PERFORMANCE EVALUATION OF HHT BASED MC-CDMA SYSTEM, WAVELET PACKET BASED MC-CDMA SYSTEM WITH THE CONVENTIONAL MC-CDMA USING VARIOUS PERAMETERS

Abstract — Recently, the performance of conventional MC-CDMA system, orthogonal wavelet packet based MC-CDMA system (WP-MC-CDMA), and Huang Hilbert Transformation (HHT) based MC-CDMA system. Although, conventional MC-CDMA has already been discussed in the literature, and used as a benchmark for other two schemes. In addition, in the orthogonal wavelet packet based MC-CDMA system, we design a set of wavelet packets and used as the modulation waveforms in a multicarrier CDMA system. The WP-MC-CDMA shows their superiority over conventional MC-CDMA in terms of bit error rate (BER), and helps to mitigate the effects of interference and channel fading. Moreover, we also investigate the performance of Huang Hilbert Transformation based MC-CDMA. This scheme outperforms other two techniques, because this scheme is based on the knowledge of the instantaneous channel state information, or based on instantaneous imperfect channel estimates. Thus, by the knowledge of their channel gains or channel information, it can analyze the data more accurately. Hence, it is a more spectral efficient and high data rate transmission scheme compared to the conventional MC-CDMA and WP-MC-CDMA. Furthermore, a comparison is also made among all three schemes in terms of BER. Numerical and simulation results are presented to validate our proposed schemes