公开(公告)号：US06898257B2

公开(公告)日：2005-05-24

申请号：US09788900

申请日：2001-02-20

申请人： Georg Fischer ,  Volker Riemann

发明人： Georg Fischer ,  Volker Riemann

IPC分类号： H03C3/08 ,  H03C3/09 ,  H04B1/04 ,  H04L27/20 ,  H03D3/24

CPC分类号： H03C3/0991 ,  H03C3/08 ,  H03C3/0925 ,  H03C3/0941 ,  H03C3/0966 ,  H03C3/0983 ,  H04B2001/0491 ,  H04L27/2017

摘要： The invention relates, inter alia, to a transmitter device, in particular for a base transceiver station in a mobile radio system, which has a digital modulator for making available a signal containing a phase information, and a modulation closed loop having a digital phase comparator operating at baseband whose first input is connected to the output of the digital modulator. In addition, a controllable oscillator is provided for generating an RF transmission signal at a controllable transmission frequency, a device which is assigned to the controllable oscillator and has the purpose of converting the RF transmission signal into a baseband signal containing a phase information. The output of the converter device is connected to a second input of the digital phase comparator.A GSM transmitter which has such a modulation closed loop exhibits, in terms of its out-band noise and interference characteristics, significantly improved properties in comparison with a GSM transmitter which does not include a modulation loop.

摘要翻译： 本发明尤其涉及一种发射机设备，特别是涉及一种移动无线电系统中的基站收发信机，其具有用于提供包含相位信息的信号的数字调制器和具有数字相位比较器的调制闭环 在基带处工作，其第一输入连接到数字调制器的输出端。 此外，提供可控制的振荡器，用于以可控的传输频率产生RF传输信号，分配给可控振荡器的装置，并且其目的是将RF传输信号转换成包含相位信息的基带信号。 转换器装置的输出连接到数字相位比较器的第二输入端。 与不包括调制环路的GSM发射机相比，具有这种调制闭环的GSM发射机在其带外噪声和干扰特性方面表现出显着改善的特性。

公开(公告)号：US3941945A

公开(公告)日：1976-03-02

申请号：US395456

申请日：1973-09-10

申请人： Manfred Borner ,  Gisbert Glasmachers ,  Otto Bernecker ,  Volker Riemann ,  Stefan Maslowski

发明人： Manfred Borner ,  Gisbert Glasmachers ,  Otto Bernecker ,  Volker Riemann ,  Stefan Maslowski

IPC分类号： H04N5/85 ,  G11B7/13 ,  H01S5/062 ,  G11B11/16

CPC分类号： G11B7/13 ,  H01S5/06213

摘要： A pickup system for playing back signals stored on the surface of a carrier in a form providing an optically detectable property which varies as a function of the time pattern of the stored signals, the storage being constituted by undulations or variations in the reflectivity of the carrier surface and the pickup system employing a laser beam which is reflected in a manner controlled by the stored information. The system includes a laser radiation generating element forming part of an optical resonator which also includes the carrier surface so that the intensity of radiation oscillations in the resonator is influenced by the surface and varies as the carrier moves relative to the laser element. The system also includes an output member for converting such intensity variations into an electrical signal representative of the stored signals.

摘要翻译： 拾取系统，用于以提供可被存储的信号的时间图形的函数变化的光学可检测特性的形式回放存储在载体表面上的信号，该存储由起伏或者载体的反射率的变化构成 表面和拾取系统采用以由存储的信息控制的方式反射的激光束。 该系统包括形成光谐振器的一部分的激光辐射发生元件，该谐振器还包括载体表面，使得谐振器中的辐射振荡的强度受到表面的影响，并且随着载体相对于激光元件的移动而变化。 该系统还包括用于将这种强度变化转换为表示存储的信号的电信号的输出构件。