TY - JOUR
T1 - Reduced-complexity iterative equalization for severe time-dispersive MIMO channels
AU - Ahmed, Sajid
AU - Ratnarajah, T.
AU - Sellathurai, Mathini
AU - Cowan, Colin F. N.
N1 - Funding Information:
Manuscript received July 27, 2006; revised February 14, 2007 and May 7, 2007. This work was supported by the U.K. Engineering and Physical Sciences Research Council under Grant EP/D07827X/1. This paper was presented in part at the European Signal Processing Conference, Florence, Italy, September 4–8, 2006. The review of this paper was coordinated by Dr. A. Ghrayeb.
PY - 2008/1
Y1 - 2008/1
N2 - In this paper, a reduced-complexity soft-interference-cancellation minimum mean-square-error (SIC-MMSE) iterative equalization method for severe time-dispersive multiple-input-multiple-output (MIMO) channels is proposed. To mitigate the severe time dispersiveness of the channel, a single carrier with cyclic prefix is employed, and the equalization is performed in the frequency domain. This simplifies the challenging problem of equalization in MIMO channels due to both the intersymbol interference (ISI) and the coantenna interference (CAI). The proposed iterative algorithm works in two stages. The first stage estimates the transmitted frequency-domain symbols using a low-complexity SIC-MMSE equalizer. The second stage converts the estimated frequency-domain symbols in the time domain and finds their means and variances to incorporate in the SIC-MMSE equalizer in the next iteration. Simulation results show the bit-/symbol-error-rate performance of the SIC-MMSE equalizer, with and without coding, for various modulation schemes.
AB - In this paper, a reduced-complexity soft-interference-cancellation minimum mean-square-error (SIC-MMSE) iterative equalization method for severe time-dispersive multiple-input-multiple-output (MIMO) channels is proposed. To mitigate the severe time dispersiveness of the channel, a single carrier with cyclic prefix is employed, and the equalization is performed in the frequency domain. This simplifies the challenging problem of equalization in MIMO channels due to both the intersymbol interference (ISI) and the coantenna interference (CAI). The proposed iterative algorithm works in two stages. The first stage estimates the transmitted frequency-domain symbols using a low-complexity SIC-MMSE equalizer. The second stage converts the estimated frequency-domain symbols in the time domain and finds their means and variances to incorporate in the SIC-MMSE equalizer in the next iteration. Simulation results show the bit-/symbol-error-rate performance of the SIC-MMSE equalizer, with and without coding, for various modulation schemes.
KW - Frequency-domain equalizer
KW - Frequency-selective multiple-input-multiple-output (MIMO) channels
KW - Iterative receiver
KW - Single carrier with cyclic prefix (SCCP)
UR - http://www.scopus.com/inward/record.url?scp=39549102260&partnerID=8YFLogxK
U2 - 10.1109/TVT.2007.905395
DO - 10.1109/TVT.2007.905395
M3 - Article
AN - SCOPUS:39549102260
SN - 0018-9545
VL - 57
SP - 594
EP - 600
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 1
ER -