Open Access

Enhancing the Performance of Random Access Networks with Random Packet CDMA and Joint Detection

  • Roland Kempter1Email author,
  • Peiman Amini2 and
  • Behrouz Farhang-Boroujeny2
EURASIP Journal on Advances in Signal Processing20082009:238103

https://doi.org/10.1155/2009/238103

Received: 17 January 2008

Accepted: 29 July 2008

Published: 5 August 2008

Abstract

Random packet CDMA (RP-CDMA) is a recently proposed random transmission scheme which has been designed from the beginning as a cross-layer method to overcome the restrictive nature of the Aloha protocol. Herein, we more precisely model its performance and investigate throughput and network stability. In contrast to previous works, we adopt the spread Aloha model for header transmission, and the performance of different joint detection methods for the payload data is investigated. Furthermore, we introduce performance measures for multiple access systems based on the diagonal elements of a modified multipacket reception matrix, and show that our measures describe the upper limit of the vector of stable arrival rates for a finite number of users. Finally, we simulate queue sizes and throughput characteristics of RP-CDMA with various receiver structures and compare them to spread Aloha.

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Authors’ Affiliations

(1)
Military Air Systems, EADS Deutschland GmbH
(2)
Department of Electrical and Computer Engineering, University of Utah

Copyright

© Roland Kempter et al. 2009

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.