Spread space-spectrum multiple access

B. K. Ng; E. S. Sousa

doi:10.1109/RAWCON.2003.1227881

Spread space-spectrum multiple access

B. K. Ng, E. S. Sousa

University of Toronto

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

In this paper; a new multiple access scheme suitable for the forward link transmission in a multiuser MIMO system is investigated. Unlike traditional MIMO multiple access schemes, which rely on orthogonal-temporal channels (e.g. TDMA), the proposed scheme, namely the spread space-spectrum multiple access (SSSMA), exploits the space-domain for multiuser multiplexing. As its name suggests, SSSMA utilizes the available degrees of freedom offered by the spread-spectrum and those by the multiple transmit antennas to perform multiple access. At the base-station transmitter, each coded data stream corresponding to a unique user-channel is modulated with a user-specific two-dimensional spreading sequence and added together with other channels' modulated signals. At each user's receiver, the multiple-access-interference (MAI) generated from the same base station is mitigated through iterative multiuser detection and decoding. We focus on the performance of SSSMA in two different environments: (1) local point-to-multipoint network such as central access LAN; and (2) a power-controlled cellular system. It is shown that not only does the SSSMA offer near-theoretic-capacity performance in both environments, it is able to exploit a new form of diversity, namely the space-interferers diversity, in an ideal power-controlled network while other MIMO multiple access schemes fail to do so.

Original language	English
Title of host publication	Proceedings - 2003 IEEE Radio and Wireless Conference, RAWCON 2003
Editors	George Heiter
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	13-18
Number of pages	6
ISBN (Electronic)	0780378296, 9780780378292
DOIs	https://doi.org/10.1109/RAWCON.2003.1227881
Publication status	Published - 2003
Externally published	Yes
Event	2003 IEEE Radio and Wireless Conference, RAWCON 2003 - Boston, United States Duration: 10 Aug 2003 → 13 Aug 2003

Publication series

Name	Proceedings - 2003 IEEE Radio and Wireless Conference, RAWCON 2003

Conference

Conference	2003 IEEE Radio and Wireless Conference, RAWCON 2003
Country/Territory	United States
City	Boston
Period	10/08/03 → 13/08/03

Keywords

Base stations
Iterative decoding
Local area networks
MIMO
Modulation coding
Multiuser detection
Spread spectrum communication
Time division multiple access
Transmitters
Transmitting antennas

Access to Document

10.1109/RAWCON.2003.1227881

Cite this

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title = "Spread space-spectrum multiple access",

abstract = "In this paper; a new multiple access scheme suitable for the forward link transmission in a multiuser MIMO system is investigated. Unlike traditional MIMO multiple access schemes, which rely on orthogonal-temporal channels (e.g. TDMA), the proposed scheme, namely the spread space-spectrum multiple access (SSSMA), exploits the space-domain for multiuser multiplexing. As its name suggests, SSSMA utilizes the available degrees of freedom offered by the spread-spectrum and those by the multiple transmit antennas to perform multiple access. At the base-station transmitter, each coded data stream corresponding to a unique user-channel is modulated with a user-specific two-dimensional spreading sequence and added together with other channels' modulated signals. At each user's receiver, the multiple-access-interference (MAI) generated from the same base station is mitigated through iterative multiuser detection and decoding. We focus on the performance of SSSMA in two different environments: (1) local point-to-multipoint network such as central access LAN; and (2) a power-controlled cellular system. It is shown that not only does the SSSMA offer near-theoretic-capacity performance in both environments, it is able to exploit a new form of diversity, namely the space-interferers diversity, in an ideal power-controlled network while other MIMO multiple access schemes fail to do so.",

keywords = "Base stations, Iterative decoding, Local area networks, MIMO, Modulation coding, Multiuser detection, Spread spectrum communication, Time division multiple access, Transmitters, Transmitting antennas",

author = "Ng, {B. K.} and Sousa, {E. S.}",

note = "Publisher Copyright: {\textcopyright} 2003 IEEE.; 2003 IEEE Radio and Wireless Conference, RAWCON 2003 ; Conference date: 10-08-2003 Through 13-08-2003",

year = "2003",

doi = "10.1109/RAWCON.2003.1227881",

language = "English",

series = "Proceedings - 2003 IEEE Radio and Wireless Conference, RAWCON 2003",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "13--18",

editor = "George Heiter",

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address = "United States",

}

Ng, BK & Sousa, ES 2003, Spread space-spectrum multiple access. in G Heiter (ed.), Proceedings - 2003 IEEE Radio and Wireless Conference, RAWCON 2003., 1227881, Proceedings - 2003 IEEE Radio and Wireless Conference, RAWCON 2003, Institute of Electrical and Electronics Engineers Inc., pp. 13-18, 2003 IEEE Radio and Wireless Conference, RAWCON 2003, Boston, United States, 10/08/03. https://doi.org/10.1109/RAWCON.2003.1227881

Spread space-spectrum multiple access. / Ng, B. K.; Sousa, E. S.
Proceedings - 2003 IEEE Radio and Wireless Conference, RAWCON 2003. ed. / George Heiter. Institute of Electrical and Electronics Engineers Inc., 2003. p. 13-18 1227881 (Proceedings - 2003 IEEE Radio and Wireless Conference, RAWCON 2003).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Sousa, E. S.

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N2 - In this paper; a new multiple access scheme suitable for the forward link transmission in a multiuser MIMO system is investigated. Unlike traditional MIMO multiple access schemes, which rely on orthogonal-temporal channels (e.g. TDMA), the proposed scheme, namely the spread space-spectrum multiple access (SSSMA), exploits the space-domain for multiuser multiplexing. As its name suggests, SSSMA utilizes the available degrees of freedom offered by the spread-spectrum and those by the multiple transmit antennas to perform multiple access. At the base-station transmitter, each coded data stream corresponding to a unique user-channel is modulated with a user-specific two-dimensional spreading sequence and added together with other channels' modulated signals. At each user's receiver, the multiple-access-interference (MAI) generated from the same base station is mitigated through iterative multiuser detection and decoding. We focus on the performance of SSSMA in two different environments: (1) local point-to-multipoint network such as central access LAN; and (2) a power-controlled cellular system. It is shown that not only does the SSSMA offer near-theoretic-capacity performance in both environments, it is able to exploit a new form of diversity, namely the space-interferers diversity, in an ideal power-controlled network while other MIMO multiple access schemes fail to do so.

AB - In this paper; a new multiple access scheme suitable for the forward link transmission in a multiuser MIMO system is investigated. Unlike traditional MIMO multiple access schemes, which rely on orthogonal-temporal channels (e.g. TDMA), the proposed scheme, namely the spread space-spectrum multiple access (SSSMA), exploits the space-domain for multiuser multiplexing. As its name suggests, SSSMA utilizes the available degrees of freedom offered by the spread-spectrum and those by the multiple transmit antennas to perform multiple access. At the base-station transmitter, each coded data stream corresponding to a unique user-channel is modulated with a user-specific two-dimensional spreading sequence and added together with other channels' modulated signals. At each user's receiver, the multiple-access-interference (MAI) generated from the same base station is mitigated through iterative multiuser detection and decoding. We focus on the performance of SSSMA in two different environments: (1) local point-to-multipoint network such as central access LAN; and (2) a power-controlled cellular system. It is shown that not only does the SSSMA offer near-theoretic-capacity performance in both environments, it is able to exploit a new form of diversity, namely the space-interferers diversity, in an ideal power-controlled network while other MIMO multiple access schemes fail to do so.

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KW - Iterative decoding

KW - Local area networks

KW - MIMO

KW - Modulation coding

KW - Multiuser detection

KW - Spread spectrum communication

KW - Time division multiple access

KW - Transmitters

KW - Transmitting antennas

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DO - 10.1109/RAWCON.2003.1227881

M3 - Conference contribution

AN - SCOPUS:84944750692

T3 - Proceedings - 2003 IEEE Radio and Wireless Conference, RAWCON 2003

SP - 13

EP - 18

BT - Proceedings - 2003 IEEE Radio and Wireless Conference, RAWCON 2003

A2 - Heiter, George

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2003 IEEE Radio and Wireless Conference, RAWCON 2003

Y2 - 10 August 2003 through 13 August 2003

ER -

Spread space-spectrum multiple access

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Keywords

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