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Effect Analysis of Timing Offsets for Asynchronous MC-CDMA Uplink Systems  

Ko, Kyun-Byoung (Control and Instrumentation Engineering at Chungju National University)
Woo, Choong-Chae (Electronics, Computer and Communication Engineering at Hanseo University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.47, no.8, 2010 , pp. 1-8 More about this Journal
Abstract
This paper models a symbol timing offset (STO) with respect to the guard period and the maximum access delay time for asynchronous multicarrier code division multiple access (MC-CDMA) uplink systems over frequency-selective multipath fading channels. Analytical derivation shows that STO causes desired signal power degradation and generates self-interferences. This effect of the STO on the average bit error rate (BER) and the effective signal-to-noise ratio (SNR) is evaluated. The approximated BER and the SNR loss caused by STO are then obtained as closed-form expressions. The tightness between the analytical result and the simulated one is verified for the different STOs and SNRs. Furthermore, the derived analytical results are verified via Monte Carlo simulations.
Keywords
asynchronous MC-CDMA; STO; guard period; maximum access delay time; SNR loss;
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Times Cited By KSCI : 2  (Citation Analysis)
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