EP 1405418 A2 20040407 - METHOD AND DEVICE FOR PRODUCING MOBILE RADIO SIGNALS
Title (en)
METHOD AND DEVICE FOR PRODUCING MOBILE RADIO SIGNALS
Title (de)
VERFAHREN UND EINRICHTUNG ZUM ERZEUGEN VON MOBILFUNKSIGNALEN
Title (fr)
PROCEDE ET DISPOSITIF POUR PRODUIRE DES SIGNAUX RADIO MOBILES
Publication
Application
Priority
- DE 0201899 W 20020523
- DE 10133514 A 20010710
Abstract (en)
[origin: WO03007478A2] 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).
IPC 1-7
IPC 8 full level
H03C 3/09 (2006.01); H03L 7/16 (2006.01); H03L 7/22 (2006.01)
CPC (source: EP US)
H03C 3/0941 (2013.01 - EP US); H03C 3/0966 (2013.01 - EP US); H03C 3/0983 (2013.01 - EP US); H03L 7/16 (2013.01 - EP US); H03L 7/22 (2013.01 - EP US); H03L 2207/12 (2013.01 - EP US)
Citation (search report)
See references of WO 03007478A2
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 03007478 A2 20030123; WO 03007478 A3 20030522; WO 03007478 A8 20030313; CN 1605156 A 20050406; DE 10133514 A1 20030130; EP 1405418 A2 20040407; US 2004176045 A1 20040909
DOCDB simple family (application)
DE 0201899 W 20020523; CN 02813935 A 20020523; DE 10133514 A 20010710; EP 02745084 A 20020523; US 48386804 A 20040112