TY - GEN
T1 - Nonlinear decision-feedback equalization for OFDM in a fast fading channel
AU - Gacanin, Haris
AU - Adachi, Fumiyuki
PY - 2009
Y1 - 2009
N2 - Orthogonal frequency division multiplexing (OFDM) has been adopted for several wireless network standards due to its robustness against multipath fading. Main drawback of OFDM is its high peak-to-average power ratio (PAPR) that causes a signal degradation in a peak-limiting (e.g., clipping) channel leading to a higher bit error rate (BER). At the receiver, the effect of peak-limitation can be removed to some extent to improve the system performance. In this paper, a combined decision-feedback equalization with clipping noise reduction technique is presented. An iterative equalization weight that minimizes the mean square error (MSE) with respect to residual clipping noise is derived. It is shown that the bit error rate (BER) performance of OFDM with proposed technique can be significantly improved in a peak-limited and frequency-selective fading channel.
AB - Orthogonal frequency division multiplexing (OFDM) has been adopted for several wireless network standards due to its robustness against multipath fading. Main drawback of OFDM is its high peak-to-average power ratio (PAPR) that causes a signal degradation in a peak-limiting (e.g., clipping) channel leading to a higher bit error rate (BER). At the receiver, the effect of peak-limitation can be removed to some extent to improve the system performance. In this paper, a combined decision-feedback equalization with clipping noise reduction technique is presented. An iterative equalization weight that minimizes the mean square error (MSE) with respect to residual clipping noise is derived. It is shown that the bit error rate (BER) performance of OFDM with proposed technique can be significantly improved in a peak-limited and frequency-selective fading channel.
KW - Clipping
KW - Decision-feedback equalization
KW - Fast fading
KW - OFDM
UR - http://www.scopus.com/inward/record.url?scp=77952804094&partnerID=8YFLogxK
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U2 - 10.1109/PIMRC.2009.5450360
DO - 10.1109/PIMRC.2009.5450360
M3 - Conference contribution
AN - SCOPUS:77952804094
SN - 9781424451234
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
SP - 2648
EP - 2652
BT - 2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009
Y2 - 13 September 2009 through 16 September 2009
ER -