Title :
Optimum equalizer for OFDM systems with windowing
Author :
Arkhipov, Alexander
Author_Institution :
Inst. of Commun. & Navig., Michael Schnell German Aerosp. Center (DLR), Wessling, Germany
Abstract :
Addition of a postfix in orthogonal frequency division multiplexing (OFDM) symbol makes it possible to apply at the receiver a window different from the rectangular one and change the subcarrier spectrum. In doing so, inter-carrier interference (ICI) caused by frequency offset can be minimized. In this letter, we propose a minimum mean square error (MMSE) algorithm for the OFDM equalization which allows to utilize the energy invested into the postfix. As a result, the bit-error rate (BER) of an OFDM system can be improved.
Keywords :
OFDM modulation; equalisers; error statistics; intercarrier interference; least mean squares methods; OFDM systems; bit-error rate; inter-carrier interference; minimum mean square error algorithm; optimum equalizer; orthogonal frequency division multiplexing symbol; Bit error rate; Discrete Fourier transforms; Equalizers; Frequency domain analysis; Interference; Mean square error methods; Navigation; OFDM; Propagation losses; Signal design;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2009 IEEE 20th International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5122-7
Electronic_ISBN :
978-1-4244-5123-4
DOI :
10.1109/PIMRC.2009.5450323
