TY - GEN
T1 - Performance of decision feedback equalizers in urban and indoor mobile channels
AU - Huang, Weifeng
AU - Rappaport, Theodore S.
AU - Feuerstein, Martin J.
N1 - Publisher Copyright:
© 1992 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.
PY - 1992
Y1 - 1992
N2 - This paper presents idealized computer simulation results of an equalizer using two-ray and measurement-based channel impulse response models. A decision feedback equalizer (DFE) with a recursive least squares (RLS) algorithm is used as the equalization scheme. The results show that adaptive equalization can significantly improve the bit-error-rate (BER) of a mobile system if the channel does not change too rapidly. The simulation shows that in a two-ray Rayleigh fading channel, If the delay of the second ray Is too small, then adaptive equalization will degrade the BER performance. The value of the delay at which the adaptive equalizer can improve the BER depends on the normalized Doppler frequency. Also, a mobile channel simulator is used to show how much the equalizer can Improve the BER in real world urban channels. The performance of adaptive equalization for indoor high data rate systems is abo evaluated. Finally, an equalization structure for n/4 DQPSK modulation is developed and simulation results are presented.
AB - This paper presents idealized computer simulation results of an equalizer using two-ray and measurement-based channel impulse response models. A decision feedback equalizer (DFE) with a recursive least squares (RLS) algorithm is used as the equalization scheme. The results show that adaptive equalization can significantly improve the bit-error-rate (BER) of a mobile system if the channel does not change too rapidly. The simulation shows that in a two-ray Rayleigh fading channel, If the delay of the second ray Is too small, then adaptive equalization will degrade the BER performance. The value of the delay at which the adaptive equalizer can improve the BER depends on the normalized Doppler frequency. Also, a mobile channel simulator is used to show how much the equalizer can Improve the BER in real world urban channels. The performance of adaptive equalization for indoor high data rate systems is abo evaluated. Finally, an equalization structure for n/4 DQPSK modulation is developed and simulation results are presented.
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U2 - 10.1109/VETEC.1992.245377
DO - 10.1109/VETEC.1992.245377
M3 - Conference contribution
AN - SCOPUS:33745977383
T3 - IEEE Vehicular Technology Conference
SP - 368
EP - 371
BT - Proceedings - IEEE Vehicular Technology Society, 42nd VTS Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 42nd IEEE Vehicular Technology Society Conference: Frontiers of Technology, VTS 1992
Y2 - 10 May 1992 through 13 May 1992
ER -