Title :
Closed loop transmit diversity enhancements for UMTS narrowband and wideband TD-CDMA
Author :
Da Silva, Mario Jeronimo ; Taffin, Arnauld ; Lasaulce, Samson ; Buljore, Soodesh
Author_Institution :
Motorola Labs., Paris, France
Abstract :
The aim of this work is to evaluate the performance gains obtained by using multiple transmit antennas at the Node B in the context of the low chip rate TDD option (1.28 Mcps TDD option) specified in 3GPP RAN WG1. Moreover, the existing high chip rate system (3.84 Mcps TDD option) is also considered as reference. The impact of using multiple transmit antennas at the Node B on different types of receivers, namely joint detection schemes and conventional matched filter, in several propagation environments, for a voice-like service (without channel coding) is characterized. Through simulation results, it is shown that, depending on the number of transmit antennas, it may be possible not to implement a multiuser detection scheme at the mobile station side in TDD mode based systems
Keywords :
cellular radio; code division multiple access; diversity reception; least mean squares methods; matched filters; radio receivers; signal detection; time division multiple access; time division multiplexing; 3GPP RAN WG1; UMTS narrowband TD-CDMA; UMTS wideband TD-CDMA; closed loop transmit diversity enhancements; conventional matched filter; high chip rate TDD mode; joint detection schemes; low chip rate TDD mode; minimum mean square error block linear joint detector; mobile station; multiple transmit antennas; multiuser detection; time division duplex; voice-like service; 3G mobile communication; Antennas and propagation; Channel coding; Matched filters; Mobile antennas; Narrowband; Performance gain; Radio access networks; Receiving antennas; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.945038
