Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2022. №11
ContentsFull text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2022.11.2
SIMULATION OF BROADBAND NOISE INTERFERENCE
IN ADAPTIVE SPATIAL FILTERING SYSTEMS OF RADIO SIGNALS
M.Y. Lishak
National Research University «Moscow Power Engineering Institute»
111250, Russia, Moscow, Krasnokazarmennaya str., 14
The paper was received on September 10, 2022.
Abstract. To investigate the characteristics of adaptive spatial filtering systems of radio signals, the simulation of signals and interferences is widely used. In such a simulation, it is usually assumed that the propagation time of the interference wave along the antenna system is much less than the interference correlation time. In this case, the interference is narrowband in the space-time sense. If this condition is not met, then to correctly determine the characteristics of the system, it is necessary to simulate an interference that is broadband in the space-time sense. Such a model should take into account the differences in the complex envelopes of the interference in the antenna-receiving channels, due to the delay caused by the difference in the propagation time of the wave. The paper describes an algorithm for simulation broadband noise interference, based on the using spectrum of the complex envelope of the interference with different delays in the antenna-receiving channels. The listing of the MATLAB function implementing the proposed algorithm is given. To test the model, the autocorrelation and cross-correlation functions of the interference were obtained. The interference spectrum at the output of the adaptive spatial filter, the radiation pattern, and the amplitude-frequency response were obtained as well. The test results confirm the correctness of the developed model.
Key words: adaptive spatial filtering, computer simulation, narrowband interference, discrete Fourier transform, antenna array.
Corresponding author: Lishak Mikhail Yur'evich, LishakMY@rambler.ru
References
1. Ratynskii M.V. Adaptatsiya i sverkhrazreshenie v antennykh reshetkakh [Adaptation and super-resolution in antenna arrays]. Moscow, Radio i Svyaz' Publ. 2003. 200 p. (In Russian)
2. Foutz J., Spanias A., Banavar M.K. Narrowband direction of arrival estimation for antenna arrays. Springer. 2008. Synthesis lectures on antennas. Lecture #8. https://doi.org/10.2200/S00118ED1V01Y200805ANT008
3. Godara L., Jahromi S. Limitations and capabilities of frequency domain broadband constrained beamforming schemes. IEEE Transactions on Signal Processing. 1999. V.47. №9. P.2186-2195.
4. Li H., Zhang X., He Z., Yu J. A wideband digital beamforming method based on stretch processing. WSEAS Transactions on Signal Processing. 2009. V.5. №7. P.251-260.
5. Chern Sh.J., Sung Ch.Y. The hybrid Frost’s beamforming algorithm for multiple jammers suppression. Signal Processing. 1995. V.43. P.113-132.
6. Agrawal M., Prasad S. DOA estimation of wideband sources using a harmonic source model and uniform linear array. IEEE Transactions on Signal Processing. 1999. V.47. №3. P.619-629.
7. Amirsoleimani S., Olfat A. Wideband modal orthogonality: A new approach for broadband DOA estimation. Arxiv. https://doi.org/10.48550/arXiv.2006.07261
8. Marsaglia G., Tsang W.W. The ziggurat method for generating random variables. Journal of Statistical Software. 2000. V.5. №8. P.1-7. https://doi.org/10.18637/jss.v005.i08
9. Moler C. Numerical Computing with MATLAB. SIAM. 2004. Chapter 9 Random Numbers [web]. Mathworks. Date of access: 01.08.2022. URL: https://www.mathworks.com/moler.html
10. Amitay N., Galindo V., Wu C.P. Theory and Analysis of Phased Array Antennas. J. Wiley & Sons. 1972. 443 p.
11. Sergienko A.B. Cifrovaya obrabotka signalov [Digital signal processing]. 3-rd Ed. Saint Petersburg, BHV-Peterburg Publ. 2011. 768 p. (In Russian)
12. Baskakov S.I. Radiotekhnicheskie cepi i signaly [Radio-frequency circuits and signals]. 3-rd Ed., revised. Moscow, Vysshaya shkola Publ. 2000. 462 p. (In Russian)
For citation:
Lishak M.Y. Simulation of broadband noise interference in adaptive spatial filtering systems of radio signals. Zhurnal radioelektroniki [Journal of Radio Electronics] [online]. 2022. №11. https://doi.org/10.30898/1684-1719.2022.11.2 (In Russian)