NDLI: Initial and Post-Initial Acquisition in the Serial Search Based Noncoherent Multiple Transmit/Receive Antenna Aided DS-CDMA Downlink

Content Provider	IEEE Xplore Digital Library
Author	SeungHwan Won Hanzo, L.
Copyright Year	2006
Description	Author affiliation: Sch. of Electr. & Comput. Sci., Southampton Univ. (SeungHwan Won; Hanzo, L.)
Abstract	In this paper we investigate the issues of both initial and post-initial acquisition schemes in the multiple transmit/receive antenna aided DS-CDMA downlink, when communicating over uncorrelated Rayleigh channels. The associated mean acquisition time (MAT) performance trends are characterised as a function of the number of transmit/receive antennas. Furthermore, we characterise both the initial and post-initial acquisition performance as a function of the relevant system parameters. It is demonstrated that in contrast to our expectations, the achievable MAT degrades at low $E_{c}/I_{o$values, except for the case of P = 2 transmit antennas operating in conjunction with R = 1 receive antenna over the specific signal-to-interference plus noise ratio (SINR) per chip $(E_{c}/I$ $_{o})$ range considered, as the number of transmit antennas is increased. Ironically, our findings suggest that increasing the number of transmit antennas in a MIMO-aided CDMA system results in combining the low-energy, noise-contaminated signals of the transmit antennas, which ultimately increases the MAT by an order of magnitude, when the SINR is relatively low. This phenomenon has a detrimental effect on the performance of Rake receiver based synchronisation schemes, when the perfectly synchronised system is capable of attaining its target bit error rate performance at reduced SINR values, as a benefit of employing multiple transmit antennas. Therefore our future research will be focused on specifically designing acquisition schemes for MIMO systems
Starting Page	2246
Ending Page	2250
File Size	1538228
Page Count	5
File Format	PDF
ISBN	0780393910
ISSN	15502252
DOI	10.1109/VETECS.2006.1683256
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-05-07
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Receiving antennas Multiaccess communication Downlink Transmitting antennas Signal to noise ratio Rayleigh channels Degradation Fading Multipath channels Bit error rate
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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