Differential Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Aided DS-CDMA Downlink
Differential Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Aided DS-CDMA Downlink
In this contribution we investigate both differentially coherent and noncoherent code acquisition schemes in the multiple transmit/receive antenna aided DS-CDMA downlink, when communicating over uncorrelated Rayleigh channels. It is demonstrated that in contrast to our expectations, the achievable Mean Acquisition Time (MAT) degrades at low Ec/Io values, as the number of transmit antennas is increased in both differentially coherent and noncoherent code acquisition system scenarios, even though the degree of performance degradation depends upon the specific scheme considered. 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. Therefore our future research will be aimed at specifically designing acquisition schemes for MIMO systems.
1009-1014
Won, S-H.
aeef1817-3d64-4a1c-a773-365a61dd817a
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
2006
Won, S-H.
aeef1817-3d64-4a1c-a773-365a61dd817a
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Won, S-H. and Hanzo, L.
(2006)
Differential Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Aided DS-CDMA Downlink.
IEEE WCNC'06, Las Vegas, Nevada, United States.
03 - 06 Apr 2006.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
In this contribution we investigate both differentially coherent and noncoherent code acquisition schemes in the multiple transmit/receive antenna aided DS-CDMA downlink, when communicating over uncorrelated Rayleigh channels. It is demonstrated that in contrast to our expectations, the achievable Mean Acquisition Time (MAT) degrades at low Ec/Io values, as the number of transmit antennas is increased in both differentially coherent and noncoherent code acquisition system scenarios, even though the degree of performance degradation depends upon the specific scheme considered. 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. Therefore our future research will be aimed at specifically designing acquisition schemes for MIMO systems.
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shw-lh-WCNC06.pdf
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Published date: 2006
Additional Information:
Event Dates: 3-6 April 2006
Venue - Dates:
IEEE WCNC'06, Las Vegas, Nevada, United States, 2006-04-03 - 2006-04-06
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 261719
URI: http://eprints.soton.ac.uk/id/eprint/261719
PURE UUID: 9aade95b-969f-4f58-9bd0-13cd8d68e166
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Date deposited: 22 Dec 2005
Last modified: 18 Mar 2024 02:33
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Contributors
Author:
S-H. Won
Author:
L. Hanzo
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