Paper Info
Title
Performance Evaluation and ParameterOptimization of MC-CDMA
Abstract
The performance of multicarrier systems depends on the propagation channel behavior. The latter is subject to time and/or frequency selectivity. The designer has to select properly the guard interval and the number of carriers for a given system bandwidth to combat the channel dispersiveness. In this paper, we investigate the sensitivity of downlink multicarrier code-division multiple-access (MC-CDMA) performance to these parameters in different environments. We derive closed-form expressions of the useful and the different interference powers after maximum ratio combining and despreading. The optimum parameters correspond to the minimum of the signal-to-noise-ratio degradation. It turns out that the derivations in the paper of Steendam and Moeneclaey (IEEE Trans. Commun., 1999) that are restricted to the orthogonal frequency-division multiplexing (OFDM) system are a particular case of our results. Numerical evaluation of the analytical expres- sions reveals that the optimum parameters of the MC-CDMA and its corresponding OFDM system are similar and depend in the same way on the channel characteristics. We show in this paper that the load of the MC-CDMA system only has small influence on the optimization of the parameters. Therefore, from the point of view of parameter optimization, single-user transmission is sufficient to find the optimum parameters. Furthermore, as the op- timum parameters mainly depend on the channel characteristics, similar conclusions can be drawn for the uplink transmission.
Year
DOI
Venue
2007
10.1109/TVT.2007.895605
Vehicular Technology, IEEE Transactions
Keywords
Field
DocType
OFDM modulation,code division multiple access,wireless channels,MC-CDMA,OFDM,channel dispersiveness,guard interval,maximum ratio combining,multicarrier code-division multiple access,orthogonal frequency division multiplexing,parameter optimization,signal-to-noise-ratio degradation,Fading channels,multicarrier code-division multiple-access (MC-CDMA),orthogonal frequency-division multiplexing (OFDM),performance optimization
Computer science,Maximal-ratio combining,Communication channel,Electronic engineering,Bandwidth (signal processing),Guard interval,Multiplexing,Code division multiple access,Orthogonal frequency-division multiplexing,Telecommunications link
Journal
Volume
Issue
ISSN
56
3
0018-9545
Citations 
PageRank 
References 
3
0.41
7
Authors
2
Name
Order
Citations
PageRank
M. Guenach1647.37
Heidi Steendam242348.24