Title :
Antenna switching scheme for downlink time switched transmit diversity with ARQ in the WCDMA LCR-TDD system
Author :
Jeon, Cha-Eul ; Hwang, Seung-Hoon ; Choi, Byoung-Jo
Author_Institution :
Dept. of Electron. Eng., Dongguk Univ., Seoul, South Korea
Abstract :
In this paper, the antenna switching scheme is proposed for Time Switched Transmit Diversity (TSTD) with ARQ (automatic repeat request) in WCDMA LCR-TDD systems, and the system performances are also investigated. The proposed TSTD system employs the ARQ scheme in which the receiver sends the acknowledgement signal (ACK or NACK) to the transmitter in order to predict the condition of the channel. For the ARQ-aided TSTD system, the proposed antenna switching pattern triggers the transmit antenna switches. Simulation results demonstrate that the performances of the TSTD systems can be improved by applying the ARQ scheme. Furthermore, the performances of ARQ-aided TSTD systems may be significantly improved by applying the proposed antenna switching scheme, especially when the mobile speed is low.
Keywords :
antennas; automatic repeat request; code division multiple access; diversity reception; telecommunication switching; ARQ scheme; WCDMA LCR-TDD system; acknowledgement signal; antenna switching scheme; downlink time switched transmit diversity; transmit antenna switches; 3G mobile communication; Antenna feeds; Automatic repeat request; Communication switching; Data communication; Diversity methods; Downlink; Multiaccess communication; Switches; Transmitting antennas; Antenna switching; Automatic Repeat reQuest; Time Switched Transmit Diversity; Transmit Diversity;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2009 IEEE 20th International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5122-7
Electronic_ISBN :
978-1-4244-5123-4
DOI :
10.1109/PIMRC.2009.5449879