Fundamentals of statistical signal processing: estimation theory
Fundamentals of statistical signal processing: estimation theory
OFDM for Wireless Multimedia Communications
OFDM for Wireless Multimedia Communications
Multi-Carrier and Spread Spectrum Systems
Multi-Carrier and Spread Spectrum Systems
Hi-index | 0.00 |
Recently, a frequency offset estimation method for orthogonal frequency division multiplexing (OFDM) has been proposed by Ren et al. (REA) [9]. The method can estimate an frequency offset for any training symbol structure. In the REA method, however, the integer frequency offset detection probability is rapidly varying according to the fractional frequency offset. In this paper, we first analyze the REA frequency offset estimation method, and define new detection criteria suitable for integer frequency offset detection. Then, we propose two efficient integer frequency offset estimation methods based on maximum likelihood method. The proposed methods overcome the drawback of the REA method, maintaining its advantage. The numerical results demonstrate that the proposed methods outperform the REA method in terms of the integer frequency offset detection probability.