Improving Costas Radar Signal by Applying Variable Time Spacing Using Costas Array And Golomb Ruler
published by Damascus University
in 2010
in Communication Engineering
and research's language is
العربية
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Abstract in English
The normal Costas frequencies code sequence signal is very well known and important signal in pulse compression Radar. In this paper we present two algorithms to modify Costas sequence by arranging the frequencies of Costas signal in time, first using
binary Costas array and second using Golomb Ruler. These methods enable us to control side-lobes and to improve Doppler frequency resolution of Ambiguity Function (AF).
At first we present the principle of these methods Golomb Ruler and Costas array.
Then we apply these two methods to normal Costas signal, modified Costas signal and step frequency modulation and calculate the AF for all.
The results of comparison have shown that considerable reduction of side-lobes of AF is achieved by using these two methods, and consequently an improvement of AF is obtained.
References used
Rihaczek, A. W., Principles of High Resolution Radar , McGraw-Hill, New York, 1969
Costas, J. P., A study of a class of detection waveforms having nearly ideal range-Doppler ambiguity properties , Proceedings of the IEEE, vol. 72, no. 8, August 1984, pp. 996-1009
Levanon, N., Mozeson, Stepped frequency pulse train radar signal IEE Proc. Sonar Navig., 2002, 149, (6) pp. 297-309
Golomb, S. W., and H. Taylor, Constructions and properties of Costas arrays , Proceedings of the IEEE, vol. 72, no. 9, September 1984, pp. 1143- 1163
Levanon, N., Mozeson, Nullifying ACF grating lobe stepped-frequency train of LFM pulses . IEEE Transaction on Aerospece and Electronics Systems, Vol. 39, (2) (Apr.2003), pp. 694-703