TDMA based adaptive modulation with dynamic channel assignment (AMDCA) for large capacity voice transmission in microcellular systems

Author

Ikeda, T. ; Sampei, S. ; Morinaga, N.

Author_Institution

Fac. of Eng., Osaka Univ., Japan

Volume

32

Issue

13

fYear

1996

fDate

6/20/1996 12:00:00 AM

Firstpage

1175

Lastpage

1176

Abstract

The authors propose an adaptive modulation with dynamic channel assignment (AMDCA) to achieve high capacity voice transmission in microcellular systems. The proposed system measures the received carrier-to-noise plus interference power ratio (C/(N+I)) of each time division multiple access (TDMA) slot to search for available slots and to discover the optimum modulation parameters for each slot, thereby effectively combining the buffeting effect of spatially distributed electric field strength by slow adaptive modulation, and that of spatially and temporally distributed traffic by dynamic channel assignment (DCA). Computer simulation confirms that the proposed AMDCA system can achieve ~7.5 times higher system capacity than the conventional QPSR with a fixed channel assignment (FCA)

Keywords

adaptive signal processing; cellular radio; channel capacity; frequency allocation; interference (signal); modulation; telecommunication traffic; time division multiple access; voice communication; TDMA based adaptive modulation; dynamic channel assignment; high capacity transmission; large capacity voice transmission; microcellular systems; optimum modulation parameters; time division multiple access slot;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:19960796

Filename

502985