Areal spectrum utilization efficiency in digital radio link networks

Author

Henriksson, Jonas ; Salo, Erik

Author_Institution

Nokia Res. Centre, Helsinki, Finland

fYear

1988

fDate

13-17 Jun 1988

Firstpage

404

Lastpage

407

Abstract

Areal spectral efficiencies of three digital modulation methods (QPSK, 8-PSK and 16-QAM) used in digital radio relay systems are studied. It turns out that the key feature to efficient total spectrum space usage is the interference tolerance of the used modulation method. Star point analyses indicate that QPSK (quadrature phase-shift keying) allows the smallest angles between neighbouring hops and that the total node capacity with QPSK is the highest for small and moderate fading margins. Analyses of a mesh network model accentuates the observation showing that the areal spectrum efficiencies of QPSK, 8-PSK and 16-QAM are related as 10:3:1 independently of fading margins under relatively general assumptions

Keywords

digital radio systems; frequency allocation; modulation; radio networks; 16-QAM; 8-PSK; QPSK; areal spectrum utilization efficiency; digital modulation; digital radio link networks; interference tolerance; mesh network; quadrature phase-shift keying; spectrum space usage; star point analysis; Digital communication; Error probability; Fading; Intelligent networks; Interference; Mesh networks; Quadrature phase shift keying; Radio link; Relays; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrotechnics, 1988. Conference Proceedings on Area Communication, EUROCON 88., 8th European Conference on

Conference_Location

Stockholm

Type

conf

DOI

10.1109/EURCON.1988.11187

Filename

11187