TY - GEN
T1 - A comprehensive performance comparison of OFDM/TDM using MMSE-FDE and conventional OFDM
AU - Gacanin, Haris
AU - Adachi, Fumiyuki
PY - 2008/7/28
Y1 - 2008/7/28
N2 - Orthogonal frequency division multiplexing (OFDM) is currently under intense research for broadband wireless transmission due to its robustness against multipath fading. However, OFDM signals have a problem with high peak-to-average power ratio (PAPR) and thus, a power amplifier must be carefully manufactured to have a linear input-output characteristic or to have a large input power backoff. Recently, OFDM combined with time division multiplexing (OFDM/TDM) using minimum mean square error frequency domain equalization (MMSE-FDE) was proposed to improve the bit error rate (BER) performance of conventional OFDM while reducing the PAPR. In this paper, by extensive computer simulation, we present a comprehensive performance comparison between OFDM/TDM using MMSE-FDE and conventional OFDM over a frequency-selective fading channel. We discuss about the trade-off among the transmit peak-power efficiency, the spectrum splatter and the BER performance. Our results show that OFDM/TDM using MMSE-FDE achieves almost the same coded BER performance with a several decibels better peak-power efficiency than conventional OFDM, which is significant reduction of amplifier transmit-power backoff, but with a slight decrease in spectrum efficiency.
AB - Orthogonal frequency division multiplexing (OFDM) is currently under intense research for broadband wireless transmission due to its robustness against multipath fading. However, OFDM signals have a problem with high peak-to-average power ratio (PAPR) and thus, a power amplifier must be carefully manufactured to have a linear input-output characteristic or to have a large input power backoff. Recently, OFDM combined with time division multiplexing (OFDM/TDM) using minimum mean square error frequency domain equalization (MMSE-FDE) was proposed to improve the bit error rate (BER) performance of conventional OFDM while reducing the PAPR. In this paper, by extensive computer simulation, we present a comprehensive performance comparison between OFDM/TDM using MMSE-FDE and conventional OFDM over a frequency-selective fading channel. We discuss about the trade-off among the transmit peak-power efficiency, the spectrum splatter and the BER performance. Our results show that OFDM/TDM using MMSE-FDE achieves almost the same coded BER performance with a several decibels better peak-power efficiency than conventional OFDM, which is significant reduction of amplifier transmit-power backoff, but with a slight decrease in spectrum efficiency.
KW - Amplifier power efficiency
KW - BER
KW - FDE
KW - OFDM/TDM
KW - Power spectrum density
UR - http://www.scopus.com/inward/record.url?scp=47749119995&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=47749119995&partnerID=8YFLogxK
U2 - 10.1109/VETECS.2008.295
DO - 10.1109/VETECS.2008.295
M3 - Conference contribution
AN - SCOPUS:47749119995
SN - 9781424416455
T3 - IEEE Vehicular Technology Conference
SP - 1404
EP - 1408
BT - 2008 IEEE 67th Vehicular Technology Conference-Spring, VTC
T2 - 2008 IEEE 67th Vehicular Technology Conference-Spring, VTC
Y2 - 11 May 2008 through 14 May 2008
ER -