A Polarization Anti-jamming Algorithm Based on Space-Frequency Constraints
Polarization sensitive array (PSA) is an array system composed of polarization sensitive elements which consist of electromagnetic vector sensor. Compared with the conventional array, the PSA not only can obtain the spatial information of the signal, but
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Abstract Polarization sensitive array (PSA) is an array system composed of polarization sensitive elements which consist of electromagnetic vector sensor. Compared with the conventional array, the PSA not only can obtain the spatial information of the signal, but also can perceive the polarization state information of the signal. As a result the anti-jamming processing in the polarization domain can increase the anti-jamming degree of freedom, as well as improve the anti-jamming performance. Based on the PSA, this paper extends the existing spatial and polarization domain filtering model to the spatial, spectral and polarization domain for wideband signal processing. A polarization anti-jamming algorithm based on space-frequency constraint is proposed. The algorithm transforms the received signal into the frequency domain, constraining the polarization domain and spatial domain on every frequency bin of interest with polarization-spatial domain steering vector by the linearly constrained minimum variance (LCMV) criterion. While suppressing the interferences, the processing loss of the desired signal can be reduced, enhancing the anti-jamming ability. The simulation results show that the proposed algorithm can effectively suppress the interference and fully validates the effectiveness of the proposed algorithm. The algorithm can be widely used in satellite navigation anti-jamming receiver, significantly improving the availability and sensitivity of the receiver in a complex environment. Keywords PSA
Anti-jamming Space-frequency Constraint LCMV
Y. Zheng (&) C. Ren G. Hu Unicore Communications, Inc., Fengxiandonglu Road, Haidian District, Beijing 100081, China e-mail: [email protected] © Springer Nature Singapore Pte Ltd. 2017 J. Sun et al. (eds.), China Satellite Navigation Conference (CSNC) 2017 Proceedings: Volume I, Lecture Notes in Electrical Engineering 437, DOI 10.1007/978-981-10-4588-2_72
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1 Introduction As we know, in the satellite navigation system, the landing signals are extremely weak after making a long journey from satellites, which are vulnerable to interferences, so anti-jamming technology has always been an important issue in the field of satellite navigation. Many classical algorithms have been developed to eliminate interferences, processing the signals in time domain, frequency domain and space domain [1]. Algorithm in polarization domain which is based on the PSA is another effective approach [2]. Comparing with the ordinary antenna array, the PSA obtains not only the spatial information of the signal, but also the polarization information. Thus, anti-jamming algorithms carried out in the polarization domain increase the degree of freedom and anti-jamming performance. Over the past decades, researchers have conducted an in-depth study and made a lot of achievements in the field of PSA [3, 4]. Applications of the PSA in anti-jamming processing has been analysed in detail in [5, 6], where desired signals and interferences cannot be separated in space
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