Design and implementation of a DDS‐based multi‐carrier GMSK modulator | Zendy

Kesoulis M. J. | Zendy; Koukourlis C. S. | Zendy; Lygouras J. N. | Zendy; Soudris D. | Zendy; Sahalos J. N. | Zendy

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Design and implementation of a DDS‐based multi‐carrier GMSK modulator

Author(s) -

Kesoulis M. J.,

Koukourlis C. S.,

Lygouras J. N.,

Soudris D.,

Sahalos J. N.

Publication year - 2009

Publication title -

international journal of communication systems

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.344

H-Index - 49

eISSN - 1099-1131

pISSN - 1074-5351

DOI - 10.1002/dac.1014

Subject(s) - minimum shift keying , baseband , computer science , field programmable gate array , gsm , gate array , direct digital synthesizer , embedded system , electronic engineering , computer hardware , telecommunications , frequency synthesizer , quadrature amplitude modulation , phase locked loop , bandwidth (computing) , engineering , bit error rate , channel (broadcasting) , jitter

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.

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