Title :
An iterative channel estimation method using superimposed training for IEEE 802.16E based OFDM systems
Author :
Nair, Jinesh P. ; Kumar, Ratnam V Raja
Author_Institution :
G.S.S.S.T, IIT Kharagpur, Kharagpur
Abstract :
An iterative least squares (LS) based channel estimation method for superimposed training (ST) based OFDM systems is proposed. The performance of the method is analyzed in terms of the mean squared estimation error (MSEE) and its impact on the bit error rate (BER) of the OFDM system is studied. A training sequence selection criterion that jointly optimizes the MSEE and the BER of the OFDM system also proposed. The effectiveness of the mathematical analysis presented is demonstrated through a comparison with the simulation studies. Also, the proposed scheme is applied to the IEEE 802.16e OFDM standard and a case is made with the required design of the sequence.
Keywords :
OFDM modulation; channel estimation; error statistics; iterative methods; least mean squares methods; sequences; BER; IEEE 802.16e OFDM standard; bit error rate; iterative channel estimation method; iterative least squares; mathematical analysis; mean squared estimation error; superimposed training sequence design; Analytical models; Bandwidth; Bit error rate; Channel estimation; Estimation error; Frequency estimation; Interference; Iterative methods; OFDM; Performance analysis; OFDM; channel estimation; superimposed training;
Conference_Titel :
Consumer Electronics, 2008. ISCE 2008. IEEE International Symposium on
Conference_Location :
Vilamoura
Print_ISBN :
978-1-4244-2422-1
Electronic_ISBN :
978-1-4244-2422-1
DOI :
10.1109/ISCE.2008.4559430
