Radiotekhnika
Publishing house Radiotekhnika

"Publishing house Radiotekhnika":
scientific and technical literature.
Books and journals of publishing houses: IPRZHR, RS-PRESS, SCIENCE-PRESS


Тел.: +7 (495) 625-9241

 

Signal detection with MIMO radars

Keywords:

V.S. Chernyak – Dr. Sc. (Eng.), Professor, Moscow Aviation Institute and Bauman Moscow State Technical University (National Research Universities). E–mail: chernyak@mail.ru


One of the important advantages of MIMO radars with colocated antennas is the capability to exclude scanning of a surveillance sector in search mode thanks to broad transmitting beams. This is a result of orthogonal (or close to orthogonal) waveforms radiated by all elements of a transmitting antenna array. In tracking mode all these elements can radiate the same waveform forming narrow transmitting beams and concentrating radiated energy on detected targets as in a conventional phased antenna array. In recent years many publications have been appeared (mostly in foreign literature) where advantages and disadvantages of MIMO radars with colocated antennas as well as their structures and possible applications are considered. However, energy characteristics of such radars have been investigated insufficiently. It is known that radiation of orthogonal (or close to orthogonal) signals by different elements of a transmitting antenna array leads to energy loss caused by signal noncoherent summation on a target (and accordingly broad beamwidths of the array). On the other hand, in many works the possibility of loss compensation is assumed by forming narrow transmitting beams on receive. To the author knowledge, there is no sufficiently rigorous and systematic consideration of MIMO radar detection problem in available literature including possibility of either coherent or noncoherent signal transmission. Statistical synthesis of optimal detection algorithms (according to Neyman-Pearson criterion) has been carried out in the paper for MIMO radars with coherent and noncoherent mutually orthogonal transmitting signals in a background of white Gaussian noise. As a result, block diagrams for optimum detectors in search mode are obtained where target location is apriori unknown. Several structures are given with different order of linear transformations. Analysis of the synthesized algorithms and their comparison with the optimum detection algorithm for a radar with a conventional phased antenna array has revealed the specific values of energy loss for both coherent and noncoherent transmitting signals. Specifically, it has been shown to what degree narrow transmitting beams on receive can compensate for energy loss caused by the orthogonality of transmitting waveforms.
References:

  1. Rabideau D.J., Parker P.A. Ubiquitous MIMO Multifunction Digital Array Radar… and the Role of Time-Energy Management in Radar. Project Report DAR-4. Lincoln Laboratory Massachusetts Institute of Technology. 2004. URL http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA421233.
  2. Bliss D.W., Forsythe K.W. Multiple-input multiple-output (MIMO) radar and imaging: Degrees of freedom and resolution // Record 37th Asilomar Conf. on Signals. Systems and Computers. Pacific Groove. CA. USA. 2003. Nov. V. 1. P. 54–59.
  3. Robey F.C., Coutts S., Weikle D., McHarg J.C., and Cuomo K.MIMO Radar Theory and Experimental Results // Record 38th Asilomar Conf. on Signals, Systems and Computers, Pacific Groove. CA. USA. 2004. Nov. V. 1. P. 54–59.
  4. Fuhrmann D.R., San Antonio G. Transmit beamforming for MIMO radar systems using partial signal correlations // Record 38th Asilomar Conference on Signals, Systems and Computers. Pacific Grouve. CA. USA. 2004. V. 1. P. 295–299.
  5. Forsythe K.W., Bliss D.W. Waveform correlation and optimization issues for MIMO radar // Record 39th Asilomar Conference on Signals, Systems and Computers. Pacific Grouve. CA. USA. 2005. P. 1306–1310.
  6. Donnet B.J., Longstaff I.D. MIMO Radar, Techniques and Opportunities // Proc. 3rd European Radar Conf. EuRAD 2006. UK. P. 112–115.
  7. Duofang Ch., Baixiao Ch., Shouhong Zh. Multiple-input multiple-output radar and sparse-array synthetic impulse and aperture radar // Proc. CIE Int. Conf. on Radar. Shanghai. China. 2006.
  8. Li Jian. and Stoica Petre, Editors. MIMO Radar Signal Processing. New York: Wiley. 2009.
  9. Friedlander B. On Transmit Beamforming for MIMO Radar // IEEE Trans. on Aerospace and Electronic Systems. V. 48, № 4. 2012. Oct. P. 3376–3388.
  10. Vovshin B.M. Sverhshirokopolosnaja videoimpul'snaja sistema s sintezirovannoj aperturoj dlja parallel'nogo obzora prostranstva // Radiotehnika i jelektronika. 1999. T. 44. № 12. P. 1479–1486.
  11. Chapurskij V.V. Funkcija neopredelennosti i prostranstvennaja razreshajushhaja sposobnost' sverhshirokopolosnyh videoimpul'snyh antennyh reshetok // Vestnik MGTU im. N.Je. Baumana. Serija Priborostroenie. 2005. V. 4. P. 94–108.
  12. Li Jian, Stoica Petre. MIMO Radars with Colocated Antennas // IEEE Signal Processing Magazine. 2007. September. P. 106–114.
  13. Li J., Stoica P., Xie Y. On probing signal design for MIMO radar // IEEE Trans. on Signal Processing. V. 55. № 8. P. 4151–4161.
  14. Frazer G.J., Abramovich Y.I., Johnson B.A., and Robey F.C. Recent Results in MIMO Over-the-Horizon Radar // Proc. 2008 IEEE Radar Conf. Rome. Italy. P. 789–794.
  15. Abramovich Y.I., Frazer G. J. Bounds on the Volume and Height Distributions for the MIMO Radar Ambiguity Function // IEEE Signal Processing Letters. 2008. V. 15. P. 505–508.
  16. Daum, F., Huang, J. MIMO Radar: Snake Oil or Good Idea // IEEE AES Magazine. 2009. May. P. 8–12.
  17. Brookner E. MIMO radar: demystified // Microwave J., Frequency Matters. 2013. V. 56. № 1. URL: http://www.microwavejournal.com/articles/print/18894-mimo-radar-demystified.
  18. Rabideau D.J. MIMO radar waveform and cancellation ratio // IEEE Trans. on Aerospace and Electronic Systems. V. 48. № 2. 2012. April. P. 1167–1178.
  19. Chernyak V.S. O novyh i staryh idejah v radiolokacii: MIMO RLS // Uspehi sovremennoj radiojelektroniki. 2011. № 2. P. 5–20.
  20. Chernyak V.S. Mnogopozicionnaja radiolokacija. M: Radio i svjaz'. 1993 (English edition: Chernyak V.S.Fundamentals of Multisite Radar Systems. Multistatic Radars and Multiradar Systems. Gordon and Breach Science Publishers. 1998).
  21. Shirman Ja.D., red. Teoreticheskie osnovy radiolokacii. M.: Sov. Radio. 1970.
  22. Tihonov V.I. Statisticheskaja radiotehnika. Izd. 2-e. M: Radio i svjaz'. 1982.
  23. Swerling P. Detection of Fluctuating Pulsed Signals in the Presence of Noise, IRE Transactions on Information Theory. IT-3. 1957. Sept. P. 175−178.
  24. Chernyak V.S. Mnogopozicionnye radiolokacionnye sistemy na osnove MIMO RLS // Uspehi sovremennoj radiojelektroniki. 2012. № 8. P. 29–46.

© Издательство «РАДИОТЕХНИКА», 2004-2017            Тел.: (495) 625-9241                   Designed by [SWAP]Studio