Mean Spectral Efficiency Evaluation of the Uplink of MC-CDMA Cellular Systems

Autor: Henry Carvajal, Nathaly Orozco, C. de Almeida
Rok vydání: 2017
Předmět:
Interleaving
Computer science
Orthogonal frequency-division multiple access
Real-time computing
020101 civil engineering
Link adaptation
Data_CODINGANDINFORMATIONTHEORY
02 engineering and technology
Topology
Interference (wave propagation)
0201 civil engineering
Antenna array
symbols.namesake
Telecommunications link
0202 electrical engineering
electronic engineering
information engineering
Maximal-ratio combining
Electrical and Electronic Engineering
Radio resource management
Computer Science::Information Theory
Rayleigh fading
Channel allocation schemes
Code division multiple access
020206 networking & telecommunications
CDMA spectral efficiency
Spectral efficiency
Computer Science Applications
Cyclic prefix
Additive white Gaussian noise
Modulation
Cellular network
Bit error rate
symbols
Communication channel
Zdroj: Wireless Personal Communications. 96:4595-4611
ISSN: 1572-834X
0929-6212
DOI: 10.1007/s11277-017-4405-y
Popis: The mean spectral efficiency of the uplink of MC-CDMA cellular systems is evaluated. The complete system employs the multicarrier-code division multiple access (MC-CDMA) technique, a linear antenna array at the base stations, frequency interleaving, maximal ratio combining, adaptive modulation, perfect power control and a cyclic prefix large enough to eliminate the intersymbol and intercarrier interferences effects. This scenario assumes the presence of multiple access interference, co-channel interference, additive white Gaussian noise, exponential path-loss and slow and frequency selective Rayleigh fading channel. In this context, a procedure to calculate the mean spectral efficiency of the cellular network is proposed, which depends of the mean bit error rate, the channel reuse factor, the increase of bandwidth due to the cyclic prefix, the system load, the spreading factor, the cell radius and the modulation schemes. Results show that an unitary channel reuse factor is the most efficient way to use the spectrum, but it is critical in relation to the transmission rates. Also, as orthogonal frequency division multiple access technique is a particular case of MC-CDMA, the spectral efficiency of both techniques is compared.
Databáze: OpenAIRE
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