Title :
Joint Estimation of Channel Impulse Response and Carrier Frequency Offset for OFDM Systems
Author :
Liu, Yinsheng ; Tan, Zhenhui ; Wang, Haibo ; Kwak, Kyung Sup
Author_Institution :
Inst. of Broadband Wireless Mobile Commun., Beijing, China
Abstract :
In this paper, an order recursive method is proposed to solve the joint estimation of channel impulse response (CIR) and carrier frequency offset (CFO) for orthogonal frequency-division multiplexing (OFDM) transmission. As long as one can obtain the solution for Qth-order Taylor expansion, the solution for (Q + 1)th order can also be obtained via a simple recursive relation. The proposed recursive algorithm actually provides a method to handle any Qth-order Taylor expansion, instead of just the second order adopted in the technical literature. Significant improvement can be observed by adopting higher order approximation. Analytical mean-square-error (MSE) performance results are given, demonstrating the efficiency of the proposed algorithm.
Keywords :
OFDM modulation; channel estimation; frequency estimation; mean square error methods; recursive estimation; (Q + 1)th order; CFO; CIR; MSE performance; OFDM systems; OFDM transmission; Qth-order Taylor expansion; carrier frequency offset; channel impulse response; higher order approximation; joint estimation; mean-square-error performance; order recursive method; orthogonal frequency-division multiplexing transmission; recursive algorithm; recursive relation; Approximation methods; OFDM; Signal to noise ratio; Taylor series; Carrier frequency offset (CFO); channel impulse response (CIR); joint estimation; orthogonal frequency-division multiplexing (OFDM);
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2011.2173362
