ICTACT Journal on Communication Technology

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New Analysis Of Optimal Guard Interval For A MC-CDMA System


Affiliations
1 Kim Chaek University of Technology, Korea, Democratic People's Republic of
2 College of Information Engineering, Wonsan Jogunsil University of Technology, Korea, Democratic People's Republic of
     

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In MC-CDMA system, the guard interval (GI) generally is longer than the channel impulse response to mitigate inter symbol interference (ISI). But in this environment, SNR is decreased and BER is high. So, some approaches to determine the optimal GI length under SNR and BER constraints have been proposed. In this paper, we propose the new theoretical expression that can determine optimal guard interval based on modeling the channel uniform distributed exponential decay channel, when the system parameters such as RMS delay spread and the channel parameters as the number of sub-carriers are given for MC-CDMA system.

Keywords

Optimum Guard Interval, Multicarrier Code Division Multiple Access, Inter Symbol Interference, Root-Mean-Square Delay Spread.
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  • New Analysis Of Optimal Guard Interval For A MC-CDMA System

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Authors

Jong Sam Ri
Kim Chaek University of Technology, Korea, Democratic People's Republic of
Yong Chan Ri
College of Information Engineering, Wonsan Jogunsil University of Technology, Korea, Democratic People's Republic of

Abstract


In MC-CDMA system, the guard interval (GI) generally is longer than the channel impulse response to mitigate inter symbol interference (ISI). But in this environment, SNR is decreased and BER is high. So, some approaches to determine the optimal GI length under SNR and BER constraints have been proposed. In this paper, we propose the new theoretical expression that can determine optimal guard interval based on modeling the channel uniform distributed exponential decay channel, when the system parameters such as RMS delay spread and the channel parameters as the number of sub-carriers are given for MC-CDMA system.

Keywords


Optimum Guard Interval, Multicarrier Code Division Multiple Access, Inter Symbol Interference, Root-Mean-Square Delay Spread.

References