Downlink Space–Time Spreading Using Interference Rejection Codes
Downlink Space–Time Spreading Using Interference Rejection Codes
In this paper, the authors will investigate the performance of a loosely synchronized (LS) code-based space–time spreading (STS) scheme in comparison to that of classic Walsh code and pseudonoise code-based STS when communicating over dispersive Nakagami-m multipath channels. Closed-form formulas are derived for characterizing the bit-error-rate performance as a function of the number of resolvable paths L and the number of users K. Our numerical results suggest that the employment of LS code-based STS scheme is beneficial in a low-user-load and low-dispersion channel scenario, where a near-single-user performance can be achieved without a multiuser detector. Index Terms—Code-division multiple access (CDMA), Gaussian approximation, interference-free window (IFW), large area synchronized (LAS) codes, loosely synchronized (LS) codes, Nakagami-m fading.
1838-1847
Wei, H
406657e8-8423-46a8-94c3-2f48f2c06e6e
Yang, L-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
November 2006
Wei, H
406657e8-8423-46a8-94c3-2f48f2c06e6e
Yang, L-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Wei, H, Yang, L-L. and Hanzo, L
(2006)
Downlink Space–Time Spreading Using Interference Rejection Codes.
IEEE Transactions on Vehicular Technology, 55 (6), .
Abstract
In this paper, the authors will investigate the performance of a loosely synchronized (LS) code-based space–time spreading (STS) scheme in comparison to that of classic Walsh code and pseudonoise code-based STS when communicating over dispersive Nakagami-m multipath channels. Closed-form formulas are derived for characterizing the bit-error-rate performance as a function of the number of resolvable paths L and the number of users K. Our numerical results suggest that the employment of LS code-based STS scheme is beneficial in a low-user-load and low-dispersion channel scenario, where a near-single-user performance can be achieved without a multiuser detector. Index Terms—Code-division multiple access (CDMA), Gaussian approximation, interference-free window (IFW), large area synchronized (LAS) codes, loosely synchronized (LS) codes, Nakagami-m fading.
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Published date: November 2006
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 263354
URI: http://eprints.soton.ac.uk/id/eprint/263354
ISSN: 0018-9545
PURE UUID: c1b6d2c8-20f8-4622-886f-06ba509bf605
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Date deposited: 30 Jan 2007
Last modified: 18 Mar 2024 02:49
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Contributors
Author:
H Wei
Author:
L-L. Yang
Author:
L Hanzo
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