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The Journal of The Korea Institute of Intelligent Transport Systems Vol.7 No.5 pp.131-138
Multi-rate MC-CDMA시스템에서의 코드 간 간섭과 주파수 다이버시티와의 관계에 대한 연구
A Study on the Relation Between Frequency Diversity and Inter Code Interference in the Multi-rate MC-CDMA system
Abstract
The channel parameters such as RMS delay spread and Doppler frequency have an effect on performance of system. This paper investigates the effect between the Inter-Code Interference (ICI) and the frequency diversity gain in the multi-rate MC-CDMA system. The multi-rate MC-CDMA system has achieved the more variable data rate than the MC-CDMA and moreover it has the better performance than the OFDMA system, because it has achieved the frquency diversity gain. However, the frequency diversity gain and ICI have a trade-off relationship by using the spreading code. Therefore, we have improved the system performance by efficient choice of system parameters. In order to evaluate the effectiveness of the frequency diversify gain and the ICI effect, we perform simulations by altering the Doppler frequency and RMS delay spread.
