Title :
Interference considerations for the time division duplex mode of the UMTS Terrestrial Radio Access
Author :
Holma, Harri ; Heikkinen, Sanna ; Lehtinen, Otto-Aleksanteri ; Toskala, Antti
Author_Institution :
Nokia Networks, Finland
Abstract :
The air interface of the UMTS Terrestrial Radio Access (UTRA) covers both a frequency division duplex (FDD) part for the paired bands and a time division duplex (TDD) part for the unpaired bands of the UMTS spectrum. The Universal Mobile Telecommunication System (UMTS) is the 3rd-generation mobile communication system. This paper presents an interference evaluation of the UTRA TDD. Since both uplink and downlink share the same frequency in TDD, the signals of the two transmission directions can interfere with each other. This interference can occur between two mobile stations or between two base stations within one carrier or between two operators. The interference between uplink and downlink is evaluated by system simulations. Synchronization and coordination requirements of UTRA TDD are evaluated based on the results.
Keywords :
cellular radio; digital simulation; network interfaces; radio access networks; radio links; radiofrequency interference; synchronization; 3rd-generation mobile communication system; TDD; UMTS; UMTS Terrestrial Radio Access; UMTS spectrum; UTRA; Universal Mobile Telecommunication System; air interface; base stations; cellular radio; coordination requirements; downlink; frequency division duplex mode; frequency sharing; interference considerations; mobile stations; paired bands; synchronization requirements; system simulations; time division duplex mode; unpaired bands; uplink; 3G mobile communication; Base stations; Downlink; Frequency conversion; Frequency synchronization; Interference; Multiaccess communication; Standardization; Telecommunication standards; Telecommunication traffic;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
