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We are concerned with the performance of MIMO-OFDM receiver operating in a doubly selective fading channel (also called time-varying multipath fading channel). Both linear and nonlinear detection schemes are considered. In particular, frequency-domain oversampling (FDO) is employed at the receiver to take advantage of the channel diversity inherent to multipath fading channels. Simulation results...
A subspace blind channel estimation scheme is proposed for multicarrier(MC)-CDMA systems using multiple antennas. To obtain noise subspace that is essential for subspace blind channel estimation, frequency-domain over-sampling (FDO) is employed at the receiver side. A unique feature of this scheme is that it is applicable to general MC-CDMA systems without any constraint on the numbers of antennas...
By using frequency-domain oversampling at the receiver, we propose a novel blind channel estimation scheme for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Specifically, a subspace blind channel estimation approach is developed, based only on second-order statistics of the received signal. The estimated MIMO channel is nicely determined by Nt minimum...
The constellation design for differential space-time modulation usually requires to construct L (constellation size) unitary matrices making the design complexity increasing rapidly with L. In this correspondence, we propose a new construction technique, which exploits the rotational invariance of unitary matrices and the property of MPSK modulation. The proposed constellations are derivable from...
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