TY - GEN
T1 - Performance evaluation of linear constellation precoded OFDM with linear equalizers in overestimated channels
AU - Toutounchian, Milad Amir
AU - Muhaidat, Sami
PY - 2010
Y1 - 2010
N2 - Linear constellation precoded orthogonal frequency division multiplexing (LCP-OFDM) requires a maximum like-lihood (ML) decoder to fully collect multipath diversity gain. However, the complexity of ML increases exponentially with the channel memory, signal constellation size, and the number of transmit/receive antennas. Therefore, linear equalizers are highly desirable. This paper mainly analyzes minimum-mean-square equalization for MMSE-LCP-OFDM systems. We further analyze the performance of linear zero-forcing ZF-LCP-OFDM equalizers. In particular, we show that MMSE-LCP-OFDM equalization provides a significant performance improvement in the so-called overestimated channels. Unlike MMSE-LCP-OFDM, our analysis demonstrates that the performance of ZF-LCP-OFDM is in fact worse in overestimated channels from low to medium SNR region. Simulation results are provided to corroborate the theoretical analysis.
AB - Linear constellation precoded orthogonal frequency division multiplexing (LCP-OFDM) requires a maximum like-lihood (ML) decoder to fully collect multipath diversity gain. However, the complexity of ML increases exponentially with the channel memory, signal constellation size, and the number of transmit/receive antennas. Therefore, linear equalizers are highly desirable. This paper mainly analyzes minimum-mean-square equalization for MMSE-LCP-OFDM systems. We further analyze the performance of linear zero-forcing ZF-LCP-OFDM equalizers. In particular, we show that MMSE-LCP-OFDM equalization provides a significant performance improvement in the so-called overestimated channels. Unlike MMSE-LCP-OFDM, our analysis demonstrates that the performance of ZF-LCP-OFDM is in fact worse in overestimated channels from low to medium SNR region. Simulation results are provided to corroborate the theoretical analysis.
UR - http://www.scopus.com/inward/record.url?scp=78751481039&partnerID=8YFLogxK
U2 - 10.1109/ICTC.2010.5674706
DO - 10.1109/ICTC.2010.5674706
M3 - Conference contribution
AN - SCOPUS:78751481039
SN - 9781424498062
T3 - 2010 International Conference on Information and Communication Technology Convergence, ICTC 2010
SP - 120
EP - 124
BT - 2010 International Conference on Information and Communication Technology Convergence, ICTC 2010
T2 - 2010 International Conference on Information and Communication Technology Convergence, ICTC 2010
Y2 - 17 November 2010 through 19 November 2010
ER -