Recently, there has been great interest in 3-D ultrasound imaging, but power constraints have precluded practical implementation of high-resolution and highframe-rate 3-D ultrasound in handheld imaging platforms. In this paper, we propose a separable beamforming procedure for both 3-D synthetic aperture and plane wave systems that drastically reduces computational and hence power requirements. ...

This paper proposes a vertical beamforming concept to a cellular network employing Fractional Frequency Reuse technique including with cell sectorization. Two different beams are utilized in cell-center and cell-edge, separately. The proposed concept is validated through computer simulation in term of SINR and channel capacity. Also, comparison when utilizing horizontal and vertical beam format...

The transmitted symbol is affected by the channel noise and diversity is an efficient method to reduce the noise and interference. Recently, the channel noise is cancelled by using a novel beamforming technique, where the transmitted symbols are weighted and the same weighting vectors are used at the receiver. In this paper, the authors use the proposed beamforming technique in antenna diversit...

We present a two stage blind source separation (BSS) algorithm for robot audition. The algorithm is based on a beamforming preprocessing and a BSS algorithm using a sparsity separation criterion. Before the BSS step, we filter the sensors outputs by beamforming filters to reduce the reverberation and the environmental noise. As we are in a robot audition context, the manifold of the sensor arra...

Secondary receivers in Multiple-Input Multiple-Output (MIMO) Cognitive Radio (CR) networks combat interference from primary transmitters while equipped with whitening filters. However, when the MIMO secondary users are employing Radio Frequency (RF) beam-forming networks at the transmitter/ receiver front ends to improve the MIMO transmission performance, the whitening filters cannot perform in...

Frequency invariant beamforming is array processing in which the spatial response remains constant (with respect to frequency) within a wide frequency band of interest. In this paper we present a new algorithm for adaptive broadband beamforming which solves a minimum variance beamforming problem, with a structural frequency invariant beampattern constraint. This constraint allows us to reduce t...

A near eld beamforming array is investigated for use in a radar system that is part of a hybrid elastic electromagnetic technique for detecting land mines The radar is used to measure the displacement of the surface of the earth and land mines due to elastic waves in the earth The beamforming array is used to obtain a su ciently small spatial resolution for the measurement of the displacement w...

Downlink beamforming is a promising technique €or DS-CDMA systems with multimedia services to eflectively reduce strong interferences induced by high data rate users. In this paper, we first proposed a new downlink beamforming algorithm which converts downlink beamforming problem to a virtual uplink one and takes into account of the data rate information of all users. Since the main complexity ...

The use of beamforming and power control, combined or separately, has advantages and disadvantages, depending on the application. The combined use of beamforming and power control has been shown to be highly effective in applications involving the suppression of interference signals from different sources. However, it is necessary to identify efficient methodologies for the combined operation o...

Computationally intense spatial filtering, called beamforming, is central to acoustic imaging. Typically, in order to achieve an update rate similar to slow scan television, beamforming must operate in real-time, which leads to massive parallel processing. This paper surveys appropriate work in the field of synchronous data flow (SDF) as applied to the beamforming problem and defines the object...