Power allocation and spectral efficiency of DS-CDMA systems in fading channels with fixed QoS-part I: Single-rate case

Husheng Li; H. Vincent Poor

doi:10.1109/TWC.2006.1687775

Power allocation and spectral efficiency of DS-CDMA systems in fading channels with fixed QoS-part I: Single-rate case

Husheng Li, H. Vincent Poor

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Power allocation and the resulting spectral efficiency are considered for DS-CDMA systems operating over fading channels with a fixed single quality of service (QoS) requirement. For systems both with and without channel state information at the transmitter, the decoding scheme of successive interference cancellation combined with minimum mean square error (SIC+MMSE) multiuser detection is shown to minimize the total transmitting power under certain conditions. Both upper and lower bounds on the required receive power are obtained for SIC+MMSE systems with channel state information at transmitters (CSIT) and an analytical expression for the required transmit power is obtained for SIC+MMSE systems without CSIT. The parameters of spectral efficiency in both low and high energy regions are obtained. The good performance of SIC+MMSE in non-elastic traffic systems is also demonstrated.

Original language	English (US)
Article number	1687775
Pages (from-to)	2516-2528
Number of pages	13
Journal	IEEE Transactions on Wireless Communications
Volume	5
Issue number	9
DOIs	https://doi.org/10.1109/TWC.2006.1687775
State	Published - Sep 2006

All Science Journal Classification (ASJC) codes

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

Keywords

Direct sequence code division multiple access (DS-CDMA)
Minimum mean square error (MMSE)
Multiuser detection
Spectral efficiency
Successive interference cancellation (SIC)

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10.1109/TWC.2006.1687775

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title = "Power allocation and spectral efficiency of DS-CDMA systems in fading channels with fixed QoS-part I: Single-rate case",

abstract = "Power allocation and the resulting spectral efficiency are considered for DS-CDMA systems operating over fading channels with a fixed single quality of service (QoS) requirement. For systems both with and without channel state information at the transmitter, the decoding scheme of successive interference cancellation combined with minimum mean square error (SIC+MMSE) multiuser detection is shown to minimize the total transmitting power under certain conditions. Both upper and lower bounds on the required receive power are obtained for SIC+MMSE systems with channel state information at transmitters (CSIT) and an analytical expression for the required transmit power is obtained for SIC+MMSE systems without CSIT. The parameters of spectral efficiency in both low and high energy regions are obtained. The good performance of SIC+MMSE in non-elastic traffic systems is also demonstrated.",

keywords = "Direct sequence code division multiple access (DS-CDMA), Minimum mean square error (MMSE), Multiuser detection, Spectral efficiency, Successive interference cancellation (SIC)",

author = "Husheng Li and Poor, {H. Vincent}",

note = "Funding Information: Manuscript received June 29, 2004; revised July 12, 2005 and February 9, 2006; accepted March 24, 2006. The associate editor coordinating the review of this paper and approving it for publication was K. B. Lee. This research was supported in part by the National Science Foundation under Grant No. ANI-03-38807 and in part by the New Jersey Center for Wireless Telecommunications. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.",

year = "2006",

month = sep,

doi = "10.1109/TWC.2006.1687775",

language = "English (US)",

volume = "5",

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journal = "IEEE Transactions on Wireless Communications",

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T2 - Single-rate case

AU - Li, Husheng

AU - Poor, H. Vincent

N1 - Funding Information: Manuscript received June 29, 2004; revised July 12, 2005 and February 9, 2006; accepted March 24, 2006. The associate editor coordinating the review of this paper and approving it for publication was K. B. Lee. This research was supported in part by the National Science Foundation under Grant No. ANI-03-38807 and in part by the New Jersey Center for Wireless Telecommunications. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.

PY - 2006/9

Y1 - 2006/9

N2 - Power allocation and the resulting spectral efficiency are considered for DS-CDMA systems operating over fading channels with a fixed single quality of service (QoS) requirement. For systems both with and without channel state information at the transmitter, the decoding scheme of successive interference cancellation combined with minimum mean square error (SIC+MMSE) multiuser detection is shown to minimize the total transmitting power under certain conditions. Both upper and lower bounds on the required receive power are obtained for SIC+MMSE systems with channel state information at transmitters (CSIT) and an analytical expression for the required transmit power is obtained for SIC+MMSE systems without CSIT. The parameters of spectral efficiency in both low and high energy regions are obtained. The good performance of SIC+MMSE in non-elastic traffic systems is also demonstrated.

AB - Power allocation and the resulting spectral efficiency are considered for DS-CDMA systems operating over fading channels with a fixed single quality of service (QoS) requirement. For systems both with and without channel state information at the transmitter, the decoding scheme of successive interference cancellation combined with minimum mean square error (SIC+MMSE) multiuser detection is shown to minimize the total transmitting power under certain conditions. Both upper and lower bounds on the required receive power are obtained for SIC+MMSE systems with channel state information at transmitters (CSIT) and an analytical expression for the required transmit power is obtained for SIC+MMSE systems without CSIT. The parameters of spectral efficiency in both low and high energy regions are obtained. The good performance of SIC+MMSE in non-elastic traffic systems is also demonstrated.

KW - Direct sequence code division multiple access (DS-CDMA)

KW - Minimum mean square error (MMSE)

KW - Multiuser detection

KW - Spectral efficiency

KW - Successive interference cancellation (SIC)

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Power allocation and spectral efficiency of DS-CDMA systems in fading channels with fixed QoS-part I: Single-rate case

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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