Hikmat N. Abdullah, Nuha Sh. Bakr, Alejandro A. Valenzuela: Double Threshold Soft Decision Rule for Improving Performance of Cognitive Radio Networks. In: 2019 IEEE 9th International Conference on Consumer Electronics (ICCE-Berlin), 8-11 Sept. 2019, Berlin, Germany, 2020, S. 158-161
doi:10.1109/ICCE-Berlin47944.2019.8966232 BibTeX | RIS

Alejandro A. Valenzuela, Mauro Schwab, Adolfo A. Silnik, Alfredo F. Debattista, Roberto A. Kiessling: Low Power Wireless Sensor Node Platform for Agriculture Monitoring in Argentina. In: 2018 International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, CyberC 2018, 18–20 October 2018, Zhengzhou, China, 2019, S. 101-105
doi:10.1109/CyberC.2018.00029 BibTeX | RIS

Fadhil S. Hasan, Alejandro A. Valenzuela: Design and Analysis of an OFDM-Based Orthogonal Chaotic Vector Shift Keying Communication System. In: IEEE Access, Vol.6, 2018, S. 46322-46333
doi:10.1109/ACCESS.2018.2862862 BibTeX | RIS

Alejandro Valenzuela: Abwehrvorrichtung für kriechende lnsekten. Patent-Nr. DE102016002094 (A1), 2017
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J. Vollmer, L. Bernhard, C. Schirrmeister, M. Ulrich, A. Valenzuela: Flexible machine monitoring by combination of autonomous wireless sensors with a web-interfaced sensor system. In: International Conference on Research and Education in Mechatronics (REM), 14-15 Sept. 2017, Wolfenbuettel, Germany, 2017, S. 1-6
doi:10.1109/REM.2017.8075229 BibTeX | RIS

Lucas E. Ramero, Adolfo A. Silnik, Alfredo F. Debattista, Roberto A. Kiessling, Alejandro A. Valenzuela: Propuesta de Arquitectura de Red de Datos para el Proyecto Campo Conectado. In: IX Congreso Argentino de AgroInformática (CAI) - JAIIO 46-CLEI 43, Córdoba, 4-8 Sept. 2017, Vol.46, 2017, S. 112-126
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Hikmat N. Abdullah, Sura F. Yousif, Alejandro A. Valenzuela: Wavelet based image steganographic system using chaotic signals. In: 6th International Conference on Information Communication and Management (ICICM), Hatfield, UK, 29-31 Oct. 2016, 2016, S. 130-135
doi:10.1109/INFOCOMAN.2016.7784229 BibTeX | RIS

A. Gatri, Z. Ghassemlooy, A. Valenzuela: Performance analysis of QPSK FSO system with various operating wavelengths and adaptive optics over fog channel. In: Plank (Ed.): 2016 International Conference on Broadband Communications for Next Generation Networks and Multimedia Applications (CoBCom). 14-16 Sept. 2016, Graz, Austria, 2016, S. 1-6
doi:10.1109/COBCOM.2016.7593511 BibTeX | RIS

Hikmat N. Abdullah, Fadhil Sahib, Alejandro A. Valenzuela: FPGA based pi/4-DQPSK complex wavelet packet modulation. In: 21st Symposium on Communications and Vehicular Technology in the Benelux (SCVT), Delft, Netherlands, 10 Nov. 2014, 2015, S. 85-89
doi:10.1109/SCVT.2014.7046713 BibTeX | RIS

A. Gatri, Z. Ghassemlooy, A. Valenzuela, O. Strobel, R. Rejeb: Experimental study of coherent detection BPSK modulated communication link under controlled fog atmospheric conditions. In: 9th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP). Manchester, UK, 23-25 July 2014, 2014, S. 357-361
doi:10.1109/CSNDSP.2014.6923854 BibTeX | RIS

Alejandro A. Valenzuela: Multisensor system for energy consumption awareness in large buildings. In: International Conference on Smart Grid Technology, Economics and Policies (SG-TEP), Nuremberg, Germany, 3-4 Dec. 2012, 2013
doi:10.1109/SG-TEP.2012.6642392 BibTeX | RIS

Hikmat N. Abdullah, Fadhil Sahib, Alejandro Valenzuela: Hybrid PAPR reduction technique for complex wavelet packet modulation system. In: IFIP Wireless Days (WD), Dublin, Ireland, 21-23 Nov. 2012, 2013
doi:10.1109/WD.2012.6402814 BibTeX | RIS

A. Gatri, Z. Ghassemlooy, A. Valenzuela, O. Strobel, R. Rejeb, E. Leitgeb: Experimental study of the performance for BPSK subcarrier intensity modulation free space optics communications in a laboratory controlled turbulence channel. In: 18th European Conference on Network and Optical Communications & 8th Conference on Optical Cabling and Infrastructure (NOC-OC&I 2013), Graz, Austria, July 10-12, 2013, 2013, S. 287-292
doi:10.1109/NOC-OCI.2013.6582901 BibTeX | RIS

Alejandro A. Valenzuela, Hikmat N. Abdullah: Low Power Transmission for Autonomous Wireless Indoor Sensors. In: 16th International Conference on Sensors and Measurement Technology, Nuremberg, Germany, 14.-16. 5. 2013, 2013, S. 448-451
doi:10.5162/sensor2013/C6.3 BibTeX | RIS

Hikmat N. Abdullah, Fadhil Hassan, Alejandro A. Valenzuela: FPGA based fast complex wavelet packet modulation (FCWPM) system. In: IEEE International Conference on Circuits and Systems (ICCAS), Kuala Lumpur, 18-19 Sept. 2013, 2013, S. 114-119
doi:10.1109/CircuitsAndSystems.2013.6671610 BibTeX | RIS

Hikmat N. Abdullah, Alejandro A. Valenzuela: Efficient chaotic communication system for wireless sensing applications. In: IEEE 9th International Multi-Conference on Systems, Signals and Devices (SSD), Chemnitz, Germany, 20-23 March 2012, 2012, S. 1-5
doi:10.1109/SSD.2012.6198019 BibTeX | RIS

Hikmat N. Abdullah, Alejandro A. Valenzuela: Performance Evaluation of FM-COOK Chaotic Communication System. In: Journal of Signal and Information Processing, 2(3), 2011, S. 175-177
PDF Download (CC BY 4.0) doi:10.4236/jsip.2011.23023 urn:nbn:de:hbz:1044-opus-8455 BibTeX | RIS

A. A. Valenzuela, G. Heinen, M. Neumann, W. Prinz: Energietransparenz durch vernetzte Ethernet‐Stromsensor‐Plattform. In: Radar, Communication & Measurement Workshop and Developer Forum, Hamburg, April 2011, 2011
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H. N. Abdullah, A. A. Valenzuela: Chaotic Communication for Wireless Sensing Applications. In: RadioTecC -Transmit & Test Solutions Workshop, Berlin, October 2011, 2011
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H. N. Abdullah, F. Sahib, A. A. Valenzuela: Design of High Speed Haar Wavelet Packet Modulation (HWPM) System. In: Mosharaka International Conference on Communications, Computers and Applications (MIC-CCA2011), 2011, S. 65-72
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Alejandro A. Valenzuela, Hikmat N. Abdullah: A Joint Matlab/FPGA Design of AM Receiver for Teaching Purposes. In: Lindenmeier, Weigel (Eds.): Electromagnetics and Network Theory and their Microwave Technology Applications, Berlin, Heidelberg: Springer, 2011, S. 189-199
doi:10.1007/978-3-642-18375-1_14 BibTeX | RIS

A. A. Valenzuela, G. Heinen, M. Neumann, W. Prinz: Low Cost Displays: final report prepared for RheinEnergie, Cologne. 2010
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A. A. Valenzuela, H. A. Hadi, H. N. Abdullah: FPGA Based Transceiver with Multiple Modulation Schemes Designed with Simulink HDL Coder. In: Electrical and Electronic Engineering for Communication Workshop and Developer Panel, Ulm, June 2010, 2010
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A. A. Valenzuela, H. A. Hadi, H. N. Abdullah: Design and Implementation of a FPGA Based Software Defined Radio Using Simulink HDL Coder. In: Radar, Communication & Measurement Workshop and Developer Forum, Hamburg University of Technology, Hamburg, April 2010, 2010
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M. Krist, H. Wilden, A. A. Valenzuela: Design und Charakterisierung alternativer Chirp-basierter Signalgenerierungsschaltungen für Waveform-Diversity-Betrieb in bildgebenden Radaren im K-Band. In: Electrical and Electronic Engineering for Communication Workshop and Developer Panel, Ulm, June 2010, 2010
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T. S. Beyer, A. A. Valenzuela: Der Entscheidungsweg zu aktuellen Funktechnologien für die M2M-Vernetzung im Alltag. In: Electrical and Electronic Engineering for Communication Workshop and Developer Panel, Ulm, June 2010, 2010
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A. A. Valenzuela, G. Heinen, M. Neumann, W. Prinz: Evaluation des Smart Metering-Konzepts: final presentation of interview results of the project "Future Housing" at IHK Köln/Bonn, Cologne. 2009
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A. A. Valenzuela, G. Heinen, M. Neumann, W. Prinz: Ergebnisse der Workshops zur Nutzerfreundlichkeit ausgewählter Systeme: final presentation of usability workshops for RheinEnergie, Cologne, November 2009. 2009
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H. N. Abdullah, A. A. Valenzuela: A joint MATLAB/FPGA design of a digital receiver for teaching purposes. In: IEEE International Mini-Symposium on Electromagnetics and Network Theory and their Microwave Technology Applications (EMNT), Munich, October 2008, 2008
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Andreas Bunzemeier, Rolf-Dieter Lepper, Udo Roth, Hans Schäfer, Andrea Schwandt, Gerd Steinebach, Christian Uhde, Alejandro A. Valenzuela: Entwicklung von Hard- und Softwaremodulen für einen Kurzwellentransceiver nach dem SDR-Prinzip zum Einsatz in der Lehre: Abschlussbericht. Fachhochschule Bonn-Rhein-Sieg, Fachbereich EMT, Sankt Augustin, 2006
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W. Rauch, E. Gornik, G. Sölkner, A. A. Valenzuela, H. Behner, G. Gieres: High temperature superconducting coplanar and epitaxially grown microstrip transmission lines studied by a half-wavelength resonator technique. In: Applied Superconductivity, 2(6), 1994, S. 417-423
doi:10.1016/0964-1807(94)90089-2 BibTeX | RIS

H. Hübner, A. A. Valenzuela: Radio frequency performance of superconducting thin films in high magnetic fields. In: Applied Physics Letters, 64(25), 1994, S. 3491-3493
doi:10.1063/1.111250 BibTeX | RIS

R. Weigel, A. A. Valenzuela, P. Russer: Koplanare hochtemperatur­supraleitende Hochfrequenzbauelemente. In: Kleinheubacher Berichte, Vol.37, 1993, S. 205-214
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R. Weigel, M. Nalezinski, A. A. Valenzuela, P. Russer: High-temperature superconducting X-band CPW band-pass filters with small band­width. In: Proc. Asia-Pacific Microwave Conference (APMC93), Hsindu, Taiwan, 16/55-58 (1175+11 addendum), 1993
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R. Weigel, A. A. Valenzuela, P. Russer: YBCO superconducting microwave components. In: Applied Superconductivity, 1(10-12), 1993, S. 1595-1604
doi:10.1016/0964-1807(93)90307-N BibTeX | RIS

R. Weigel, M. Nalezinski, A. A. Valenzuela, P. Russer: Narrow-band YBCO superconducting parallel-coupled coplanar waveguide band-pass filters at 10 GHz. In: IEEE MTT-S International Microwave Symposium Digest, Atlanta, GA, USA, 14-18 June 1993, 1993, S. 1285-1288
doi:10.1109/MWSYM.1993.277109 BibTeX | RIS

A. A. Valenzuela, G. Sölkner, J. Kessler, P. Russer: Microwave Characterisation of Structured YBa2Cu3O7-δ - Thin Films. In: MSF (Materials Science Forum), Vol.130-132, 1993, S. 349-372
doi:10.4028/www.scientific.net/MSF.130-132.349 BibTeX | RIS

A. A. Valenzuela, G. Sölkner, J. Kessier, P. Russer: Surface resistance and magnetic penetration depth of structured YBa2Cu3O7-δ-thin films. In: Applied Superconductivity, 1(10-12), 1993, S. 1615-1632
doi:10.1016/0964-1807(93)90309-P BibTeX | RIS

W. Rauch, A. A. Valenzuela, G. Sölkner, F. Fox, H. Behner, G. Gieres, E. Gornik: Coplanar waveguide and epitaxial YBa2Cu3O7-x/NdAlO3/YBa2Cu3O7-x-trilayer transmission line resonators for microwave applications. In: Applied Superconductivity, 1(10-12), 1993, S. 1633-1643
doi:10.1016/0964-1807(93)90310-X BibTeX | RIS

W. Rauch, E. Gornik, A. A. Valenzuela, G. Sölkner, F. Fox, H. Behner, G. Gieres, P. Russer: Planar transmission line resonators from YBa2Cu3O7-x thin films and epitaxial SIS multilayers. In: IEEE Transactions on Applied Superconductivity, 3(1), 1993, S. 1110-1113
doi:10.1109/77.233895 BibTeX | RIS

W. Rauch, E. Gornik, G. Sölkner, A. A. Valenzuela, F. Fox, H. Behner: Microwave properties of YBa2Cu3O7−x thin films studied with coplanar transmission line resonators. In: Applied Physics Letters, 73(4), 1993, S. 1866-1872
doi:10.1063/1.353173 BibTeX | RIS

W. Rauch, E. Gornik, G. Sölkner, A. A. Valenzuela, F. Fox, H. Behner: Microwave properties of structured YBa2Cu3O7−x thin films. In: Journal of Alloys and Compounds, Vol.195, 1993, S. 571-574
doi:10.1016/0925-8388(93)90802-T BibTeX | RIS

A. A. Valenzuela, G. Sölkner, J. Kessler, P. Russer: Surface resistance and magnetic penetration depth of structured YBa2Cu3O7-x-thin films. In: 3rd International Conference, World Congress on Superconductivity, Munich, September 1992, 1992
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A. A. Valenzuela: High temperature superconducting high frequency devices. In: ESA/ESTEC Work-Meeting, High Temperature Superconductors in Space, Noordwijk, Netherlands, April 1992, 1992
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Robert Weigel, Alejandro A. Valenzuela, Peter H. Russer: YBCO Superconducting Microwave Oscillator. In: 22nd European Microwave Conference 1992, 1992, S. 98-100
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Alejandro A. Valenzuela, M. Nalezinski, Robert Weigel, B. Daalmans, Peter H. Russer: Transmission Line filters with High Tc Superconducters. In: 22nd European Microwave Conference 1992, 1992, S. 75-80
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Peter H. Russer, Alejandro A. Valenzuela: Linear Passive Microwave Circuits with High Temperatur Superconductors. In: 22nd European Microwave Conference 1992, 1992, S. 61-68
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W. Rauch, A. A. Valenzuela, G. Sölkner, H. Behner, G. Gieres, E. Gornik: Microstrip transmission line resonator with epitaxial YBa2Cu3O7-x/NdAIO3/YBa2Cu2O7-x trilayer. In: Electronics Letters, 28(6), 1992, S. 579
doi:10.1049/el:19920365 BibTeX | RIS

W. Rauch, H. Behner, G. Gieres, G. Sölkner, F. Fox, A. A. Valenzuela, E. Gornik: DC-magnetron sputtering of YBa2Cu3O7−δ thin films for microwave applications. In: Physica C: Superconductivity, 198(3-4), 1992, S. 389-396
doi:10.1016/0921-4534(92)90218-2 BibTeX | RIS

Roland Ramisch, Ralf Klieber, Martin H. Schwab, Alejandro A. Valenzuela, Robert Weigel, Peter H. Russer: On the design and performance of a hybrid-integrated high-T c superconducting C-band oscillator. In: Proc. URSI Int. Symp. Signals, Systems and Electronics (ISSSE92), Paris, Sept. 1992, Vol.1, 1992, S. 89-92
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J. Kraus, G. Soelkner, A. A. Valenzuela: An electro-optic laser probe at low temperature for the characterization of planar integrated microwave resonators. In: Microelectronic Engineering, 16(1-4), 1992, S. 333-340
doi:10.1016/0167-9317(92)90354-T BibTeX | RIS

R. Klieber, R. Ramisch, R. Weigel, M. Schwab, A. A. Valenzuela, R. Dill, P. Russer: Single-Substrate High-Tc Superconducting Coplanar Oscillator at 6.5 GHz. In: AMPC Asia-Pacific Microwave Conference, Adelaide, South Australia, 11-13 August 1992, 1992, S. 127-130
doi:10.1109/APMC.1992.671974 BibTeX | RIS

R. Klieber, R. Ramisch, A. A. Valenzuela, R. Weigel, P. Russer: A coplanar transmission line high-T/sub c/ superconductive oscillator at 6.5 GHz on a single substrate. In: IEEE Microwave and Guided Wave Letters, 2(1), 1992, S. 22-24
doi:10.1109/75.109131 BibTeX | RIS

R. Klieber, R. Ramisch, R. Weigel, M. Schwab, R. Dill, A. A. Valenzuela, P. Russer: High-temperature superconducting resonator-stabilized coplanar hybrid-integrated oscillator at 6.5 GHz. In: 1991 IEEE Int. Electron Devices Meeting (IEDM), Digest, 1991, S. 923-926
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J. Keßler, P. Russer, R. Dill, A. A. Valenzuela: Characterization of high-Tc superconducting coplanar structures by a partial wave synthesis. In: Proc. Progress in Electromagnetics Research Symp., Cambridge/Mass. USA, 1991, S. 592
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J. Keßler, R. Dill, P. Russer, A. A. Valenzuela: Analyse von koplanaren Resonatoren aus hochtemperatur-supraleitenden Dünnfilmen. In: Kleinheubacher Berichte, Vol.34, 1991, S. 161-170
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G. Gieres, B. Roas, P. Russer, G. Sölkner, A. A. Valenzuela, E. Wolfgang: Planar resonators for the characterization of high-Tc thin films. In: Proceedings of the and European Conference on Advanced Materials and Processes (EUROMAT 91), University of Cambridge, UK, 22-24 July 1991, 1991, S. 401-404
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G. Gieres, J. Kessler, J. Kraus, B. Roas, P. Russer, G. Soelkner, A. A. Valenzuela: High-frequency characterization of YBa 2 Cu 3 O 7-x thin films with coplanar resonators. In: Superconductor Science and Technology, 4(11), 1991, S. 629-632
doi:10.1088/0953-2048/4/11/020 BibTeX | RIS

Alejandro A. Valenzuela: Testchip für passive Bauelemente der Hochfrequenztechnik. In: Workshop „Mikrowellen“ der Gesellschaft für Angewandte Supraleitung (GAS), Karlsruhe, December 1990 – invited talk, 1990
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A. A. Valenzuela, B. Roas, P. Prieto, U. Poppe, B. Daalmans, G. Sölkner, E. Wolfgang: Koplanare Leitungsresonatoren hoher Güte aus YBa2Cu3O7-x. In: Verhandlungen der Deutschen Physikalischen Gesellschaft, Frühjahrstagung Regensburg, 1990, 1990
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A. A. Valenzuela, G. Daalmans, R. Dill, P. Russer, L. Schultz, G. Sölkner, E. Wolfgang: Testchip for high temperature superconductor passive devices. In: MTT-S Workshop, Dallas, USA, May 1990 – invited talk, 1990
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J. Kebler, R. Dill, P. Russer, A. A. Valenzuela: Property Calculations of a Superconducting Coplanar Waveguide Resonator. In: 20th European Microwave Conference, Budapest, Hungary, 04.-06.10.1990, 1990, S. 798-803
doi:10.1109/EUMA.1990.336141 BibTeX | RIS

R. Dill, J. Otto, G. Riha, P. Russer, L. Schultz, G. Sölkner, A. A. Valenzuela, E. Wolfgang: Testchip for high temperature superconductor passive devices. In: IEEE International Digest on Microwave Symposium, Dallas, TX, USA, 8-10 May 1990, 1990, S. 863-866
doi:10.1109/MWSYM.1990.99715 BibTeX | RIS

B. Daalmans, G. Sölkner, A. A. Valenzuela, E. Wolfgang: Passive high-Tc components. In: Vide Couches Minces 45, 1990, Vol.45, 1990, S. 202-204
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A. A. Valenzuela: Entwicklung von Mikrowellenbauelementen aus Hochtemperatur-Supraleitern. In: Kernforschungsanlage Jülich, Jülich, Mai 1989 - invited seminar, 1989
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A. A. Valenzuela, P. Russer: High Q coplanar transmission line resonator of YBa 2 Cu 3 O 7− x on MgO. In: Applied Physics Letters, 55(10), 1989, S. 1029-1031
doi:10.1063/1.101576 BibTeX | RIS

A. A. Valenzuela, B. Daalmans, B. Roas: High-Q coplanar transmission line resonator of YBa2Cu3O7−x on LaAlO3. In: Electronics Letters, 25(21), 1989, S. 1435
doi:10.1049/el:19890958 BibTeX | RIS

A. A. Valenzuela: Koplanare Resonanzstrukturen aus Hochtemperatursupraleitern. In: Bergischen Universität Gesamthochschule Wuppertal, Wuppertal, November 1989 – invited seminar, 1989
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J. Hausner, G. R. Olbrich, P. Russer, A. A. Valenzuela: Nonlinear Approach for the Optimization of a DRO at 10.4GHz. In: Proc. 18th European Microwave Conference, Stockholm, Sweden, 12-15 Sept. 1988, 1988, S. 268-273
doi:10.1109/EUMA.1988.333827 BibTeX | RIS