In this paper we demonstrate that in doubly-dispersive environments, a multicarrier (MC) system based on a fractional Fourier transform (FrFT) can achieve a better concentration of power near the main diagonal of the equivalent channel matrix compared to standard orthogonal frequency division multiplexing (OFDM). The resulting inter-symbol and inter-carrier interference in such a chirp- based MC system can therefore be suppressed with a reduced complexity equaliser. Simulations show that compared to an equalised OFDM system, the equalised FrFT-MC approach can either significantly reduce complexity or enhance performance in a time-varying environment.
|Number of pages||4|
|Publication status||Published - 17 Dec 2012|
|Event||9th IMA International Conference on Mathematics in Signal Processing - Birmingham, United Kingdom|
Duration: 17 Dec 2012 → 20 Dec 2012
|Conference||9th IMA International Conference on Mathematics in Signal Processing|
|Period||17/12/12 → 20/12/12|
- multicarrier modulation