Orthogonal re-spread for uplink WCDMA beamforming

RJ Piechocki; CN Canagarajah; JP McGeehan; G Tsoulos

doi:10.1109/VETECS.2000.851349

Orthogonal re-spread for uplink WCDMA beamforming

RJ Piechocki, CN Canagarajah, JP McGeehan, G Tsoulos

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

2 Citations (Scopus)

335 Downloads (Pure)

Abstract

This paper presents a new extraction method for the spatial correlation matrix of interference and noise only based on orthogonal re-spreading. The method uses one of the remaining orthogonal variable spreading factor (OVSF) code that is orthogonal to all traffic and control channels to spread energy form the desired user while attempting to maintain the same level of co-channel interference. De-spreading with the assigned OVSF codes that is performed in parallel provides the usual noisy correlation matrix. With those two matrices at hand optimal beamforming using maximal signal-to-interference ratio (MSIR) criterion is readily performed. Although the matrix extracted by the orthogonal re-spread is not a statistically consistent estimate, remarkable potentials in practical situations are demonstrated.

Translated title of the contribution	Orthogonal Re-spread for Uplink WCDMA Beamforming
Original language	English
Title of host publication	IEEE Vehicular Technology Conference, Tokyo
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	1373 - 1376
Number of pages	4
Volume	2
ISBN (Print)	0780357183
DOIs	https://doi.org/10.1109/VETECS.2000.851349
Publication status	Published - May 2000
Event	51st Vehicular Technology Conference 2000 (VTC 2000-Spring) - Tokyo, Japan Duration: 1 May 2000 → …

Conference

Conference	51st Vehicular Technology Conference 2000 (VTC 2000-Spring)
Country/Territory	Japan
City	Tokyo
Period	1/05/00 → …

Bibliographical note

Rose publication type: Conference contribution

Sponsorship: The authors wish to thank Fujitsu Europe Telecom R&D Centre Ltd. for sponsoring the work presented in this paper.

Terms of use: Copyright © 2000 IEEE. Reprinted from Proceedings of IEEE Vehicular Technology Conference, Spring 2000. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected].

By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Keywords

adaptive antenna arrays

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10.1109/VETECS.2000.851349

Piechocki IEEE VTC Spring2000Accepted author manuscript, 53 KB

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title = "Orthogonal re-spread for uplink WCDMA beamforming",

abstract = "This paper presents a new extraction method for the spatial correlation matrix of interference and noise only based on orthogonal re-spreading. The method uses one of the remaining orthogonal variable spreading factor (OVSF) code that is orthogonal to all traffic and control channels to spread energy form the desired user while attempting to maintain the same level of co-channel interference. De-spreading with the assigned OVSF codes that is performed in parallel provides the usual noisy correlation matrix. With those two matrices at hand optimal beamforming using maximal signal-to-interference ratio (MSIR) criterion is readily performed. Although the matrix extracted by the orthogonal re-spread is not a statistically consistent estimate, remarkable potentials in practical situations are demonstrated.",

keywords = "adaptive antenna arrays",

author = "RJ Piechocki and CN Canagarajah and JP McGeehan and G Tsoulos",

note = "Rose publication type: Conference contribution Sponsorship: The authors wish to thank Fujitsu Europe Telecom R&D Centre Ltd. for sponsoring the work presented in this paper. Terms of use: Copyright {\textcopyright} 2000 IEEE. Reprinted from Proceedings of IEEE Vehicular Technology Conference, Spring 2000. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. By choosing to view this document, you agree to all provisions of the copyright laws protecting it. ; 51st Vehicular Technology Conference 2000 (VTC 2000-Spring) ; Conference date: 01-05-2000",

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Piechocki, RJ, Canagarajah, CN, McGeehan, JP & Tsoulos, G 2000, Orthogonal re-spread for uplink WCDMA beamforming. in IEEE Vehicular Technology Conference, Tokyo. vol. 2, Institute of Electrical and Electronics Engineers (IEEE), pp. 1373 - 1376, 51st Vehicular Technology Conference 2000 (VTC 2000-Spring), Tokyo, Japan, 1/05/00. https://doi.org/10.1109/VETECS.2000.851349

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T1 - Orthogonal re-spread for uplink WCDMA beamforming

AU - Piechocki, RJ

AU - Canagarajah, CN

AU - McGeehan, JP

AU - Tsoulos, G

N1 - Rose publication type: Conference contribution Sponsorship: The authors wish to thank Fujitsu Europe Telecom R&D Centre Ltd. for sponsoring the work presented in this paper. Terms of use: Copyright © 2000 IEEE. Reprinted from Proceedings of IEEE Vehicular Technology Conference, Spring 2000. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

PY - 2000/5

Y1 - 2000/5

N2 - This paper presents a new extraction method for the spatial correlation matrix of interference and noise only based on orthogonal re-spreading. The method uses one of the remaining orthogonal variable spreading factor (OVSF) code that is orthogonal to all traffic and control channels to spread energy form the desired user while attempting to maintain the same level of co-channel interference. De-spreading with the assigned OVSF codes that is performed in parallel provides the usual noisy correlation matrix. With those two matrices at hand optimal beamforming using maximal signal-to-interference ratio (MSIR) criterion is readily performed. Although the matrix extracted by the orthogonal re-spread is not a statistically consistent estimate, remarkable potentials in practical situations are demonstrated.

AB - This paper presents a new extraction method for the spatial correlation matrix of interference and noise only based on orthogonal re-spreading. The method uses one of the remaining orthogonal variable spreading factor (OVSF) code that is orthogonal to all traffic and control channels to spread energy form the desired user while attempting to maintain the same level of co-channel interference. De-spreading with the assigned OVSF codes that is performed in parallel provides the usual noisy correlation matrix. With those two matrices at hand optimal beamforming using maximal signal-to-interference ratio (MSIR) criterion is readily performed. Although the matrix extracted by the orthogonal re-spread is not a statistically consistent estimate, remarkable potentials in practical situations are demonstrated.

KW - adaptive antenna arrays

U2 - 10.1109/VETECS.2000.851349

DO - 10.1109/VETECS.2000.851349

M3 - Conference Contribution (Conference Proceeding)

SN - 0780357183

VL - 2

SP - 1373

EP - 1376

BT - IEEE Vehicular Technology Conference, Tokyo

PB - Institute of Electrical and Electronics Engineers (IEEE)

T2 - 51st Vehicular Technology Conference 2000 (VTC 2000-Spring)

Y2 - 1 May 2000

ER -

Orthogonal re-spread for uplink WCDMA beamforming

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