Channel adaptive pulse shaping for OQAM-OFDM systems

Theory predicts a gain in transmission performance, when adapting pulse shapes of Offset Quadrature Amplitude Modulation (OQAM) Orthogonal Frequency Division Multiplexing (OFDM) systems to delay and Doppler spread in doubly-dispersive channels. Here we investigate the quantitative gains in reconstruction quality and bit error rate (BER) with respect to subcarrier spacing and channel properties. It is shown that it is possible to reduce the uncoded BER by a factor of more than two and the coded BER by a factor of at least four, utilizing only two different pulse shapes. The simulation results show that channel adaptive pulse shaping for OQAM-OFDM systems is a promising concept for future mobile communication systems.