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17 条记录 (耗时 0.018 秒)

    Adapter frequency range equalizer for digital radio relay systems
    1.
    发明授权
    Adapter frequency range equalizer for digital radio relay systems 失效
    适用于数字无线电中继系统的频率范围均衡器

    公开(公告)号：US4800572A

    公开(公告)日：1989-01-24

    申请号：US91020

    申请日：1987-08-31

    申请人： Josef A. Nossek ,  Georg Sebald ,  Berthold Lankl ,  Klaus Boshold

    发明人： Josef A. Nossek ,  Georg Sebald ,  Berthold Lankl ,  Klaus Boshold

    IPC分类号： H03H21/00 ,  H04B3/04 ,  H04B7/005 ,  H04L27/00 ,  H04L27/01

    CPC分类号： H04L27/01

    摘要： An adaptive frequency range equalizer for digital radio relay systems which require adaptive frequency range equalizers which have coefficients that are adjustable. That are different possibilities for setting the coefficients of the transversal filter in such equalizers in a manner such that the transmission function of the transversal filter is either of the minimum phase type (mp), or the linear phase type (lp) or the non-minimum phase type (mnp). The invention discloses a method and apparatus for obtaining either of the three transmission functions for the transversal filter.

    摘要翻译： 一种用于数字无线电中继系统的自适应频率范围均衡器，其需要具有可调节系数的自适应频率范围均衡器。 这是以这样的方式设置这种均衡器中的横向滤波器的系数的不同可能性，使得横向滤波器的传输函数是最小相位类型（mp）或线性相位类型（lp）或非线性相位类型 最小相位类型（mnp）。 本发明公开了一种用于获得横向滤波器的三种传输功能之一的方法和装置。

    Adaptive transverse equalizer
    2.
    发明授权
    Adaptive transverse equalizer 失效
    自适应横向均衡器

    公开(公告)号：US4745623A

    公开(公告)日：1988-05-17

    申请号：US911675

    申请日：1986-09-25

    申请人： Georg Sebald ,  Berthold Lankl ,  Josef A. Nossek

    发明人： Georg Sebald ,  Berthold Lankl ,  Josef A. Nossek

    IPC分类号： H03H15/00 ,  H04B3/06 ,  H04L25/03 ,  H03H7/30 ,  H03K5/159

    CPC分类号： H04L25/03057 ,  H04L2025/0342 ,  H04L2025/0349 ,  H04L2025/03515 ,  H04L2025/03624

    摘要： An adaptive transverse equalizer formed of delay elements, control elements and summers, and which is constructed in accordance with a serial-in/parallel-out or parallel-in/serial-out concept. Such an equalizer should be improved such that, given a simple structure, it exhibits a high equalizing performance and is particularly suitable for multi-stage digital radio link systems. For this purpose, an equalizer is provided as a linear transverse equalizer and having (n-1) positive and m negative coefficients set in accordance with a zero-forcing algorithm. A linear transverse filter is provided which supplies at least one additional, positive coefficient following upon an access region of the linear transverse filter and whose loop transit time corresponds to n-times or (n+i) times a symbol period.

    摘要翻译： 由延迟元件，控制元件和加法器构成的自适应横向均衡器，其根据串联/并行输出或并行/串联结构构造。 应该改进这种均衡器，使得由于简单的结构，它具有高均衡性能，特别适用于多级数字无线电链路系统。 为此，提供均衡器作为线性横向均衡器并具有根据强迫算法设置的（n-1）正和m个负系数。 提供线性横向滤波器，其提供至少一个额外的正系数，跟随在线性横向滤波器的访问区域上，并且其循环传播时间对应于符号周期的n倍或（n + i）倍。

    Adaptive depolarization-interference-compensator
    6.
    发明授权
    Adaptive depolarization-interference-compensator 失效
    自适应去极化 - 干涉补偿器

    公开(公告)号：US4757319A

    公开(公告)日：1988-07-12

    申请号：US45476

    申请日：1987-05-04

    申请人： Berthold Lankl

    发明人： Berthold Lankl

    IPC分类号： H04B7/00 ,  G01S3/16 ,  H01Q21/06 ,  H04B1/10

    CPC分类号： H04B7/002

    摘要： An adaptive depolarization-interference-compensator for a digital radio relay system using multi-level quadrature amplitude modulation (QAM) with co-channel operation of the orthogonally polarized signals which is not necessarily synchronous with the clock frequency and/or carrier frequency and produces good compensation of depolarization effects.The receiving branch of the two receivers (3, 4), which use the same RF-local oscillator (5) or separate RF-local oscillators are synchronized for the differently polarized signals and each contain a quadrature demodulator (8, 14) for two signal components (I- and Q-channel). A canceller is provided which consists of two quadrature demodulators (20, 23) for the two polarization directions, which are each supplied at with an IF-received signal of one polarization and the IF-carrier (9, 15) of the respective other polarization, and which consist of complex transversal filters (21, 22, 24, 25) (I- and Q-channel) in the signal paths to the two quadrature demodulators (20, 23). The transversal filters (21, 22, 24, 25) have their outputs coupled into the receiving branch of the respective other polarization. The delay time .tau..sub.0 between the tappings of the transversal filters corresponds at the maximum to half the reciprocal value of the frequency of the highest spectral component of the base-band signal with a rational ratio m/n which preferably supplies a delay time which is shorter than or equal to .tau..sub.0 (m/n=ratio of the symbol period of the interference signal to the transit time between the tappings of the transversal filter; m, n whole numbers).

    摘要翻译： 一种使用多电平正交幅度调制（QAM）的数字无线电中继系统的自适应去极化 - 干扰补偿器，其具有与时钟频率和/或载波频率不同步的正交极化信号的同信道操作，并产生良好的 补偿去极化效应。 使用相同的RF本地振荡器（5）或分离的RF本地振荡器的两个接收机（3,4）的接收分支被同步用于不同极化的信号，并且每个包含用于两个的正交解调器（8,14） 信号分量（I-和Q-通道）。 提供了一种消除器，其由用于两个偏振方向的两个正交解调器（20,23）组成，它们分别以一个极化的IF接收信号和相应的其它极化的IF载波（9,15）提供 并且在到两个正交解调器（20,23）的信号路径中由复杂横向滤波器（21,22,24,25）（I和Q信道）组成。 横向滤波器（21,22,24,25）的输出耦合到相应的其它极化的接收支路中。 横向滤波器的触发之间的延迟时间τ0相当于基带信号的最高频谱分量的频率的倒数的最大值的一半，其中有理比m / n优选地提供延迟时间， 小于或等于tau 0（m / n =干扰信号的符号周期与横向滤波器的插入之间的传输时间的比率; m，n个整数）。

    Method and apparatus for detecting CPM-modulated information symbols
    10.
    发明授权
    Method and apparatus for detecting CPM-modulated information symbols 有权
    用于检测CPM调制信息符号的方法和装置

    公开(公告)号：US06608873B1

    公开(公告)日：2003-08-19

    申请号：US09257115

    申请日：1999-02-25

    申请人： Bernhard Spinnler ,  Berthold Lankl ,  Johannes Huber

    发明人： Bernhard Spinnler ,  Berthold Lankl ,  Johannes Huber

    IPC分类号： H03D100

    CPC分类号： H04L25/03299 ,  H04L2025/03407

    摘要： Demodulation of CPM-modulated information symbols which are demodulated after being transmitted through an AWGN channel, using only partial whitened matched filtering, whereby finite pulses are produced which, however, are still accompanied by interferences in the form of remaining colored noise which can be approximately converted into white noise by a successive additional whitening filter so that the noise power will be minimized. For correcting the accompanying symbol interferences, a sequence estimation with reduced number of states follows.

    摘要翻译： 在通过AWGN信道发送之后解调的CPM调制的信息符号的解调，仅使用部分白化匹配滤波，由此产生有限的脉冲，然而仍然伴随着剩余彩色噪声形式的干扰，其可以是大约 通过连续的附加白化滤波器转换成白噪声，使得噪声功率将被最小化。 为了校正伴随的符号干扰，随后状态数减少的序列估计。