Performance of Multiple Satellite Systems with Common Downlink Frequency Hopping Patterns.

Abstract

This report considers a situation in which more than one satellite transmitting frequency-hopped signal is in view of a given terminal. If it is desired that the satellites use the same frequency hopping pattern for ease of acquisition and handover, then a receiver which is in range of more than one satellite may encounter interference. This interference is analyzed for a generalized system of two satellites modelled after the LES-8/9 system. Upperbounds for the probability of error are derived for receivers using a square-law combining rule. This expression is evaluated for the LES-8/9 system, using two different downlink codes. It is seen that the choice of code makes a significant difference in system performance, and that with a suitably chosen code, two satellites may use the same frequency hopping pattern without significant performance degradation. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 29, 1980
Accession Number
ADA085590

Entities

People

  • Jeannine Mosely

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Acquisition
  • Artificial Satellites
  • Automatic Frequency Control
  • Bessel Functions
  • Buildings And Structures
  • Computer Programs
  • Computers
  • Degradation
  • Doppler Effect
  • Filters
  • Frequency
  • Frequency Agility
  • Frequency Shift
  • Integrals
  • Probability
  • Random Variables
  • Terminals

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Radio communications and signal processing.
  • Space Exploration and Orbital Mechanics.

Technology Areas

  • Space
  • Space - Satellites