Digital Correlation of Spread - Spectrum Signals Via Frequency Domain Processing.

Abstract

Background information on the theory behind processing spread-spectrum synchronization data in the frequency domain is presented. The derivation shows tha the time domain pseudo-noise sequence offset is represented in the frequency domain by frequency modulation on a known carrier wave. Following the background development is a detailed description of the analog hardware used to implement the frequency domain processing techniques. A proposed method of digitally extracting the synchronization data by Fourier transforming the analog output signal is presented. The digital processor designed and built to sample, average, and calculate a Fast Fourier Transform of the analog data is described in detail. Results obtained from both the analog and digital hardware are discussed, comparing the actual results to those predicted for various inputs. The results validate the processing concepts, and indicate areas for further research. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1982
Accession Number
ADA127434

Entities

People

  • Joseph A. Carretto Jr

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Carrier Waves
  • Computer Programs
  • Computers
  • Control Systems
  • Electrical Engineering
  • Fast Fourier Transforms
  • Fourier Transformation
  • Frequency
  • Frequency Shift
  • Global Positioning Systems
  • Microsecond Time
  • Modulation
  • Signal Processing
  • Spread Spectrum
  • Surface Acoustic Wave Devices
  • Surface Acoustic Waves
  • Time Domain

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Radio communications and signal processing.
  • Wave Propagation and Nonlinear Chaotic Dynamics.