It is now well known that employing channel adaptive signaling in wireless communication
systems can yield large improvements in almost any performance metric. Unfortunately …

As the theoretical foundations of multiple-antenna techniques evolve and as these multiple-
input multiple-output (MIMO) techniques become essential for providing high data rates in …

mmWave communications systems usually rely on analog or hybrid analog/digital
architectures and thus need a predefined codebook to perform beamforming. Traditional …

We consider multi-input multi-output (MIMO) transmit beamforming under the uniform
elemental power constraint. This is a nonconvex optimization problem, and it is usually …

We consider a MIMO broadcast channel where both the transmitter and receivers are
equipped with multiple antennas. Channel state information at the transmitter (CSIT) is …

The design of feedback channels in frequency division duplex (FDD) systems is a major
challenge because of the limited available feedback bits. We consider non-orthogonal …

Beamforming (or precoding) techniques have been widely adopted in modern MIMO OFDM
systems. Using beamforming can significantly improve the receive SNR of OFDM systems …

This paper considers the problem of beamforming in multiple-input multiple-output (MIMO)
wireless systems. Assuming perfect channel state information at the receiver, the choice of …

The beamforming vectors of an equal gain transmission (EGT) contains phase information
only and thereby enjoys several implementational advantages when compared to the …

Precoding codebook design for limited feedback MIMO systems is known to reduce to a
discretization problem on a Grassmann manifold. The case of two-antenna beamforming is …