Title :
A Novel Frequency-Domain Channel Parameters Estimation Method by Time-Domain Pilots Inserting for OFDM Systems
Author :
Chen, Tao ; Wang, Min ; Fang, Yong
Author_Institution :
Sch. of Commun. & Inf. Eng., Shanghai Univ., Shanghai
Abstract :
A novel least square (LS) estimation method for frequency-domain channel parameters is proposed for orthogonal frequency division multiplexing (OFDM) systems. It inserts character pilots with constant envelops in time domain to avoid influencing the peak-to-average power ratio (PAPR) of systems caused by the inserted pilots. Moreover, it improves the estimation accuracy significantly with much lower computing complexity by designing the appropriate character pilots and the pilot multiplex format. Simulation results have demonstrated that the proposed algorithm is more effective than the conventional LS method for practical applications.
Keywords :
OFDM modulation; channel estimation; least squares approximations; time-frequency analysis; OFDM system; computational complexity; frequency-domain channel parameter estimation; least square estimation method; orthogonal frequency division multiplexing; peak-to-average power ratio; time-domain pilot; Channel estimation; Frequency estimation; Intersymbol interference; OFDM; Optical scattering; Optical transmitters; Parameter estimation; Peak to average power ratio; Signal processing algorithms; Time domain analysis; Channel estimation; LS; OFDM; PAPR;
Conference_Titel :
Wireless Pervasive Computing, 2009. ISWPC 2009. 4th International Symposium on
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4244-2965-3
Electronic_ISBN :
978-1-4244-2966-0
DOI :
10.1109/ISWPC.2009.4800555
