Results 171 to 180 of about 35,290,266 (224)

Digital beamforming using a GPU

2009 IEEE International Conference on Acoustics, Speech and Signal Processing, 2009
In this paper we investigate the use of GPUs as digital beamformers. We specify a parallel implementation of a beamformer in time and frequency domain and measure its performance. We also give examples of the processing limits of NVIDIA Geforce 8800 GPU with respect to application parameters: number of sensors, sampling frequency, bandwidth, and number
Carl-Inge Colombo Nilsen, Ines Hafizovic
openaire   +1 more source

Tracking Targets using Digital Beamforming

2020 11th International Conference on Computing, Communication and Networking Technologies (ICCCNT), 2020
Anti aircraft systems have the objective of reducing or mitigating actions involving the detection and disabling of enemy aircraft reaching a significant area. These devices ought to be prepared to protect sensitive assets from high-altitude, high-speed enemy fighters assaults by working out accurate jet bombardments.
Abhishek Singh J, Paramananda Jena, Veena Devi S. V   +2 more
openaire   +1 more source

Initial Results of a Digital Radiometer with Digital Beamforming

IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium, 2008
In ESA's SMOS mission it is expected to improve the sea surface salinity retrieval using multi-angular information to correct for sea state effects. A multi-beam, digitally steered radiometer with polarization synthesis has been proposed for the first time as a part of the PAU instrument (Passive Advanced Unit for the ocean monitoring project).
Xavier Bosch-Lluis, Isaac Ramos-Pérez, Adriano Camps, Juan Fernando Marchan-Hernandez, Nereida Rodriguez-Alvarez, Enric Valencia, Miguel Angel Guerrero, Juan Manuel Nieto   +7 more
openaire   +2 more sources

Onboard digital beamforming: Algorithm and results

2014 IEEE Geoscience and Remote Sensing Symposium, 2014
A one-dimensional digital beam-forming (DBF) algorithm that is suitable for onboard real-time implementation is described in this article. A couple of techniques for generating a set of DBF coefficients will be also proposed to improve radar system performance such as signal-to-noise ratio (SNR) and/or range ambiguity (as a part of multiplicative noise
Hirad Ghaemi, Scott Shaffer, Scott Hensley   +2 more
openaire   +1 more source

Digital beamforming in ultrasound

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1992
The effects on array gain and sidelobe level of a practical digital beamforming (DBF) processor under the wideband conditions typical of ultrasound is discussed. It is concluded that a relatively simple design that replaces each analog delay line with a tapped, digital shift register (DSR) and a digital phase shift operation adjusted for midband will ...
openaire   +2 more sources

Communication on the move with satellite digital beamforming

MILCOM 2017 - 2017 IEEE Military Communications Conference (MILCOM), 2017
The main objective of this paper is to develop an efficient satellite digital beam-forming (BF) method that can provide user specific desirable signal-to-interference-plus-noise ratio (SINR) or data rate for each user in each zone. And a massive multiple-input multiple-output (MIMO) communications system model and its favorable channel propagation ...
Madhuprana Goswami, Hyuck M. Kwon, Khanh D. Pham, James Lyke, Thinh Nguyen   +4 more
openaire   +2 more sources

Digital Beamformer Antenna System

2007 16th IST Mobile and Wireless Communications Summit, 2007
Growing importance of smart antennas encouraged us to extend our research activity toward the development of a transmitting digital beamformer. In this paper we give an overview about our approach.
Levente Dudas, Peter Kovacs, Arpad Drozdy, Rudolf Seller   +3 more
openaire   +2 more sources

Potential of digital beamforming in bi- and multistatic SAR

IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477), 2004
Digital beamforming on receive is an innovative concept to gather additional information about the direction of scattered radar echoes during the acquisition of synthetic aperture radar (SAR) images. This additional information can be used to suppress range and azimuth ambiguities, to improve geometric and/or radiometric resolution, and to increase the
Krieger, Gerhard, Moreira, Alberto
openaire   +3 more sources

Assessment of Digital Beamforming Radar (DBF) and Spread Spectrum Digital Beamforming Radar (SSDBF)

2017 14th IEEE India Council International Conference (INDICON), 2017
Spread Spectrum Digital Beamforming (SSDBF), an innovative methodology which uses only one transceiver element overcomes the limitations of Conventional Digital Beamforming (CDBF) which uses multiple transceiver elements per antenna element. This is done by using the concept of Code Division Multiple Access (CDMA) multiplexing and de-multiplexing where
Nima Donka Tamang, Samarendra Nath Sur, Soumyasree Bera, Rabindranath Bera   +3 more
openaire   +1 more source

A novel approach to digital beamforming

The Journal of the Acoustical Society of America, 1978
For many sonar applications, the sensor outputs of a hydrophone array are sampled at a rate significantly higher than that required for waveform reconstruction when digital beamforming is used. The reason for this is that the number of synchronous, or ’’natural,’’ beampointing directions is proportional to the beamformer input rate. This paper presents
Roger G. Pridham, Ronald A. Mucci
openaire   +1 more source