An Analog Delay Network for Adaptive Beamforming.

Abstract

Implementation of the adaptive beamforming algorithms of Widrow and Griffiths requires the use of tapped delay lines to synthesize transversal filters. An all digital processor can provide ideal delays by means of shift registers, but the main disadvantage of such an approach is the large number of multiply-add operations which must be performed during each sampling interval. This problem can be solved by implementing a hybrid system in which the weight values are calculated digitally and then used to control the gains at taps on an analog delay line. Since rather large amounts of delay over broad bandwidths are often required, one could use conventional LC delay networks. However, it would be preferable to use circuits which consume much less space. The purpose of this memorandum is to describe such a network.

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Document Details

Document Type
Technical Report
Publication Date
Dec 30, 1968
Accession Number
ADA060232

Entities

People

  • Ronald R. Kneipfer

Organizations

  • Navy Underwater Sound Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Bandwidth
  • Broadband
  • Circuits
  • Cross Correlation
  • Delay Lines
  • Filters
  • Frequency
  • Generators
  • Hybrid Systems
  • Low Pass Filters
  • Networks
  • Noise Generators
  • Shift Registers
  • Underwater Sound

Readers

  • Phased Array Antenna Design.
  • Statistical inference.

Technology Areas

  • Space