| 54 |
Title |
TI |
[DE] Sender mit einer geschlossenen Rückkopplung zur Modulation
[EN] Transmitter device having a modulation closed loop
[FR] Dispositif d'émetteur ayant une boucle fermée de modulation |
| 71/73 |
Applicant/owner |
PA |
LUCENT TECHNOLOGIES INC, US
|
| 72 |
Inventor |
IN |
FISCHER GEORG, DE
;
RIEMANN VOLKER, DE
|
| 22/96 |
Application date |
AD |
Feb 28, 2000 |
| 21 |
Application number |
AN |
00301545 |
|
Country of application |
AC |
EP |
|
Publication date |
PUB |
Aug 29, 2001 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
|
| 51 |
IPC main class |
ICM |
H04L 27/36
|
| 51 |
IPC secondary class |
ICS |
H03C 3/08
H03C 3/09
H04L 27/20
|
|
IPC additional class |
ICA |
|
|
IPC index class |
ICI |
|
|
Cooperative patent classification |
CPC |
H03C 3/08
H03C 3/0925
H03C 3/0941
H03C 3/0966
H03C 3/0983
H03C 3/0991
H04B 2001/0491
H04L 27/2017
|
|
MCD main class |
MCM |
|
|
MCD secondary class |
MCS |
H03C 3/08
(2006.01)
H03C 3/09
(2006.01)
H04L 27/20
(2006.01)
|
|
MCD additional class |
MCA |
H04B 1/04
(2006.01)
|
| 57 |
Abstract |
AB |
[EN] 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. <IMAGE> |
| 56 |
Cited documents identified in the search |
CT |
EP000000538903A1
EP000000731556A1
US000004972436A
US000005446423A
US000005825257A
US000005952895A
|
| 56 |
Cited documents indicated by the applicant |
CT |
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
|
|
Citing documents |
|
Determine documents
|
|
Sequence listings |
|
|
|
Search file IPC |
ICP |
H04L 27/36
|
