Iranian Journal of Electrical and Electronic Engineering
Iran University of Science and Technology
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Volume 5, Issue 1 (March 2009)
IJEEE 2009, 5(1): 13-22 |
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V. Vakil, H. Aghaeinia. Throughput Improvement of STS-Based MC DS-CDMA System with Variable Spreading Factor. IJEEE 2009; 5 (1) :13-22
URL: http://ijeee.iust.ac.ir/article-1-111-en.html
URL: http://ijeee.iust.ac.ir/article-1-111-en.html
Abstract: (17247 Views)
The throughput enhancement of Space-Time Spreading (STS)-based Multicarrier
Direct Sequence Code Division Multiple Access (MC DS-CDMA) system is investigated in
this paper. Variable Spreading Factor (VSF) is utilized to improve the data throughput of
the system. In this contribution, an analytical approach is proposed to compute a new
expression for the Bit Error Rate (BER) performance of the STS-based MC DS-CDMA
system against pre-dispreading Signal-to-Noise Ratio (SNR) for different values of
spreading factor (SF). The other contribution of the paper is deriving a new closed form
expression for computing the throughput enhancement and the BER performance of the
VSF STS-based MC DS-CDMA system over Rayleigh fading channel. It is demonstrated
that using VSF method in STS-based MC DS-CDMA system improves the throughput of
the system by keeping the BER performance at the target level.
Keywords: Frequency Diversity , MC DS-CDMA , Space-Time Spreading , Spreading Factor , Throughput , Variable
Type of Study: Research Paper |
Received: 2009/03/16 | Accepted: 2009/03/16
Received: 2009/03/16 | Accepted: 2009/03/16
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