Title :
OFDM Channel Estimation in the Presence of Frequency Offset, IQ Imbalance and Phase Noise
Author :
Zou, Qiong ; Tanghat, A. ; Kim, K.Y. ; Sayed, Ali H.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
OFDM systems are susceptible to receiver impairments like frequency offset, IQ imbalance and phase noise. In this paper, OFDM channel estimation in the presence of these impairments is studied, and an iterative algorithm is proposed to jointly estimate the channel coefficients and the impairment parameters. It is shown by computer simulations that the algorithm performs close to its associated Cramer-Rao lower bound.
Keywords :
OFDM modulation; channel estimation; iterative methods; phase noise; Cramer-Rao lower bound; IQ imbalance; OFDM channel estimation; channel coefficients; frequency offset; iterative algorithm; phase noise; Channel estimation; Frequency estimation; Iterative algorithms; Local oscillators; Matrix converters; OFDM modulation; Phase estimation; Phase noise; Radio frequency; Time domain analysis; Channel estimation; IQ imbalance; OFDM; frequency offset; phase noise;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on
Print_ISBN :
1-4244-0727-3
DOI :
10.1109/ICASSP.2007.366525
