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Digital Beamforming and Adaptive Processing

  • Roger A. Dana
Chapter

Abstract

Modern ESAs present the opportunity to do digital processing on the outputs of multiple subarrays without having to digitally sample the output of each element, thereby greatly simplifying the design of the ESA while still achieving the benefits of adaptive processing. The principles behind two common techniques, minimum variance distortionless response (MVDR) and space-time adaptive processing (STAP), are described, and it is shown that under idealized conditions MVDR and STAP perform identically. An example of jammer nulling is discussed in detail when the interfering signal(s) is within the main beam of the ESA but outside of the full width at half maximum (FWHM) beamwidth. It is shown also that MVDR works better in this case when the jammers are distributed symmetrically about the desired signal, something that can be achieved in MVDR by simply modifying the subarray to subarray covariance matrix of the interference used to compute subarray weights.

Keywords

Electronically scanned array (ESA) Digital beamforming Adaptive processing Carrier-to-noise power spectral density Minimum variance distortionless response (MVDR) Space-time adaptive processing (STAP) MVDR and STAP equivalence 

References

  1. Dana, R. A. (2018, September) Digital beamforming vs adaptive processing in modern electronically scanned arrays (ESAs). In: Proceedings of Antenna Applications Symposium Google Scholar
  2. Mailloux, R. J. (2005). Phased Array antenna handbook (2nd ed.). Boston: Artech House.Google Scholar
  3. Petersen, K. B., & Pedersen, M. S. (2008, November). The matrix cookbook (matrixcookbook.com).
  4. Richards, M. A. (2014). Fundamentals of radar signal processing. New York: McGraw-Hill Book Company.Google Scholar
  5. Van Trees, H. L. (2002). Optimum array processing. New York: Wiley Interscience.CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Roger A. Dana
    • 1
  1. 1.Advanced Technology Center of Rockwell CollinsCedar RapidsUSA

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