Small cell base stations (SBSs) and multiple antennas are seen as fundamental
technologies in the emergence of the next generation [ie, 5th generation (5G)] of cellular …

Compared with omni‐directional antennas, directional antennas have many merits, such as
lower interference, better spatial reuse, longer transmission range, and improved network …

Multi-User MIMO promises to increase the spectral efficiency of next generation wireless
systems and is currently being incorporated in future industry standards. Although a …

The demand for wireless bandwidth in indoor environments such as homes and offices
continues to increase rapidly. Although wireless technologies such as MIMO can reach link …

We are interested in estimating the angle of arrival of an RF signal by using commercial-off-
the-shelf (COTS) software-defined radios (SDRs). The proposed COTS-based approach has …

Radio tomographic imaging (RTI) enables device free localisation of people and objects in
many challenging environments and situations. Its basic principle is to detect the changes in …

We report a first-of-its-kind realization of directional transmission for smartphone-like mobile
devices using multiple passive directional antennas, supported by only one RF chain. The …

We consider the problem of efficient link-layer multicasting in wireless networks with
switched beamforming antennas. The inherent tradeoff between multicasting and …

Judicious control of indoor wireless coverage is crucial in built environments. It enhances
signal reception, reduces harmful interference, and raises the barrier for malicious attackers …

We present the design and implementation of ADAM, the first adaptive beamforming-based
multicast system and experimental framework for indoor wireless environments. ADAM …