School of Electrical and Computer Engineering

Said Nader-Esfahani

School of Electrical & Computer Engineering

Professor

Email: nader [AT] ut.ac.ir

Personal Website:

Education

Ph.D.: Electronic Engineering, University of Essex, ENGLAND, 1978
M.Sc.: Telecommunication Engineering, University of Essex, ENGLAND, 1975
B.Sc.: Electrical Engineering, Faculty of Engineering, University of Tehran, IRAN, 1970

Research Interests

Equalizations
Digital Communication Systems
Approximation and Synthesis of Filters
Applications of Cyclostationarity in Signal Processing
Applications of HOS in Signal Processing
Adaptive Filters

Current Researches

OFDM Systems
Blind Equalizatios
Ultra Wideband Systems

Courses

Communication II
Filter Design and Synthesis
Stochastic Processes

Selected Publications

1) A. Ghasemi and S. Nader-Esfahani, "Nonlinear Pulse Combining in Impulse Radio UWB Systems," IET Communications. Volume 1, Issue 6, December 2007, pp. 1289-1295.

2) S. Nader-Esfahani, M. Afrasiabi, "Simple Bit Loading Algorithm for OFDM-Based Systems," IET Communications. Volume 1, Issue 3, June 2007, pp. 312-316.

3) A. Ghasemi, S. Nader-Esfahani, "Exact probability of connectivity one-dimensional ad hoc wireless networks," IEEE Communication Letters, Volume 10, Issue 4, Apr 2006 pp. 251-253

4) A. Olfat and S. Nader-Esfahani, "A New Signal Subspace Processing for DOA Estimation," Elsevier Signal Processing, Vol. 84, No. 4 , April 2004, pp 721-728.

5) A. Olfat and S. Nader-Esfahani, "New Receiver for Multiuser Detection of CDMA Signals with Antenna Arrays," IEE Proc.-Communications., Vol. 151, No. 2, April 2004, pp 143-151.

6) A. Abdi and S. Nader-Esfahani, "Expected Number of Maxima in the Envelope of a Spherically Invariant Random Process," IEEE Trans. Information Theory, vol 49, No. 5 ,May 2003, pp 1369-1375.

7) A. Abdi and S. Nader-Esfahani, "Comments on Statistics of the Scattering Cross-section of a Small Number of Random Scatterers", IEEE Trans. Antennas Propagation, vol 48, No. 5 ,May 2000, pp 844-845

8) A. Abdi, H. Hashemi, and S. Nader-Esfahani, "On the PDF of the Sum of Random Vectors," IEEE Trans. on Communications. Vol. 48, No.1, January 2000, pp 7-12.

9) M.Ghavami, S.Nader-Esfahani and W.Rupprecht, "Gradient-Based Adaptive Algorithm with an Optimum Vector of Convergence Factors". IEEE Transactions on Signal Processing, Vol. 43,, No. 12, Dec. 1995, pp. 3039-3042

10) M.Ghavami; S.Nader-Esfahani and W.Rupprecht, "A Step by Step Modeling Technique using a Generalized Adaptive IIR Delay Filter", IEEE Transactions on Circuits and Systems, Vol. 43, No. 7, July 1996, pp. 487-494.

11) M. Ghavami, S. Nader-Esfahani and W. Rupprech, "Decision Feedback Equalization of HDLS using a generalized Adaptive IIR Delay Filter," European Transactions on Telecommunications, Vol.5, No.3, May-June 1994, pp.37-46.

12) L.F.Lind and S.E.Nader, "On Designing PAM Pulses Optimally Tolerant to Timing Jitter", IEEE Trans. on Communication, COM-26, Jan. 1978, pp. 127-31.

13) L.F.Lind and S.E.Nader, "Realizable Filters That Minimize Intersymbol Interference," The Radio and Electronic Engineer, Vol. 48, No. 12, Dec. 1978, pp. 612-8

14) L.F.Lind and S.E.Nader, "Design Tables for a Class of Data Transmission Filters", Electron. Letters, Vol. 13, No. 19, Sept. 1977, pp. 564-6.

15) S.E. Nader and L.F. Lind, "Optimal Data Transmission Filters", IEEE Transaction on Circuit and Systems, Vol.26, No.1, Jan. 1979, pp.36-45.

16) Moghimi, F.; Nader-Esfahani, S, "Cyclic-Based Estimators for Synchronization of Windowed OFDM Systems," IEEE International Conference on Communications, ICC08, 19-23 May 2008, pp. 573 - 577.

17) A. Ghiamatyoun, M. Nekoui, S. Nader Esfahani, and M. Soltan, "An Iterative Approach for Maximum Concurrent Transmission in Multi-Channel Wireless Mesh Networks, Chinacom, 22-24 Aug. 2007.

18) M. Nekoui, A. Ghiamatyoun, S. Nader Esfahani, M. Soltan, " Iterative Cross Layer Schemes for Throughput Maximization in Multi-Channel Wireless Mesh Networks," IEEE International Workshop on Wireless Mesh and Ad Hoc Networks, 16 Aug., WiMAN 2007, pp. 1088-1092.

19) A. Ghiamatyoun, M. Nekoui, S. Nader-Esfahani, M. Soltan, " Efficient Routing Tree Construction Algorithms for Multi-Channel WiMax Networks," IEEE International Workshop on Wireless Mesh and Ad Hoc Networks, WiMAN 2007, 16 Aug., pp. 957-960.

20) B. Maham, S. Nader-Esfahani. "Performance Analysis of Distributed Space-Time Codes in Amplify-and-Forward Mode," in 8th IEEE Workshop on Signal Processing Advances for Wireless Communications (SPAWC"07), Helsinki, Finland, June 17-20, 2007.

21) M.A. Khajehnejad, A. Heidarzadeh, S. Nader-Esfahani, "A Sufficient Condition for Infinite Connectivity in Two Dimensional Ad-Hoc Wireless Sensor Networks," ISSPA"07, 12-15 Feb. 2007

22) M.R. Gholami and S. Nader-Esfahani, "Improving the Conversionce Rate of Blind Equalization Using Transform Domain," ISSPA"07, 12-15 Feb. 2007

23) B. Mahboobi and S. Nader-Esfahani, "Reduced Complexity Turbo Multi User Detection for a CDMA System Using M-ary PSK," ICCT"06, Nov. 2006, pp. 1-5

24) B. Mahboobi, A. Zamani, S. Nader-Esfahani, "M-PSK Modulation using Mod-M Turbo Codes," MCWC"06, 17-20 September 2006, Amman, Jordan, pp.56-61.

25) M. Afrasiabi and S. Nader-Esfahani, "A New Joint subcarrier, bit and power allocation scheme for multiuser ofdm systems," ICCT"06, 27-30 27-30 Nov. 2006, pp. 1-4

26) B. Maham and S. Nader-Esfahani, "Joint ICI and Noise Reduction in OFDM Using a New Windowing Scheme," Wicom"06, Sep. 2006, pp. 1-4

27) A. R. Alizad, B. Alipanahi, A. Ghasemi, M. Shiva, S. H. Jamali, and S. Nader-Esfahani, "A Blind Channel Estimation Technique for TH-PPM UWB Systems," IEEE International Conference on Communications, Istanbul, Turkey, 11-15 June 2006.

28) B. Mahboobi and S. Nader-Esfahani, "BER of Uplink Distributed Wireless Communication System with Linear Array Topology in Rayleigh Fading Channel," IEEE Sarnoff Symposium, Princeton, New Jersey, 27-28 March 2006

29) A. R. Alizad, B. Alipanahi, A. Ghasemi, M. Shiva, S. H. Jamali, and S. Nader-Esfahani, "A New Approach for UWB Channel Estimation," 5th International Conference on Information, Communications and Signal Processing, 6-9 December 2005, pp. 291-295.

30) M.R Gholami and S. Nader-Esfahani, "Transform Domain MMA," 5th International Conference on Information, Communications and Signal Processing, 6-9 December 2005, pp. 921-925

31) R. Pasandshanjani and S. Nader-Esfahani, "Sensitivity of RAKE Receiver to Ultra Wideband Channel Parameters," International Symposium on Teleommunications, 10-12 Sept. 2005, pp. 909-914.

32) M.R. Gholami and S. Nader-Esfahani, "A New Method of Phase Noise Compensation in OFDM," 2003 IEEE International Conference on Communications, 11-15 May, 2003. pp. 3443-3446.

33) S. Nader-Esfahani and M.R. Gholami, "Lattice Modified Constant Modulus Algorithm for Blind Equalization," 3rd International Symposium on Communication Systems Networks and Digital Signal Processing, 15-17 July 2002, pp. 375-378.

34) A. Olfat and S. Nader-Esfahani, High Resolution Direction of Arrival Estimation," 3rd International Symposium on Communication Systems Networks and Digital Signal Processing, 15-17 July 2002, pp. 328-331.

35) M.R. Gholami, S. Nader-Esfahani, and J. Mohammadpour-Velni, Using Lattice in Windowed Multimodulus Algorithm for Blind Equalization," 1st IEEE International Conference on Communications, Circuits and Systems, 29 June- 1 July 2002, pp. 899-903.

36) M.R. Gholami and S. Nader-Esfahani, Pre-Whitened CMA and MCMA Blind Equalization," 2002 IEEE International Conference on Telecommunications, 23-26 June 2002, Vol. 1, pp. 335-339.

37) A. Olfat and S. Nader-Esfahani, Direction of Arrival Estimation of Multipath Signals In DS-CDMA Systems," 2002 IEEE International Conference on Telecommunications, 23-26 June 2002, Vol. 2, pp. 121-124.

38) S. Nader-Esfahani, A. Javaherian and R. Shaghaghi-Kandovan, A New Method of Seismic Wavelet Estimation," 21st IASTED International Conference on Modelling, Identification and Control, 18-21 February 2002, pp. 147-150.

39) S. Nader-Esfahani and R. Shaghaghi-Kandovan, Blind Identification of MA Systems Using a Combined Method," 3rd WSEAS Symposium on Mathematical Methods and Computational Techniques in Electrical Engineering, 29-31 December 2001, pp.49-52.

40) H. Zaredoost, M.T. Kilani and S. Nader-Esfahani, Multifrequency Estimation Using a Novel Resonator-based Adaptive Line Enhancer," 1998 IEEE International Conference on Telecommunications, 22-25 June 1998, pp 203-206.

41) S. Nader-Esfahani and A. Abdi, "New Results on the Expected Number of Maxima in the Normal Process Envelope", 1997 IEEE International Symposium on Information Theory, June 20 - July 4, 1997, P 79.

42) A. Abdi and S. Nader-Esfahani, "An Optimum Laguerre Expansion for the Envelope PDF of Two Sine Waves in Gaussian Noise," Proc. of IEEE Southeastcon 96 Conference. , Tampa, Florida, U.S.A., April 11-14, 1996, pp. 160-163.

43) A. Abdi, S. Nader-Esfahani, "A General Probability Density Function For the Signal Envelope in Multipath Fading Channels Using Laguerre Polynomials", Proc. of IEEE VTC96. Atlanta, U.S.A., April 28 - May 1, 1996. pp. 1428-1432.

44) A. Abdi, S. Nader-Esfahani, "A Simple Formula for the Rate of Maxima in the Envelope of Normal Processes Having Unsymetrical Spectra", Proc. 1995 IEEE International Symposium on Information Theory, 17-22 September, 1995 , p. 425.

45) M.Ghavami, S.Nader-Esfahani, "Study of a New AIIRDF in the Decision Feedback Equalization of HDSL", Proc. International Conference on Signal Processing, Beijing, China, Oct. 1993, pp. 523- 526.

46) L.F.Lind, S.E.Nader, "Data Transmission Filters With Forced Zeros". Proc. 1989 IEEE International Symposium on Circuits and Systems, pp. 1079-82.

47) L.F.Lind and S.E.Nader, "Jitter-Tolerant Pulse Shapes", IEE Colloquium on Jitter in Digital Communication Systems, Digest 1977/45, Oct. 1977, pp. 9/1-9/4.

48) L.F.Lind and S.E.Nader, "Optimal Design of a Data Transmission channel Containing Jitter Noise", Proc. IERE Conference on Digital Processing of Signals in Communications (Loughborough, England), Sept. 1977, pp. 313-9.

49) L.F.Lind and S.E.Nader, "Data Transmission Filters Having an Equiripple Stopband", Proc. European Conference on Circuit Theory and Design (Lausanne, Switzerland), Sept. 1978, pp. 607-11.

50) L.F.Lind and S.E.Nader, "Realizable Matched Filters for Minimal Intersymbol Interference", Proc. IEEE International Symposium on Circuits and Systems (New York, NY), May 1978, pp. 441-5.

51) L.F.Lind and S.E.Nader, "Optimal Analog Filter for Data Transmission", Proc. IEEE International Symposium on Circuits and Systems (Arizona, NM), April 1977, pp. 344-337.

52) B. Maham and S. Nader-Esfahani, "PEP Analysis in cooperative systems using distributed differential space-time codes," in 15th Iranian Conference on Electrical Engineering (ICEE 2007), Tehran, Iran, May 2007, pp. 300-304 (in Persian).

53) M. Afrasiabi and S. Nader-Esfahani, "A New Method of Bit and Power Distribution in OFDM Systems," Proc. 14th Iranian Conference on Electrical Engineering, May 16-18, 2006, Amir Kabir University of Technology, Tehran, Iran. Vol. 2, pp. 1-6 (in Persian).

54) M.R. Gholami and S. Nader-Esfahani, "Improvement in the Convergence Rate of MMA family Algorithms," Proc. 12th Iranian Conference on Electrical Engineering, May 11-13, 2004, Ferdowsi University of Mashhad, Mashhad, Iran. pp. 501-506 (in Persian).

55) F. Edrisi, L.Ehsan, E. Kabir, S. Nader-Esfahani, "The Block and Gold Length effect in Spread Spectrum Digital Image Watermarking in DCT Domain," Proc. 11th Iranian Conference on Electrical Engineering, May 6-8, 2003, University of Shiraz, Shiraz, Iran. Vol. 2, pp. 368-376 (in Persian).

56) L. Ehsan, F. Edrisi, E. Kabir and S. Nader-Esfahani "Spread Spectrum Digital Image Watermarking in DCT Domain," Proc. 8th annual International CSI Computer Conference, Feb. 25-27, 2003, Ferdowsi University of Mashhad, Mashhad, Iran. pp. 494-501 (in Persian).

57) M.R. Gholami and S. Nader-Esfahani, "Improvement of the Rate of Convergence in Blind Equalization Using Lattice," Proc. 10th Iranian Conference on Electrical Engineering, May 14-16, 2002, University of Tabriz, Tabriz, Iran. Vol. 2, pp. 314-321 (in Persian).

58) M.R. Gholami and S. Nader-Esfahani, "Windowing Method in Blind Equalization," Proc. 10th Iranian Conference on Electrical Engineering, May 14-16, 2002, University of Tabriz, Tabriz, Iran. Vol. 2, pp. 290-297 (in Persian).

59) M.R. Gholami and S. Nader-Esfahani, Windowing Method in Blind Equalization, Proc. 10th Iranian Conference on Electrical Engineering, May 14-16, 2002, University of Tabriz, Tabriz, Iran. Vol. 2, pp. 290-297 (in Persian).

60) H. Zaredoost, M.T. Kilani and S. Nader-Esfahani, Estimation of the Frequency Components, in Harmonic and Pseudo-harmonic Signals, Using Adaptive IIR Filter Bank, Proc. 6th Iranian Conference on Electrical Engineering, May 12-14, 1998, Khajeh-Nasiredin Toosi University of Technology, Tehran, Iran.. Proceeding of Communication, pp. 4.262-4.270 (in Persian).

61) S. Nader-Esfahani and J. Rohani, A new Method for the Direction of Arrival Estimation, Using HOS, Proc. 6th Iranian Conference on Electrical Engineering, May 12-14, 1998, Khajeh-Nasiredin Toosi University of Technology, Tehran, Iran. Proceeding of Communication, pp. 4.61-4.66 (in Persian).

62) S. Nader-Esfahani, E. Ettelaie, "Removal of Bias in Cyclic MUSIC Estimation of DOA," Proc. 4th Iranian Conference on Electrical Engineering, May 13-16, 1996, University of Tehran, Tehran, Iran. Proceeding of Communication, pp. 395-407 (in Persian).

63) S. Nader-Esfahani, M. Ghavami, "Echo Cancellation Using a Step-By-Step modeling Technique." Proc. 3rd Iranian Conference on Electrical Engineering, May 15-18, 1995, Iran University of Science & Technology. Proceeding of Communication, Vol. 2, pp. 61 - 68.

64) S. Nader-Esfahani, A. Abdi, "A New Formula for the Mean Number of the Peaks of a Normal Process Envelope". Proc. 2nd Iranian Conference on Electrical Engineering, May 17-20, 1994, Tarbiat Modarres University, Tehran, Iran.. Proceeding of Communication, Vol. 5, pp. 450-456 (in Persian).