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Active antenna

About: Active antenna is a research topic. Over the lifetime, 2246 publications have been published within this topic receiving 26493 citations.


Papers
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Patent
12 May 2020
TL;DR: In this article, a method for wirelessly calibrating/testing RF and digital components of a multi-antenna device under test includes the step of wirelessly transmitting a first signaling information between the device under-test and a device tester, indicating a calibration request.
Abstract: A method for wirelessly calibrating/testing RF and digital components of a multi-antenna device under test includes the step of wirelessly transmitting a first signaling information between the device under test and a device tester, the first signaling information indicating a calibration request, wherein the first signaling information is transmitted by the device under test or the device tester Further, the method includes the step of estimating, in response to the first signaling information, channel transfer function matrices between active antenna ports/RF ports of the device under test and antenna ports of the device tester using reference signals wirelessly transmitted between the device tester and the device under test or vice versa

2 citations

Book ChapterDOI
01 Jan 1999
TL;DR: A high-speed Optical Data Link connecting active antennas and Base Station in new generation Mobile Radio System has been developed, and the critical aspect related to A/D clock integrity has been successfully solved.
Abstract: In order to simplify site installation and reduce related costs, a high-speed Optical Data Link (ODL) connecting active antennas and Base Station in new generation Mobile Radio System has been developed. Using the Smart Antennas System in a three-sector site, the number of feeders becomes unmanageable and costly. Thanks to the Multicarrier Software Radio approach, it is possible to place antenna and wide band RF hardware close together, transporting IF signal in digital format through high-speed serial data bus. The ODL was built up with Low Cost Gigabit Rate transmitter/receiver chipset and Gigabit Ethernet 1300nm Laser Transceiver. A 50-meter fibre cable has been used to cope with the standard antenna tower height (a three kilometre fibre length is also possible for distributed antennas in a microcell deployment). Reference signals like A/D and D/A signal clock, local oscillator (LO) and frequency references are delivered to remote parts by optical link as well. The critical aspect related to A/D clock integrity has been successfully solved.

2 citations

Proceedings ArticleDOI
18 Jun 2021
TL;DR: In this article, the authors used the REMCOM Wireless Insite X3D ray tracing engine to characterize the mmWave MIMO channel at 28 GHz center frequency and 100 MHz bandwidth in terms of the angular spread.
Abstract: In the forthcoming fifth generation (5G) architecture, full dimension MIMO (FD-MIMO) for enabling high network capacity wireless cellular system is been proposed. FD-MIMO provide beam control in azimuth and elevation plane using active antenna system (AAS) to take advantage of 3D-MIMO techniques such as 3D beamforming. It is therefore necessary to characterize and model channel parameters in 3D domain rather than the current 2D domain used for today’s cellular systems. In this work, using the REMCOM Wireless Insite X3D ray tracing engine, we characterize the mmWave MIMO channel at 28 GHz center frequency and 100 MHz bandwidth in terms of the angular spread (AS) using a 4 x 4 cross-polarized uniform planar array (UPA) at the base station and 2 x 2 MIMO antenna at the small cell receivers. Two scenarios were considered which are the street canyon and the high-rise. We provide 3D models for angular spread of arrival (at the receiver) and departure (at the base station). We obtain the cross-correlation coefficients of the parameters and analyze the effect of BS-UE height on AS.

2 citations

01 Jan 2009

2 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202148
2020113
2019123
201898
201789
2016102