This paper investigates the impact of applying the channel estimation method to an OFDM system quipped with rate 1 non-orthogonal space time block code for K transmit and 1 receive antenna. A new training pattern based on the Hadamard construction is designed that enables estimation of the K channels separately and thus reduces the effective noise variance in the estimate. The simulation result shows that using this low rank channel estimation in frequency selective slow fading channel yields very good BER performance comparable to the case when channel is known at the receiver.
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