Title :
Investigation of diversity and beamforming techniques for UMTS high speed downlink packet access
Author :
Chen, Yejian ; Speidel, Joachim ; Hoek, Cornelis ; Russ, Stefan
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Stuttgart Univ.
Abstract :
This paper deals with the high speed downlink packet access (HSDPA) in UMTS/FDD system. The transmit diversity and beamforming techniques are focused on, namely space time transmit diversity (STTD), closed loop mode 1 transmit diversity, conventional beamforming and closed loop beamforming with 2 transmit antennas. The link level system performance of the various methods is investigated and compared for the fading environment. At low user speeds, closed loop transmit diversity turns out to be superior. STTD has the lowest system complexity and achieves an acceptable performance at high SNR. Both beamforming schemes are the good solutions for high speed mobile terminal at low SNR
Keywords :
3G mobile communication; adaptive antenna arrays; array signal processing; diversity reception; frequency division multiplexing; packet radio networks; radio access networks; space-time adaptive processing; transmitting antennas; HSDPA; STTD; UMTS-FDD system; beamforming technique; closed loop mode; frequency division duplex; high speed downlink packet access; mobile terminal; space time transmit diversity; transmitting antennas; universal mobile telecommunication system; 3G mobile communication; Array signal processing; Channel coding; Downlink; Modulation coding; Multiaccess communication; Physical layer; System performance; Throughput; Transmitting antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on
Conference_Location :
Berlin
Print_ISBN :
9.7838007291e+012
DOI :
10.1109/PIMRC.2005.1651860
