Accession Number:

AD0876519

Title:

Adaptive Signal Processing for the Defense Communications System.

Descriptive Note:

Final rept. Oct 68-May 70,

Corporate Author:

HUGHES AIRCRAFT CO FULLERTON CA GROUND SYSTEMS GROUP

Personal Author(s):

Report Date:

1970-10-01

Pagination or Media Count:

260.0

Abstract:

An adaptive system capable of responding to media degradation was designed and tested over a 12,000 nautical mile, 4 kHz Defense Communication System DCS Circuit. The design was initiated by conducting circuit tests on a typical 12,000 nautical miles DCS circuit and was then followed by performance of a survey of adaptive techniques and applicable state-of-the-art equipment. Analyses were performed on the effect of circuit drop outs upon matched filter detection and burst correcting coders to guide equipment selection. The tests proved that the circuit tested was capable of supporting 9600 bits per second transmission rates, and verified that logic employed in the system performed reliably and permitted automatic selection of the transmission mode, which maximized block throughput for a given set of channel characteristics.

Subject Categories:

  • Radio Communications
  • Voice Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE