Telecommunications transmission systems
    61.
    发明授权
    Telecommunications transmission systems 有权
    电信传输系统

    公开(公告)号:US07079610B1

    公开(公告)日:2006-07-18

    申请号:US09700617

    申请日:1999-05-11

    IPC分类号: H04B1/10

    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。

    Conveyor belt
    62.
    发明申请
    Conveyor belt 有权
    输送带

    公开(公告)号:US20060131139A1

    公开(公告)日:2006-06-22

    申请号:US10520670

    申请日:2003-06-25

    IPC分类号: B65G17/42

    摘要: An endless conveyor belt for an air conditioning plant, in which the conveyor belt extends helically along part of its length, comprising transverse rods (4) and lateral elements (3). The conveyor belt is characterised in that the lateral elements (3) are connected in pairs to only two rods (4), which are fixedly connected to said lateral elements (3) and form, with these, a link means (2), and adjoining link means (2) are articulated to each other by a coupling element (5) arranged therebetween and connected to neighbouring rods (4) of the adjoining link means (2).

    摘要翻译: 用于空调设备的环形输送带,其中输送带沿其长度的一部分螺旋地延伸,包括横向杆(4)和横向元件(3)。 传送带的特征在于,侧向元件(3)成对连接成仅两个杆(4),其固定地连接到所述横向元件(3)并与其形成连杆装置(2),并且 相邻的连接装置(2)通过布置在其间的连接元件(5)彼此铰接,并连接到相邻连杆装置(2)的相邻杆(4)。

    Device for transferring a pattern to an object
    63.
    发明申请
    Device for transferring a pattern to an object 有权
    用于将模式传输到对象的设备

    公开(公告)号:US20060006580A1

    公开(公告)日:2006-01-12

    申请号:US10525034

    申请日:2003-07-31

    IPC分类号: B28B11/08 B29C59/00

    摘要: A device (4) for transferring a pattern to an object (2). The invention relates especially to production of micro and nanostructures. The device comprises an alignment means (10) arranged in connection with a first contacting means (7) for controlling the motion of the first stamp (8) in a direction perpendicular to the pressing direction (A), and a second contacting means (11) having a second stamp (12) adapted to imprint a second pattern in the second surface (6) of the object (2), and a pressing means (9) further adapted to press the second stamp (12) into contact with the second surface (6) of the object (2) in the pressing direction (A). Hereby is obtained a device of a simple design, which has a high accuracy of the alignment of the stamps in relation to the object.

    摘要翻译: 一种用于将图案转印到物体(2)的装置(4)。 本发明特别涉及微结构和纳米结构的生产。 该装置包括与第一接触装置(7)连接的对准装置(10),用于在垂直于按压方向(A)的方向上控制第一印模(8)的运动;以及第二接触装置 )具有适于将第二图案压印在所述物体(2)的所述第二表面(6)中的第二印模(12)和进一步适于将所述第二印模(12)按压到所述第二印模 物体(2)的按压方向(A)的表面(6)。 由此获得了简单设计的装置,其具有相对于物体的邮票的对准的高精度。

    Synchronisation
    65.
    发明授权
    Synchronisation 有权
    同步

    公开(公告)号:US06751261B1

    公开(公告)日:2004-06-15

    申请号:US09147230

    申请日:1999-02-09

    IPC分类号: H04L506

    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。

    Method and apparatus for etching
    69.
    发明授权
    Method and apparatus for etching 失效
    蚀刻方法和设备

    公开(公告)号:US06423207B1

    公开(公告)日:2002-07-23

    申请号:US09653945

    申请日:2000-09-01

    IPC分类号: C25F300

    CPC分类号: C25F3/14 H05K3/07

    摘要: A method of making, by etching, depressions in selected portions of an etching surface of an electrically conductive etching material, the depressions forming an etching pattern, comprises the step of contacting the etching material with an etchant. A passivating layer is formed on the etching material which layer decreases or stops the etching capability of the etchant on the surface and which is dissolved in a chemical reaction when exposed to electromagnetic radiation. An electrode with electrically conductive electrode portions in selected portions of an electrode surface is provided, the electrode portions forming an electrode pattern corresponding to the etching pattern. The electrode is arranged in contact with the etchant and with the electrode portions facing the etching surface of the etching material, an electric voltage is applied between the electrode and the etching material, and the etching material is exposed to electromagnetic radiation essentially perpendicular to the etching surface.

    摘要翻译: 通过蚀刻导电蚀刻材料的蚀刻表面的选定部分中的凹陷,形成蚀刻图案的凹陷的方法包括使蚀刻材料与蚀刻剂接触的步骤。 在蚀刻材料上形成钝化层,该层在暴露于电磁辐射时降低或停止表面上蚀刻剂的蚀刻能力并溶解在化学反应中。 提供了在电极表面的选定部分中具有导电电极部分的电极,电极部分形成对应于蚀刻图案的电极图案。 电极与蚀刻剂接触并且电极部分面向蚀刻材料的蚀刻表面,在电极和蚀刻材料之间施加电压,并且蚀刻材料暴露于基本垂直于蚀刻的电磁辐射 表面。