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This paper proposes a novel doubly selective channel estimation scheme for MIMO-OFDM systems with both time- and frequency-domain training (TFDT) based on structured compressive sensing (SCS). The characteristics of the doubly selective channel is considered in three dimensions, i.e., sample-domain, tap-domain, and antenna-domain. The tap-domain channel impulse responses (CIRs) are jointly sparse,...
This paper deals with semi-blind channel estimation Cramèr Rao Bound (CRB) performance of a multiuser Multiple-Input Multiple-Output Orthogonal Frequency-Division Multiplexing (MIMO-OFDM) wireless communication system in the uplink transmission. The first contribution shows that the Carrier Frequency Offset (CFO) impacts advantageously the CRB of the semi-blind channel estimation mainly due to the...
In this paper, a spectral efficient channel estimation scheme is proposed for spatial-correlated sparse massive multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems with superimposed time-frequency training sequences (TSs) based on basis expansion model (BEM). This scheme first relies on the identical time-domain TS to acquire the partial channel common support,...
This paper presents an efficient channel estimation scheme of the non-orthogonal multiple access system which named CDMA-FMT in 5G wireless networks. The proposed channel estimation scheme is theoretically analyzed based on the equivalent sub-band channel model. Moreover, the simulation results show that, by using the proposed channel estimation scheme, the BLER performance of the CDMA-FMT system...
Visible Light Communications (VLC) is considered one of the most promising technologies to guarantee the future demand of user wireless data rate. Since a DC value is needed for illumination, Direct Current-biased Optical Orthogonal Frequency Division Multiplexing (DCO-OFDM) is adopted as modulation technique in these environments. Channel estimation in VLC is quite different from the conventional...
We have been studying cooperative distributed antenna transmission (CDAT) as a promising technique for realizing the 5th generation (5G) high-speed mobile communications. Assuming time division duplex (TDD), the macro-cell base station (MBS) and the user equipments (UEs) conduct the channel estimation independently to obtain the shared channel state information (CSI). In this paper, we introduce a...
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