Paper Info
Title
Design and implementation of a DDS-based multi-carrier GMSK modulator
Abstract
The design and hardware implementation of a multi-carrier Gaussian minimum shift keying (GMSK) modulator, based on a direct digital synthesizer, suitable for global system for mobile (GSM) base station applications is described. The synthesizer does not only generate the baseband GMSK signal, but also delivers it at a low IF. Special care has been taken in order to minimize the required memory of the synthesizer. The hardware implementation is mainly based on a field programmable gate array device (FPGA) and a D-A converter. The number of carriers depends on the size of the FPGA. Finally, the hardware implementation of a two-carrier modulator is given. Copyright © 2009 John Wiley & Sons, Ltd. Direct Digital Synthesizer (DDS) is a common component in a variety of communications systems, since it uses digital circuitry to create, manipulate and modulate a signal and has several advantages including fast settling, fine step sizes, simple implementation. We have designed and implemented a DDS-based multicarrier GMSK modulator, where a modified all-digital GMSK filter and an innovative DDS are reused in order to compose and multiplex several GMSK modulated signals generating a modulated IF signal in an earlier stage prior to the transmitting antenna of a GSM communication base station. Copyright © 2009 John Wiley & Sons, Ltd.
Year
DOI
Venue
2009
10.1002/dac.v22:8
Int. J. Communication Systems
Keywords
Field
DocType
gaussian filter,gsm
Base station,Baseband,GSM,Telecommunications,Computer science,Minimum-shift keying,Communications system,Field-programmable gate array,Real-time computing,Modulation,Computer hardware,Direct digital synthesizer
Journal
Volume
Issue
ISSN
22
8
1074-5351
Citations 
PageRank 
References 
1
0.36
6
Authors
5
Name
Order
Citations
PageRank
Marios Kesoulis110.70
C. S. Koukourlis2346.17
J. N. Lygouras3535.33
Dimitrios Soudris436958.95
J. N. Sahalos594.10