Sammanfattning:
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This project is funded by the Swedish Research Council (Vetenskapsrådet) and focuses on multicarrier modulation, which is the physical-layer basis for almost all emerging and envisioned broadband communication systems. Like every signal, the multicarrier transmit signal uses the physical resources time, frequency and amplitude. Its poor confinement in amplitude has been recognized as peak-to-average power ratio problem. The weak confinement in frequency has been recognized as spectral egress. Traditionally, these shortcomings are seen as problems of the modulation method and have motivated efforts on algorithm design to mitigate their negative impact. Typically, research in the area has focused on improving the confinement in one dimension while tacitly ignoring penalties in the other resource dimensions. Realizing that signal properties in time, frequency and amplitude are connected, the goal of this project is to design the multicarrier transmit signal such that the amount of information is maximized under given constraints in each dimension. The project aims at unifying several approaches that implicitly aim at the same goal but have so far been viewed as independent techniques.
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