Title :
An iterative rsse equalizer for suppressing phase noise effects in OFDM systems
Author :
Kutz, Gideon ; Raphaeli, Dan ; Wittenberg, Ilan
Author_Institution :
Fac. of Eng. - Syst., Tel Aviv Univ., Tel Aviv, Israel
Abstract :
In this paper we introduce a novel demodulation scheme for OFDM that jointly handles the effects of strong phase noise (both at the transmitter and receiver) and multipath channel. The basic principle is to model the effects of the phase noise and multipath channel as an FIR filter in the frequency domain with frequency varying taps. The proposed demodulation scheme iterates between the filter estimation based on tentative decision on the transmitted symbols and symbols estimation with a frequency domain Reduced State Sequence Equalizer (RSSE) based on tentatively estimated filter. Simulation results show excellent performance of the proposed scheme compared to previously proposed techniques.
Keywords :
FIR filters; OFDM modulation; equalisers; interference suppression; multipath channels; FIR filter; OFDM systems; demodulation scheme; filter estimation; frequency domain; frequency varying taps; iterative RSSE equalizer; multipath channel; orthogonal frequency division multiplexing; phase noise suppression; reduced state sequence equalizer; tentative decision; Demodulation; Equalizers; Finite impulse response filter; Frequency domain analysis; Frequency estimation; Multipath channels; OFDM; Phase noise; State estimation; Transmitters; OFDM; maximum likelihood demodulation; phase noise;
Conference_Titel :
Electrical and Electronics Engineers in Israel, 2008. IEEEI 2008. IEEE 25th Convention of
Conference_Location :
Eilat
Print_ISBN :
978-1-4244-2481-8
Electronic_ISBN :
978-1-4244-2482-5
DOI :
10.1109/EEEI.2008.4736566
