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Performance evaluation for asynchronous MC‐CDMA systems with a symbol timing offset
Author(s) -
Park Myonghee,
Ko Kyunbyoung
Publication year - 2009
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.974
Subject(s) - asynchronous communication , computer science , offset (computer science) , multipath propagation , frequency offset , bit error rate , code division multiple access , algorithm , fading , monte carlo method , carrier frequency offset , electronic engineering , orthogonal frequency division multiplexing , telecommunications , decoding methods , statistics , mathematics , channel (broadcasting) , engineering , programming language
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 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 using the semi‐analytical method, and the approximated BER and the SNR loss caused by STO are then obtained as closed‐form expressions. The tightness between the semi‐analytical result and the approximated one is verified for the different STOs and SNRs. Furthermore, the derived analytical results are verified via Monte Carlo simulations. Copyright © 2008 John Wiley & Sons, Ltd.