The MIMO system can meet the growing demand for higher capacity in wireless communication fields. So far, the authors have reported that, based on channel measurements, uncoded performance of narrowband MIMO spatial multiplexing in indoor line-of-sight (LOS) environments generally outperforms that in non-LOS (NLOS) ones under the same transmit power condition. In space-frequency coded MIMO-OFDM...

Although numerous satellite-based soil moisture (SM) products can provide spatiotemporally continuous worldwide datasets, they can hardly be employed in characterizing fine-grained regional land surface processes, owing to their coarse spatial resolution. In this study, we proposed a machine-learning-based method to enhance SM spatial accuracy and improve the availability of SM data. Four machi...

LiFi or networked optical wireless communication is likely to play an important role in offloading mobile data traffic from radio into the spectrum. As number of Internet Things (IoT) devices growing, RF spectrum becomes a rare resource. Imaging IoT sensors like cameras, ultrasonic devices, and Lidars have real-time requirements, need high-capacity uplink, operate environments that cause are se...

Statistical multiplexing (SM) is a useful technique for transmitting multiple video streams over a channel while satisfying multiple simultaneous bandwidth and quality related constraints. Design of efficient SM algorithms is based on Rate and Distortion (R-D) information extracted from successive encoded frames. Good R-D models usually take into account inter-frame dependencies specified in te...

Multiple-input multiple-output (MIMO) wireless systems use antenna arrays at both the transmitter and receiver to achieve high spectral efficiency. Low-complexity detection is essential for the implementation of MIMO systems. In this thesis, a symbol detector for wireless systems using space division multiple access (SDMA) and orthogonal frequency division multiplexing (OFDM) is derived. The de...

In LTE /LTE -advanced standards, the physical layer is mapped into multiple transmission modes(TM) and each TM should be dynamically selected depending on the time-varying MIMO channel. Besides the single antenna SISO transmission (TM1), multielement antenna (MIMO) technology such as Open Loop Spatial Multiplexing (OLSM) and Close Loop Spatial Multiplexing (CLSM) transmission are also specified...

In this paper, a cooperative and hierarchical wireless sensor network is considered. By allowing sensor nodes in close proximity to cooperate in transmission, and by introducing a powerful mobile agent equipped with an antenna array to collect data, a virtual MIMO channel can be formed, on which recent advances in MIMO technologies can be applied. Analysis in the wideband regime reveals that, w...

Spatial modulation (SM) is a recently developed transmission technique that uses multiple antennas. The concept of SM is extended to both the space and time dimensions to provide a general shift-keying framework. A new modulation scheme called Differential STSK (DSTSK) scheme, assisted by the Cayley unitary transform is proposed to OFDM aided Multiple Input Multiple Output (MIMO) Communication ...

In this paper we introduce a continuous representation of multi-antenna (MIMO) fading channels that reveals the effect of array parameters and scattering characteristics on channel degrees of freedom and capacity. It is shown that the intrinsic degrees of freedom in the scattering environment provide an upper bound on the rank of the MIMO channel matrix (and hence the spatial multiplexing gain)...

A recent result of Zheng and Tse states that over a quasi-static channel, there exists a fundamental tradeoff, referred to as the diversity-multiplexing gain (D-MG) tradeoff, between the spatial multiplexing gain and the diversity gain that can be simultaneously achieved by a space-time (ST) block code. This tradeoff is precisely known in the case of i.i.d. Rayleigh-fading, for T ≥ nt + nr − 1 ...