Accession Number:

AD0911805

Title:

Digital Troposcatter: State-of-the-Art Modulation Techniques.

Descriptive Note:

Technical rept.,

Corporate Author:

ARMY ELECTRONICS COMMAND FORT MONMOUTH NJ

Personal Author(s):

Report Date:

1973-06-01

Pagination or Media Count:

33.0

Abstract:

This report concerns a survey of state-of-the-art modulation techniques used for the transmission of high speed digital data over strategic troposcatter communications links. These links are characterized by conditions of dispersive multipath, selective fading, and severe path loss. It is shown that four level phase shift keying is a relatively optimum technique in order to obtain data packing of one bit per Hertz with relatively simple implementation. An overview of all promising anti-multipath techniques including time gating, parallel processing, adaptive equalization, and Viterbi decoding is given in the context of performance evaluation and risk assessment.

Subject Categories:

  • Cybernetics
  • Electricity and Magnetism
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE