Abstract:

A new preamble structure is proposed, and the corresponding time and frequency synchronization algorithms are also presented for distributed multiple input multiple output orthogonal frequency division multiplexing (MIMOOFDM) systems. The coarse timing synchronization is accomplished by using the symmetric conjugate of the training symbol and the fine timing synchronization is accomplished by moving correlation. The fractional frequency offset is estimated by using the phase difference of the received signal, and the integral frequency offset is estimated by utilizing the good autocorrelation of the training symbol in frequency domain. The proposed preamble structure and synchronization algorithms have a satisfactory performance in distributed MIMOOFDM systems.