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Generation of the signal and noise subspaces is a critical problem in subspace-based algorithms for orthogonal frequency division multiplexing (OFDM) systems. Some special characteristics, such as virtual carriers (VCs), real symbols, and/or cyclic prefix (CP), can be exploited to construct the required noise subspace in conventional subspace approaches. In this paper, a blind channel estimation algorithm...
A subspace-based blind channel estimation algorithm for OFDM systems with the conjugate-symmetric property is proposed in this paper. In subspace-based algorithms, construction of the signal or noise subspace is an important issue. Different to other subspace-based approaches exploiting the signal or noise subspace from cyclic prefix, virtual subcarriers, or oversampling techniques, we develop a blind...
This paper presents a new receiver framework for the cyclic-prefix free (CP-free) MIMO-OFDM system, equipped with the space-time block codes (ST-BC), over time varying multipath channels. Usually, without CP in the OFDM system the inter-carrier interference (ICI) could not be removed, effectively, at the receiver, when the inter-symbol-interference (ISI) has to be taken into account. In this paper,...
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