Throughput analysis of STS-based CDMA system with variable spreading factor in non-frequency selective Rayleigh fading channel

Authors:
Vahideh Vakil;Hassan Aghaeinia
Affiliations:
Spread Spectrum Research Lab, Radio Communication Center of Excellence, Electrical Engineering Department, Amirkabir University of Technology, Iran;Spread Spectrum Research Lab, Radio Communication Center of Excellence, Electrical Engineering Department, Amirkabir University of Technology, Iran
Venue:
Computers and Electrical Engineering
Year:
2009

Citing 3
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Performance analysis of multirate MC-CDMA in Rayleigh-fading channels with delay power spectrum exceeding the guard interval

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Abstract

The throughput enhancement of space-time spreading (STS)-based code division multiple access (CDMA) system is investigated in this paper. Variable spreading factor (VSF) is utilized to improve the data throughput of the system in non-frequency selective Rayleigh fading channel. In this contribution, an analytical approach is proposed to compute a new expression for the bit error rate (BER) performance of the STS-based CDMA system against pre-despreading signal-to-noise-ratio (SNR) for different values of spreading factor. The other contribution of the paper is deriving a new analytical expression for the throughput enhancement of the VSF STS-based CDMA system in non-frequency selective Rayleigh fading channel. Simulation and analytical results demonstrate that using VSF method in STS-based CDMA system improves the throughput of the system by keeping the BER performance at a target level.