Beamforming for transmission in a network is, in several aspects, more difficult than
beamforming for reception. At first sight, the problems appear to be equivalent; because the …

The use of multiple antennas at base stations is a key component in the design of cellular
communication systems that can meet high-capacity demands in the downlink. Under ideal …

In this paper, we propose a new channel estimation scheme for TDD/FDD massive MIMO
systems by reconstructing (sometimes also referred to as covariance computing or …

In this paper, we propose an efficient downlink channel reconstruction scheme for a
frequency-division-duplex multi-antenna system by utilizing uplink channel state information …

We study a novel communication technique, ambient backscatter, that utilizes radio
frequency signals transmitted from an ambient source as both energy supply and …

Multiple-input multiple-output (MIMO) millimeter wave (mmWave) communication is a key
technology for next generation wireless networks. One of the consequences of utilizing a …

The downlink channel covariance matrix (DCCM) is of vital importance in determining
downlink beamforming weights for base station (BS) antenna array systems. For the …

This paper considers frequency division duplexing massive multiple-input multiple-output
systems in which the base station (BS) is equipped with either a uniform linear antenna …

We investigate the use of congestion control and joint optimal downlink beamforming, power
control, and access point allocation, in a multi-cell wireless communication system. The …

(57) ABSTRACT A method for processing signals from multiple receiving/transmitting
elements that de? ne an array antenna is dis closed. The method includes measuring uplink …