Добірка наукової літератури з теми "Multiaccess channel"
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Статті в журналах з теми "Multiaccess channel"
Csiszar, Imre, and Prakash Narayan. "Secrecy Generation for Multiaccess Channel Models." IEEE Transactions on Information Theory 59, no. 1 (January 2013): 17–31. http://dx.doi.org/10.1109/tit.2012.2216254.
Повний текст джерелаDowd, P. W., and K. Jabbour. "Spanning multiaccess channel hypercube computer interconnection." IEEE Transactions on Computers 37, no. 9 (1988): 1137–42. http://dx.doi.org/10.1109/12.2267.
Повний текст джерелаDemianowicz, Maciej. "Decoherence-Free Communication over Multiaccess Quantum Channels." Open Systems & Information Dynamics 20, no. 02 (June 2013): 1350007. http://dx.doi.org/10.1142/s1230161213500078.
Повний текст джерелаKrikidis, I. "Multilevel Modulation for Cognitive Multiaccess Relay Channel." IEEE Transactions on Vehicular Technology 59, no. 6 (July 2010): 3121–25. http://dx.doi.org/10.1109/tvt.2010.2047515.
Повний текст джерелаFan, P. Z., M. Darnell, and B. Honary. "Superimposed codes for the multiaccess binary adder channel." IEEE Transactions on Information Theory 41, no. 4 (July 1995): 1178–82. http://dx.doi.org/10.1109/18.391266.
Повний текст джерелаMı́guez, Joaquı́n, and Luis Castedo. "Space–time channel estimation and soft detection in time-varying multiaccess channels." Signal Processing 83, no. 2 (February 2003): 389–411. http://dx.doi.org/10.1016/s0165-1684(02)00426-7.
Повний текст джерелаAwan, Z. H., A. Zaidi, and L. Vandendorpe. "Multiaccess Channel With Partially Cooperating Encoders and Security Constraints." IEEE Transactions on Information Forensics and Security 8, no. 7 (July 2013): 1243–54. http://dx.doi.org/10.1109/tifs.2013.2263804.
Повний текст джерелаPanwar, S. S., D. Towsley, and Y. Armoni. "Collision resolution algorithms for a time-constrained multiaccess channel." IEEE Transactions on Communications 41, no. 7 (July 1993): 1023–26. http://dx.doi.org/10.1109/26.231930.
Повний текст джерелаSeshadri, N., and P. Srikantakumar. "On Group Testing Protocols for Binary-Feedback Multiaccess Channel." IEEE Transactions on Communications 33, no. 6 (June 1985): 574–77. http://dx.doi.org/10.1109/tcom.1985.1096339.
Повний текст джерелаEhsan, Navid, and Tara Javidi. "Delay Optimal Transmission Policy in a Wireless Multiaccess Channel." IEEE Transactions on Information Theory 54, no. 8 (August 2008): 3745–51. http://dx.doi.org/10.1109/tit.2008.926328.
Повний текст джерелаДисертації з теми "Multiaccess channel"
Teletar, İbrahim Emre. "Coding and multiaccess for the energy limited Rayleigh fading channel." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14759.
Повний текст джерелаRen, Weili. "A control-centralised multiaccess protocol exploiting non-selective fading for LEO satellite communications." Thesis, University of Surrey, 2001. http://epubs.surrey.ac.uk/892/.
Повний текст джерелаSagheer, Fakher. "Bayesian statistical methods for joint user activity detection, channel estimation, and data decoding in dynamic wireless networks." Electronic Thesis or Diss., Institut polytechnique de Paris, 2024. https://theses.hal.science/tel-04874844.
Повний текст джерелаGrant-free non-orthogonal multiple access (GF-NOMA) is gradually becoming an integral part of the physical layer of future radio access systems. By allowing access to a base station without explicit allocation of time/frequency/code resources, GF-NOMA not only improves spectral efficiency, but also enables ultra-reliable low latency communications (URLLC) . Such requirements will make it possible to meet the specific challenges of wireless applications such as the Internet of Things, virtual reality, online video games, communications between machines, vehicles, etc.However, GF-NOMA introduces a new challenge that does not exist in conventional communication systems, namely user activity detection: in addition to channel estimation, detection and decoding of interfering users, the base station receiver must be able to classify them into two categories: those who are active and transmitting and those who are not. The massiveness of the system, the absence of power control on transmission and/or orthogonality of user pilot sequences are all characteristics which complicate processing at the receiver.The general subject of this thesis is the study of new statistical methods based on message passing algorithms on appropriate factor graphs in order to jointly handle all these tasks at the receiver level.Are studied more precisely:- a method (1) of hybrid Bayesian inference based on the belief propagation algorithm (BP) and the expectation propagation algorithm (EP) to solve the problem of joint activity detection, channel estimation, and multi-user detection in a synchronous GF-NOMA system with no transmit power control, orthogonal pilot sequences and multiple receiver antennas. By introducing an approximation criterion to express message passing as Gaussian laws, channel estimation and multi-user detection can be efficiently processed by the EP algorithm. This proving impossible in this form for detecting user activity, message passing in BP form is used for this purpose. The proposed method includes a step of estimating the hyperparameters of the model, which are the energy of the received signals and the spatial correlation between the receiving antennas. A reduced complexity variant ignoring the spatial correlation between receiving antennas is also proposed;- a method (2) of Bayesian inference based on the EP algorithm exploiting complex analysis methods (Wirtinger derivatives) making it possible to process user activity detection also in the form of a Gaussian message passing algorithm;- a method (3) preceding method (2) with a Bayesian compressed acquisition method responsible for the initial estimation of the channel and user activity in the more complex context of massive access with non-orthogonal pilot sequences for the users.The evaluation by simulations of these different methods is carried out in the particular case of a synchronous GF-NOMA system by coding, interleaving and OFDM modulation (GF-OFDM-IDMA). The performance obtained (measured in terms of residual bit error rate for detection and decoding, root mean square error for channel estimation, and false alarm and missed-detection probabilities for activity detection) compare favorably with those obtained with traditional methods published in the literature. Keywords: NOMA, grant-free, massive access, OFDM, factor graphs, message passing algorithms, belief propagation, expectation propagation
Khanna, Atul C. "An analysis of multiaccess reservation strategies for satellite channels." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15130.
Повний текст джерелаMICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING
Bibliography: leaf 71.
by Atul C. Khanna.
M.S.
Wikstrand, Greger. "Improving user comprehension and entertainment in wireless streaming media : introducing cognitive quality of service." Licentiate thesis, Umeå University, Computing Science, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-916.
Повний текст джерелаIn future mobile networks service quality might be poor. A new measure is needed to be able to assess services in terms of their effectiveness and usefulness despite their lacking visual appeal. Cognitive Quality of Service is a way to measure the effectiveness in use of a networked service.
This thesis introduces Cognitive Quality of Service and puts it in relation to other ways to measure quality in streaming media. Through four studies the concept is used to improve multicast performance in a WLAN, to assess the effectiveness of simple animations compared to video, to build an application that fuses video and animations and to assess the differences between various levels of streaming video quality.
Guidelines on how to measure Cognitive Quality of Service are introduced based on a review of available literature and later analyzed in light of the studies presented in the thesis. It turns out that the guidelines are sound and should be used as a basis for assessing Cognitive Quality of Service.
Finally, the usefullness of Cognitive Quality of Service is analyzed. It turns out that it is especially useful when comparing different media, e.g. animations and video. In the video only case even bit-rate might be a useful predictor of subjective quality.
I framtiden kommer användare att titta på videosekvenser i trådlösa apparater, exempelvis mobiltelefoner. På grund av tekniska faktorer som störningar och på grund av kostnaden för det kommer den kvalitet som de erhåller inte att vara jämförbar med till exempel den kvalitet som kan erhållas när man tittar på tv. Trots det kan man anta att sådan video kan vara intressant och upplysande.
I avhandlingen introduceras och används begreppet Cognitive Quality of Service (CQoS) - kognitiv servicekvalitet. Begreppet definieras av att den överföring som ger den bästa förståelsen och känslomässiga reaktionen också har bäst CQoS. För att mäta CQoS bör man följa vissa riktlinjer, särskilt som det är svårt att mäta förståelse i samband med att man tittar på video.
Författaren har tillsammans med medarbetare tittat på hur man kan förbättra förhållandena för själva radioöverföringen (studie I). Genom en algoritm som ger multicast-paket bättre skydd mot kollisioner visas att man kan erhålla förbättrad överföringskapacitet för strömmande video i ett trådlöst nätverk.
Animeringar är ett alternativ till video som kräver låg bandbredd. I ett experiment har man undersökt hur väl animeringar står sig mot video av olika kvalitet när det gäller att upplysa användaren och ge en bra upplevelse (studie II). Det visade sig att animeringar var bättre för förståelsen medan video gav en bättre känslomässig upplevelse. Vanare åskådare föredrog videon medan ovanare åskådare föredrog animeringarna.
Frågan som ställdes var då hur man kunde kombinera respektive mediums fördelar för att få en så bra blandning som möjligt. Å ena sidan var animeringarna billiga och lätta att förstå medan videon var dyrare och mer intressant. Ett prototypgränssnitt skapades. Där kunde användaren själv välja vilken mix mellan de två alternativen som skulle visas (studie III). Det visade sig att försökspanelen föredrog video och dessutom ville ha mer information om spelare och match.
Trots animationernas förträfflighet kan man anta att det ändå är video som kommer att dominera i framtiden. En sista studie genomfördes för att se om man kunde finna liknande resultat vid olika kvalitetsgrader i video som man tidigare hade funnit mellan video och animeringar (studie IV). Det visade sig att så länge man höll sig till ett format var sambanden enklare. Mer var helt enkelt bättre upp till en viss gräns där det inte tillförde mer att öka överföringsresurserna för videon.
Sammanfattningsvis visar studierna att CQoS kan ge värdefull designkunskap. I synnerhet när man jämför olika presentationsformer som i det här fallet animeringar och video. Nästa steg blir att gå vidare med att applicera CQoS i tvåvägskommunikation, särskilt i Conversational Multimedia (CMM) ungefär bildtelefoni där det är särskilt goda möjligheter att sammanställa en för omständigheterna anpassad mediamix.
"A perspective on multiaccess channels." Laboratory for Information and Decision Systems, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/1149.
Повний текст джерела"Energy limited channels : coding, multiaccess, and spread spectrum." Laboratory for Information and Decision Systems, Massachusetts Institute of Technology], 1987. http://hdl.handle.net/1721.1/3023.
Повний текст джерелаCaption title. "November 1987."
Includes bibliographical references.
Supported in part by a contract from the National Science Foundation. NSF-ECS-8310698 Supported in part by a contract from ARO. DAAL03-86-K-0171
Goyal, Munish. "Stochastic Control Of Transmissions Over Multiaccess Fading Channels." Thesis, 2004. https://etd.iisc.ac.in/handle/2005/1194.
Повний текст джерелаGoyal, Munish. "Stochastic Control Of Transmissions Over Multiaccess Fading Channels." Thesis, 2004. http://etd.iisc.ernet.in/handle/2005/1194.
Повний текст джерелаKalyanarama, Sesha Sayee KCV. "Scheduling For Stable And Reliable Communication Over Multiaccess Channels And Degraded Broadcast Channels." Thesis, 2006. https://etd.iisc.ac.in/handle/2005/362.
Повний текст джерелаЧастини книг з теми "Multiaccess channel"
Tufvesson, Fredrik, and Torleiv Maseng. "Optimization of Sub-Channel Bandwidth for Mobile OFDM Systems." In Multiaccess, Mobility and Teletraffic, 103–13. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5437-0_9.
Повний текст джерелаLa, Richard, and Venkat Anatharam. "A game-theoretic look at the Gaussian multiaccess channel." In DIMACS Series in Discrete Mathematics and Theoretical Computer Science, 87–105. Providence, Rhode Island: American Mathematical Society, 2004. http://dx.doi.org/10.1090/dimacs/066/06.
Повний текст джерелаHayar, Aawatif, Bernard Lacaze, and Daniel Roviras. "Multiple Access Using Periodic Clock Changes through Slow Fading Multipath Channel." In Multiaccess, Mobility and Teletraffic in Wireless Communications: Volume 4, 63–71. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4757-5920-4_7.
Повний текст джерелаIacono, Ana Lúcia, Ashok Rudrapatna, and Peter Zhu. "The Enhanced Access Channel in cdma2000." In Multiaccess, Mobility and Teletraffic in Wireless Communications: Volume 5, 317–28. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4757-5916-7_27.
Повний текст джерелаBalakrishnan, Jaiganesh, Markus Rupp, and Harish Viswanathan. "Optimal Channel Training for Multiple Antenna Systems." In Multiaccess, Mobility and Teletraffic in Wireless Communications: Volume 5, 25–36. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4757-5916-7_3.
Повний текст джерелаCalin, Doru, and Djamal Zeghlache. "Analysis of GSM HSCSD Service with Channel Allocation Constraints." In Multiaccess, Mobility and Teletraffic for Wireless Communications: Volume 3, 237–52. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-5607-7_16.
Повний текст джерелаSherif, Mahmoud, Ibrahim Habib, Mahmoud Naghshineh, and Parviz Kermani. "Adaptive Channel Borrowing Algorithm for Multimedia Wireless/Mobile Networks." In Multiaccess, Mobility and Teletraffic in Wireless Communications: Volume 5, 123–34. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4757-5916-7_11.
Повний текст джерелаIlić, Željko, Smiljan Pilipović, and Mladen Kos. "An Extended Error Control Technique for Wireless ATM Channel." In Multiaccess, Mobility and Teletraffic in Wireless Communications: Volume 4, 159–65. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4757-5920-4_17.
Повний текст джерелаAkhtar, Saleem, and Djamal Zeghlache. "Rate and Power Adaptation for Downlink Shared Channel in WCDMA." In Multiaccess, Mobility and Teletraffic for Wireless Communications, volume 6, 61–74. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4757-5918-1_4.
Повний текст джерелаChoy, Manhoi, Bo Li, and Xiaomao Liu. "A Distributed and Adaptive Hybrid Channel Allocation Strategy for PCS Networks." In Multiaccess, Mobility and Teletraffic for Wireless Communications: Volume 3, 279–94. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-5607-7_19.
Повний текст джерелаТези доповідей конференцій з теми "Multiaccess channel"
Sankar, Lalitha, Yingbin Liang, H. Vincent Poor, and Narayan Mandayam. "Opportunistic Communications in an Orthogonal Multiaccess Relay Channel." In 2007 IEEE International Symposium on Information Theory. IEEE, 2007. http://dx.doi.org/10.1109/isit.2007.4557396.
Повний текст джерелаChen, Deqiang, and J. Laneman. "The Diversity-Multiplexing Tradeoff for the Multiaccess Relay Channel." In 2006 40th Annual Conference on Information Sciences and Systems. IEEE, 2006. http://dx.doi.org/10.1109/ciss.2006.286669.
Повний текст джерелаAwan, Zohaib Hassan, Abdellatif Zaidi, and Luc Vandendorpe. "On multiaccess channel with unidirectional cooperation and security constraints." In 2012 50th Annual Allerton Conference on Communication, Control, and Computing (Allerton). IEEE, 2012. http://dx.doi.org/10.1109/allerton.2012.6483325.
Повний текст джерелаClarke, Ernest S., R. Prenger, and Monte Ross. "Experimental results with a prototype three-channel multiaccess transceiver lasercom terminal." In OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering, edited by G. Stephen Mecherle. SPIE, 1993. http://dx.doi.org/10.1117/12.149250.
Повний текст джерелаWu, Shuhang, Shuangqing Wei, Yue Wang, Ramachandran Vaidyanathan, Jian Yuan, and Xiqin Wang. "Detection of graph structures via communications over a multiaccess Boolean channel." In 2015 IEEE International Symposium on Information Theory (ISIT). IEEE, 2015. http://dx.doi.org/10.1109/isit.2015.7282917.
Повний текст джерелаRezki, Zouheir, and Mohamed-Slim Alouini. "On the capacity of multiaccess fading channels with full channel state information at low power regime." In ICC 2013 - 2013 IEEE International Conference on Communications. IEEE, 2013. http://dx.doi.org/10.1109/icc.2013.6655045.
Повний текст джерелаSoussi, Mohieddine El, Abdellatif Zaidi, and Luc Vandendorpe. "Compress-and-forward on a multiaccess relay channel with computation at the receiver." In ICC 2013 - 2013 IEEE International Conference on Communications. IEEE, 2013. http://dx.doi.org/10.1109/icc.2013.6655436.
Повний текст джерелаGoyal, M., A. Kumar, and V. Sharma. "Delay optimal control algorithm for a multiaccess fading channel with peak power constraint." In Proceedings. International Symposium on Information Theory, 2005. ISIT 2005. IEEE, 2005. http://dx.doi.org/10.1109/isit.2005.1523708.
Повний текст джерелаCheung, Kwok-wai, Lian-Kuan Chen, C. Su, C. T. Yeung, and P. T. To. "Tunable-channel multiaccess (TCMA) networks: a new class of high-speed networks suitable for multimedia integrated networking." In SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, edited by Leonid G. Kazovsky and Karen Liu. SPIE, 1993. http://dx.doi.org/10.1117/12.161318.
Повний текст джерелаSang Wu Kim. "Optimal multiaccess of slotted communication channels." In IEEE INFCOM '91. The conference on Computer Communications. Tenth Annual Joint Comference of the IEEE Computer and Communications Societies Proceedings. IEEE, 1991. http://dx.doi.org/10.1109/infcom.1991.147562.
Повний текст джерелаЗвіти організацій з теми "Multiaccess channel"
Gallager, R. G. A Perspective on Multiaccess Channels. Fort Belvoir, VA: Defense Technical Information Center, January 1985. http://dx.doi.org/10.21236/ada150183.
Повний текст джерела