Performance of rateless codes in ALOHA WANETs

Amogh Rajanna, Itsik Bergel, Mostafa Kaveh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we study the performance of wireless adhoc networks (WANETs) that employ rateless error correction codes. We consider a WANET which uses constant power for all transmissions and adapts the pure ALOHA as the channel access protocol. The locations of nodes are modeled by a homogeneous space time Poisson point process with Rayleigh fading. The paper quantifies the rate density and the dynamic variations of packet transmission time by deriving an upper bound on the CCDF of the packet transmission time. The rate density of rateless codes is compared to two benchmarks, the ergodic rate density (ERD) and the rate density of fixed rate codes. The considered rateless coding scheme is attractive, as it does not require time diversity, and each packet is transmitted within a single coherence time. Yet the derived bound shows that the rate density of rateless codes can be quite close to the ergodic rate density. Thus, the presented network has near ERD performance while maintaining shorter delays. We also demonstrate that rateless codes achieve a higher rate density than fixed rate codes.

Original languageEnglish (US)
Title of host publicationSPAWC 2015 - 16th IEEE International Workshop on Signal Processing Advances in Wireless Communications
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages166-170
Number of pages5
Volume2015-August
ISBN (Electronic)9781479919307
DOIs
StatePublished - Aug 27 2015
Event16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2015 - Stockholm, Sweden
Duration: Jun 28 2015Jul 1 2015

Other

Other16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2015
CountrySweden
CityStockholm
Period6/28/157/1/15

Keywords

  • Coherence
  • Delays
  • Fading
  • Interference
  • Receivers
  • Transmitters
  • Wireless communication

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