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A new channel estimation and demodulation algorithm based on discrete Flourier transform (DFT) and least-square (LS) algorithm in time domain for mobile OFDM systems is proposed. From the view that the Doppler spread is a band-limited signal, the band-limited DFT is employed to represent the Doppler Spread channel with discrete serial expansion coefficients. In this way, the resulting channel coefficients...
This paper presents an intact scheme of timing synchronization for Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) Ultra Wide Band (UWB) systems. Frame detection and coarse timing are implemented with the Maximum Correlation (MC) method based on the first-band information of the preamble. Fine timing is achieved with the Minimum Energy Ratio (MER) method based on the information of...
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