TY - GEN
T1 - Low-complexity LSMR equalisation of FrFT-based multicarrier systems in doubly dispersive channels
AU - Solyman, Ahmed A.A.
AU - Weiss, Stephan
AU - Soraghan, John J.
PY - 2012/2/13
Y1 - 2012/2/13
N2 - The discrete fractional Fourier transform (FrFT) has been suggested to enhance performance over DFT-based multicarrier systems when transmitting over doubly-dispersive channels. In this paper, we propose a novel low-complexity equaliser for inter-symbol and inter-carrier interference arising in such multicarrier transmission system. Due to a lower spreading in the FrFT-domain compared to the DFTchannel matrix as compared to the DFT domain, the equaliser can approximate the fractional-domain channel matrix by a band matrix. Further, we utilise the least squares minres (LSMR) algorithm in the calculation of the equalisation, which exhibits attractive numerical properties and low complexity. Simulation results demonstrate the superior performance of the proposed LSMR equaliser over benchmark schemes.
AB - The discrete fractional Fourier transform (FrFT) has been suggested to enhance performance over DFT-based multicarrier systems when transmitting over doubly-dispersive channels. In this paper, we propose a novel low-complexity equaliser for inter-symbol and inter-carrier interference arising in such multicarrier transmission system. Due to a lower spreading in the FrFT-domain compared to the DFTchannel matrix as compared to the DFT domain, the equaliser can approximate the fractional-domain channel matrix by a band matrix. Further, we utilise the least squares minres (LSMR) algorithm in the calculation of the equalisation, which exhibits attractive numerical properties and low complexity. Simulation results demonstrate the superior performance of the proposed LSMR equaliser over benchmark schemes.
KW - doubly dispersive channel
KW - fractional Fourier Transformation
KW - low complexity equalisation
KW - Multicarrier transmission
U2 - 10.1109/ISSPIT.2011.6151606
DO - 10.1109/ISSPIT.2011.6151606
M3 - Conference contribution
AN - SCOPUS:84857839066
SN - 9781467307529
T3 - IEEE International Symposium on Signal Processing and Information Technology, ISSPIT 2011
SP - 461
EP - 465
BT - IEEE International Symposium on Signal Processing and Information Technology, ISSPIT 2011
T2 - 11th IEEE International Symposium on Signal Processing and Information Technology, ISSPIT 2011
Y2 - 14 December 2011 through 17 December 2011
ER -