Title :
TDD-CDMA extension to FDD-CDMA based third generation cellular system
Author :
Povey, Gordon J R ; Holma, Harri ; Toskala, Antti
Author_Institution :
Edinburgh Univ., UK
Abstract :
A TDD-CDMA extension for a FDD-CDMA based third generation cellular system is considered in this paper, A system scenario is presented where frequency bands allocated to time division duplex (TDD) operation can be effectively utilized in complementing the services and increasing the capacity provided by a wide area coverage frequency division duplex (FDD) system. A flexible and simple TDD air interface capable of allocating capacity asymmetrically between the uplink and downlink is considered. Such an air interface is well suited for providing asymmetric high bit rate services. Intercell, intracell and interoperator interference problems in the asymmetric TDD-CDMA system are identified. Network complexities in FDD and TDD systems are analyzed
Keywords :
cellular radio; code division multiple access; digital radio; frequency division multiplexing; radiofrequency interference; time division multiplexing; FDD-CDMA based third generation cellular system; TDD-CDMA; air interface; asymmetric high bit rate services; capacity; downlink; frequency bands; intercell interference problems; interoperator interference problems; intracell interference problems; network complexities; time division duplex operation; uplink; wide area coverage frequency division duplex system; 3G mobile communication; Bandwidth; Bit rate; Downlink; Fading; Frequency conversion; Interference; Land mobile radio; Radio spectrum management; Telecommunication standards;
Conference_Titel :
Universal Personal Communications Record, 1997. Conference Record., 1997 IEEE 6th International Conference on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-3777-8
DOI :
10.1109/ICUPC.1997.627276
