Abstract

In this paper, we analyzed BER performance of the MC DS-CDMA system and evaluated the degree of performance improvement of the system caused by adopting turbo code recently receiving much attention due to its powerful coding capability. As a result of analysis, it was found that the MC DS-CDMA system without any powerful coding scheme can not serve voice quality $(BER : 10^{-3}$ regardless of the number of users and the value of $(BER : 10^{-3)$ in Rayleigh fading channel. On the other hand, it was found that the MC DS-CDMA system adopting turbo code for performance improvement, shows improved BER performance and can serve voice quality without regard to the number of users and the value of $(BER : 10^{-3)$ in the same channel. For example, when $(BER : 10^{-3)$ is l0dB and the number of users was 10, the MC DS-CDMA system adopting turbo code showed improved BER performance about $5\times10^{-3}$.

Keywords

• MC DS-CDMA;
• BER;
• Wireless;
• Turbo Code

File

Download PDF