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pro vyhledávání: '"Nanzer A"'
We present a multi-node, multi-objective open-loop microwave distributed beamforming system based on high-accuracy wireless synchronization and localization. Distributed beamforming requires accurate coordination of the spatial and electrical states
Externí odkaz:
http://arxiv.org/abs/2407.15691
We demonstrate an imageless method of concealed contraband detection using a real-time 75 GHz rotationally dynamic antenna array. The array measures information in the two-dimensional Fourier domain and captures a set of samples that is sufficient fo
Externí odkaz:
http://arxiv.org/abs/2406.05924
We demonstrate a wireless, decentralized time-alignment method for distributed antenna arrays and distributed wireless networks that achieves picosecond-level synchronization. Distributed antenna arrays consist of spatially separated antennas that co
Externí odkaz:
http://arxiv.org/abs/2405.18384
Autor:
Rashid, Mohammed, Nanzer, Jeffrey A.
Distributed cooperative spectrum sensing usually involves a group of unlicensed secondary users (SUs) collaborating to detect the primary user (PU) in the channel, and thereby opportunistically utilize it without causing interference to the PU. The c
Externí odkaz:
http://arxiv.org/abs/2403.19556
Autor:
Rashid, Mohammed, Nanzer, Jeffrey A.
Publikováno v:
IEEE Signal Processing Letters, 2023
Precise frequency and phase synchronization are among the important aspects in a coherent distributed phased array antenna system, and are among the most challenging to achieve for microwave frequencies and above. We propose a high accuracy distribut
Externí odkaz:
http://arxiv.org/abs/2302.09351
Autor:
Hilton, Cory, Bush, Steve, Sherman, Faiz, Barker, Matt, Deshpande, Aditya, Willeke, Steve, Nanzer, Jeffrey A.
We demonstrate the classification of common motions of held objects using the harmonic micro-Doppler signatures scattered from harmonic radio-frequency tags. Harmonic tags capture incident signals and retransmit at harmonic frequencies, making them e
Externí odkaz:
http://arxiv.org/abs/2301.05652
We introduce a new technique for secure wireless applications using a single dynamic antenna. The dynamic antenna supports a constantly changing current distribution that generates a radiation pattern that is static in a desired direction and dynamic
Externí odkaz:
http://arxiv.org/abs/2212.12152
Autor:
Rashid, Mohammed, Nanzer, Jeffrey A.
Publikováno v:
IEEE Transactions on Communications, 2023
Distributed phased arrays are comprised of separate, smaller antenna systems that coordinate with each other to support coherent beamforming towards a destination. However, due to the frequency drift and phase jitter of the oscillators, as well as th
Externí odkaz:
http://arxiv.org/abs/2207.11859
Distributed antenna arrays have been proposed for many applications ranging from space-based observatories to automated vehicles. Achieving good performance in distributed antenna systems requires stringent synchronization at the wavelength and infor
Externí odkaz:
http://arxiv.org/abs/2206.08457
Autor:
Rashid, Mohammed, Nanzer, Jeffrey A.
We consider the problem of decentralized frequency and phase synchronization in distributed phased arrays via local broadcast of the node electrical states. Frequency and phase synchronization between nodes in a distributed array is necessary to supp
Externí odkaz:
http://arxiv.org/abs/2204.03691