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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Horlin, F. Bourdoux, A. Lopez-Estraviz, E. Van der Perre, L. |
| Copyright Year | 2007 |
| Description | Author affiliation: Univ. Libre de Bruxelles, Brussels (Horlin, F.) |
| Abstract | In order to meet the data rate and quality-of-service (QoS) requirements of the future cellular systems, new air interfaces are currently under development. In this paper, we compare two air interfaces of particular interest for the uplink: cyclic-prefix code-division multiple access (CP-CDMA) proposed in the literature as an evolution of direct-sequence code-division multiple access (DS-CDMA) because it enables the low complexity equalization of the multipath channel in the frequency domain, and single-carrier frequency-division multiple access (SC-FDMA), recently proposed in the long term evolution of the 3GPP standard because it enables the easy separation of the users in the frequency domain. We demonstrate analytically that SC-FDMA is a special case of CP-CDMA, in which the CDMA codes have been optimized to minimize the symbol estimation mean square error (MSE) under a constraint of received power. Numerical results show that SC-FDMA outperforms significantly CP-CDMA at high user loads. The transmit power necessary to fulfill the received power constraint is higher in case of SC-FDMA than in case of CP-CDMA when the carrier sub-sets are allocated randomly to the users, and lower when the carrier sub-sets are allocated in an optimized way. |
| Starting Page | 2803 |
| Ending Page | 2808 |
| File Size | 231650 |
| Page Count | 6 |
| File Format | |
| ISBN | 1424403537 |
| DOI | 10.1109/ICC.2007.466 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-06-24 |
| Publisher Place | UK |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Frequency division multiaccess Multiaccess communication Frequency domain analysis Constraint optimization Quality of service Direct-sequence code-division multiple access Multipath channels Long Term Evolution Code standards Estimation error |
| Content Type | Text |
| Resource Type | Article |
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