TY - GEN
T1 - Complexity and performance of turbo equalization for OFDM systems in doubly selective channels
AU - Hyukjin, Chae
AU - Yohan, Kim
AU - Jun, Kyoung Lee
AU - Dong, Ku Kim
PY - 2007
Y1 - 2007
N2 - Time and frequency selective channels or doubly selective channels leads to inter-carrier interference(ICI) in orthogonal frequency division multiplexing (OFDM) systems. We investigate how effectively turbo equalization could reduce the complexity burden of frequency domain equalization in the presence of doubly selective fading channels. We split the frequency domain matrix into several small sub-matrices that contain significant channel information and combine the MMSE equalization and the MAP decoding for iterative structure based on sub-matrices of frequency domain channel matrix. Simulation results show how much complexity reduction the iterative method can offer with better BER performance than that of the non iteration method. The iterative method has 70% computational complexity reduction with achieving IdB performance improvement in our simulations.
AB - Time and frequency selective channels or doubly selective channels leads to inter-carrier interference(ICI) in orthogonal frequency division multiplexing (OFDM) systems. We investigate how effectively turbo equalization could reduce the complexity burden of frequency domain equalization in the presence of doubly selective fading channels. We split the frequency domain matrix into several small sub-matrices that contain significant channel information and combine the MMSE equalization and the MAP decoding for iterative structure based on sub-matrices of frequency domain channel matrix. Simulation results show how much complexity reduction the iterative method can offer with better BER performance than that of the non iteration method. The iterative method has 70% computational complexity reduction with achieving IdB performance improvement in our simulations.
UR - http://www.scopus.com/inward/record.url?scp=34547375837&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34547375837&partnerID=8YFLogxK
U2 - 10.1109/VETECS.2007.335
DO - 10.1109/VETECS.2007.335
M3 - Conference contribution
AN - SCOPUS:34547375837
SN - 1424402662
SN - 9781424402663
T3 - IEEE Vehicular Technology Conference
SP - 1608
EP - 1611
BT - 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring
T2 - 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring
Y2 - 22 April 2007 through 25 April 2007
ER -