Results 11 to 20 of about 323,225 (210)
Multi-Dimensional Physical-Layer Security via Digitally Mediated Space-Time Modulation. [PDF]
Adv Sci (Weinh)Digitally mediated space–time modulation moves radiation control beyond hardware‐bound switching. Multiple information‐bearing and masking waveforms are jointly synthesized at baseband and coherently coupled to simple periodic time modulation, enabling programmable, independently directed multi‐beam radiation without increasing switching‐state ...
Chen K +8 more
europepmc +2 more sources
Beam Index Modulation Wireless Communication With Analog Beamforming [PDF]
IEEE Transactions on Vehicular Technology, 2018 In this paper, we propose a new architecture and performance analysis for beam index modulation (BIM) wireless communication implemented with the aid of analog beamforming. The BIM concept is presented in order to extend and adapt the spatial modulation concept to sparse wireless communication channel environments.
Yuan Ding 0001 +4 more
openaire +5 more sources
DRL-Based Beam Split Alleviation for Movable Antenna-Enabled Near-Field Wideband Communications [PDF]
SensorsNear-field communication is regarded as a key enabling technology for future 6G wireless systems. However, when operating over wide bandwidths, the beam split effect arising from frequency-independent analog phase shifters leads to significant ...
Tingting Zhang +4 more
doaj +2 more sources
Analog Beamforming For Active Imaging Using Sparse Arrays [PDF]
2019 53rd Asilomar Conference on Signals, Systems, and Computers, 2019 5 pages, conference ...
Chepuri, Sundeep +3 more
openaire +6 more sources
Quantization-Aware Hybrid Anti-Interference Receiver for Partially Connected Arrays with Low-Resolution ADCs [PDF]
SensorsPartially connected hybrid analog-digital beamforming architectures substantially reduce the hardware cost and power dissipation of massive antenna arrays by routing multiple antenna elements to a single radio-frequency (RF) chain.
Dahai Ni +5 more
doaj +2 more sources
Photonic fully-connected hybrid beamforming using microring weight banks [PDF]
Communications EngineeringWireless communication at higher frequency bands has attracted research interest for fifth generation and beyond (5GB) wireless networks due to the large amount of unused bandwidth at these frequencies.
Mitchell Nichols +4 more
doaj +2 more sources
Bioengineering, 2023 Low-complexity ultrasound systems are increasingly desired for both wearable, point-of-care ultrasound and high-end massive-channel ultrasound for 3-D matrix imaging.
Heechul Yoon +3 more
doaj +1 more source
The Information and Wave-Theoretic Limits of Analog Beamforming [PDF]
2018 Information Theory and Applications Workshop (ITA), 2018 Presented at ITA, february ...
Amine Mezghani, Robert W. Heath Jr.
openaire +3 more sources
Hybrid Precoding Technique With Iterative Algorithm for MIMO-OFDM System
IEEE Access, 2020 This paper proposes a hybrid precoding technique based on multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system to improve bit error rate (BER) performance in hybrid beamforming system.
Seulgi Lee +4 more
doaj +1 more source
Wideband analog and digital beamforming [PDF]
2009 9th International Conference on Telecommunication in Modern Satellite, Cable, and Broadcasting Services, 2009 High quality beamforming is necessary for the integrity of phased arrays and accuracy of monopulse direction finding systems. Traditionally, beamformers are realized as hybrid or monolithically integrated analog sub-systems. Their wideband operation is plagued by higher loss, amplitude and phase misbalances, weight, complex integration, etc.
Kasemir, Paul +5 more
openaire +2 more sources