DocumentCode :
3017239
Title :
Benefits of combined TDMA/CDMA operation for third generation mobile radio systems
Author :
Kammerlander, Karl
Author_Institution :
Siemens AG, Munich, Germany
Volume :
2
fYear :
1996
fDate :
22-25 Sep 1996
Firstpage :
507
Abstract :
The multimedia landscape requires a new approach to powerful mobile radio systems, termed Universal Mobile Telecommunication System (UMTS), which must be suited for both narrowband and broadband transmission. The UMTS therefore requires a balanced hybrid multiple access scheme. This paper presents an attempt to combine the F/TDMA and F/CDMA advantages in F/T/CDMA which facilitates a favourably high economical efficiency, regarding the investments of future network operators, as well as high channel efficiencies, in terms of a high number of traffic channels per transceiver. F/T/CDMA thus leads to a low number of small base stations (BSs) and a high spectral efficiency by dense frequency reuse. Furthermore, F/T/CDMA allows backward compatibility with GSM. The paper explains the basic relations of mobile radio systems in regard to spectral efficiency, economical efficiency and multiple access schemes as well as the most important ETSI-UMTS requirements. A novel approach to assessing F/T/CDMA by means of joint detection (JD) techniques, termed JD-CDMA, is presented. JD-CDMA allows one to overcome the drawbacks of conventional CDMA mobile radio systems
Keywords :
cellular radio; code division multiple access; frequency allocation; land mobile radio; pseudonoise codes; radio spectrum management; radiofrequency interference; spread spectrum communication; time division multiple access; 2 GHz; DS-CDMA; ETSI; F/CDMA; F/T/CDMA; F/TDMA; JD-CDMA; TDMA/CDMA; UMTS; Universal Mobile Telecommunication System; balanced hybrid multiple access; broadband transmission; dense frequency reuse; economic efficiency; high channel efficiencies; high spectral efficiency; intercell interference; joint detection; multimedia; narrowband transmission; network operators; small base stations; third generation mobile radio systems; traffic channels; transceiver; 3G mobile communication; Investments; Land mobile radio; Multiaccess communication; Multimedia systems; Narrowband; Power generation economics; Telecommunication traffic; Time division multiple access; Transceivers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Spread Spectrum Techniques and Applications Proceedings, 1996., IEEE 4th International Symposium on
Conference_Location :
Mainz
Print_ISBN :
0-7803-3567-8
Type :
conf
DOI :
10.1109/ISSSTA.1996.563179
Filename :
563179
Link To Document :
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