Beamforming Design in Multiple-Input-Multiple-Output Symbiotic Radio Backscatter Systems

Grassmannian beamforming for multiple-input multiple-output wireless systems

Transmit beamforming and receive combining are simple methods for exploiting the significant diversity that is available in multiple-input and multiple-output (MIMO) wireless systems. Unfortunately, optimal performance requires either complete channel knowledge or knowledge of the optimal beamforming vector which are not always realizable in practice. In this correspondence, a quantized maximum...

Multiple-Input Multiple-Output Wireless Systems

The paper gives an overview of the multiple-input multiple-output (MIMO) systems and discusses their benefits enabling an increase in the system capacity and an increase of system reliability. The former is attained by signal multiplexing and the later by space encoding. The basic algorithms required for a proper operation of the MIMO systems, i.e. channel estimation, equalisation, optimal and ...

Modeling of Multiple-Input Multiple-Output Radio Propagation Channels

Coordinated multicell beamforming for massive multiple-input multiple-output systems based on uplink-downlink duality

This paper studies joint beamforming and power allocation for multicell multiuser multi-antenna systems with the objective of maximising the minimum signal-to-interference-plus-noise ratio (max–min SINR). The authors first consider developing an iterative algorithm to achieve the optimal performance by extending the uplink–downlink duality for finite-scale wireless communication systems. The so...

The Multiple - Input Multiple - Output Systems in Slow and Fast Varying Radio Channels

Multiple-input multiple-output (MIMO) systems are well known as a technique which allows increasing the throughput of a radio link and overcoming the effects of multipath fading. However, the integration of MIMO systems into the standards of wireless networks is slow, as there are numerous problems still unsolved. This PhD thesis deals with MIMO systems in slow and fast varying radio channels. ...