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    • 12. 发明授权
    • Link quality determination of a transmission link in an OFDM transmission system
    • OFDM传输系统中传输链路的链路质量确定
    • US07187646B2
    • 2007-03-06
    • US09910732
    • 2001-07-24
    • Peter Schramm
    • Peter Schramm
    • H04J11/00
    • H04L27/2647H04L1/0003H04L1/0009H04L1/20H04L1/208H04L25/0204
    • The present invention relates to a link quality determination unit (LQ-DET) for determining a link quality (LQ) of a transmission link (TL) between an OFDM transmitter (TR) and an OFDM receiver (RC) of an OFDM transmission system (SYS). A first link quality measure determination unit (Q1-DET) determines a first link quality measure (Q1) on the basis of a signal power variation or a signal-to-noise variation determined by a variation determination unit (VS-DET). A second link quality determination unit (Q2-DET) calculates a second link quality measure (Q2) on the basis of an average signal-to-noise ratio based on the noise power (Pz) and the signal power (Ps). To perform a link adaptation (LA) an overall link quality determination unit (Q-DET) combines the first and second link quality measures (Q1, Q2) into an overall link quality measure (Q).
    • 本发明涉及一种用于确定OFDM发射机(TR)和OFDM传输系统的OFDM接收机(RC)之间的传输链路(TL)的链路质量(LQ)的链路质量确定单元(LQ-DET) SYS)。 第一链路质量测量确定单元(Q 1 -DET)基于由变化确定的信号功率变化或信噪比变化来确定第一链路质量测量(Q 1-SUB) 确定单元(VS-DET)。 第二链路质量确定单元(Q 2 -DET)基于噪声功率的平均信噪比来计算第二链路质量测量(Q 2-SUB)(P z )和信号功率(P SUB)。 为了执行链路自适应(LA),整个链路质量确定单元(Q-DET)将第一和第二链路质量测量(Q 1> 1,Q 2> 2)组合成 整体链路质量测度(Q)。
    • 15. 发明授权
    • Efficient system and method for forward error correction
    • 高效的前向纠错系统和方法
    • US06553540B1
    • 2003-04-22
    • US09397512
    • 1999-09-17
    • Peter SchrammUdo Wachsmann
    • Peter SchrammUdo Wachsmann
    • H03M1303
    • H04L1/0059H04L27/2602
    • In wireless telecommunications systems, such as wireless local area networks, a flexible, less complex, and bandwidth efficient forward error correction method can be achieved by applying a first convolutional coding scheme to the bits in a first portion of a data block and a second convolutional coding scheme to the bits in a second portion of the data block, wherein the second portion of the data block may encompass a remaining portion of the data block, excluding the first portion, or the entire data block, including the first portion. While the first coding scheme employs a first code rate, the second coding scheme employs a second code rate that is higher than the first code rate. The higher rate makes it possible to incorporate the one or more tail bits into the second portion of the data block, and therefore, avoid generating any additional symbols, such as orthogonal frequency division multiplexing symbols, to exclusively modulate the tail bits.
    • 在诸如无线局域网的无线电信系统中,可以通过对数据块的第一部分中的比特应用第一卷积编码方案和第二卷积编码方案来实现灵活的,较不复杂的和带宽有效的前向纠错方法 编码方案到数据块的第二部分中的位,其中数据块的第二部分可以包括数据块的剩余部分,不包括第一部分或包括第一部分的整个数据块。 虽然第一编码方案采用第一码率,但是第二编码方案采用比第一码率高的第二码率。 较高的速率使得可以将一个或多个尾比特并入数据块的第二部分,因此避免产生任何附加符号,例如正交频分复用符号,以专门调制尾比特。
    • 18. 发明授权
    • Apparatus for determining and evaluating color measurement strips on a
printed sheet
    • 用于确定和评估印刷纸上的测色条的装置
    • US4648048A
    • 1987-03-03
    • US574875
    • 1984-01-30
    • Alfred DornPeter SchrammSiegfried SchuhmannOded Zingher
    • Alfred DornPeter SchrammSiegfried SchuhmannOded Zingher
    • G01B11/00B41F31/02B41F33/00G01B11/03G01B21/00G01N21/17G01N21/47G01B11/14
    • B41F33/0036
    • An apparatus to obtain ink density data by scanning color measurement strips on a printed sheet has a densitometer mounted on a digitally-driven X,Y positioning mechanism, an optical sensor for detecting the position and orientation of the sheet with respect to the X,Y positioning mechanism, and a numerical computer for transforming the sheet coordinates of the color measurement strips to the X,Y coordinates of the X,Y positioning mechanism. Thus, the numerical computer can automatically position the densitometer to scan the color measurement strips. In a first embodiment, optical sensor arrays determine the position and orientation of the test sheet with respect to the X,Y positioning mechanism. In a second embodiment, the densitometer itself scans the edge portions of the test sheet to determine the position and orientation of the test sheet. The operator has the option of using sheet coordinates of the color measurement strips obtained from non-volatile storage, from a recording medium such as magnetic tape or disk, from direct operator entry from a keyboard, or from the sighting of the measurement strips on the test sheet arbitrarily positioned and oriented with respect to the X,Y positioning mechanism.
    • 通过在印刷纸上扫描彩色测量条来获得油墨密度数据的装置具有安装在数字驱动的X,Y定位机构上的密度计,用于检测纸张相对于X,Y的位置和取向的光学传感器 定位机构,以及用于将彩色测量条的纸张坐标转换为X,Y定位机构的X,Y坐标的数字计算机。 因此,数字计算机可以自动定位密度计来扫描彩色测量条。 在第一实施例中,光学传感器阵列确定测试片相对于X,Y定位机构的位置和取向。 在第二实施例中,密度计本身扫描测试片的边缘部分以确定测试片的位置和取向。 操作者可以选择使用从非易失性存储器获得的彩色测量条的片材坐标,从诸如磁带或磁盘的记录介质,从键盘的直接操作者输入,或者从测量条上观察到的 测试片相对于X,Y定位机构任意定位和取向。
    • 20. 发明授权
    • Receiving element
    • 接收元素
    • US07553117B2
    • 2009-06-30
    • US11196810
    • 2004-01-28
    • Peter Schramm
    • Peter Schramm
    • F16B15/00
    • F16B21/12F16B19/02Y10S411/954Y10T403/1616
    • The invention relates to a receiving element comprising a bolt with an external surface that is essentially parallel to and in particular coaxial with a longitudinal axis. Said bolt can be introduced into a bore of at least one component, preferably at least two components in order to fix and/or align said component(s) for subsequent machining. The aim of the invention is to develop the receiving element whilst maintaining a simple construction in order to ensure a high dimensional stability and positioning precision over a long service life. To achieve this, the bolt comprises at least two recesses containing orifices in the vicinity of its external surface, said recesses containing pins, which consist of or comprise wear-resistant sintered material, extend through said orifices in a partial radial manner and project beyond the external surface with a predefined overhang.
    • 本发明涉及一种接收元件,其包括具有基本上平行于且特别是与纵向轴线同轴的外表面的螺栓。 所述螺栓可以被引入到至少一个部件的孔中,优选地至少两个部件,以便固定和/或对准所述部件用于随后的加工。 本发明的目的是开发接收元件,同时保持简单的结构,以便在长的使用寿命内确保高的尺寸稳定性和定位精度。 为了实现这一点,螺栓包括在其外表面附近包含孔的至少两个凹部,所述凹部包含销,其由耐磨烧结材料构成或包括耐磨烧结材料,以部分径向方式延伸穿过所述孔并突出超过 外表面具有预定的突出端。