Title :
Performance evaluation of fixed-beam beamforming in WCDMA downlink
Author :
Tiirola, Esa ; Ylitalo, Juha
Author_Institution :
Radio Access Syst., Nokia Networks, Oulu, Finland
Abstract :
This paper studies downlink beamforming applied to the WCDMA system. The downlink performance of single-antenna transmission in a base station (BS) sector with 120° (reference case) is compared to the beamforming with a fixed-beam antenna array having two beams. The paper consists of link level simulations and the analysis of the simulation results. The performance is studied by using the so-called G-modelling principles, where G denotes geometry. Simulation results indicate that the fixed-beam approach could offer feasible coverage and capacity extension especially in macro cell environments. The downlink performance of a beamforming WCDMA BS deteriorates significantly in environments with large angular spread
Keywords :
adaptive antenna arrays; array signal processing; broadband networks; cellular radio; cochannel interference; code division multiple access; digital simulation; fading channels; multiuser channels; radio links; WCDMA downlink; base station sector; capacity extension; co-channel interference; downlink beamforming; downlink performance; fading; fixed-beam antenna array; fixed-beam beamforming; geometry-modelling principles; large angular spread; link level simulations; macro cell environments; performance evaluation; simulation results analysis; single-antenna transmission; Analytical models; Antenna arrays; Array signal processing; Base stations; Downlink; Fading; Geometry; Interference; Multiaccess communication; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851215
