Title :
Closed loop transmit diversity techniques for WCDMA systems
Author :
Xin, Yang ; Xiaohu, You
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing, China
Abstract :
In this paper, closed loop transmit diversity for WCDMA systems is investigated. Performance of RAKE receiver is analyzed and compared with that of space-time block coding based transmit diversity (STTD). It is shown that closed loop transmit diversity can provide a performance gain of 3dB over the open loop scheme in a single path fading channel, while the performance gain is less than 3dB in a multipath fading channel.
Keywords :
block codes; closed loop systems; code division multiple access; diversity reception; fading channels; mobile communication; multipath channels; radio receivers; space-time codes; 3 dB; RAKE receiver; closed loop transmit diversity; code division multiple access; multipath fading channel; performance gain; single path fading channel; space time block coding; wideband CDMA systems; Antennas and propagation; Fading; Feedback loop; Multiaccess communication; Multipath channels; Performance analysis; Performance gain; Radio transmitters; Receiving antennas; Transmitting antennas;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1281150
