OFDM/OQAM with Hermitian Symmetry: Design and Performance for Baseband Communication

OFDM/OQAM is a special type of multi-carrier modulation that can be considered as an alternative to conventional OFDM with cyclic prefix (CP) for transmission over multi- path fading channels. Indeed, as it requires no guard interval, it has the advantage of a theoretical higher spectral efficiency. In this paper, we propose a new version of OFDM/OQAM named in short HS-OQAM, where HS means that an Hermitian Symmetry property is used to directly provide a modulated real-valued signal. We analyze the links between HS-OQAM to Wavelet OFDM (WOFDM) modulation and Wilson-based modulated filter banks. The performances of HS-OQAM are compared to the ones of CP-OFDM for the transmission over Power Line Communication (PLC) channels.