Pseudonoise Spread-Spectrum Systems for Military Communications.
Abstract
The basic characteristics of various pseudonoise spread-spectrum systems are discussed with emphasis on direct-sequence modulation. A necessary condition is derived for the concealment of a pseudonoise waveform from detection. The condition establishes a lower bound for the pseudonoise code length. The bit error probability in the presence of various types of interference is determined. It is shown that if the total bandwidth and the word duration are fixed, the potential improvement in performance due to error-correction coding is partially counterbalanced by the resulting decrease in processing gain. Methods of reducing the mutual interference in a network of pseudonoise systems are examined. Jamming strategies, acquisition techniques, and hybrid frequency-hopping pseudonoise systems are discussed. Differences in the error rate performance between frequency-hopping systems and pseudonoise systems are illustrated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1979
- Accession Number
- ADA087701
Entities
People
- Don J. Torrieri