| Autor: |
Lawal Bello, Ashraf M. A. Ahmad, M. Ajiya, Zainab Yunusa Yusuf |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
2019 2nd International Conference of the IEEE Nigeria Computer Chapter (NigeriaComputConf). |
| DOI: |
10.1109/nigeriacomputconf45974.2019.8949625 |
| Popis: |
Key feature of the electronic intelligence (ELINT) setup as part of the electronic warfare is the interception and analysis of radar signals. This paper as part of ELINT provides a time parameter estimation algorithm associated with poly-phase pulsed radar signal of low probability of intercept (LPI) in a non-cooperative environment in order to identify its other characteristics. Three different methods based on power obtained at instants of time are used. The first two are obtained from the time-aspect approximation of a time-frequency distribution (TFD) while the third one is the traditional method of using its conjugate form. The main TFD used in this paper is Wigner-Ville distribution (WVD) of separable kernel and its brief heuristic approach was presented. Thereafter, an algorithm based on measuring the time-spectrum width is developed so as to determine two basic time parameter of the radar signal; either the pulse width (PW) or the pulse repetition period (PRP). The quality of the algorithm developed is tested at various signal-to-noise ratios (SNRs) in the presence of noise modeled by pseudorandom numbers of Gaussian nature. The Result obtained shows that for a fixed threshold of 37.5%, power at instants of time obtained from the TFD performs best at minimum SNR of −15 dB. The traditional method of getting power at instants of time performs very well if a variable threshold is applied at minimum SNR of −11 dB. The results shows that the proposed methods may be deployed in the practical ELINT field for analysis of radar signal |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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