Title :
Time-Varying Channel Estimation for OFDM Systems with Superimposed Training and Basis Expansion Model
Author :
Zhang, Han ; Gao, Shan ; Zhong, Qinghua ; Dai, Xianhua
Author_Institution :
Dept. Phys. & Telecommun. Eng., South China Normal Univ., Guangzhou, China
Abstract :
An approach of superimposed training (ST) aided time-varying (TV) channel estimation for Orthogonal Frequency Division Multiplexing (OFDM) systems is presented. By modeling the channel as complex exponential bases, channel estimation is adopted over multiple OFDM symbols by using a sequence of data-dependent ST signal. Simulations illustrate the proposed channel estimator achieves a satisfactory estimation performance under a wide range of Doppler shift.
Keywords :
Doppler shift; OFDM modulation; channel estimation; time-varying channels; Doppler shift range; OFDM system; ST; TV channel estimation; basis expansion model; channel modeling; complex exponential base; data-dependent ST signal; orthogonal frequency division multiplexing system; superimposed training; time-varying channel estimation; Channel estimation; Doppler effect; Estimation; Frequency estimation; OFDM; TV; Training;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing (WiCOM), 2011 7th International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6250-6
DOI :
10.1109/wicom.2011.6040058
