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Optical Beamforming Network for Multi-Beam Operation With Continuous Angle Selection
IEEE Photonics Technology Letters, 2019We propose an optical beamforming network (OBFN) for multi-beam operation and continuous selection of the beam angles. The OBFN is based on the use of wavelength-division multiplexing elements for the generation and manipulation of the signals that ...
C. Tsokos +5 more
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Distributed Downlink Beamforming in Cellular Networks
2007 IEEE International Symposium on Information Theory, 2007We consider a cellular network where base stations can cooperate to determine the signals to be transmitted on the downlink. Using a particular downlink beamformer structure, we recast our downlink beamforming problem as a virtual linear minimum mean square error (LMMSE) estimation problem.
Boon Loong Ng +2 more
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Distributed beamforming for cognitive relay networks
2014 IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP), 2014A distributed beamforming technique for half-duplex underlay cognitive relay networks is developed in this paper. The considered cognitive relay network consists of one pair of primary users, one pair of secondary users and multiple relays. With the help of multiple relays, the secondary transmitter sends data to the secondary receiver. In our approach,
Haihua Chen 0001, Li Zhang, Guiling Sun
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Interference Reduction by Beamforming in Cognitive Networks
IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference, 2008We consider beamforming in a cognitive network with multiple primary users and secondary users sharing the same spectrum. In particular, we assume that each secondary transmitter has Nt antennas and transmits data to its single- antenna receiver using beamforming. The beamformer is designed to maximize the cognitive user's signal-to-interference ratio (
Simon Yiu, Mai Vu, Vahid Tarokh
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Printed $W$ -Band Multibeam Antenna With Luneburg Lens-Based Beamforming Network
IEEE Transactions on Antennas and Propagation, 2018A simple and low-cost single substrate layer Luneburg lens-based beamforming network (BFN) operating in $W$ -band is proposed. A multibeam antenna is then realized using the novel BFN and fabricated using a low-cost printed circuit board process.
A. B. Numan, J. Frigon, J. Laurin
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Lightweight beamforming networks
NTC '91 - National Telesystems Conference Proceedings, 2002Lightweight BFN (beamforming network) implementation based on a hybrid mode technology is described and shown to provide dramatic weight and size reduction relative to waveguide-implemented designs. The hybrid mode technology refers to an integration of microstrip and guided wave media.
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On the Feasibility of Distributed Beamforming in Wireless Networks
IEEE Transactions on Wireless Communications, 2007Energy efficient communication is a fundamental problem in wireless ad-hoc and sensor networks. In this paper, we explore the feasibility of a distributed beamforming approach to this problem, with a cluster of distributed transmitters emulating a centralized antenna array so as to transmit a common message signal coherently to a distant base station ...
Raghuraman Mudumbai +2 more
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A Beamforming-Network-Based Four-Squint-Beam Array Antenna for Ceiling-Mount Access Point
IEEE Antennas and Wireless Propagation Letters, 2019A novel beamforming network (BFN) applicable to a 2 × 2 array antenna is proposed in this letter. It provides four coexisting squint beams tilted away from the array's boresight and is particularly suitable for ceiling-mount access points.
Jing-Fong Keh +4 more
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Beamforming Methods for Multiuser Relay Networks
2008 IEEE 68th Vehicular Technology Conference, 2008In this paper, we consider a multiuser relay network under amplify and forward (AF) scheme, where each mobile station (MS) is supported by a unique relay station (RS). While the RSs forwards the scaled signal to the MSs, the interference caused by the multiuser nature of the system propagates via the RSs, which significantly degrades the performance ...
Wei Chen 0016 +4 more
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93-GHz Signal Beam Steering with True Time Delayed Integrated Optical Beamforming Network
Optical Fiber Communications Conference and Exhibition, 2019A 93-GHz beam steering experiment based on a 1 × 4 phased array antenna was demonstrated, achieving beam steering angles of −51°, ±34°, ±17° and 0°. An integrated optical beamforming network chip with true time delays was employed.
Yuan Liu +5 more
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