TY - JOUR
T1 - Low-complexity iterative method of equalization for single carrier with cyclic prefix in doubly selective channels
AU - Ahmed, Sajid
AU - Sellathurai, Mathini
AU - Lambotharan, Sangarapillai
AU - Chambers, Jonathon A.
PY - 2006/1
Y1 - 2006/1
N2 - Orthogonal frequency division multiplexing (OFDM)
requires an expensive linear amplifier at the transmitter due to
its high peak-to-average power ratio (PAPR). Single carrier with
cyclic prefix (SC-CP) is a closely related transmission scheme that
possesses most of the benefits of OFDM but does not have the PAPR
problem. Although in a multipath environment, SC-CP is very robust
to frequency-selective fading, it is sensitive to the time-selective
fading characteristics of the wireless channel that disturbs the
orthogonality of the channel matrix (CM) and increases the computational
complexity of the receiver. In this paper, we propose a
time-domain low-complexity iterative algorithm to compensate for
the effects of time selectivity of the channel that exploits the sparsity
present in the channel convolution matrix. Simulation results
show the superior performance of the proposed algorithm over the
standard linear minimum mean-square error (L-MMSE) equalizer
for SC-CP.
AB - Orthogonal frequency division multiplexing (OFDM)
requires an expensive linear amplifier at the transmitter due to
its high peak-to-average power ratio (PAPR). Single carrier with
cyclic prefix (SC-CP) is a closely related transmission scheme that
possesses most of the benefits of OFDM but does not have the PAPR
problem. Although in a multipath environment, SC-CP is very robust
to frequency-selective fading, it is sensitive to the time-selective
fading characteristics of the wireless channel that disturbs the
orthogonality of the channel matrix (CM) and increases the computational
complexity of the receiver. In this paper, we propose a
time-domain low-complexity iterative algorithm to compensate for
the effects of time selectivity of the channel that exploits the sparsity
present in the channel convolution matrix. Simulation results
show the superior performance of the proposed algorithm over the
standard linear minimum mean-square error (L-MMSE) equalizer
for SC-CP.
U2 - 10.1109/LSP.2005.860552
DO - 10.1109/LSP.2005.860552
M3 - Article
SN - 1070-9908
VL - 13
SP - 5
EP - 8
JO - IEEE Signal Processing Letters
JF - IEEE Signal Processing Letters
IS - 1
ER -