Abstract:

A new non-orthogonal multi-carrier system is proposed. The CP-free system shows that its spectrum efficiency is better than that of the OFDM system with the same modulation. The frequency-domain maximum likelihood sequence detection based on the Ungerboeck metric is employed. In order to decrease the detection complexity, a square-root-Hanning window is adopted. The convolution constraint length among sub-carriers is only 2. The simulation results prove that the proposed system is effective and feasible in mobile channels.

Key words: non-orthogonal frequency division multiplexing, maximum likelihood sequence detection, wireless communications