On the Uplink Performance of LAS-CDMA
On the Uplink Performance of LAS-CDMA
In this paper Large Area Synchronized (LAS)-CDMA is investigated, which exhibits a significantly better performance than the traditional random code based DS-CDMA system. Closed-form formulas are derived for characterizing the BER performance of LAS-CDMA as a function of the number of resolvable paths Lp, the maximum delay difference ?max and the number of users K when communicating over a Nakagami-m fading channel. Moreover, the limited number of available LAS codes having a certain interference free window width suggests that the employment of LAS-CDMA is beneficial in a low-user-load scenario, where a near-single-user performance can be achieved without a multiuser detector. In this paper Large Area Synchronized (LAS)-CDMA is investigated, which exhibits a significantly better performance than the traditional random code based DS-CDMA system. Closed-form formulas are derived for characterizing the BER performance of LASCDMA as a function of the number of resolvable paths Lp, the maximum delay difference ?max and the number of users K when communicating over a Nakagami-m fading channel. Moreover, the limited number of available LAS codes having a certain interference free window width suggests that the employment of LAS-CDMA is beneficial in a low-user-load scenario, where a near-single-user performance can be achieved without a multiuser detector. Index Terms—Code-division multiple-access, interference free window, LA codes, LS codes, LAS codes, Gaussian Approximation.
1187-1196
Wei, H.
c99f7f91-cfea-4292-8f88-6b184ff81446
Yang, L-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
May 2006
Wei, H.
c99f7f91-cfea-4292-8f88-6b184ff81446
Yang, L-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Wei, H., Yang, L-L. and Hanzo, L.
(2006)
On the Uplink Performance of LAS-CDMA.
IEEE Transactions on Wireless Communications, 5 (5), .
Abstract
In this paper Large Area Synchronized (LAS)-CDMA is investigated, which exhibits a significantly better performance than the traditional random code based DS-CDMA system. Closed-form formulas are derived for characterizing the BER performance of LAS-CDMA as a function of the number of resolvable paths Lp, the maximum delay difference ?max and the number of users K when communicating over a Nakagami-m fading channel. Moreover, the limited number of available LAS codes having a certain interference free window width suggests that the employment of LAS-CDMA is beneficial in a low-user-load scenario, where a near-single-user performance can be achieved without a multiuser detector. In this paper Large Area Synchronized (LAS)-CDMA is investigated, which exhibits a significantly better performance than the traditional random code based DS-CDMA system. Closed-form formulas are derived for characterizing the BER performance of LASCDMA as a function of the number of resolvable paths Lp, the maximum delay difference ?max and the number of users K when communicating over a Nakagami-m fading channel. Moreover, the limited number of available LAS codes having a certain interference free window width suggests that the employment of LAS-CDMA is beneficial in a low-user-load scenario, where a near-single-user performance can be achieved without a multiuser detector. Index Terms—Code-division multiple-access, interference free window, LA codes, LS codes, LAS codes, Gaussian Approximation.
More information
Published date: May 2006
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 262976
URI: http://eprints.soton.ac.uk/id/eprint/262976
PURE UUID: 149959da-f1c7-4f23-933d-d885d2d87905
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Date deposited: 18 Sep 2006
Last modified: 18 Mar 2024 02:49
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Author:
H. Wei
Author:
L-L. Yang
Author:
L. Hanzo
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