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Ping-pong beam training for reciprocal channels with delay spread

Elisabeth de Carvalho, Jorgen Bach Andersen
2015 2015 49th Asilomar Conference on Signals, Systems and Computers  
We consider FDD systems for which implicit feedback via channel reciprocity is not available.  ...  The techniques exploit channel reciprocity and use relative calibration techniques only among the nodes in the transmit cluster to compensate for non-reciprocal transceiver effects.  ...  WA2b-2 10:40 AM Ping-Pong Beam Training for Reciprocal Channels with Delay Spread Elisabeth De Carvalho, Jørgen Bach Andersen, Aalborg University, Denmark We present an iterative beam training procedure  ... 
doi:10.1109/acssc.2015.7421451 dblp:conf/acssc/CarvalhoA15 fatcat:mqokuvnh3zg45licnfbgxyvxfu

Millimeter Wave Beamforming for Wireless Backhaul and Access in Small Cell Networks

Sooyoung Hur, Taejoon Kim, David J. Love, James V. Krogmeier, Timothy A. Thomas, Amitava Ghosh
2013 IEEE Transactions on Communications  
The performance of the proposed alignment technique is analyzed and compared with other search and alignment methods. The results show significant performance improvement with reduced search time.  ...  To overcome this, we propose an efficient beam alignment technique using adaptive subspace sampling and hierarchical beam codebooks.  ...  & Pingpong Search (Proposed Algorithm) Fig. 12.  ... 
doi:10.1109/tcomm.2013.090513.120848 fatcat:22b65zn4kngljdfywmdinxchha

Space-time processing for wireless communications

A.J. Paulraj, C.B. Papadias
1997 IEEE Signal Processing Magazine  
Vanderveen for their contributions and for their useful comments on the manuscript.  ...  We would also like to thank the anonymous reviewers for their suggestions, which greatly helped in improving the article.  ...  In time-division duplexing (TDD) systems, the principle (SU-SIMO) of reciprocity applies as long as the "ping-pong" time (the time separating a receive from a transmit frame in TDD systems) is very small  ... 
doi:10.1109/79.637317 fatcat:2j7lq24r3rghdiwsnn3wxwuivm

Noisy Beam Alignment Techniques for Reciprocal MIMO Channels

Dennis Ogbe, David J. Love, Vasanthan Raghavan
2017 IEEE Transactions on Signal Processing  
The focus of this work is on beam alignment for time-division duplexing (TDD) systems, for which we propose a number of novel algorithms.  ...  the low-SNR regime (typical for mmWave systems) with minimal complexity/feedback overhead.  ...  During slot 1 (ping), node 1 sends a training symbol to node 2 on the downlink channel H. During slot 2 (pong), node 2 sends a training symbol back to node 1 on the uplink channel H T .  ... 
doi:10.1109/tsp.2017.2715001 fatcat:z3homk3sm5bgnnrrldwqy2i67i

MIMO Wireless Linear Precoding

Mai Vu, Arogyaswami Paulraj
2007 IEEE Signal Processing Magazine  
He has won several awards for his research and engineering contributions, including the IEEE Signal Processing Society's Technical Achievement Award.  ...  ACKNOWLEDGMENT The authors would like to thank the anonymous reviewers for closely reading the manuscript and providing detailed comments, which helped improve the quality of this paper.  ...  In voice systems, this lag is the ping-pong period; in asynchronous data systems, the lag is the scheduling delay between the reception of the signal from a user and the next transmission to that user.  ... 
doi:10.1109/msp.2007.904811 fatcat:cz6ffonyi5cwtc6klu73dh7xei

A Comprehensive Survey on Mobility Management in 5G Heterogeneous Networks: Architectures, Challenges and Solutions

Emre Gures, Ibraheem Shayea, Abdulraqeb Alhammadi, Mustafa Ergen, Hafizal Mohamad
2020 IEEE Access  
Intense deployment of small cells, along with many advantages it provides, brings important mobility management problems such as frequent handover (HO), HO failure, HO delays, ping-pong HO and high energy  ...  level mobility and beam management.  ...  users and ping pong users.  ... 
doi:10.1109/access.2020.3030762 fatcat:72pl4aunwjbsrpojd62fox74na

Wireless Communication, Sensing, and REM: A Security Perspective

Haji M. Furqan, Muhammad Sohaib J. Solaija, Halise Turkmen, Huseyin Arslan
2021 IEEE Open Journal of the Communications Society  
Sections IV, V, and VI discuss the exploratory, manipulation, disruption attacks with solutions, respectively.  ...  A case study to highlight the need for a secure REM in the context of V2X communication is described in Section VII.  ...  In the former case, an approach similar to the hysteresis margin for alleviating ping-pong handovers in cellular networks [102] can be utilized to avoid unnecessary or redundant sensing updates.  ... 
doi:10.1109/ojcoms.2021.3054066 fatcat:klhorbflvvdrlkqyndctn3lwtq

On Securing Underwater Acoustic Networks: A Survey

Shengming Jiang
2018 IEEE Communications Surveys and Tutorials  
The research of UWAN security is still in an early stage, and the paper discusses several important issues necessarily for further studies at the end.  ...  Peculiar features of UWANs such as very constrained resources pose big challenges in defending UWANs against security threats, and many research results are published to address these issues along with  ...  DS-CDMA is vulnerable to attacks because it is possible for attackers to identify blindly the spreading code used by the legitimate user when neither channel state information (CSI) nor training sequence  ... 
doi:10.1109/comst.2018.2864127 fatcat:7b5wufjqmvcnje7pcmxrdf6ehi

Implementation of Fog computing for reliable E-health applications

Razvan Craciunescu, Albena Mihovska, Mihail Mihaylov, Sofoklis Kyriazakos, Ramjee Prasad, Simona Halunga
2015 2015 49th Asilomar Conference on Signals, Systems and Computers  
In this paper we compare one-stage and two-stage radio access protocol options tailored for sporadic transmissions of small data packets in uplink with respect to throughput and delay requirements.  ...  Specifically, we introduce a concept for sparse joint activity, channel and data detection in the context of the Coded ALOHA (FDMA) protocol.  ...  WA2b-2 10:40 AM Ping-Pong Beam Training for Reciprocal Channels with Delay Spread Elisabeth De Carvalho, Jørgen Bach Andersen, Aalborg University, Denmark We present an iterative beam training procedure  ... 
doi:10.1109/acssc.2015.7421170 dblp:conf/acssc/CraciunescuMMKP15 fatcat:qm6mki5z6bcvrfimkmqjyrxaxm

Neurophysiological and Computational Principles of Cortical Rhythms in Cognition

Xiao-Jing Wang
2010 Physiological Reviews  
B: a model chattering neuron endowed with a ping-pong interplay between two electrotonic compartments. [A from Gray and McCormick (373); B from Wang (1028).]  ...  In either case, the "ping-pong" iterative interplay between spikes and afterdepolarization underlies a burst of spikes, which is terminated by the activation of a K ϩ current.  ... 
doi:10.1152/physrev.00035.2008 pmid:20664082 pmcid:PMC2923921 fatcat:m5xm2wpx2ne7rhc5iwjg45muca

Interferometric Synthetic Aperture Radar Geodesy [chapter]

M. Simons, P.A. Rosen
2007 Treatise on Geophysics  
9; x 0 ; R 0 ð Þ ¼ e -j4R0= sinc ÁR r 9 -R 0 ð Þ Â sinc ÁX x9 -x 0 ð Þ Pixel dimensions A b e jφ b A b e jφ b ∑A εi e jφ εi e -j(4π/λ)rεi A b e jφ b e -j(4π/λ)r 1 A b e jφ b e -j(4π/λ)r 2 'Ping-pong  ...  For a collection of scatterers over the beam pointed with a particular squint, all scatterers experience the same Doppler frequency spread, so the spectra would be as shown, controlled in extent and magnitude  ...  For our purposes, we let with the understanding that the 'carrier' has been removed.  ... 
doi:10.1016/b978-044452748-6.00059-6 fatcat:agzc6grlszffja2ztnytjb5tde

RSFQ TECHNOLOGY: CIRCUITS AND SYSTEMS

DARREN K. BROCK
2001 International Journal of High Speed Electronics and Systems  
A necessary key to translating these advantages to the systemlevel involves understanding the I/O, synchronization, and packaging issues associated with a cryogenic technology.  ...  Rapid Single-Flux-Quantum (RSFQ) logic is a superconductor IC technology that, with only a modest number of researchers worldwide, has produced some of the world's highest performance digital and mixed-signal  ...  Acknowledgements Special thanks to all who contributed data, text, figures, and/or assisted with proofreading, including: John  ... 
doi:10.1142/s0129156401000861 fatcat:awsevonrufgdzmmcmhf5lra5we

RSFQ TECHNOLOGY: CIRCUITS AND SYSTEMS [chapter]

DARREN K. BROCK
2001 Selected Topics in Electronics and Systems  
A necessary key to translating these advantages to the systemlevel involves understanding the I/O, synchronization, and packaging issues associated with a cryogenic technology.  ...  Rapid Single-Flux-Quantum (RSFQ) logic is a superconductor IC technology that, with only a modest number of researchers worldwide, has produced some of the world's highest performance digital and mixed-signal  ...  Acknowledgements Special thanks to all who contributed data, text, figures, and/or assisted with proofreading, including: John  ... 
doi:10.1142/9789812810014_0010 fatcat:hryou65xmra4tnl5thdwwj7nrm

Acoustofluidics: Theory and simulation of streaming and radiation forces at ultrasound resonances in microfluidic devices

Henrik Bruus
2009 Journal of the Acoustical Society of America  
In the split-beam system, each position of these fishes in three-dimensional space was estimated from delays of echoes and differences of delays between receive channels.  ...  "Ping-pong" alternating sampling may be used to acquire samples from both channels concurrently, possibly to assess timeof-arrival differences between the two hydrophones.  ...  The bubble densities were observed to have power-law forms with varying parameters with the strongest, for early ages, having an exponent of Ϫ3.6 and a void fraction of 4ϫ10 Ϫ7 , and with both diminishing  ... 
doi:10.1121/1.4783855 fatcat:cyftnzsenzempdbtk4dd2hzw5u

Ocean, platform, and signal processing effects on synthetic aperture sonar performance

Kenneth D. Rolt
1991 Journal of the Acoustical Society of America  
Large synthetic apertures give rise to relatively narrow synthesized beams, which in turn allow very high resolution focused images to be formed from radar or sonar data.  ...  The target in the synthetic aperture sonar case could be the ocean bottom, and the objective could be, for example, ocean-bottom mapping or searching for a sunken vessel.  ...  I also thank the Charles Stark Draper Laboratory for sponsoring the work.  ... 
doi:10.1121/1.400746 fatcat:6357pltnarepbobpsu4b3ter6a
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