TY - GEN
T1 - Doppler spread estimation for OFDM systems using Phase Difference method in Rayleigh fading channels
AU - Hadiansyah, Walid M.
AU - Suryani, Titiek
AU - Hendrantoro, Gamantyo
PY - 2012
Y1 - 2012
N2 - A method of estimating the Doppler spread in Orthogonal Frequency Division Multiplexing (OFDM) systems, known as Phase Difference method, is described. Channel estimation is performed in time domain over several OFDM symbols, which popularly performed in frequency domain. Channel frequency responses are affected by AWGN and propagation delay, and Rayleigh fading distributed. As a result, Doppler spread estimation is useful to improve Channel Impulse Response (CIR) performance. Furthermore, estimation bias is analyzed and error correcting modified method is advised to reduce estimation precision. From simulation results, it can be concluded that the greater Doppler spread is, the smaller number of pilot symbols are needed to form a circle on the constellation diagram, and conversely. The range of normalized Doppler shift that can be estimated is 0.0117-0.2997. For SNR = 10-30 dB, the error is ± 64.72%, whereas for SNR = 40-80 dB SNR, the error is ± 35.81%.
AB - A method of estimating the Doppler spread in Orthogonal Frequency Division Multiplexing (OFDM) systems, known as Phase Difference method, is described. Channel estimation is performed in time domain over several OFDM symbols, which popularly performed in frequency domain. Channel frequency responses are affected by AWGN and propagation delay, and Rayleigh fading distributed. As a result, Doppler spread estimation is useful to improve Channel Impulse Response (CIR) performance. Furthermore, estimation bias is analyzed and error correcting modified method is advised to reduce estimation precision. From simulation results, it can be concluded that the greater Doppler spread is, the smaller number of pilot symbols are needed to form a circle on the constellation diagram, and conversely. The range of normalized Doppler shift that can be estimated is 0.0117-0.2997. For SNR = 10-30 dB, the error is ± 64.72%, whereas for SNR = 40-80 dB SNR, the error is ± 35.81%.
KW - Doppler spread
KW - OFDM
KW - Phase Diference
KW - Rayleigh fading
KW - SNR
KW - channel estimation
UR - http://www.scopus.com/inward/record.url?scp=84872038101&partnerID=8YFLogxK
U2 - 10.1109/TSSA.2012.6366040
DO - 10.1109/TSSA.2012.6366040
M3 - Conference contribution
AN - SCOPUS:84872038101
SN - 9781467345507
T3 - 2012 7th International Conference on Telecommunication Systems, Services, and Applications, TSSA 2012
SP - 147
EP - 152
BT - 2012 7th International Conference on Telecommunication Systems, Services, and Applications, TSSA 2012
T2 - 2012 7th International Conference on Telecommunication Systems, Services, and Applications, TSSA 2012
Y2 - 30 October 2012 through 31 October 2012
ER -