General Issues Multicarrier Signals: A Natural Enabler for Cognitive Positioning Systems*; Marco Luise; Francesca Zanier. Linearization of Transmitter and Receiver Nonlinearities in Optical OFDM Transmission; Henning Paul; Karl-Dirk Kammeyer. Multi-User OFDM based on Braided Convolutional Codes; Michael Lentmaier; Marcos Tavares; Kamil Zigangirov; Gerhard Fettweis. Interference Aware Subcarrier and Power Allocation in OFDMA based Cognitive Radio Networks*;...