Efficient Wavelet Packet Modulation for Wireless Communication

Abstract

Based on the good time-frequency localization of the pulse shaping, it is possible to build a multicarrier modulation that reduces both narrowband interferences and multipath channel interferences. In this paper, the given solution is based on wavelet theory: wavelet packet based multicarrier modulation is introduced and compared to the useful orthogonal frequency domain multiplexing (OFDM) modulation in a wireless environment with narrowband interferences and multipath channel interferences. Simulations show that the use of wavelet is more robust to narrowband interferences than the OFDM modulation. For multi- path transmission, simulations show that the use of complex wavelet outperforms the use of real one and outperforms the OFDM modulation when the cyclic prefix technique is not used.