Accession Number:

ADA300627

Title:

Spread Spectrum Modulation by Means of Time-Varying Linear Filtering.

Descriptive Note:

Final rept.,

Corporate Author:

NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA

Personal Author(s):

Report Date:

1995-03-01

Pagination or Media Count:

24.0

Abstract:

Time-varying linear filtering can be used to generate a broad class of spread spectrum signals which includes Direct Sequence spread spectrum as a special case. The technique is based on a fflter of arbitrary length whose impulse response changes rapidly It can spread the data signal in time as well as in frequency, thereby introducing a form of protection from errors similar to error-correcting coding and interleaving. Time-varying filter TVF systems can produce a broad range of noise-like waveforms and can be designed to minimize spillover into adjacent frequency regions. These properties should provide benefits in defense as well as in civilian radio communication systems.

Subject Categories:

  • Radiofrequency Wave Propagation
  • Operations Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE