6. Resultados y Discusión.
6.2 Caracterización regional de la AUP.
6.2.4. Trabajo en el Predio y Toma de decisiones
In my future work, I want to work on a special breed of frequency coded pulses known as Costas Pulses that I have already mentioned briefly in the article 1.4.3 of chapter one. Costas coded pulses follow a frequency hopping sequence, that result in sidelobe levels which is 1/N of the mainlobe peak for any delay and Doppler shift. Hence greater reduction in sidelobes can be obtained by increasing the order of the Costas code. But the generation of Costas codes after N=30 is hard to get, and based on rigorous computer search as they are very unevenly distributed. Hence my work will be to design the pulses using Costas Hoping sequences and finding Costas sequences of higher orders by developing and implementing efficient search algorithms specific for the purpose.
49 | P a g e
Bibliography
[1] N. Levanon and E. Mozeson, Radar Signals, Hoboken, New Jersey: John Wiley and sons, 2004. [2] J. Costas, "A study of a class of detection waveforms having nearly ideal range-Doppler ambiguity
properties," IEEE, vol. 72, no. 8, pp. 996-1009, Aug. 1984.
[3] S. Golomb and H. Taylor, "Constructions and properties of Costas arrays," Proceedings of the IEEE , vol. 72, no. 9, pp. 1143-1163, 1984.
[4] S. Rickard, E. Connell, F. Duignam, B. Ladendorf and A. Wade, "The enumeration of Costas arrays of size 26," in IEEE Conference on Information Sciences and Systems, Princeton, NJ, United states, 2006.
[5] J. K. Beard, "Generating costas arrays to order 200," in IEEE Conference on Information Sciences and
Systems, Princeton, NJ, United states, 2007.
[6] N. Levanon and E. Mozeson, "Orthogonal train of modified Costas pulses," in Proceedings of the
2004 IEEE Radar Conference, Philadelphia, PA, USA, 2004.
[7] N. Levanon and E. Mozeson, "Modified Costas signal," IEEE Transactions on Aerospace and
Electronic Systems, vol. 40, no. 3, pp. 946-953, July 2004.
[8] M. Luszczyk and D. Mucha, "Kaiser-bessel window weighting function for polyphase pulse compression code," in 17th International Conference on Microwaves, Radar and Wireless
Communications, Wroclaw, Poland, 2008.
[9] A. Milewski, E. Sedek and S. Gawor, "Amplitude weighting of linear frequency modulated chirp signals," in IEEE 15th Signal Processing and Communications Applications, Eskisehir, Turkey, 2007. [10] A. Nuttall, "Some windows with very good sidelobe behavior," IEEE Transactions on Acoustics,
Speech and Signal Processing, Vols. ASSP-29, no. 1, pp. 84-91, Feb. 1981.
[11] Y. Tan and Z. Xiao, "Clonal particle swarm optimization and its applications," in IEEE Congress on
Evolutionary Computation, Singapore, 2007.
[12] R. Storn and K. Price, "Differential Evolution – A Simple and Efficient Heuristic for Global Optimization over Continuous Spaces," Journal of Global Optimization, vol. 11, no. 4, pp. 341 - 359, December 1997 .
[13] J. Kennedy and R. Eberhart, "Particle swarm optimization," in IEEE International Conference on
50 | P a g e
[14] Y. Tan, "Particle Swarm Optimization Algorithms Inspired by Immunity-Clonal Mechanism and Their Applications to Spam Detection," International Journal of Swarm Intelligence Research, vol. 1, no. 1, pp. 64-86, March 2010.
[15] S. Das and P. N. Suganthan, "Differential evolution: A survey of the state-of-the-art," IEEE
Transactions on Evolutionary Computation, vol. 15, no. 1, pp. 4-31, February 2011.
[16] N. Levanon and E. Mozeson, "Nullifying ACF grating lobes in stepped-frequency train of LFM pulses," IEEE Transactions on Aerospace and Electronic Systems, vol. 39, no. 2, pp. 694-703, April 2003.
[17] Y. Bao, C. Zhou, P. He and E. Mao, "Recurrent lobes reduction of stepped-frequency LFM pulse train using ambiguity function," in 12th International Conference on Information Fusion, Seattle, WA, USA, 2009.
[18] I. Gladkova and D. Chebanov, "Grating lobes suppression in stepped-frequency pulse train," IEEE
Transactions on Aerospace and Electronic Systems, vol. 44, no. 4, pp. 1265-1275, Oct. 2008.
[19] K. Drakakis, F. Iorio and S. Rickard, "The enumeration of Costas arrays of order 28," in IEEE
Information Theory Workshop, Dublin, Ireland, 2010.
[20] D. Rabideau, "Nonlinear synthetic wideband waveforms," in Proceedings of the 2002 IEEE Radar
Conference, Long Beach, CA, USA, 2002.
[21] I. Gladkova, "A general class of stepped frequency trains," in IEEE National Radar Conference -
Proceedings, Verona, NY, United states, 2006.
[22] B. R. Mahafza, Radar Systems, Boca Raton London New York Washington, D.C.: Chapman & Hall CRC, 2000.
[23] X. Dai, J. Xu and Y.-N. Peng, "Suppressing HRRP grating lobes in stepped-frequency train of LFM pulses using extended correlation," Electronics Letters, vol. 43, no. 25, pp. 1462-1464, Dec. 2007. [24] I. Gladkova, "Analysis of stepped-frequency pulse train design," IEEE Transactions on Aerospace and
Electronic Systems, vol. 45, no. 4, pp. 1251-1261, Oct. 2009.
[25] K. Rajeswari, N. Gangatharan, E. MorrisG and G. Rao, "Sidelobe reduction techniques for range- resolution radar," in The 8th International Conference on Communication Systems, Nov. 2002. [26] A. Sahoo and G. Panda, "A multiobjective optimization approach to determine the parameters of
stepped frequency pulse train," Aerospace Science and Technology, vol. 24, no. 1, pp. 101-110, 2013.
51 | P a g e
[27] I. Gladkova and D. Chebanov, "Suppression of grating lobes in stepped-frequency train," in IEEE
International Radar Conference Record , Arlington, VA, USA, 2005.
[28] W. He1, T. Z. Sheng1, G. S. Yu, W. J. Xun, Y. B. Ming, W. Yi and C. Tao, "Hanning self-convolution window and its application to harmonic analysis," Science in China Series E: Technological Sciences, vol. 52, no. 2, pp. 467-476, Feb. 2009.
[29] K. Okarma, "Polynomial windows with low sidelobes' level," Elsevier for EURASIP, vol. 87, no. 4, pp. 782-788, April 2007.
[30] K. Avci and A. Nacaroglu, "Cosh window family and its application to FIR filter design," AEU-