Multiple access IFDMA and single carrier with frequency domain equalization SC/FDE: IFDMA-SC/FDE with low signal fluctuation

The Interleaved frequency division multiple access (IFDMA), a multicarrier modulation is treated in this paper as an orthogonal multiple access technique and hence applied to the single carrier with frequency domain equalization (SC/FDE) technique. A new dimension for treating the multipath propagation problems is therefore explored by combining SC/FDE and multiusers transmission technique IFDMA. SC/FDE, a broadband technique is effective and robust in frequency selective fading channels. Further, a kind of constant envelope signals that reduce the impact of power stages non-linearity effects, become obtainable and outperform OFDM technique. SC/FDE proposes block transmission and naturally suits the IFDMA that also implies the block transmission. The combined techniques can apply the equalization in frequency domain which advantageously replaces the time domain equalization.