Abstract:In this paper, a Cramér-Rao bound (CRB) for blind channel estimation in cyclic prefixed MIMO-OFDM systems is derived. The derived bound is valid for arbitrary numbers of transmit antennas, received antennas, and received symbols available for blind channel estimation, and serve as a benchmark of performances for several recently reported subspace-based algorithms. Computer simulations are conducted to compare these algorithms with the derived bound. The results show that there are still rooms for improvement f… Show more
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