Interference Analysis for Multi-Carrier Systems Over Fast-Fading Multipath Channels

In this paper, performance analysis for Multi-Carrier transmission using different pulse-shape-banks is provided for various scenarios. The pulse-shape-banks are selected based on different optimization criteria. These criteria fit into a range of considered scenarios requiring robustness against time dispersion or/and frequency dispersion while transmitting over a multi-path Rayleigh channel. Performance is provided in terms of interference power level versus normalized Doppler spread for various delay profiles while using a conventional correlator-based receiver. The interference localization properties of the pulse shapes and their importance are also discussed. When Doppler spread is negligible, it is shown that the Cyclic-Prefixed Orthogonal Frequency Division Multiplexing (CP-OFDM) has the best performance in terms of interference level. However, when the channel has a considerable variation, the Out of Band Energy (OBE) pulse shape appears to have better performance. For extreme-case scenarios, where the channel is significantly affected by both delay and Doppler spreads, we recommended to consider the interference localization properties of the pulse shapes instead of interference level.