Performance Considerations of Code Division Multiple-Access Systems

Abstract

The performance of code division multiple-access (CDMA) systems is determined using direct-sequence spectral spreading. Asynchronous users are assumed so that there is no network control. Under relatively ideal conditions, the degradation in system performance as a function of the number of users is shown to have a threshold effect. This basic limitation in the number of users of the system is further limited if the powers are unequal. For two users, system performance as a function of their power ratios also has a threshold effect. System performance as a function of the amount of spectral spreading is determined. The performance of both coded and uncoded systems is predicted.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1981
Accession Number
ADA103561

Entities

People

  • Bartus H. Batson
  • Charles L. Weber
  • Gaylord K. Huth

Organizations

  • University of Southern California

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Code Division Multiple Access
  • Coding
  • Communication Systems
  • Cross Correlation
  • Degradation
  • Electrical Engineering
  • Engineering
  • Information Science
  • Information Theory
  • Multiple Access
  • Probability
  • Random Variables
  • Sequences
  • Signal Processing
  • Space Communications
  • Spread Spectrum
  • Threshold Effects

Readers

  • Radio communications and signal processing.