Mobile WiMAX: impact of mobility on the performance of limited feedback linear precoding

T Tran; AR Nix; A Doufexi

doi:10.1109/VETECS.2010.5494115

Mobile WiMAX: impact of mobility on the performance of limited feedback linear precoding

T Tran, AR Nix, A Doufexi

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

1 Citation (Scopus)

430 Downloads (Pure)

Abstract

The mobile WiMAX standard (802.16e) uses multiple-input multiple-output (MIMO) limited feedback linear precoding to exploit the channel state information at the transmitter. Although the performance of limited feedback linear precoding in relation to traditional open-loop MIMO has been extensively studied in the literature, these studies commonly assume a zero-lag feedback channel. However, due to the mobile nature of the mobile station (MS), the channel feedback information at the base station (BS) is incorrect because of an inherent delay between the time the MS estimates the channel feedback information and the time it is used in the BS. This results in performance degradation compared to a zero-lag feedback channel. To date, few researchers have studied the impact of MS velocity and Doppler spread on the performance of limited feedback linear precoding. Simulation results show that the performance of the mobile WiMAX precoded system degrades significantly as the MS velocity increases. At a velocity of 3km/h the precoded system degrades by 0.1-0.2dB in terms of array gain. However, the performance drops considerably when the velocity exceeds 10 km/h. At high MS velocities (i.e., 120 km/h), the linear precoding technique fails to provide any benefits. In this high mobility case we show that a linear precoding MIMO system with more antennas experiences the same performance as an open-loop MIMO system with fewer antennas.

Translated title of the contribution	Mobile WiMAX: impact of mobility on the performance of limited feedback linear precoding
Original language	English
Title of host publication	IEEE 71st Vehicular Technology Conference 2010 (VTC 2010-Spring), Taipei, Taiwan
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	1 - 5
Number of pages	5
ISBN (Print)	9781424425181
DOIs	https://doi.org/10.1109/VETECS.2010.5494115
Publication status	Published - May 2010
Event	71st Vehicular Technology Conference 2010 (VTC 2010-Spring) - Taipei, Taiwan Duration: 1 May 2010 → …

Publication series

Name
ISSN (Print)	15502252

Conference

Conference	71st Vehicular Technology Conference 2010 (VTC 2010-Spring)
Country/Territory	Taiwan
City	Taipei
Period	1/05/10 → …

Bibliographical note

Rose publication type: Conference contribution

Terms of use: Copyright © 2010 IEEE. Reprinted from IEEE 71st Vehicular Technology Conference (VTC 2010-Spring), 2010.

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

802.16e
WiMAX
MIMO
linear precoding

Access to Document

10.1109/VETECS.2010.5494115

Tran IEEE VTC Spring 2010Accepted author manuscript, 340 KB

http://hdl.handle.net/1983/1715

Handle.net

Persistent link

Cite this

@inproceedings{30421953c04e43f1a3f7b4199e47be05,

title = "Mobile WiMAX: impact of mobility on the performance of limited feedback linear precoding",

abstract = "The mobile WiMAX standard (802.16e) uses multiple-input multiple-output (MIMO) limited feedback linear precoding to exploit the channel state information at the transmitter. Although the performance of limited feedback linear precoding in relation to traditional open-loop MIMO has been extensively studied in the literature, these studies commonly assume a zero-lag feedback channel. However, due to the mobile nature of the mobile station (MS), the channel feedback information at the base station (BS) is incorrect because of an inherent delay between the time the MS estimates the channel feedback information and the time it is used in the BS. This results in performance degradation compared to a zero-lag feedback channel. To date, few researchers have studied the impact of MS velocity and Doppler spread on the performance of limited feedback linear precoding. Simulation results show that the performance of the mobile WiMAX precoded system degrades significantly as the MS velocity increases. At a velocity of 3km/h the precoded system degrades by 0.1-0.2dB in terms of array gain. However, the performance drops considerably when the velocity exceeds 10 km/h. At high MS velocities (i.e., 120 km/h), the linear precoding technique fails to provide any benefits. In this high mobility case we show that a linear precoding MIMO system with more antennas experiences the same performance as an open-loop MIMO system with fewer antennas.",

keywords = "802.16e, WiMAX, MIMO, linear precoding",

author = "T Tran and AR Nix and A Doufexi",

note = "Rose publication type: Conference contribution Terms of use: Copyright {\textcopyright} 2010 IEEE. Reprinted from IEEE 71st Vehicular Technology Conference (VTC 2010-Spring), 2010. 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. ; 71st Vehicular Technology Conference 2010 (VTC 2010-Spring) ; Conference date: 01-05-2010",

year = "2010",

month = may,

doi = "10.1109/VETECS.2010.5494115",

language = "English",

isbn = "9781424425181",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

pages = "1 -- 5",

booktitle = "IEEE 71st Vehicular Technology Conference 2010 (VTC 2010-Spring), Taipei, Taiwan",

address = "United States",

}

Tran, T, Nix, AR & Doufexi, A 2010, Mobile WiMAX: impact of mobility on the performance of limited feedback linear precoding. in IEEE 71st Vehicular Technology Conference 2010 (VTC 2010-Spring), Taipei, Taiwan. Institute of Electrical and Electronics Engineers (IEEE), pp. 1 - 5, 71st Vehicular Technology Conference 2010 (VTC 2010-Spring), Taipei, Taiwan, 1/05/10. https://doi.org/10.1109/VETECS.2010.5494115

Mobile WiMAX: impact of mobility on the performance of limited feedback linear precoding. / Tran, T; Nix, AR; Doufexi, A.
IEEE 71st Vehicular Technology Conference 2010 (VTC 2010-Spring), Taipei, Taiwan. Institute of Electrical and Electronics Engineers (IEEE), 2010. p. 1 - 5.

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

TY - GEN

T1 - Mobile WiMAX: impact of mobility on the performance of limited feedback linear precoding

AU - Tran, T

AU - Nix, AR

AU - Doufexi, A

N1 - Rose publication type: Conference contribution Terms of use: Copyright © 2010 IEEE. Reprinted from IEEE 71st Vehicular Technology Conference (VTC 2010-Spring), 2010. 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 - 2010/5

Y1 - 2010/5

N2 - The mobile WiMAX standard (802.16e) uses multiple-input multiple-output (MIMO) limited feedback linear precoding to exploit the channel state information at the transmitter. Although the performance of limited feedback linear precoding in relation to traditional open-loop MIMO has been extensively studied in the literature, these studies commonly assume a zero-lag feedback channel. However, due to the mobile nature of the mobile station (MS), the channel feedback information at the base station (BS) is incorrect because of an inherent delay between the time the MS estimates the channel feedback information and the time it is used in the BS. This results in performance degradation compared to a zero-lag feedback channel. To date, few researchers have studied the impact of MS velocity and Doppler spread on the performance of limited feedback linear precoding. Simulation results show that the performance of the mobile WiMAX precoded system degrades significantly as the MS velocity increases. At a velocity of 3km/h the precoded system degrades by 0.1-0.2dB in terms of array gain. However, the performance drops considerably when the velocity exceeds 10 km/h. At high MS velocities (i.e., 120 km/h), the linear precoding technique fails to provide any benefits. In this high mobility case we show that a linear precoding MIMO system with more antennas experiences the same performance as an open-loop MIMO system with fewer antennas.

AB - The mobile WiMAX standard (802.16e) uses multiple-input multiple-output (MIMO) limited feedback linear precoding to exploit the channel state information at the transmitter. Although the performance of limited feedback linear precoding in relation to traditional open-loop MIMO has been extensively studied in the literature, these studies commonly assume a zero-lag feedback channel. However, due to the mobile nature of the mobile station (MS), the channel feedback information at the base station (BS) is incorrect because of an inherent delay between the time the MS estimates the channel feedback information and the time it is used in the BS. This results in performance degradation compared to a zero-lag feedback channel. To date, few researchers have studied the impact of MS velocity and Doppler spread on the performance of limited feedback linear precoding. Simulation results show that the performance of the mobile WiMAX precoded system degrades significantly as the MS velocity increases. At a velocity of 3km/h the precoded system degrades by 0.1-0.2dB in terms of array gain. However, the performance drops considerably when the velocity exceeds 10 km/h. At high MS velocities (i.e., 120 km/h), the linear precoding technique fails to provide any benefits. In this high mobility case we show that a linear precoding MIMO system with more antennas experiences the same performance as an open-loop MIMO system with fewer antennas.

KW - 802.16e

KW - WiMAX

KW - MIMO

KW - linear precoding

U2 - 10.1109/VETECS.2010.5494115

DO - 10.1109/VETECS.2010.5494115

M3 - Conference Contribution (Conference Proceeding)

SN - 9781424425181

SP - 1

EP - 5

BT - IEEE 71st Vehicular Technology Conference 2010 (VTC 2010-Spring), Taipei, Taiwan

PB - Institute of Electrical and Electronics Engineers (IEEE)

T2 - 71st Vehicular Technology Conference 2010 (VTC 2010-Spring)

Y2 - 1 May 2010

ER -

Mobile WiMAX: impact of mobility on the performance of limited feedback linear precoding

Abstract

Publication series

Conference

Bibliographical note

Keywords

Access to Document

Handle.net

Fingerprint

Cite this