A novel adaptive wideband beamforming method is proposed, where beamforming is achieved by LMS based spacetime adaptive filtering algorithm. Conventional broadband beamforming requires desired signal to be incident from the broadside i.e. direction normal to the array. The new method overcome this constraint by make use of digital delay filters which compensate the delay of receiving data, so t...

DONG, YUHAN. MIMO Beamforming with Mutual Coupling, Limited Feedback and Coordination. (Under the direction of Dr. Brian L. Hughes). Multi-input, multi-output (MIMO) techniques use multiple antennas at both the transmitter and receiver to improve the performance of wireless communications systems over multipath fading channels. In recent years, MIMO techniques that employ transmit beamforming h...

In this paper different experiments conducted with the TerraSAR-X satellite for a demonstration of digital beamforming in elevation are shown for a spaceborne SAR system. Processing of the data and different options for digital beamforming are presented.

In millimeter massive MIMO systems, hybrid beamforming algorithms with fewer RF chain are widely applied as they can save power and cut down on hardware costs. Hybrid beamforming can be divided into two stages: analog beamforming in the RF domain usually implemented with phase shifters and digital beamforming in the baseband domain. Phase shifters have rms phase error and rms gain error which a...

This paper presents the design and development of the smart antenna system testbed (SATB). The SATB is developed based on using the novel L-probe fed inverted hybrid E-H (LIEH) microstrip patch element design arranged into 4×1 uniform linear array antenna. This paper reports the development of a software reconfigurable testbed for the implementation and evaluation of digital beamforming algorit...

The purpose of the phased array beamforming project [1], [2] is to develop a generic flexible efficient phased array receiver platform, using a mixed signal hardware/software-codesign approach. The results will be applicable to any radio (RF) system, but we will focus on satellite receiver (DVB-S) and radar applications. We will present a preliminary mapping of beamforming processing on a tiled...

In the context of array processing for speech and audio applications, linear beamforming has long been the approach of choice, for reasons including good performance, robustness and analytical simplicity. Nevertheless, various nonlinear techniques, typically based on the study of auditory scene analysis, have also been of interest. The class of techniques known as time-frequency (T-F) masking, ...

In multi-user (MU) downlink beamforming, a high spectral efficiency along with a low transmit power is achieved by separating multiple users in space rather than in time or frequency using spatially selective transmit beams. For streaming media applications, multi-group multicast (MGM) downlink beamforming is a promising approach to exploit the broadcasting property of the wireless medium to tr...

Digital beamformers are a means for separating a desired signal from interfering signals. This paper describes opportunities and constraints for application digital beamforming techniques and adaptive beamforming techniques in wireless communications.