1,720,959 research outputs found
Chip-level Adaptive Equalization Supervised By A Time-multiplexed Common Pilot Sequence In Cdma Systems
No full textThe objective of this paper is to propose a reception technique for improving the performance of CDMA systems relative to conventional direct channel reception. The proposed receiver employs a linear adaptive equalizer trained by a time-multiplexed common pilot sequence. The equalizer, which works in fully supervised mode guided by this signal, provides substantial benefits compared to a conventional RAKE-finger receiver. The functional details and performance results of the reception scheme are described. The receiver can be applied to any transmission technique using CDMA, including broadband WCDMA and other systems. © 2011 IEEE.161165Petre, F., Engels, M., Bourdoux, A., Gyselinckx, B., Moonen, M., De Man, H., Extended MMSE receiver for multiuser interference rejection in multipath DS-CDMA channels (1999) IEEE VTS 50th Vehicular Technology Conference, IEEE VTC 1999 - Fall, 3, pp. 1840-1844. , Amsterdam, the NetherlandsPetre, F., Moonen, M., Engels, M., Gyselinckx, B., De Man, H., Pilot-aided adaptive chip equalizer receiver for interference suppression in DSCDMA forward link (2000) IEEE 52nd Vehicular Technology Conference, IEEE VTS-Fall VTC 2000, 1, pp. 303-308. , Boston, Ma, USAHooli, K., Latva-Aho, M., Juntti, M., Performance evaluation of adaptive chip-level channel equalizers in WCDMA downlink (2001) IEEE International Conference on Communications, ICC 2001, 6, pp. 1974-1979. , St. Petersburg, Russia, JunMargetts, A.R., Schniter, P., Adaptive chip-rate equalization of downlink multirate wideband CDMA (2005) IEEE Transactions on Signal Processing, 53 (6), pp. 2205-2215. , JunCardoso, F.A.C.M., Fernandes, M.A.C., Arantes, D.S., Performance of an adaptive space-time processing receiver for the user terminal of 3G WCDMA systems under COST 259 channel models (2002) IEEE 56th Vehicular Technology Conference, VTC 2002-Fall, 1, pp. 57-61. , Vancouver, British Columbia, CanadaCardoso, F.A.C.M., Fernandes, M.A.C., Arantes, D.S., Space-time processing for smart antennas in advanced receivers for the user terminal in 3G WCDMA systems (2002) IEEE Transactions on Consumer Electronics, 48 (4), pp. 1082-1090. , NovCardoso, F.A.C.M., Fernandes, M.A.C., Arantes, D.S., Space-time processing for smart antennas in advanced receivers for the user terminal in 3G WCDMA systems 2002 International Conference on Consumer Electronics, ICCE 2002, Jun. 2002, pp. 296-297(2001) Physical Layer - General Description, , 3GPP TS 25.201, 3GPP, Tech. Rep. Release 5, v. 5.2.0(2002) Physical Channels and Mapping of Transport Channels onto Physical Channels (FDD), , 3GPP TS 25.211, 3GPP, Tech. Rep. Release 5, v. 5.3.0(2003) Multiplexing and Channel Coding (FDD), , 3GPP TS 25.212, 3GPP, Tech. Rep. Release 5, v.5.4.0(2003) Spreading and Modulation (FDD), , 3GPP TS 25.213, 3GPP, Tech. Rep. Release 5, v.5.3.0Flikkema, P.G., Spread-spectrum techniques for wireless communication (1997) IEEE Signal Processing Magazine, 14 (3), pp. 26-36. , MayTorrieri, D., (2005) Principles of Spread-Spectrum Communication Systems, , Springer ScienceCastoldi, P., (2002) Multiuser Detection in CDMA Mobile Terminals, , Artech House PublishersHolma, H., Toskala, A., (2000) WCDMA for UMTS: Radio Access for Third Generation Mobile Communications, , New York, USA: John Wiley & Sons, IncFazel, K., Performance of CDMA/OFDM for mobile communication system (1993) 2nd International Conference on Universal Personal Communications, 1993. Personal Communications: Gateway to the 21st Century, 2, pp. 975-979. , OctProakis, J., (2000) Digital Communications, , 4th ed. McGraw-Hill Science/Engineering/Math, AugHaykin, S., (2001) Adaptive Filter Theory, , 4th ed. Prentice HallCorrea, L.M., (2001) Wireless Flexible Personalised Communications: COST-259: European Co-Operation in Mobile Radio Research, , J. W. . Sons, E
Spatial And Temporal Adaptive Receiver For Ds-cdma Systems
No full textThe objective of this paper is to propose a reception scheme to improve the performance of DS-CDMA (Direct Sequence Code Division Multiple Access) systems, compared to conventional direct channel receivers. The technique employs a spatial and temporal adaptive receiver composed of N spatial processors (associated with M antennas) and N Decision Feedback Equalizers (DFE), both of which are trained using a TMDP (Time Multiplexed Dedicated Pilot) sequence. The spatial and temporal receiver associated with TMDP offers considerable benefits when compared to the conventional Rake-Finger receiver. Performance results and details of the functioning of the proposed reception scheme are presented. © 2013 Elsevier GmbH. All rights reserved.683216226Petre, F., Engels, M., Bourdoux, A., Gyselinckx, B., Moonen, M., De Man, H., Extended MMSE receiver for multiuser interference rejection in multipath DS-CDMA channels (1999) IEEE VTS 50th Vehicular Technology Conference, IEEE VTC 1999-Fall, 3, pp. 1840-1844. , Amsterdam, The NetherlandsPetre, F., Moonen, M., Engels, M., Gyselinckx, B., De Man, H., Pilot-aided adaptive chip equalizer receiver for interference suppression in DS-CDMA forward link (2000) IEEE 52nd Vehicular Technology Conference, IEEE VTS-Fall VTC 2000, 1, pp. 303-308. , Boston, MA, USAHooli, K., Latva-Aho, M., Juntti, M., Performance evaluation of adaptive chip-level channel equalizers in WCDMA downlink (2001) IEEE International Conference on Communications, ICC 2001, Vol. 6, pp. 1974-1979. , St. Petersburg, RussiaMargetts, A.R., Schniter, P., Adaptive chip-rate equalization of downlink multirate wideband CDMA (2005) IEEE Trans Signal Process, 53 (6), pp. 2205-2215Wang, Y., Wu, J., Wu, W., Adaptive algorithm based on pilot-channel for MMSE multiuser detection in downlink CDMA IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E83-ACardoso, F.A.C.M., Fernandes, M.A.C., Arantes, D.S., Performance of an adaptive space-time processing receiver for the user terminal of 3G WCDMA systems under COST 259 channel models (2002) IEEE 56th Vehicular Technology Conference, VTC 2002 - Fall, Vol. 1, Vancouver, British Columbia, Canada, pp. 57-61Cardoso, F.A.C.M., Fernandes, M.A.C., Arantes, D.S., Space-time processing for smart antennas in advanced receivers for the user terminal in 3G WCDMA systems (2002) IEEE Trans Consumer Electron, 48 (4), pp. 1082-1090Cardoso, F.A.C.M., Fernandes, M.A.C., Arantes, D.S., Space-time processing for smart antennas in advanced receivers for the user terminal in 3G WCDMA systems (2002) 2002 International Conference on Consumer Electronics, ICCE 2002, pp. 296-297Silva, P., Dinis, R., Frequency-domain multiuser detection for cp-assisted DS-CDMA signals (2006) Vehicular Technology Conference, 2006, VTC 2006-Spring. IEEE 63rd, Vol. 5, pp. 2103-2108Takeda, K., Adachi, F., Inter-chip interference cancellation for ds-cdma with frequency-domain equalization (2004) Vehicular Technology Conference, 2004 VTC2004-Fall. 2004 IEEE 60th, 4, pp. 2316-2320Takeda, K., Adachi, F., Frequency-domain interchip interference cancelation for DS-CDMA downlink transmission (2007) IEEE Trans Vehicular Technol, 56 (3), pp. 1286-1294Tran, L.-N., Hong, E.-K., Liu, H., Two-stage hybrid decision feedback equalization for DS-CDMA systems (2008) IEEE Trans Wireless Commun, 7 (5), pp. 1490-1494Fulghum, T., Cairns, D., Cozzo, C., Wang, Y.-P., Bottomley, G., Adaptive generalized rake reception in DS-CDMA systems - [transactions papers] (2009) IEEE Trans Wireless Commun, 8 (7), pp. 3464-3474Fernandes, M.A.C., Cardoso, F.A.C.M., Chiquito, J.G., Costa, M.H.M., Arantes, D.S., (2001) First Report on Smart Antenna Algorithms for Mobile Station Receivers, , Tech. Rep. technical report no. 1, ERICSSON-UNICAMP Contract UNI.35MayFernandes, M.A.C., Cardoso, F.A.C.M., Chiquito, J.G., Costa, M.H.M., Arantes, D.S., (2001) Second Report on Smart Antenna Algorithms for Mobile Station Receivers, , Tech. Rep. technical report no. 2, ERICSSON-UNICAMP Contract UNI.35NovemberFernandes, M.A.C., Cardoso, F.A.C.M., Chiquito, J.G., Costa, M.H.M., Arantes, D.S., (2002) Third Report on Smart Antenna Algorithms for Mobile Station Receivers, , Tech. Rep. technical report no. 3, ERICSSON-UNICAMP Contract UNI.35MayFernandes, M.A.C., Cardoso, F.A.C.M., Chiquito, J.G., Costa, M.H.M., Arantes, D.S., (2003) Fourth Report on Smart Antenna Algorithms for Mobile Station Receivers, , Tech. Rep. technical report no. 4, ERICSSON-UNICAMP Contract UNI.35FebruaryFernandes, M., Arantes, D., Chip-level adaptive equalization supervised by a time-multiplexed common pilot sequence in cdma systems (2011) Microwave Optoelectronics Conference (IMOC), 2011 SBMO/IEEE MTT-S International, pp. 161-165Fernandes, M.A.C., Arantes, D.S., Equalização Adaptativa em Chip Aplicada a Sistemas CDMA com base em uma Sequência Piloto Dedicada Multiplexada no Tempo (2009) Rev Ciência Tecnol, 12, pp. 3-8(2001) Physical Layer - General Description. Tech. Rep. Release 5, V. 5.2.0, , 3GPP TS 25.201 3GPP(2002) Physical Channels and Mapping of Transport Channels onto Physical Channels (FDD), , 3GPP TS 25.211 Tech. Rep. Release 5, v. 5.3.0, 3GPP(2003) Multiplexing and Channel Coding (FDD), , 3GPP TS 25.212 Tech. Rep. Release 5, v.5.4.0, 3GPP(2003) Spreading and Modulation (FDD), , 3GPP TS 25.213 Tech. Rep. Release 5, v.5.3.0, 3GPPFlikkema, P.G., Spread-spectrum techniques for wireless communication (1997) IEEE Signal Process Mag, 14 (3), pp. 26-36Torrieri, D., (2005) Principles of Spread-spectrum Communication Systems, , Springer Science New York, USACastoldi, P., (2002) Multiuser Detection in CDMA Mobile Terminals, , Artech House Publishers Norwood, Massachusetts, USALiberti, J.C., Rappaport, T.S., (1990) Smart Antennas for Wireless Communications: IS-95 and Third Generation CDMA Applications, , Prentice-Hall PTR New Jersey, USAGodara, L.C., (2004) Smart Antennas, , CRC Press LLC Boca Raton, FL, USAChen, S., Zhang, J., Mu, X., Hanzo, L., Minimum bit error rate beamforming receiver for space-division multiple-access based quadrature amplitude modulation systems (2012) Wireless Communications and Networking Conference (WCNC), 2012 IEEE, pp. 498-502Haykin, S., (2001) Adaptive Filter Theory, , 4th ed. Prentice Hall New Jersey, USAHolma, H., Toskala, A., (2000) WCDMA for UMTS: Radio Access for Third Generation Mobile Communications, , John Wiley & Sons, Inc. New York, USALuis, M.C., (2001) Wireless Flexible Personalised Communications: COST-259: European Co-operation in Mobile Radio Research, , John Wiley & Sons New Jersey, US
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
