Angular Beamforming Technique for MIMO Beamforming System

Downlink Transmit Beamforming for Multiuser - MIMO System

In multiuser multiple input multiple output (MUMIMO) downlink, the presence of multiuser cause the co-channel interference (CCI). The co-channel interference should be suppressed at the transmitter by the space precoding. Precoding is required to overcome it. The specifically challenge is to design transmit beamforming vectors for each user. Signal to leakage plus noise ratio (SLNR) method is o...

A Transmit Beamforming Technique for MIMO Cognitive Radios

In the present paper one of the main problems of cognitive radios, that is how to allow the secondary (cognitive) users to exploit the unused resources by primary users, is faced by introducing multiple antennas at the cognitive terminals. Under the assumption of perfect channel state information (CSI), a transmit beamforming scheme based on a linear algorithm is proposed for the exploitation o...

Optimum beamforming for MIMO multicasting

This paper investigates the transmit (Tx) beamforming design to maximize the throughput of a multiple-input multiple-output multicast channel, where common information is sent from the base station to K users simultaneously. This so-called max-min fair beamforming problem is known to be NP-hard. When the base station is equipped with two Tx antennas, we prove that the original complex-valued be...

Beamforming in MIMO Radar

A Random Beamforming technique in MIMO Broadcast Channels

In systems with a large number of transmit antennas M and a large number of users N, it is not always reasonable to assume that perfect channel knowledge can be made available to the transmitter. Since lack of channel knowledge does not lead to multi-user gains, it is therefore of interest to investigate transmission schemes that employ only partial channel state information (CSI). In this proj...