N. D. Alexandru

Lucrari publicate:

Articole publicate in reviste din strainatate:

  1. Cotae, P., Alexandru, N.D., "A Class of Generalized Constant Envelope Shaping Functions", Archiv für Elektronik und Übertragungstechnik, Vol.46, No 2, 1992, p.102-106.

Articole publicate in volumele unor conferinte din strainatate:

  1. Alexandru, N.D., Davideanu, C., Cehan, V., Pancescu, L., "A Thorough Investigation of the Spectra of a Class of Run-Lenght Limited MLT3 Codes", October 4-6, International Conference Controlo'2000, Guimaraes, Portugal
  2. Alexandru, N.D., Cehan, V., Pancescu, L., "Calculating the Autocorrelation Function for mB-nB Codes", First IEEE Balkan Conference on Signal Processing, Communication, Circuits and Systems, June 2-3, 2000, Istanbul, Turkey
  3. Alexandru, N.D., Davideanu, C., Cehan, V., Scripcariu, L., Pancescu, L., "On a Class of Continuous Pulse Shapes", ICT'98 International Conference on Telecommunications, Porto Carras, Greece, 21-25 June 1998, vol. I, p. 208-212.
  4. Cehan, V., Alexandru, N.D., Boariu, A., "An Investigation of Data Transmission Capabilities Using AM Broadcasting Radio Transmitters", ICT'96 International Conference on Telecommunications, Istanbul, Turkey, 1996, vol. I, p. 349-352.
  5. Boariu, A., Cehan, V., Alexandru, N.D., "The AM Detection Analysis of an AM-PM Modulated Signal Assuming a Jump Variation of Carrier frquency; Part I: The Transient Response", ICT'96 International Conference on Telecommunications, Istanbul, Turkey, 1996, vol. II, p. 917-920.
  6. Alexandru, N.D., Boariu, A., Cotae, P.," A Thorough Investigation of MLT-3 Code Spectral Properties", Proceedings Intern. AMSE Conference "Systems Analysis, Control & Design", July 4-6, 1994, Lyon, France, Vol. 2, pp. 121-124.
  7. Boariu, A., Alexandru, N.D., Cotae, P., "Characteristics of Hedeman H-1, H-2 and H-3 Codes", Proceedings Intern. AMSE Conference "Systems Analysis, Control & Design", July 4-6, 1994, Lyon, France, Vol. 2, pp. 129-132.
  8. Cotae, P., Scripcariu, L., Alexandru, N.D., "Computer Simulation and Automatic Identification of Digitally Modulated M-ary PSK Signals", Proc. Intern. AMSE Conference "Systems Analysis, Control & Design", July 4-6, 1994, Lyon, France, Vol. 2, pp. 95-98.
  9. Scripcariu, L., Alexandru, N.D., Cotae, P., "An Investigation of an 1/2 Run-Length- Limited Code (0;6;2)", Proceedings Intern. AMSE Conference "Systems Analysis, Control & Design", July 4-6, 1994, Lyon, France, Vol.2, pp. 113-119
  10. Alexandru, N.D., Boariu, A., Cotae, P., Alexandru, M.L., "A Novel Technique for Decoding Split-Phase Coded Data Signals", Proceedings Intern. AMSE Conference "Systems Analysis, Control & Design", July 4-6, 1994, Lyon, France, Vol. 2, pp. 125-128.
  11. Cotae, P., Scripcariu, L., Alexandru, N.D., R. Cotae, "Trellis Biphase M(S) Coded Data", Proceedings Intern. AMSE Conference "Systems Analysis, Control & Design", July 4-6, 1994, Lyon, France, Vol. 2, pp. 99-104.
  12. Cotae, P., Scripcariu, L., Alexandru, N.D., "Bit Error Rate Evaluation of Miller Line Code Based on Trellis Structure", Proceedings Intern. AMSE Conference "Systems Analysis, Control & Design", July 4-6, 1994, Lyon, France, Vol. 2, pp. 105-111
  13. M. Antoniu, Alexandru, N.D., E. Antoniu "A tri-axis electrostatic field trans-ducer", IMEKO XIII, Torino, Italy, 1994, p. 2621-2626.
  14. Alexandru, N.D., Scripcariu, L., Cotae, P., "A Generalization of Sinusoidal Frequency Shift Keying Signal", Proceedings of the International 93 Moscow A.M.S.E. Conference "Signals & Data", Moscow Russia, June 1993, p. 23-34.
  15. Alexandru, N.D., Boariu, A., "An Investigation of the Spectral Properties of a Coding Circuit Using a T-type Flip Flop", Proceedings of the International 93 Moscow A.M.S.E. Conference "Signals & Data", Moscow Russia, June 1993, p.35-38.
  16. Alexandru, N.D., Cotae, P., "A New Modified M2 Code", Second International Seminar "Measurement Systems and Networks", Gliwice, Poland, Sept. 23-25, 1992, p.180-183
  17. Cotae, P., Alexandru, N.D., "Contribution to the Study of Power Spectral Density of Digitral Phase Keying Modulation with M-ary Alphabets", Second International Seminar "Measurement Systems and Networks", Gliwice, Poland, Sept. 23-25, 1992, p. 54-62
  18. Cotae, P., Alexandru, N.D., s.a., "Contribution to the Study of Constant Envelope Modulation Techniques Based on the Efficiency Bandwidth", Proc. COMCONEL 91 Conference, Cairo, Egypt, 1991, Conference Record, Part 1, p. 84-90.
  19. Cotae, P., Croitoru V., Alexandru, N.D., "A Generalized Form of Constant Envelope Modulation Functions", Proc. COMCONEL 91 Conference, Cairo, Egypt, 1991, Conference Record, Part 1, p. 28-31.
  20. Alexandru, N.D., e.a., "About Alcodem Coding", Proc. COMCONEL 90 Conference, Cairo, Egypt, 1990, p.101.
  21. Alexandru, N.D., e.a., "Power Spectral Density of a Delay-Modulation Coded Random Data Sequence", Proc. COMCONEL 90 Conference, Cairo, Egypt, 1990, p.83.
  22. Alexandru, N.D., "Some Relations Among Binary Codes", 4th Symposium "Stefan Odobleja", Iasi, June, 13-15, 1986, "Consonantics", Nagard, Milano, Italy, 1986, p. 200-202.

Reviste in tara:

  1. Alexandru, N.D., Cehan, V., "An Complete Investigation of Spectral Properties of Some Alphabetic Codes", Buletinul Institutului Politehic din Iasi - sectia III - Electrotehnica, Energetica, Electronica, tom. XLIV (XLVIII), fasc. 1-2, 1999
  2. Cehan, V., Alexandru, N.D., "CAD Systems for PCB Need Human Helpers", Buletinul Institutului Politehic din Iasi - sectia III - Electrotehnica, Energetica, Electronica, tom. XLIV (XLVIII), fasc. 3-4, 1998
  3. Cehan, V., Alexandru, N.D., "On Transient Envelope Distorsions in Simultaneous AM Audio and FM of the RF Carrier Data Transmission", Buletinul Institutului Politehic din Iasi - sectia III - Electrotehnica, Energetica, Electronica, tom. XLIV (XLVIII), fasc. 3-4, 1998
  4. Duma, P., Alexandru, N.D., Scripcariu, L., "Defining the audio-conference telephone service in a low capacity electronic telephone exchange based on spatial switching", Acta Tehnica Napocensis, Electronics and Telecommunications, Vol.38, No 1, pp.9-12, 1998
  5. Cehan, V., Alexandru, N.D., "Analysis of RF signal envelope distortions in AM radio receivers in combined AM audio and FM data transmission", Acta Tehnica Napocensis, Electronics and Telecommunications, Vol.38, No 1, p.20-25, 1998
  6. Cehan, V., Alexandru, N.D., "Some methods for superimposing data on amplitude modulated radio signals", Acta Tehnica Napocensis, Electronics and Telecomms., Vol.38, No 2, p.16-21, 1998.
  7. Alexandru, N.D., "An Investigation of the Power Spectrum of AMSI Codes", Bulletin IPI, tome XVI (XLV), Fasc. 3-4, Sect.III, p. 59-62, 1995.
  8. Alexandru, N.D., "A Modified M3 Coder", Bulletin IPI, tome XLI (XLV), Fasc. 1-2, Sect.III, p. 47-50, 1995.
  9. Alexandru, N.D., "Combined Delay Modulation and Correlative Coding", Bulletin IPI, tome XLI (XLV), Fasc. 1-2, Sect.III, p. 41-46, 1995.
  10. Alexandru, N.D., "A New Code Based on Delay Modulation", Bulletin IPI, in print.
  11. Alexandru, N.D., Cehan, V., Galeata, L, Toderica, V.V., "A New Family Of Constant Envelope CSK Signals", Buletinul Stiintific al Univ."Politehnica" din Timisoara, Proc. of the Symposium on Electronics and Telecommunications, Sept. 26-27, 1996, vol. II, pp. 41-46.
  12. Alexandru, N.D., s.a., "A Simplified Decoder For DM Coded Data", Bulletin IPI, tome XL (XLIV), Fasc. 1-4, Sect. III, p. 87-90, 1994.
  13. Alexandru, N.D., s.a., "A Modified M2 Decoder", Bulletin IPI, tome XL (XLIV), Fasc. 1-4, Sect. III, p. 83-86, 1994.
  14. Alexandru, N.D., s.a., "Synthesis of a CMI Coder", Bulletin IPI, tome XXXVI (XL), Fasc. 3-4, Sect. III, p. 65-68, 1990.
  15. Alexandru, N.D., e.a., "About Bi-phase Decoding", Bulletin IPI, tome XXXIV (XXXVIII), Fasc. 1-4, Sect. III, p. 43-46, 1988.
  16. Alexandru, N.D., e.a.,"Synthesis of a Bi-phase M Coder with a Symbolic Method", Bulletin IPI, tome XXVII (XXXI), Fasc. 3-4, Sect. III, p. 97-100, 1981.
  17. Duma, P., Alexandru, N.D., Scripcariu, L., "Defining the audio-conference telephone service in a low capacity electronic telephone exchange based on spatial switching", Acta Tehnica Napocensis, Electronics and Telecommunications, Vol. 38, No. 1, p. 9-12, 1998
  18. Cehan, V., Alexandru, N.D., "Analysis of RF signal envelope distortions in AM radio receivers in combined AM audio and FM data transmission", Acta Tehnica Napocensis, Electronics and Telecommunications, Vol. 38, No. 1, p. 20-25, 1998
  19. Cehan, V., Alexandru, N.D., "Some methods for superimposing data on amplitude modulated radio signals", Acta Tehnica Napocensis, Electronics and Telecommunications, Vol. 38, No. 2, p.16-21, 1998
  20. Cotae, P., Alexandru, N.D., "Some General Remarks on Smoothed Shaping Functions", Bulletin IPI, tome XXIX (XLIII), Fasc. 1-4, Sect.III, p.39-44, 1993.
  21. Cotae, P., Alexandru, N.D., "A Class Of Generalized Constant Envelope Shaping Functions", Bulletin IPI, tome XXIX (XLIII), Fasc. 1-4, Sect.III, p.33-38, 1993.
  22. Imad, F.M., Alexandru, N.D., "A New Bi-phase S Coding Technique", Bulletin IPI, tome XXXVIII (XLII), Fasc. 1-4, Sect.III, p.39-41, 1992.
  23. Cotae, P., Alexandru, N.D., "Spectral Width of MSK-type Signalling Waveforms Used in QAM Systems", Bulletin IPI, tome XXXVII (XLI), Fasc. 1-4, Sect. III, p. 57-61, 1991.
  24. Cotae, P., Alexandru, N.D., "Performance Evaluation of Spectral Bandwidth of Some Typical Constant Envelope Signalling Waveforms Used in Digital FM", Bulletin IPI, tome XXXVIII (XLII), Fasc. 1-4, Sect. III, p.17-26, 1991.
  25. Cosma, V. Alexandru, N.D., "Synthesis of Some Triangular Waveforms", Bulletin IPI, tome XXX (XXXIV), Fasc. 1-4, Sect. III, p. 25-30, 1985.
  26. Haba, P., Alexandru, N.D., Cosma, V., "On the Possibility of Using Ring-Core Flux-Gate Circuit as a Thickness Transducer", Bulletin IPI, tome XXIV (XXVIII), Fasc. 1-2, Sect. III, p. 95-99, 1978.
  27. Munteanu V., Alexandru, N.D., "The Synthesis of Linear Automatic Systems with Time-Varying Parameters (II)", Bulletin IPI, tome XXII (XXVI), Fasc. 3-4, Sect. III, p.51-55, 1976.
  28. Munteanu V., Alexandru, N.D., "Transfer Functions Attached to Linear Automatic Systems with Time-Varying Parameters (II)", Bulletin IPI, tome XXI (XXV), Fasc. 1-2, Sect. III, p.73-77, 1975.
  29. Haba, P., Alexandru, N.D., Cosma, V., "The Influence of the Frequency on the Operation of the Self-Saturating Ring-Core Flux-Gate Push-Pull Circuits", Bulletin IPI, tome XX (XXIV), Fasc. 1-2, Sect. III, p. 46-50, 1974.
  30. Munteanu V., Alexandru, N.D., "The Synthesis of Linear Automatic Systems with Time- Varying Parameters (I)", Bulletin IPI, tome XX (XXIV), Fasc. 3-4, Sect. III, p. 69-74, 1974.
  31. Munteanu V., Alexandru, N.D., "Transfer Functions Attached to Linear Automatic Systems with Time-Varying Parameters (I)", Bulletin IPI, tome XX (XXIV), Fasc. 1-2, Sect. III, p.71-79, 1974.
  32. Cosma, V., Alexandru, N.D., Haba, P., "Adjustable Frequency-Type Magnetic Coupled Multivibrator with Single Phase Output", Bulletin IPI, tome XIX (XXIII), Fasc. 3-4, Sect. III, p. 61-66, 1973.

Conferinte internationale si nationale organizate in tara:

  1. Alexandru, N.D., "A Complete Charcaterization of Some HDBn Codes", Proc. of Int. Conference "Development and Application Systems", Suceava, 23-25 May 2002, p. 206-212
  2. Alexandru, N.D., Voukalis, D., Cehan, V., Scripcariu, L., "Spectral Shaping with T-type Flip Flops", Proc. of Int. Conference "Development and Application Systems", Suceava, 23-25 May 2002, p. 213-218
  3. Cehan, V., Bozomitu., R., Alexandru, N.D., "Using BJT as a Controlled Resistor in the Saturated Regime of Functioning", SITME' 2001, Bucharest, Romania, September 21-23 2001
  4. Alexandru, N.D., Cehan, V., Scripcariu, L., Voukalis, D., "A New Family of Minimum-Bandwidth Line Codes for High-Speed Twisted Pair Data Links", ICT'2001 International Conference on Telecommunications, Bucharest, Romania, (on CD)
  5. Alexandru, N.D., Scripcariu, L., Cehan, V., Giurgiu, C., "A Generalization of Q2PSK Signals", Proc. of Int. Conference "Development and Application Systems", Suceava, 18-20 May 2000, p. 241-247
  6. Alexandru, N.D., Cehan, V., Pancescu, L., "An Evaluation of Spectral Properties for Some Minimum-Bandwidth Line Codes", Proc. of Int. Conference "Development and Application Systems", Suceava, 18-20 May 2000, p. 248-251.
  7. Scripcariu, L., Alexandru, N.D., Cehan, V., Pancescu, L., "Spectral Analysis of GQ2PSK Signals", International Conference COMMUNICATIONS'2000, Dec.7-9, 2000, Bucharest, Romania, p.206-209
  8. Alexandru, N.D., Cehan, V., Pancescu, L., "An Extended Method for Calculating the Autocorrelation Function for 1I-2O Codes Based on Entry and Departure Matrices", International Conference COMMUNICATIONS'2000, Dec.7-9, 2000, Bucharest, Romania, p.55-58
  9. Alexandru, N.D., Pancescu, L, Cehan, V., "A Survey of Block Line Codes with Spectral Nulls Generated by Multirate Digital Filters", Proceedings of the International Symposium SCS'99, p.307-310, Iasi, July 6-7,1999.
  10. Cehan, V., Alexandru, N.D, Bozomitu, R., Abdallah Al-Sliahat, "On Data Transmission Using AM Radio Transmitters with Frequency Modulation of the Carrier ", Proceedings of the "Development and Application Systems" Conference, Suceava, 21-23 May 1998, number 10, pp. 17-20.
  11. Scripcariu L., Alexandru N.D., "Binary Image Compression Based on Huffman Coding", Proceedings of the International Conference "Development and Application Systems", Suceava, 21-23 May 1998, number 10, pp.97-102;
  12. Alexandru, N.D., Scripcariu, L, Cehan, V., Butnaru, O., Lungu, C.,"On Some DC-Constrained Line Codes for ADSL Use", International Conference COMMUNICATIONS'98, Nov.19-20, 1998, Bucharest, Romania, pp.211-214.
  13. Alexandru, N.D., Davideanu, C. P\ncescu, L., "On a Class of Convoluted Cosine Pulses", International Conference COMMUNICATIONS'98, Nov.19-20, 1998, Bucharest, Romania, pp.313-318.
  14. Alexandru, N.D., Cehan, V., "A Complete Spectral Characterisation of mB1C Codes", Proceedings of the International Conference "Development and Application Systems", Suceava, 21-23 May 1998, number 10, p. 1-4.
  15. Alexandru, N.D., Cehan, V., Scripcariu, L., Paliciuc, M., Tanase, C., "An Optimization of the TSFSK Signal", SCS'97, International Symposium on "Signals, Circuits & Systems", Oct. 2-3,1997, Iasi, Romania, p.484-487.
  16. Alexandru, N.D., Galeata, L, Giurgiu, C., Cehan, V., "An Investigation of Spectral Properties for a Particular Class of CSK Signals", Proceedings of the International Conference "Development and Application Systems", Suceava, 23-25 Mai 1996, p. 3-6.
  17. Alexandru, N.D., Galeata, L, "About a New Algorithm for Minimum Hamming Distance Estimation of Convolutional Codes", Proceedings of the International Conference "Development and Application Systems", Suceava, 23-25 Mai 1996, p. 7-10.
  18. Alexandru, N.D., Cehan, V., Galeata, L, Toderica, V.V., "A New Family Of Constant Envelope CSK Signals", Buletinul Stiintific al Univ."Politehnica" din Timisoara, Proc. of the Symposium on Electronics and Telecommunications, Timisoara, Sept. 26-27, 1996, vol. II, pp. 41-46.
  19. Alexandru, N.D., Cehan, V., Galeata, L, "Differential Coherent Detection of Generalized SFSK Signals", IEEE International Symposium on COMMUNICATIONS'96, Nov.27-29, 1996, Bucharest, Romania, pp.291-296.
  20. Alexandru, N.D., Cehan, V , Boariu, A., "A bout RF Signal E nvelope Distortion in Data Transmission On A Harmonic Subcarrier Using Am Radio Transmitters", SCS'95, International Symposium on "Signals, Circuits & Systems", Oct. 19-21,1995, Iasi, Romania, p.245-248.
  21. Alexandru, N.D., P. Cotae, "About a Technique for Obtaining Bi-phase M (S) Coded Data", Proceedings of the International Conference "Development and Application Systems", Suceava, 26-28 Mai 1994, p. 15-18.
  22. Alexandru, N.D., Cotae, P.,"Decoder for Delay-Modulated Data", Proceedings of the International Conference "Development and Application Systems", Suceava, 26-28 Mai 1994, p. 19-22.
  23. Alexandru, N.D., Boariu, A., "A Novel Technique for Obtaining DM Coded Data", Seminarul de Bazele Electronicii SBE'94, Universitatea Tehnica din Cluj-Napoca, 27-28 Octombrie 1994.
  24. Alexandru, N.D., "Spectral Shaping of Data Signals Using Some Simple Coding Circuits", Scientific Session "Developing Systems & Applications", Suceava, May 28-30 1992, tome 2, p.43-46.
  25. Alexandru, N.D., "About Two Ternary Miller-Based Codes", Proceedings of the International Conference "Development and Application Systems", Suceava, May 28-30 1992, tome 2, p.39-42.
  26. Alexandru, N.D., "Visualising ROM Content on a Scope", Symposium of Electronic Technology and Reliability, Iasi, Dec. 1-3, 1983, tome 2, p.911-920.
  27. Alexandru, N.D., "Synthesis of a Differential Coder", Second National Symposium on Systems Theory, Craiova, 1982, p.60-63.
  28. Alexandru, N.D., "Synthesis of a Miller Coding Circuit", Electrical Engineering Faculty Session, Craiova, 27-28 November, 1981, p. H89-93.
  29. Alexandru, N.D., "Synthesis of a RZ Decoder", First National Symposium on Systems Theory, Craiova, 14-15 November, 1980, tome 2, p. 376-379.
  30. Alexandru, N.D., e.a.,"Synthesis of a CMI Decoder", IPI Jubiliar Session, Nov. 10-12, 1988, vol.4, p.327-330.
  31. Alexandru, N.D., e.a., "On a M2 (Modified Miller) Coder ", CNETAC Works (National Symposium on Electronics, Communications, Automation and Computers), December 7-9, 1988, tome 2, p. 215-217
  32. Alexandru, N.D., e.a., "Synthesis of a Digital PSK Modulator for a TOR-ARQ System ", IPI Session, May 16-17, 1986, Sect. 9, p.9-14.
  33. Alexandru, N.D., e.a., "On the Realization of a FSK Modulator for a TOR-ARQ System", ICSITE Session "Adavances in Professional Electronics", Snagov, Sept. 8, 1984, tome 2, p.16-20.
  34. Alexandru, N.D., e.a.,"Synthesis of the Decoding Circuit for Bi-impulse Codes", Symposium of Electronic Technology and Reliability, Iasi, December 1-3, 1983, tome 2, p.299-306.
  35. Alexandru, N.D., e.a.,"On a 5-6 bit Coding for a QAM Data Transmission System ", Symposium of Electronic Technology and Reliability, Iasi, Dec. 1-3, 1983, tome 2, p.299-306.
  36. Alexandru, N.D., e.a., "On Bi-phase Coding Realization Using Programmed Logic", Second National Symposium on Systems Theory, Craiova, 1982, p.54-59.
  37. Alexandru, N.D., e.a., "On Implementing Miller Coding in Programmed Logic", CNETAC Works (National Symposium on Electronics, Communications, Automation and Computers), November 17-19, 1982, tome 2, p3.89-95.
  38. Alexandru, N.D., Cehan, V., "On the Indicative and Message Separating Block in the ITCCT Central Station", Session de l'ICPTT, 23-25 Avril, 1981, tome 1, p. 317-322.
  39. Alexandru, N.D., Cehan, V., "Structure of the ITCCT Central Station", Session de l'ICPTT, 23-25 Avril, 1981, tome 1, p. 311-316.
  40. Alexandru, N.D., e.a., "Synthesis of a Pseudoternary Coder", Electrical Engineering Faculty Session, Craiova, 27-28 November, 1981, p. H79-82.
  41. Alexandru, N.D., e.a., "Synthesis of a PST Coder", Electrical Engineering Faculty Session, Craiova, 27-28 November, 1981, p. H83-88.
  42. Alexandru, N.D., Cosma, V., "On a Method of Obtaining Quadrature Signals", Electrical Engineering Faculty Session, Craiova, 27-28 November, 1981, p. C17-20.
  43. Alexandru, N.D., e.a., "Synthesis of a Bi-impulse No. 2 Decoder", First National Symposium on Systems Theory, Craiova, 14-15 November, 1980, tome 2, p. 370-375.
  44. Alexandru, N.D., e.a., "On FFSK Modulation for Digital transmission with Mobile/ Portable Radiotelephones", First National Symposium on Radiotelephony, Iasi, p.18-19.
  45. Alexandru, N.D., Cehan, V., "Converteur FSK - binaire avec un circuit PLL", Session jubiliaire de l'ICPTT, Bucharest, 9-12 Mai, 1979, tome 3, p. 71-76.
  46. Alexandru, N.D., e.a.., "Logic Block of a Digital Transmission Installation for Railroad Despatching", Session jubiliaire de l'ICPTT, Bucharest, 9-12 Mai, 1979, tome 3, pp. 77-84.
  47. Cehan, V., Alexandru, N.D., Bozomitu, R., Abdallah Al-Sliahat, "On Data Transmission Using AM Radio Transmitters with Frequency Modulation of the Carrier ", Proceedings of the "Development and Application Systems" Conference, Suceava, 21-23 May 1998, number 10, p. 17-20.
  48. Scripcariu L., Alexandru N.D., "Binary Image Compression Based on Huffman Coding", Proceedings of the International Conference "Development and Application Systems", Suceava, 21-23 May 1998, number 10,, pp.97-102;
  49. Cehan, V., Alexandru, N.D., Abdallah Al-Sliahat, "Overruling Transient Envelope Distortions in Simultaneous AM Audio Broadcast and FM Data TRansmission", SCS'97, International Symposium on "Signals, Circuits & Systems", Oct. 2-3,1997, Iasi, Romania, p.292-295.
  50. Scripcariu, L., Alexandru, N.D., Duma, P., " Generalized Window Functions for Digital Modulation Techniques", SCS'97, International Symposium on "Signals, Circuits & Systems", Oct. 2-3,1997, Iasi, Romania, p.476-479.
  51. Galeata, L, Alexandru, N.D., "Asymmetrical Run-Length Limited Codes", Proceedings of the International Conference "Development and Application Systems", Suceava, 23-25 Mai 1996, p. 33-38.
  52. Galeata, L, Alexandru, N.D., Cehan, V., "An Approximate Method for Computing the Power Spectral Density of Digital Phase-Modulated Signals", Proceedings of the International Conference "Development and Application Systems", 23-25 Mai 1996, p. 39-44.
  53. Cehan, V., Alexandru, N.D., Albulet, M., "Overcoming Difficulties in Data Transmission Using AM Radio transmitters with PSK Modulation of the Carrier (I si II)", Proceedings of the International Conference "Development and Application Systems", Suceava, 23-25 Mai 1996, p. 19-32.
  54. Scripcariu, L., Alexandru, N.D., Duma, P, "Asymmetrical Constrained Codes for Binary Optical Channel", IEEE International Symposium on COMMUNICATIONS'96, Nov.27-29, 1996, Bucharest, Romania, pp.40-45.
  55. Scripcariu, L., Alexandru, N.D., "Performances of QAM Signals in Rayleigh Fading", IEEE International Symposium on COMMUNICATIONS'96, Nov.27-29, 1996, Bucharest, Romania pp.278-284.
  56. Cehan, V., Alexandru, N.D., Boariu, A., "Using Existing AM Radio Transmitters for Data Transmission On A Harmonic Subcarrier", SCS'95 International Symposium on "Signals, Circuits & Systems", Oct. 19-21,1995, Iasi, Romania, p.241-244.
  57. Cehan, V., Alexandru, N.D., Boariu, A., "Using Am Radio Transmitters For Data Communications", SCS'95 International Symposium on "Signals, Circuits & Systems", Oct. 19-21,1995, Iasi, Romania, p.237-240
  58. Galeata, L., Alexandru, N.D., "Generalized Cosine Window Function", SCS'95 International Symposium on "Signals, Circuits & Systems", Oct. 19-21,1995, Iasi, Romania, p.213-216.
  59. Boariu, A., Alexandru, N.D., "Some Considerations About Q2PSK Modulation", SCS'95 International Symposium on "Signals, Circuits & Systems", Oct. 19-21,1995, Iasi, Romania, p.153 156.
  60. Boariu, A., Alexandru, N.D., "Transition Probability Matrix and its Behaviour to Infinity", Proceedings of the International Symposium on Signals, Circuits and Systems SCS'93, Iasi, Romania, Nov. 4-5, 1993, p. 223-226
  61. Boariu, A., Alexandru, N.D., "A 3D Representation of P.S.D. for Some Line Codes", Proceedings of the International Symposium on Signals, Circuits and Systems SCS'93, Iasi, Romania, Nov. 4-5, 1993, p. 240-243.
  62. Cotae, P., Alexandru, N.D., "On MSK Signals", IPI Jubiliar Session, Nov. 10-12, 1988, vol.4, p.338-344.
  63. Cotae, P., Alexandru, N.D., "Considerations on the MF Signals Spectra", CNETAC Works (National Symposium on Electronics, Communications, Automation and Computers), December 7-9, 1988, tome 2, p 3.158-166.
  64. Cotae, P., Alexandru, N.D., e.a., "On Digital Echo Modulation", IPI Session, May 16-17, 1986, Sect.9, p.15-20.
  65. Cotae, P., Alexandru, N.D., e.a., "Radio-Telegraphic Keyer with Eprom Memory", IPI Session, May 16-17, 1986, Sect.9, p.41-45.
  66. Dincescu, V., Cehan, V., Alexandru, N.D., e.a.,""Digital Transmission of Train Despatching Using Portable Radiotelephone Equipment", Symposium "Cybernetic Island Videle", Bucharest, 19-20 Mai, 1983, tome 3, p. 70-79.
  67. Cehan, V., Alexandru, N.D., e.a., "Emploi des boucles à verrouillage de phase (PLL) dans les générateurs de signaux CPFSK", Symposium de technologie électronique et fiabilité, IPI, Iasi, 1-3 Déc. 1983, p. 295-299.
  68. Cehan, V., Alexandru, N.D., e.a., "Génération de signaux MSK par la synthèse de la sinusoide par segments de droite", idem, p. 317-325.
  69. Alexa, D., Turic, L., Alexandru, N.D., "Static Frequency Converter", Symposium of Electronic Technology and Reliability, Iasi, Dec. 1-3, 1983, tome 2, p.751-755.
  70. Cosma, V. Alexandru, N.D., "Synthesis of Some Waveforms with Imposed Shape", Electrical Engineering Faculty Session, Craiova, 27-28 November, 1981, p.C21-29.
  71. Picos, C., Slatineanu, L., Gramescu, T., Alexandru, N.D., "Tensometrie und Zerspannbarkeit", Works of the First National Tensometry Symposium, Iasi, vol.3, p. 395-402.
  72. Cehan, V., Alexandru, N.D., "Sur les installations pour les transmission des données dans les triages férroviaires", Session jubiliaire de l'ICPTT, Bucharest, 6-12 Mai, 1979, tome 3, pp. 63-70.

Carti

  1. Alexandru, N.D., Morgenstern, G., Digital Line Codes and Spectral Shaping, Editura Matrix ROM, Bucuresti, 1998 ISBN 973-9390-44-7, 200 p.
  2. Alexandru, N.D., Cotae, P., Telegrafie si transmisiuni de date, Rotaprint, Iasi, 1987, 350 p.
  3. Alexandru, N.D., Cotae, P., Tehnica moderna a telecommunicatiilor, Rotaprint, Iasi, 1990, 350 p.

In curs de elaborare - Alexandru, N.D., Dae Young Kim (InfoCom Eng. Dept., Chungnam Nat. Univ., Daejeon 305-764 South KOREA), Spectral Shaping via Coding.

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