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Overview: Orthogonal Frequency Division Multiplexing (OFDM) is a spectrally efficient modulation scheme for high-bit-rate wireless communication over multipath fading channels. It is expected that OFDM will play a major role in next generation (B3G and 4G) mobile wireless systems. This research paper from University of Melbourne presents an optimal strategy for utilizing superimposed pilots for OFDM channel estimation using Wiener filtering. An algorithm is formulated to determine the optimal rectangular set of time-frequency samples for channel estimation for a given complexity.
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