发明公开
- 专利标题： VERFAHREN UND EINRICHTUNG ZUM ERZEUGEN VON MOBILFUNKSIGNALEN
- 专利标题（英）： Method and device for producing mobile radio signals
- 专利标题（中）： 方法和装置于产生移动SIGNALS
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申请号： EP02745084.0申请日： 2002-05-23
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公开(公告)号： EP1405418A2公开(公告)日： 2004-04-07
- 发明人: LILLIE, Frank
- 申请人： Siemens Aktiengesellschaft
- 申请人地址： Wittelsbacherplatz 2 80333 München DE
- 专利权人： Siemens Aktiengesellschaft
- 当前专利权人： Siemens Aktiengesellschaft
- 当前专利权人地址： Wittelsbacherplatz 2 80333 München DE
- 优先权： DE10133514 20010710
- 国际公布： WO2003007478 20030123
- 主分类号： H03L7/16
- IPC分类号： H03L7/16 ; H03B21/01
摘要：
The invention relates to a method for producing mobile radio signals using a DDS (12) (direct digital frequency synthesis) and a modulator (14), comprising the following steps: A) an intermediate frequency (fout-DDS) is produced by controlling the DDS (12) using a DDS control word (S) and a DDS clock pulse frequency (fclk-DDS), and B) the intermediate frequency (fout-DDS) is transformed into an emission frequency (fout-RF) of the mobile radio signals, using the modulator (14), according to a reference frequency (fref) of the modulator (14). According to the invention, the reference frequency (fref) of the modulator (14) is used as a DDS clock pulse frequency (fclk-DDS), said frequency being unmodified or divided by a division factor (N). In order to produce the intermediate frequency (fout-DDS), the DDS control word (S) is selected in such a way that it compensates fluctuations of the reference frequency (fref) of the modulator (14).
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