Title :
System performance of multibeam antennas HS-DSCH WCDMA system
Author :
Osseiran, Afif ; Ericson, Mårten
Author_Institution :
Ericsson Res., Stockholm, Sweden
Abstract :
This paper summarizes the results for system performance of the WCDMA high speed downlink shared channel (HS-DSCH), where base stations are equipped with multibeam antennas employing four fixed beams (FB) per sector. The implemented version assumes that each beam has its own HS-DSCH channel. In the FB cases the power is equally divided between the beams belonging to the same sector. Each beam employs a scrambling code, thus in total four scrambling codes per cell, compared to one scrambling code for the sector case. A secondary common pilot channel (S-CPICH) on which the UE measures the CIR is assumed to be available for the FB system. In order to investigate thoroughly the interaction between FB and HS-DSCH (analyze the effect of antenna technique), on one hand a WWW traffic model and max-CIR scheduler, and on the other hand, a continuous data stream with infinite packet size in conjunction with proportional fair scheduler, were examined. Two channel models are also investigated: the 3GPP typical urban and the pedestrian A. The results show that for four fixed beam antennas in the pedestrian A channel model and the highly dispersive channels, significant capacity gains are obtained, threefold compared to a single sector antenna.
Keywords :
3G mobile communication; Web sites; channel capacity; code division multiple access; dispersive channels; multibeam antennas; radio links; scheduling; telecommunication traffic; 3GPP urban channel model; FB system; HS-DSCH WCDMA system; S-CPICH; UE measure; WWW traffic model; capacity gain; data stream; dispersive channel; fair scheduler; fixed beam antenna; high speed downlink shared channel; max-CIR scheduler; multibeam antenna; pedestrian A channel model; scrambling code; secondary common pilot channel; system performance; wideband code division multiple access; Antenna measurements; Base stations; Channel capacity; Directional antennas; Dispersion; Downlink; Multiaccess communication; System performance; Traffic control; World Wide Web;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on
Print_ISBN :
0-7803-8523-3
DOI :
10.1109/PIMRC.2004.1368398