Title :
Adaptive transmit weights for performance enhancement in space-time transmit diversity systems
Author :
Horng, J. Henry ; Li, Ling ; Zhang, Juyong
Author_Institution :
Mitsubishi Electr. Res. Labs., Cambridge, MA, USA
Abstract :
Space-time transmit diversity (STTD) is an open loop multiantenna transmission method adopted in 3G standard. This technique uses the space-time block code (STBC) at the base station to combat deep channel fading. In order to enhance the STTD system performance, adaptive algorithms were proposed in which the corresponding information can be fed back to adjust the transmit weights according to the channel conditions. In this paper, the performances of STTD with various transmit weights and receiver structures are investigated via theoretical analysis and numerical simulations. And their respective compatibility and implementation complexity are pointed out.
Keywords :
3G mobile communication; antenna arrays; block codes; cellular radio; fading channels; receivers; space-time codes; 3G standard; adaptive algorithm; channel fading; open loop multiantenna transmission method; receiver structure; space-time block code; space-time transmit diversity; AWGN; Block codes; Diversity methods; Diversity reception; Fading; Laboratories; Performance analysis; Receiving antennas; System performance; Transmitting antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on
Print_ISBN :
0-7803-7822-9
DOI :
10.1109/PIMRC.2003.1259077