Performance Analysis of Hybrid ARQ Protocols in a Slotted Code Division Multiple-Access Network

Abstract

A link throughput-delay analysis is presented for a slotted direct- sequence spread-spectrum multiple-access packet radio network (PRN) operating in the presence of background noise, multiple-access interference, and pulsed jammer noise. The PRN is comprised of an arbitrary number of full-duplex radio units arranged in a paired-off topology. Slotted ALOHA random access is used in conjunction with CDMA for channel access and a type I hybrid ARQ is used for error control. Expression are derived for the link throughput-delay in terms of the channel cutoff rate and capacity. With the friendly objective of maximizing the link throughput, and the enemy objective of minimizing the link throughput, the dependency of the optimal retransmission probability, processing gain, code rate, and jamming fraction on the population size, traffic intensity, bit energy-to-background-noise ratio, is examined in detail. It is shown that properly designed (optimized) PRN using random-access CDMA offers a significantly larger heavy load throughput than a random-access PRN. Theses.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1989
Accession Number
ADA211078

Entities

People

  • Joseph M. Hanratty

Organizations

  • Georgia Tech

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Background Noise
  • Code Division Multiple Access
  • Coding
  • Communication Channels
  • Communication Systems
  • Decoders
  • Decoding
  • Digital Communications
  • Error Correction Codes
  • Frequency
  • Frequency Division Multiple Access
  • Modulation
  • Multiple Access
  • Probability
  • Probability Distributions
  • Spread Spectrum
  • Time Division Multiple Access

Readers

  • Radio communications and signal processing.