Measurements and Characteristics Analysis of 6 G Ultra-Massive MIMO Wireless Channels With Different Antenna Configurations and Scenarios

Optimal Transmit Antenna Selection for Massive MIMO Wiretap Channels

In this paper, we study the impacts of transmit antenna selection on the secrecy performance of massive MIMO systems. We consider a wiretap setting in which a fixed number of transmit antennas are selected and then confidential messages are transmitted over them to a multi-antenna legitimate receiver while being overheard by a multi-antenna eavesdropper. For this setup, we derive an accurate ap...

Capacity of MIMO Antenna Configurations for Spatial Channel and One Ring Model Scenarios

The capacity of Multiple Input Multiple Output (MIMO) systems has received much attention in recent years. This paper presents the simulated capacity results that could be achieved when side by side, echelon, collinear arrays are used in the MIMO systems. Here we investigate the MIMO system capacity using Spatial Channel Model (SCM), proposed by standardization bodies (3GPP-3GPP2) for third gen...

Capacity of MIMO Antenna Configurations for Spatial Channel and One Ring Model Scenarios

The capacity of Multiple Input Multiple Output (MIMO) systems has received much attention in recent years. This paper presents the simulated capacity results that could be achieved when side by side, echelon, collinear arrays are used in the MIMO systems. Here we investigate the MIMO system capacity using Spatial Channel Model (SCM), proposed by standardization bodies (3GPP-3GPP2) for third gen...

Wireless Communications over MIMO Channels Wireless Communications over MIMO Channels Applications to CDMA and Multiple Antenna Systems

Keyhole Effects in MIMO Wireless Channels - Measurements and Theory

It has been predicted theoretically that for some environments, the capacity of wireless MIMO systems can become very low even for uncorrelated signals; this effect has been termed keyhole or pinhole. In this paper the first unique measurements of this effect are presented. The measurements were performed in a controlled indoor environment that was designed to obtain a keyhole. We analyze limit...