Results 81 to 90 of about 35,288,445 (167)

RFI Geolocation for Elevation Multichannel SAR System Using Beam Modulation

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Elevation multichannel synthetic aperture radar (SAR) with digital beamforming (DBF) capability can significantly enhance system gain by virtue of scan-on-receive (SCORE) technology, becoming the core system for achieving high resolution and wide swath ...
Zhen Chen, Zongsen Lv, Zhimin Zhang, Jianzhong Bi, Wei Wang, Huaitao Fan, Jinsong Qiu, Haonan Zhao   +7 more
doaj   +1 more source

Extrapolation-RELAX Estimator Based on Spectrum Partitioning for DOA Estimation of FMCW Radar

IEEE Access, 2019
This paper proposes an extrapolation-RELAX estimator based on spectrum partitioning (SP) for the direction of arrival (DOA) estimation of frequency-modulated continuous-wave (FMCW) radar.
Sangdong Kim, Bong-Seok Kim, Youngseok Jin, Jonghun Lee   +3 more
doaj   +1 more source

Adaptive beamforming assisted receiver

, 2007
Adaptive beamforming is capable of separating user signals transmitted on the same carrier frequency, and thus provides a practical means of supporting multiusers in a space-division multiple-access scenario.
Sheng Chen, Chen, Sheng
core  

Full-Duplex in Massive Multiple-Input Multiple-Output

IEEE Open Journal of Vehicular Technology
In-band full-duplex (FD) operation can double the spectral efficiency of massive multiple-input multiple-output (mMIMO) systems by allowing simultaneous transmission and reception over the same time/frequency slot. However, the main challenge encountered
Tho Le-Ngoc, Yuanzhe Gong, Mobeen Mahmood, Asil Koc, Robert Morawski, James Gary Griffiths, Philippe Guillemette, Jamal Zaid, Peiwei Wang   +8 more
doaj   +1 more source

Downlink MBER transmit beamforming design based on uplink MBER receive beamforming for rank-deficient TDD-SDMA systems

, 2010
The downlink minimum bit error rate (MBER) transmit beamforming is directly designed based on the uplink MBER receive beamforming solution for time division duplex (TDD) space-division multiple-access (SDMA) induced multiple-input multiple-output (MIMO ...
Yang, Lie-Liang, Chen, Sheng
core   +1 more source

A Prototype of 20GHz-Low-Complexity Digital Beamforming Transmitter Antenna Module for FR3 Band Using Direct Digital RF Technology in DSoF Configuration

IEEE Access
To miniaturize the digital beamforming (DBF) transmitter module, 1-bit bandpass delta-sigma (BP-DS) direct digital RF transmitter using delta-sigma-over-fiber (DSoF) link by 10GE SFP (Small Form Factor Pluggable) optical module has been studied. However,
Junhao Zhang, Koki Furuuchi, Noriharu Suematsu   +2 more
doaj   +1 more source

Spatially Corrected Digital Boundary File - 1996 Census Tracts

, 2017
This dataset is a spatially corrected version of the 1996 Canadian Census Tract Digital Boundary File (DBF). The original boundary file from Statistics Canada contained substantial spatial mismatch error compared to boundaries of other census years.
Allen, Jeff
core   +1 more source

Highly Integrated Low-Profile Multilayer Dual-Polarized Phased Array Antenna With Truncated Cavities for First Pulsed Bistatic L-Band Airborne SAR Sensor

IEEE Access
Synthetic Aperture Radar (SAR) has become, nowadays, one of the most important techniques in remote-sensing, and the increasing interest in Earth monitoring reinforces this trend. Next-generation SAR sensors will enhance the radar resolution capabilities
Diego Lorente, Markus Limbach, Bernd Gabler, Hector Esteban, Vicente E. Boria   +4 more
doaj   +1 more source

Adaptive minimum symbol error rate beamforming assisted detection for quadrature amplitude modulation

, 2008
—We consider beamforming assisted detection for multiple antenna aided multiuser systems that employ the bandwidth efficient quadrature amplitude modulation scheme.
Chen, Sheng, Livingstone, A., Hanzo, Lajos, Du, H.-Q.   +3 more
core   +1 more source

Digital beamforming using evolutionary optimization algorithms

, 2017
Digital Beamforming (DBF) is a critical and important technology in different kinds of areas such as modern radar and wireless communication systems. With DBF, multiple adaptive beams can be flexibly formed to enhance signals and suppress interferences ...
Yao, Qiang
core