Accession Number:

AD0777897

Title:

Performance of Soft Limiting PSK and DPSK Spread Spectrum Systems.

Descriptive Note:

Final rept. Nov 72-Oct 73,

Corporate Author:

PHILCO-FORD CORP PALO ALTO CALIF WESTERN DEVELOPMENT LABS DIV

Personal Author(s):

Report Date:

1974-02-01

Pagination or Media Count:

192.0

Abstract:

An analytical study and investigation is carried out to model a phase-coded spread-spectrum communication system containing a soft-limiting satellite repeater. Useful mathematical expressions are obtained for the bit error probability for both coherent PSK and differential PSK biphase data modulation combined with phase-coded biphase or quadriphase spread-spectrum modulation. A study of soft limiter models is performed, resulting in the selection of the error function amplitude characteristic to represent the soft-limiting repeater nonlinearity. The error function model provides the flexibility to represent all degrees of soft limiting from a linear repeater to a hard-limiter. Included in the study are the effects of both up-link and down-link noise as well as CW jamming at the limiter input. Modified author abstract

Subject Categories:

  • Cybernetics
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE