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In this paper, a multiuser communication technique based on the Discrete Fractional Fourier Transform (DFrFT) is discussed. Eigenvectors of the DFrFT transform matrix are used as user sequences, which are transmitted over a real adder channel. Compared to other transforms used in the same context, the advantage of using the DFrFT is that the sequences can be generated from a systematic procedure and the number of generated subspaces, which determines the maximum number of simultaneous users of a scheme, is arbitrary. After describing the basic idea of the authors' approach, they discuss some aspects related to its practical implementation and present preliminary simulation results.
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