Implementation of pulse shaping techniques in MC CDMA system to reduce the PAPR

For the last few years Multi Carrier Code Division multiple Access (MC CDMA) has gained more attention towards the high data rate transmission through the multipath channels. Researchers are trying to improve the performance of MC CDMA system by mitigating its demerits. As it is a combination of CDMA and OFDM, it consist of a large number of independent subcarriers. The amplitude of such a signal can have high peak values. One of the main fundamental drawbacks of MC CDMA systems is its high peak-to-average-power ratio (PAPR). This paper presents a PAPR Reduction method for MC CDMA system with various Pulse Shaping Functions. The pulse shapes like Raised cosine pulse (RC) and Improved sine power pulse (ISP) are used for pulse shaping the MC CDMA system. The results like bit error rate (BER) performance and PAPR of the MC CDMA system with and without pulse shaping indicates that the MC CDMA system with pulse shaping is better than the normal MC CDMA system and the pulse shaping with ISP is better compared to raised cosine pulse. Simulations are done using MATLAB version R2010a.