ,  Frank Sjoberg ,  Sarah Wilson ,  Per Odling

IPC分类号： H04B1500

CPC分类号： H04L25/10 ,  H04B1/123 ,  H04L27/2647

摘要： A RFI canceller, for use in a subscriber line system using multi-carrier modulation, measures a RFI disturbance in carriers falling within a band of frequencies causing the RFI. The RFI ingress into carriers outside the band of frequencies is estimated, and an error correcting signal derived from the estimation of the RFI ingress is subtracted from a received signal. The subscriber line system may be a VDSL system and the multi-carrier modulation may be DMT. The RFI canceller includes a demodulator for demodulating an incoming data stream to provide a first parallel data stream. A parallel to serial convertor converts the first parallel data stream to a first serial data stream. A digital to analogue convertor converts the first serial data stream to a first analogue signal. An analogue RFI canceller circuit combines the analogue signal with an analogue error correcting signal, to produce a second analogue signal. An analogue to digital convertor converts the second analogue signal to a second serial data signal. A serial to parallel convertor converts the second serial data stream to a second parallel data stream. A modulator modulates the second parallel data stream onto a multiplicity of carriers.

摘要翻译： 用于在使用多载波调制的用户线路系统中的RFI消除器测量导致RFI的频率带内的载波中的RFI干扰。 估计RFI进入频带外的载波，并从接收到的信号中减去从估计RFI进入导出的纠错信号。 用户线路系统可以是VDSL系统，并且多载波调制可以是DMT。 RFI消除器包括用于解调输入数据流以提供第一并行数据流的解调器。 并行到串行转换器将第一并行数据流转换为第一串行数据流。 数模转换器将第一串行数据流转换为第一模拟信号。 模拟RFI消除器电路将模拟信号与模拟纠错信号相结合，产生第二个模拟信号。 模数转换器将第二模拟信号转换成第二串行数据信号。 串行到并行转换器将第二串行数据流转换为第二并行数据流。 调制器将第二并行数据流调制到多个载波上。

公开(公告)号：US06538986B2

公开(公告)日：2003-03-25

申请号：US09147745

申请日：1999-06-01

申请人： Mikael Isaksson ,  Magnus Johansson ,  Harry Tonvall ,  Lennart Olsson ,  Tomas Stefansson ,  Hans Ohman ,  Gunnar Bahlenberg ,  Anders Isaksson ,  Goran Okvist ,  Lis-Marie Ljunggren ,  Tomas Nordstrom ,  Lars-Ake Isaksson ,  Daniel Bengtsson ,  Siwert Hakansson ,  Ye Wen

发明人： Mikael Isaksson ,  Magnus Johansson ,  Harry Tonvall ,  Lennart Olsson ,  Tomas Stefansson ,  Hans Ohman ,  Gunnar Bahlenberg ,  Anders Isaksson ,  Goran Okvist ,  Lis-Marie Ljunggren ,  Tomas Nordstrom ,  Lars-Ake Isaksson ,  Daniel Bengtsson ,  Siwert Hakansson ,  Ye Wen

IPC分类号： H04J1100

CPC分类号： H04L5/006 ,  H04L1/0065 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0046 ,  H04L27/3461

摘要： A transmission system using nQAM. A control channel is superimposed on a nQAM data channel. It is desirable to separate control channel data from user data without using a higher level protocol layer. 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. that is the bit-loading, or constellation identifier are unknown. Binary data is transmitted using nQAM modulation. The binary data includes 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 the control data is facilitated by arranging control data points to have either a unique phase or unique amplitude values. These unique values are not employed for user data points.

摘要翻译： 使用nQAM的传输系统。 控制信道叠加在nQAM数据信道上。 期望将控制信道数据与用户数据分离，而不使用较高级别的协议层。 在具有可变位加载的多载波系统中，特别希望的是，当n的值时，控制信道数据可以与用户数据分离。 这是位加载，或星座标识符是未知的。 使用nQAM调制传输二进制数据。 二进制数据包括用户数据和控制数据。 这意味着控制信道叠加在相同nQAM星座内的用户数据信道上。 通过将控制数据点布置为具有唯一的相位或唯一的振幅值，便于控制数据的分离。 这些唯一值不用于用户数据点。

公开(公告)号：US06466629B1

公开(公告)日：2002-10-15

申请号：US09147756

申请日：1999-05-28

申请人： Mikael Isaksson ,  Magnus Johansson ,  Harry Tonvall ,  Lennart Olsson ,  Tomas Stefansson ,  Hans Ohman ,  Gunnar Bahlenberg ,  Anders Isaksson ,  Goran Okvist ,  Lis-Marie Ljunggren ,  Tomas Nordstrom ,  Lars-Ake Isaksson ,  Daniel Bengtsson ,  Siwert Hakansson ,  Ye Wen

发明人： Mikael Isaksson ,  Magnus Johansson ,  Harry Tonvall ,  Lennart Olsson ,  Tomas Stefansson ,  Hans Ohman ,  Gunnar Bahlenberg ,  Anders Isaksson ,  Goran Okvist ,  Lis-Marie Ljunggren ,  Tomas Nordstrom ,  Lars-Ake Isaksson ,  Daniel Bengtsson ,  Siwert Hakansson ,  Ye Wen

IPC分类号： H03K900

CPC分类号： H04L27/2647

摘要： A multi-carrier transmission system. A received multi-carrier signal is sampled and digitized before FFT 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, analog to digital converters have a limited dynamic range. It is therefore normal practice to provide a compromise between cutting and quantization noise. The adverse affects of a course quantization have to be balanced between signal distortions caused by the loss of the low probability high amplitude signals.

摘要翻译： 多载波传输系统。 接收的多载波信号在FFT处理之前进行采样和数字化。 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，模数转换器具有有限的动态范围。 因此，通常的做法是在切割和量化噪声之间提供妥协。 课程量化的不利影响必须在由低概率高幅度信号的损失引起的信号失真之间进行平衡。

公开(公告)号：US09866787B2

公开(公告)日：2018-01-09

申请号：US13524925

申请日：2012-06-15

申请人： John Rehn ,  Joachim Ståhl ,  Sebastian Hultqvist ,  Daniel Bengtsson

发明人： John Rehn ,  Joachim Ståhl ,  Sebastian Hultqvist ,  Daniel Bengtsson

IPC分类号： H04N7/18 ,  H04N5/77 ,  H04N5/765

CPC分类号： H04N5/772 ,  H04N5/765 ,  H04N7/181

摘要： A method for configuring a plurality of networked cameras includes sending a request to the plurality of networked cameras requesting information relating to enabled storage type of each networked camera, receiving a response from networked cameras. The response includes information relating to storage type enabled in networked camera. The method further includes determining storage type to use for each networked camera that are enabled to autonomously store images at a storage means, where the determining of storage type is performed based on the information relating to enabled storage types received from these networked cameras, and sending a storage instruction to each camera for which a storage type has been determined. The storage instruction instructs a camera to store captured images on a storage means of a specific type.