公开(公告)号：EP1128626B1

公开(公告)日：2005-08-24

申请号：EP00301545.0

申请日：2000-02-28

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Fischer, Georg ,  Riemann, Volker

IPC: H04L27/36 ,  H04L27/20 ,  H03C3/08 ,  H03C3/09

CPC classification number: H03C3/0991 ,  H03C3/08 ,  H03C3/0925 ,  H03C3/0941 ,  H03C3/0966 ,  H03C3/0983 ,  H04B2001/0491 ,  H04L27/2017

公开(公告)号：EP1128626A1

公开(公告)日：2001-08-29

申请号：EP00301545.0

申请日：2000-02-28

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Fischer, Georg ,  Riemann, Volker

IPC: H04L27/36

CPC classification number: H03C3/0991 ,  H03C3/08 ,  H03C3/0925 ,  H03C3/0941 ,  H03C3/0966 ,  H03C3/0983 ,  H04B2001/0491 ,  H04L27/2017

Abstract: 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 (20) for making available a signal containing a phase information, and a modulation closed loop (30) having a digital phase comparator (50) operating at baseband whose first input is connected to the output of the digital modulator (20). In addition, a controllable oscillator (80) is provided for generating an RF transmission signal at a controllable transmission frequency, a device (35) which is assigned to the controllable oscillator (80) and has the purpose of converting the RF transmission signal into a baseband signal containing a phase information. The output of the converter device (35) is connected here to a second input of the digital phase comparator (50).
A GSM transmitter which has such a modulation closed loop (30) 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.

Abstract translation: 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（20）和调制闭环（30 ）具有在基带处工作的数字相位比较器（50），其第一输入端连接到数字调制器（20）的输出端。 另外，提供了可控制的振荡器（80），用于以可控的传输频率产生RF传输信号，被分配给可控振荡器（80）的装置（35），并且其目的是将RF传输信号转换为 基带信号包含相位信息。 转换器装置（35）的输出端连接到数字相位比较器（50）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（30）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。