Effect of Diversity and Filtering on the Performance of Wavelet Packets Base Multicarrier Multicode CDMA System

Abstract

In Wavelet Packets Based Multicarrier Multicode CDMA system, the multicode (MCD) part ensures the transmission for high speed and flexible data rate, the multicarrier (MC) part ensures the flexibility of handling multiple data rates, and wavelet packets modulation technique contributes to the mitigation of the interference problems. The CDMA system can suppress a given amount of interference. In this paper, the receiver employs suppression filter (SF) to mitigate the effect of narrow-band jammer interference and diversity techniques to reduce multiple access interference. The framework for the system and the performance evaluation are presented in terms of bit error rate (BER) over a Nakagami fading channel. Also, we investigate how the performance is influenced by various parameters, such as the number of taps of the SF, the ratio of narrow-band interference bandwidth to the spread-spectrum bandwidth, the diversity order, the fading parameter and so on. Finally, the performance of the system is compared with the performance Sinusoidal (Sin) based MC/MCD CDMA system.

Complete solutions for the outage probability of maximal ratio combining diversity on Nakagami‐ m fading channels with unequal power branches valid for integer m

“…Although this expression is so complicated as to have precluded its inclusion in undergraduate and graduate level books, this expression has stood the test of time in the research literature, being cited over 258 times in Google Scholar, making it fair to state that it is the best known solution for the desired SNR density. Examples of recent applications of the expression in [12] include [12][13][14][15][16][17][18][19]. A second solution (different expression) for the density of MRC operating on unequal power Nakagami fading channels was published by Karagiannidis et al [12].…”