NDLI: Effects of open-loop transmit diversity schemes with four antennas on control signals using cyclic-shift CDMA

Content Provider	IEEE Xplore Digital Library
Author	Hikosaka, Y. Kawamura, T. Taoka, H. Sawahashi, M.
Copyright Year	2012
Description	Author affiliation: Radio Access Network Development Department, NTT DOCOMO, INC. (Kawamura, T.) \|\| DOCOMO Communications Laboratories Europe GmbH (Taoka, H.) \|\| Department of Information Network Engineering, Tokyo City University (Hikosaka, Y.; Sawahashi, M.)
Abstract	This paper investigates the effects of open-loop transmit diversity schemes with four antennas on low-rate control signals using cyclic shift (CS)-CDMA for single-carrier (SC)-frequency division multiples access (FDMA). More specifically, we investigate the average block error rate (BLER) performance levels of space orthogonal-resource transmit diversity (SORTD) and a combination of space-time block code (STBC) and time-switched transmit diversity (TSTD) for NRx = 2 and 4 antenna diversity reception. Computer simulation results show that for NTx = 4 transmission antennas, SORTD significantly decreases the required average received signal-to-noise power ratio (SNR) that satisfies the target average BLER compared to the combination of STBC and TSTD due to the minimum mean-square error combining (MMSEC) gain from the 4 antennas. We show that for NRx = 2, the required average received SNR at the average BLER of $10^{−2}$ and $10^{−3}$ using SORTD with NTx = 4 antennas is decreased by approximately 0.6 and 1.5 dB, respectively, compared to that for SORTD with NTx = 2 antennas. Moreover, we show that even with NRx = 4-antenna receiver diversity, NTx = 4-antenna SORTD is effective in decreasing the required average received SNR when a large number of control channels such as K = 12 are multiplexed during a short cyclic shift, in which severe inter-code interference occurs.
Starting Page	301
Ending Page	305
File Size	401534
Page Count	5
File Format	PDF
ISBN	9781467345330
ISSN	18825621
e-ISBN	9789860334074
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-24
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	NiCT
Subject Keyword	Multiplexing Transmitting antennas Receiving antennas Channel estimation Interference Control signals Cyclic-shift CDMA Transmit diversity Inter-code interference Signal to noise ratio Single-carrier FDMA
Content Type	Text
Resource Type	Article

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