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  5. The method of non-orthogonal frequency division multiplexing on the basic of the Hartley transform with quadrature amplitude modulation of the frequency carriers

The method of non-orthogonal frequency division multiplexing on the basic of the Hartley transform with quadrature amplitude modulation of the frequency carriers

V.I. Slyusar, K.A. Vasilyev
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In article the method of non-orthogonal frequency division multiplexing (N-OFDM) on the basic of the Hartley transform with quadrature amplitude modulation (QAM) of the frequency carriers is considered. Application of a real kernel of functions Hartley provides calculations without use of complex numbers and, as consequence, allows to reduce computing expenses, to simplify hardware realisation of method N-OFDM. Modulation of separate frequency carriers signals N-OFDM with use of QAM modulation raises throughput of communication channels.
Keywords: non-orthogonal frequency division multiplexing, Hartley transform, even and odd functions Hartley, pulse amplitude modulation, quadrature amplitude modulation, least-squares method