Eravant (Formerly SAGE Millimeter)的动态

I am delighted to annouce that our paper entitled "System Level Performance Assessment of Large-Scale Cell-Free Massive MIMO Orientations With Cooperative Beamforming" has been published in IEEE Access: https://lnkd.in/d7QXqHsn Our paper is the first scientific attempt where realistic radiation patterns are used for the performance evaluation of large-scale cell-free massive MIMO orientations. According to the key outcomes of our work, cooperative beamforming can significantly improve energy efficiency for medium data rate services and significantly lower the number of active radiating elements required to meet minimum QoS standards for high data rate services, thereby reducing both hardware and computational demands. This work has been partially supported by the HORSE project "Holistic, Omnipresent, Resilient Services for future 6G Wireless and Computing Ecosystems" HORSE Project Spyros Lavdas George Vardoulias Panagiotis Trakadas Lambros Sarakis Konstantinos Papadopoulos

Integrated Sensing and Communication (ISAC) is emerging as a cornerstone technology for 6G. In this context, digitally programmable metasurfaces, particularly in their Simultaneously Transmitting and Reflecting (STAR) configurations, stand out as a powerful enabling platform, offering seamless full-space coverage.? In a recent article published in the IEEE Signal Processing Magazine, co-authored with Francesco Verde, Lei Zhang, and Tie Jun Cui, we provide a tutorial-style review of this exciting field. The article explores the opportunities and physical limitations from an electromagnetic perspective, as well as the challenges and prospects on the signal-processing front. Looking forward to fostering further cross-disciplinary collaborations within the framework of the SMART project, recently funded under the cascade calls of Fondazione RESTART. Link to article: https://lnkd.in/dzuiK92K

I am proud to share with you that our article "Quantum Key Distribution Spectral Allocation and Performance in Coexistence with Passive Optical Network Standards," has been accepted for publication in a future issue of the IEEE Transactions on Communications and it is now available under the "Early Access" area on IEEE Xplore. https://lnkd.in/dSuXZGvn Alessandro Gagliano Alberto Gatto Pierpaolo Boffi Paolo Martelli #photonics #QKD #PON #EarlyAccess #optics #passion4photonics #Transactions on #Communications IEEE Xplore

In our recently published paper in IEEE Transactions on Wireless Communications, we have proposed a parallel beam acquisition approach for #multiuser millimeter wave (#mmWave) #MIMO #communication systems, in collaboration with Prof. Chunshan Liu (Hangzhou Dianzi University, China), Prof. Iain Collings (Macquarie University, Australia) and Prof. Stephen hanly (Macquarie University, Australia). We have proposed a policy where the base station can reject users during the beam acquisition. This policy is crucial in multiuser scenarios to speed up the beam acquisition by prioritizing strong users in terms of pre-beamforming SNR and requiring weak users to seek connection with an alternate base station. Please refer to our paper for more: https://lnkd.in/gbjwejb4

I am excited to share that our article has been accepted for publication in IEEE Transactions on Wireless Communications! ?? Title: Adaptive Phase Shifters for Hybrid Beamforming in mm-Wave Systems ?? Authors: Mohamed M Alouzi, Halim Yanikomeroglu, and Gunes Karabulut Kurt ?? Abstract: This paper introduces Adaptive Phase Shifters (APSs) for hybrid beamforming in millimeter wave (mmWave) systems. Our proposed APSs design offers a significant breakthrough by minimizing hardware complexity while achieving high spectral efficiency, making it a promising solution for 6G systems and beyond. Key highlights of our research: ? Low Hardware Complexity: APSs operate independently of antenna arrays and RF chains. ? High Performance: Demonstrates comparable or superior performance to traditional designs using fewer phase shifters. ? Innovative Algorithms: Integrates modified K-means algorithms for optimized performance. We believe this work paves the way for more efficient hybrid beamforming systems in next-generation wireless networks. ?? Read the full article here: https://lnkd.in/emUErSmW I’m deeply grateful to my co-authors Halim Yanikomeroglu and Gunes Karabulut Kurt for their collaboration and support throughout this journey. Looking forward to feedback, discussions, and potential collaborations to advance this exciting field! #WirelessCommunications# Hybrid Beamfirming #Machine Learning #mmWave #6G #Research #Innovation

?? Friday Focus from Photonics Spectra Now Researchers at Northwestern University are now demonstrating quantum teleportation over fiber optic cables already installed for internet traffic. How this development could lead to a #quantum internet. And to catch up on all the biggest headlines in the world of hashtag #photoincs, check out this week's episode of Photonics Spectra Now on the Photonics Media YouTube channel: https://lnkd.in/eV74zFah Sponsored by: scia Systems GmbH - www.Scia-Systems.com and by TRIOPTICS - www.Trioptics.com

This paper considers the problem of beam alignment in a #cell-#free #massive #MIMO deployment with multiple access points (APs) and multiple user equipments (UEs) simultaneously operating in the same millimeter wave frequency band. Assuming the availability of a control channel at sub-6 GHz frequencies, a protocol is developed that permits estimating, for each UE, the strongest propagation path from each of the surrounding APs, and to perform user-centric association between the UEs and the APs. Estimation of the strongest paths from nearby APs is realized at the UE in a one-phase procedure, during which all the APs simultaneously transmit on pseudo-randomly selected channels with pseudo-random transmit beamformers. ---- Stefano Buzzi, Carmen D'Andrea, Maria Fresia More details can be found at this link: https://lnkd.in/gH-ckMt2

Happy to share the publication of our work on "An All-Fiber Multimode Interference Device for Power Splitting in Few Mode Fiber Networks," co-authored by Dr. Nitin Bhatia, in Journal of Lightwave Technology. In this work, we have shown an all-fiber multimode interference device for splitting the power propagating in a few mode fiber (FMF) into four (4) identical FMF ports. The splitting operation is achieved efficiently for individual modes, as well as a complex field comprising multiple propagating modes, ensuring mode transparent operation. The fabricated device, with length < 1 cm, shows uniform power splitting in the C-band with less than 0.8 dB power variation among the output ports. The device could provide a possible solution for power splitting in future FMF networks employing the mode division multiplexing technique. IEEE Photonics Society Optica Early Access Version link:

This paper proposed #millimeter (#mm)-waves and 3terahertz (#THz) with high carrier frequencies as the enabling technologies to overcome Shannon's channel capacity limit of existing communication systems by providing ultrawide bandwidth signals. Mm-waves and THz are also able to build wireless links compatible with optical communication systems. Here, the authors show that secure mm-waves and THz #quantum #key #distribution (#QKD) can be achieved when the sources and detectors operate at cryogenic temperatures down to T = 4 K. They compare single-input single-output and #multiple-#input #multiple-#output (#MIMO) #continuous #variable THz #quantum #key #distribution (#CVQKD) schemes and find the positive secret key rate in the frequency ranges between f = 100 GHz and 1 THz. ---- Mingqi Zhang, Stefano Pirandola, Kaveh Delfanazari More details can be found at this link: https://lnkd.in/gZPXmUAP

They investigate spectrum sensing in cognitive radios with large antenna arrays. Gigantic #MIMO and #extra-#large #array #antennas are fundamental technologies in 5G and future 6G networks, as well as other wireless networks like #Wi-#Fi. In conventional multiple antenna spectrum sensing, the likelihood ratio test is standard when samples outnumber antennas. It relies on covariance matrix estimates from the sample covariance matrix and its eigenvalues. However, in large array contexts where the number of antennas matches or exceeds the number of samples, the likelihood ratio test falters due to challenges in accurately estimating the covariance matrix from the sample covariance matrix. To address this limitation, they propose and derive three detectors based on linear spectral statistics from random matrix theory: the generalized likelihood ratio, Frobenius norm, and Rao tests, similar to conventional multiple antenna spectrum sensing.?----@Amirhossein Taherpour,?@Abbas Taherpour,?Tamer Khattab,?@Xiaodong Wang More details can be found at this link: https://lnkd.in/gfFsSN6Q