Transmit diversity by antenna selection in CDMA downlink

Author

Hottinen, Ari ; Wichman, Risto

Author_Institution

Nokia Res. Center, Espoo, Finland

Volume

3

fYear

1998

fDate

2-4 Sep 1998

Firstpage

767

Abstract

We study transmit diversity concepts in DS/CDMA wireless networks with multiple transmit antennas. The previously proposed diversity techniques are reviewed and their performance is compared to a selective transmit diversity (STD) concept, proposed here for CDMA systems. In all the competing concepts the encoded bits are distributed to all transmit antennas, whereas in the proposed concept bit are transmitted only from the best antenna as indicated by a closed loop antenna selection (CL-AS) subchannel from the terminal to the base. We quantify the achievable gains for these transmit diversity concepts with Monte-Carlo simulations

Keywords

Monte Carlo methods; dipole antennas; diversity reception; land mobile radio; radio links; radio networks; spread spectrum communication; transmitting antennas; CDMA downlink; DS/CDMA wireless networks; Monte-Carlo simulations; closed loop antenna selection subchannel; encoded bits; multiple transmit antennas; performance; selective transmit diversity; terminal; third generation system; transmit diversity; Bandwidth; Downlink; Finite impulse response filter; Frequency conversion; Intelligent networks; Multiaccess communication; Nonlinear filters; Receiving antennas; Space time codes; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Spread Spectrum Techniques and Applications, 1998. Proceedings., 1998 IEEE 5th International Symposium on

Conference_Location

Sun City

Print_ISBN

0-7803-4281-X

Type

conf

DOI

10.1109/ISSSTA.1998.722481

Filename

722481