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Adaptive Digital Beamforming

Adaptive Digital Beamforming

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Principles of Modern Radar: Advanced techniques — Recommend this title to your library

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DBF architectures provide significant functionality enhancements for phased array radar. At the current state of digital technology, element-level DBF is often impractical for large arrays operating at high frequencies, so subarray level implementations are commonly used to reduce the digital receiver count. The choice of subarray architecture heavily impacts performance due to grating lobes and grating nulls that result from under sampling the array. Adaptive algorithms provide the ability to cancel unwanted jamming and can use low gain auxiliaries, subarrays, and high gain beams as spatial degrees of freedom; each of these work best against jamming located in specific regions of the antenna pattern.

Chapter Contents:

  • 9.1 Introduction
  • 9.2 Digital Beamforming Fundamentals
  • 9.3 Adaptive Jammer Cancellation
  • 9.4 Adaptive Beamformer Architectures
  • 9.5 Wideband Cancellation
  • 9.6 Summary
  • 9.7 Further Reading
  • 9.8 References
  • 9.9 Problems

Inspec keywords: array signal processing; frequency-domain analysis; radar signal processing; phased array radar

Other keywords: digital technology; subarray architecture; unwanted jamming; spatial domain; spatial degrees of freedom; frequency domain; digital beamforming architecture; adaptive digital beamforming; grating null; grating lobe; adaptive filter; wideband operation; element-level digital beamforming; phased array radar; digital receiver count reduction; antenna pattern

Subjects: Mathematical analysis; Radar equipment, systems and applications; Signal processing and detection

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