Parameter Evaluation of Filters for Formation the Plane Wave Front in Radiolocation Stations with Synthesized Aperture
DOI:
https://doi.org/10.20535/RADAP.2019.77.60-65Keywords:
radiolocation, synthesized aperture, ultra-high resolution, formation of a plane wave front, filter parameters, range, track band, bandwidth, non-bandwidth bandAbstract
The task of achieving the resolution in the bandwidth radar with the increased range synthesis aperture for the purpose of recognizing the targets is relevant at the present time, despite significant achievements in this topic. From the point of view of the recognition of objects to a certain type or class of distinction 0.2-0.3 meters is sufficient to solve this problem. However, the problem of obtaining ultra-distinction in a bandwidth radar station with the increased range synthesis aperture requires solving a number of issues, in particular the evaluation of filter parameters for the formation of a flat wave front in a radars with synthetic aperture. One of the solutions of this problem is the inclusion of additional algorithms for the reflected signal processing, which artificially forms a quasi-flat front of the sounding signal wave. In the current article, the question of the selection and evaluation of filter parameters for the formation of a flat wave front in a radar station with ultra-high resolution is being solved. In order to achieve this goal, the article proposes: - a step-by-step procedure for digital filters calculating; - estimation of the number of samples of digital filters with impulse characteristics of finite length in the channels and the observation band; - estimation of the number of samples of impulse characteristics of filters. For the formation of a quasi-flat wave front in a radar station with the increased range synthesis aperture it is necessary to use digital filters with impulse characteristics of finite length and linear phase characteristics in processing algorithms. From the point of view of obtaining minimal losses in the resolution of radar stations with a synthesized aperture along the traveling distance in the process of artificial formation of the flat front of the sounding signal wave, it is expedient to use Chebyshev approximation of the amplitude-frequency characteristic of optimal filters with a minimax error. The width of the transition band of such filters is much smaller than that of other optimal filters with the same values of the countdowns.
References
Fedotov B.M., Stankevych S.A. and Ponomarenko S.O. (2010) Sposib syntezuvannia apertury RLS bichnoho ohliadu i prystrii dlia ioho zdiisnennia [A method of synthesizing an aperture of a side-vision radar and a device for implementing it], Patent UA92116
Rabiner L. and Gold B. (1975) Theory and Applicationj of Digital Signal Processing}, Rentice-Hall Inc., 777 p.
Sliusarchuk O. O. (2018) The Method for Time Calculation of Information Taking in the Aperture Synthesis Radar Station, Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, Iss. 75, pp. 33-39. DOI: 10.20535/RADAP.2018.75.33-39.
Fedotov B. N. (2010) Otsinka vplyvu netochnostei kompensatsii sferychnosti frontu khvyli v radiolokatsiinykh stantsiiakh nadvysokoho rozriznennia [Estimation of the influence of inaccuracies in compensation of the sphericality of the wave front in ultralight detection radar stations], Zbirnyk naukovykh prats DNDIA, Iss. 13, pp. 114-122.
Antipov V. N., Goryainov V. T., Kulin A. N. (1968) Radiolokatsionnye stantsii s tsifrovym sintezirovaniem apertury antenny [Radar with digital synthesizing antenna aperture], Moskow, Radio i svyaz', 304 p.
Fedotov B.M., Sliusarchuk O.O. (2012) Sposib tsyfrovoi obrobky traiektornykh syhnaliv lokatora z pokadrovym syntezom apertury [Method for digital processing of trajectory signals of a locator with frame-by-frame synthesis of aperture], Patent UA73752
Daffalla M.M. (2013) Adaptive multifunction filter for radar signal processing. 2013 International conference on computing, electrical and electronic engineering (ICCEEE). DOI: 10.1109/icceee.2013.6633904
Mya Mya Aye and Thiri ThandarAung (2016) Digital Filters for Radar Signal Processing / Mya Mya Aye, Thiri Thandar Aung, International Research Journal of Engineering and Technology (IRJET), Vol. 03, Is. 11, pp. 724-729.
Thottempudi P. and N A.R. (2014) Design of Matched Filter for Radar Applications. Electrical and Electronics Engineering: An International Journal, Vol. 3, Iss. 4, pp. 1-10. DOI: 10.14810/elelij.2014.3401
Rautand V. G. and Lokhande A. (2015) Design of Carry Select Adder for FIR Filter. International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, Vol. 04, Iss. 03, pp. 1348-1351. DOI: 10.15662/ijareeie.2015.0403026
Costa M.M.S., Bogossian O.L. and Passaro A. (2015) Basic Requirements for Synthetic Aperture Radar, 6th Workshop on Space Engineering and Technology, 2 p.
Mao X., He X., Ding L., Li D. and Yan H. (2017) Ultra-high resolution (0.05m) SAR image formation processing. 2017 International Symposium on Antennas and Propagation (ISAP). DOI: 10.1109/isanp.2017.8228773
Downloads
Published
Issue
Section
License
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
