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A joint timing offset (TO) and frequency offset (FO) estimation method based on Radon-Wigner transform (RWT) is first proposed for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) systems. The result shows that the timing and frequency synchronization performance of the proposed method are both better than the Schmidl & Cox method and fractional Fourier transform (FrFT) algorithm...
We consider estimating the direction-of-arrival (DOA) in the presence of sensor array error. In the proposed method, a blind signal separation method, the joint approximation and diagonalization of eigenmatrices algorithm, is implemented to separate the signal vector and the mixing matrix consisting of the array manifold matrix and the sensor array error matrix. Based on a new mixing matrix and the...
In this paper, we propose a joint method of frequency offset estimation based on training symbol and virtual subcarriers for coherent optical orthogonal frequency division multiplexing(CO-OFDM) system. In the proposed method, the integer frequency offset is estimated through subtraction between the mode got form the first data subcarriers' position in OFDM symbols and the number of virtual subcarriers...
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