UCT CS Research Document Archive

Modelling a DS-CDMA fading Channel with Bursty Traffic Arrivals

Landman, Jesse (2003) Modelling a DS-CDMA fading Channel with Bursty Traffic Arrivals. Technical Report CS04-02-00, Department of Computer Science, University of Cape Town.

Full text available as:
Postscript - Requires a viewer, such as GhostView
PDF - Requires Adobe Acrobat Reader or other PDF viewer.


We propose an analytic model for the performance of a faded DS­CDMA radio channel carrying bursty traffic. For the IP traffic model we propose a two­state Markov Modulated Poisson Process (MMPP) to model slow Poisson arrivals of packets interspersed by bursts of IP traffic with a much higher arrival rate.
The channel model is a modified multi­state Gilbert­Elliot model which takes into account both the number of interfering users and whether the channel is in a faded or non­faded state. We analyse both Ricean and Rayleigh distributions for the user signal. For the final result we relied on a discrete event simulation of the same DS­CDMA radio channel data transmission process in order to parameterise the model. Results for metrics such as the slot success rate as a function of the number of interfering users and the packet throughput as a function of the IP traffic arrival rate are derived.

EPrint Type:Departmental Technical Report
Subjects:C Computer Systems Organization: C.2 COMPUTER-COMMUNICATION NETWORKS
ID Code:112
Deposited By:Landman, Jesse
Deposited On:22 April 2004