Results 201 to 210 of about 31,082 (236)
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On the impact of downlink feedback on LoRa performance
2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2017Recently, the role of Low-Power Wide Area Networks (LPWANs) as enablers of the Internet of Things (IoT) is emerging. However, many concerns arise on the performance of LPWANs if higher Quality of Service (QoS) requirements are needed by certain classes of IoT services. In this work, we will focus on one of the most prominent of these technologies, i.e.,
Centenaro, Marco +2 more
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Analog MIMO-RoC Downlink With SF2SF
IEEE Wireless Communications Letters, 2019Analog MIMO radio-over-copper is an alternative/complementary solution to conventional fiber-based mobile-fronthaul suitable for the last 200m with goal to reuse existing indoor LAN cables with remarkable economic benefits. Although LAN cables contain four twisted-pairs with up to 500MHz bandwidth/ea., their usage is limited by cable attenuation and ...
Matera, Andrea, Spagnolini, Umberto
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On downlink beamforming with indefinite shaping constraints
IEEE Transactions on Signal Processing, 2006Beamforming schemes have been proposed to exploit the spatial characteristics of multiple-input single-output (MISO) wireless radio channels. Several algorithms are available for optimal joint beamforming and power control for the downlink. Such optimal beamforming minimizes the total transmission power, while ensuring an individual target quality of ...
David Hammarwall +2 more
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WCDMA downlink capacity - part 1
14th IEEE Proceedings on Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003., 2004In this paper we propose a semi-analytical approach, to evaluate WCDMA downlink capacity. New results are provided, with respect to literature, related to the role of the soft handover process and SSDT Mode (site selection diversity transmission power control) in network dimensioning. Moreover, the impact of sectorization has been taken into account in
R Verdone, A Munna, C Balzanelli
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Precoding Design for the MIMO-RoC Downlink
ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2019MIMO Radio-over-Copper (MIMO-RoC) is a transport system for indoor coverage that leverages the pre-existing building’s copper cabling infrastructure. In MIMO-RoC, the overall channel from the Base Band Units (BBU) to the end-user is the cascade of a MIMO-radio over a MIMO-cable channel and the analog fronthaul together with a wireless channel enables ...
Rizzello, V +4 more
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Uplink to downlink spatial covariance matrix transformation concepts for downlink beamforming
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795), 2004We present a comparison of several uplink to downlink covariance matrix transformation methods that can be used in downlink beamforming for frequency selective channels of frequency division duplex (FDD) systems. The performance improvement obtained from the transformation methods is compared with that from the method, which directly uses the uplink ...
B.K. Chalise, L. Haring, A. Czylwik
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Convergence of Federated Learning Over a Noisy Downlink
IEEE Transactions on Wireless Communications, 2022Mohammad Mohammadi Amiri +2 more
exaly