Thesis:
1. Ph.D. Thesis: "Contributions to the study of digital techniques used in radiocommunications", Departament of Telecommunications, Gh. Asachi Technical University of Iași, Romania, 2009, (In Romanian)
Advisor: Professor Nicolae Dumitru Alexandru
Books/Chapters:
2. N.D. Alexandru, A.L. Onofrei, Improved Nyquist Pulses, ed. Politehnium, Iaşi, 2009, ISBN 978-973-621-275-8.
1. I. Chiuchișan, A.L. Onofrei, Proiectarea în limbaje de descriere hardware
Aplicaţii Verilog HDL, ed. Cermi, IAŞI, 2009, ISBN 978-973-667-361-0
Journal Publications:
12. N.D. Alexandru, A.L. Balan (reprint author), "ISI-free pulse with piecewise exponential frequency characteristic," AEU - International Journal of Electronics and Communications, 70, (8), pp. 1020–1027, 2016, F.I = 0.601, S.R.I. =0.642,
DOI:10.1016/j.aeue.2016.04.014
11. A.L. Balan, N.D. Alexandru, "Construction of new ISI-free pulses using a linear combination of two polynomial pulses," Telecommunications Systems, 59, (4), pp. 469-476, 2015, F.I = 0.705, S.R.I. =0.754,
DOI:10.1007/s11235-014-9907-2
10. A.L. Balan, N.D. Alexandru, "Improved Nyquist Pulses Produced By A Filter with Senary Piece-wise Polynomial Frequency Characteristic" Advances in Electrical and Computer Engineering, 14, (2), pp. 129-134, 2014, F.I. = 0.642,
DOI: 10.4316/AECE.2014.02021
9. N. D. Alexandru, A. L. Balan (reprint author),"Investigation of the Mechanism of Improvement in Improved Nyquist Filters", IET Signal Processing, 8, (1), pp. 95–105, 2014, F.I = 0.714, S.R.I. = 0.887,
DOI: 10.1049/iet-spr.2013.0050
8. A.L. Balan, N.D. Alexandru, "Two Improved Nyquist Filters with Piece-Wise Rectangular-Polynomial Frequency Characteristics," AEUE-International Journal of Electronics and Communication, 66, (11), , pp, 880–883, 2012, F.I.=0.551; S.R.I.=0.62457,
DOI: 10.1016/j.aeue.2012.03.006
7. N. D. Alexandru, A.L. Onofrei Balan, (reprint author), "Improved Nyquist Filters with Piece-wise Parabolic Frequency Characteristic," IEEE Communication Letters, 15, (5), pp. 473-475, 2011, F.I.=1.16, S.R.I.=1.73038,
DOI: 10.1109/LCOMM.2011.030911.102065
6. N. D. Alexandru, A.L. Balan, (reprint author), "ISI-free pulses produced by improved Nyquist filter with piece-wise linear characteristic", Electronics Letters, 47, (4), pp. 256–257, 2011, F.I.=1,038, S.R.I.=0.97375, DOI: 10.1049/el.2010.3287
5. N.D. Alexandru, A.L. Onofrei (reprint author), "Improved Nyquist Filter With an Ideal Piece-Wise Rectangular Characteristic", AEUE-International Journal of Electronics and Communication, 64, (8), pp. 766-773, 2010, F.I.=0.551;
S.R.I.=0.62457,
DOI: 10.1016/j.aeue.2010.01.006
4. N.D. Alexandru, A.L. Onofrei (reprint author), "ICI Reduction in OFDM Systems Using Phase Modified Sinc Pulse", Wireless Personal Communications, 53, pp.
141–151, 2010, F.I.=0.428, S.R.I.=0.48123,
DOI:10.1007/s11277-009-9675-6
3. A.D. Potorac, A. Onofrei, D. Balan, "An Efficiency Optimization Model for 802.11 Wireless Communication Channels", Electronics and Electrical Engineering, 97, pp. 67-72, 2010, F.I.=0.441,
DOI:
2. A.L. Onofrei, N.D. Alexandru, "Improved Nyquist Filter Characteristics Using Spline Interpolation", Annals of Telecommunication, 64, (11-12), pp. 793-799, 2009, F.I.=0.567, S.R.I.=0.50853,
DOI 10.1007/s12243-009-0111-4
1. A.L. Onofrei, N.D. Alexandru, "An Investigation Of ISI And ICI Properties For A Family Of Offset Ramp Improved Nyquist Filters", Acta Tehnica Napocensis, 48, (1), pp. 13-20, 2007, ISSN 1221-6542
Conference Publications:
13. N.D. Alexandru, A.L Balan, "Design and Optimization of Modified K-Exponential Filter", The 12-th International
Conference on Communications, (COMM 2018), Bucharest, Romania, June 2018, pag. 71-74,
DOI:10.1109/ICComm.2018.8484806
12. N.D. Alexandru, A.L. Balan, "An analysis of improved Nyquist pulses based on Pearson distance," The 14-th International Conference on Development and Application Systems (DAS 2018), Suceava, Romania, May 2018, pag. 83-87,
DOI: 10.1109/DAAS.2018.8396076
11. N.D. Alexandru, A.L. Balan, "A Generalization of Raised Cosine Pulses," The 13-th International Conference on Development and Application Systems (DAS 2016), Suceava, Romania, May 2016, pag. 139-142,
DOI: 10.1109/DAAS.2016.7492563
10. A.L Balan, N.D. Alexandru, "Inter-symbol Interference Free Pulses for Transmission Over Intensity-Modulated Channels", The 10-th International
Conference on Communications, (COMM 2014), Bucharest, Romania, May 2014, pag. 179-182,
DOI:10.1109/ICComm.2014.6866679
9. N.D. Alexandru, A.L. Balan, "Optimization of an Improved Nyquist Filter With Piece-Wise Polynomial Frequency Characteristic", The 12-th International Conference on Development and Application Systems (DAS 2014), Suceava, Romania, May 2014, pag. 122-126,
DOI:10.1109/DAAS.2014.6842428
8. N.D. Alexandru, A.L. Balan, "Optimization of a Square-Root Nyquist Filter with Staircase Frequency Characteristic", Proceedings of the The 4-th International Symposium on Electrical and Electronics Engineering, (ISEEE 2013), Galați, Romania, 11 - 13 October 2013, pp. ,
DOI:10.1109/ISEEE.2013.6674319
7. N.D. Alexandru, A.L. Balan, F. Diaconu; "Square-Root Improved Nyquist Filter with a Piece-wise Rectangular Frequency Characteristic”, Proceedings of The 11-th International Symposium on Signals, Circuits and Systems (ISSCS 2013), Iași, Romania, 11-12 Iuly 2013, pp. ,
DOI:10.1109/ISSCS.2013.6651180
6. N.D. Alexandru, A.L. Balan, F. Diaconu, M. Dimian, "Development of
Improved Nyquist Filters with Piecewise Linear Frequency Characteristics",
Proceedings of The 36th International Conference on Telecommunications and Signal
Processing (TSP 2013), Rome, Italy, 2-4 Iuly 2013,
pp. 681-684,
DOI: 10.1109/TSP.2013.6614023
5. A.L. Balan, N.D. Alexandru, "ISI-free pulses produced by a linear combination of two polynomial pulses", Proccedings of The 35th International Conference on Telecommunications and Signal Processing, (TSP 2012),Praga, Republica Cehă, 3-4 Iuly 2012, pp. 182-185,
DOI: 10.1109/TSP.2012.6256278
4. A.L. Balan, N.D. Alexandru, "Improved Nyquist Filters with Piecewise
Rectangular-Sine Frequency Characteristics", The 9-th International Conference on
Communications (COMM 2012), Bucharest, Romania, 21-23 Iune 2012, pp. 67-70,
DOI: 10.1109/ICComm.2012.6262550
3. A.L. Balan, N.D. Alexandru, "Construction of the New Improved Nyquist Filters Using Interpolation with Polynomial Functions", The 10-th International Symposium on Signals, Circuits and Systems", (ISSCS 2011), Iaşi, Romania, 30 June – 1 July 2011, pp. 261-264,
DOI: 10.1109/ISSCS.2011.5978709
2. A.L. Onofrei, N.D. Alexandru, "The effect of ICI in OFDM Systems Using Improved Phase Modified Sinc Pulse", The 9-th International Symposium on Signals, Circuits and Systems, (ISSCS 2009), Iaşi, Romania, 9-10 July 2009, pp. 275 -278,
DOI:10.1109/ISSCS.2009.5206095
1. A.L. Onofrei, N.D. Alexandru, "An Investigation of the Improved Nyquist Pulses Families For OFDM Use", The 8-th International Symposium on Signals, Circuits and Systems, (ISSCS 2007), Iași, Romania, July 2007, pp. 593-596,
DOI:10.1109/ISSCS.2007.4292795
