Abstract
In this paper the impact of the voice activity detection process and the powercontrolsystem on the average signal-to-interference ratio (SIR) is investigatedconcerningthe uplink of a single cell code division multiple access (CDMA) based mobilecommunication system. In the literature lower bounds on the average SIR areoftenemployed. Here we show the applicability of such bounds. For this purpose theresultsobtained from these bounds are compared with results obtained fromsimulations.Especially, for a few number of subscribers the differences between the lowerboundand the exact values are significant. Furthermore, the variance of the SIR isinvestigated for different parameters. We found out that significantvariations occurwhich affect the outage probability. But, many authors often employ only theaverageSIR, e.g. for their capacity estimations. However, the variance of the SIR hasto betaken into consideration too.
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References
A.J. Viterbi, CDMA Principles of Spread Spectrum Communication, Addison Wesley Publishing Company, 1995.
K.S. Gilhousen, I.M. Jacobs, R. Padovani, A.J. Viterbi, L.A. Weaver Jr. and C.E. Wheatley III, “On the Capacity of a Cellular CDMA System”, IEEE Transactions on Vehicular Technology, Vol. 40, pp. 303–312, 1991.
H. Boche and E. Jugl, “Analysis of Factors to Increase the Capacity of CDMA Based Mobile Communication Systems”, in Proc. ACTS Mobile Communications Summit'99, Sorrento, June 1999, pp. 925–930.
E. Jugl and H. Boche, “Limits of Sectorization Gain Caused by Mobility and Soft Handoff”, Electronics Letters, Vol. 35, pp. 119–120, 1999.
H. Boche and E. Jugl, “Restrictions of the Voice Activity Gain and Consequences for CDMA Based Mobile Communication Systems”, International Journal of Electronics and Communications AEÑ, Vol. 54, pp. 51–58, 2000.
E. Jugl and H. Boche, “Effect of the Fluctuation of the Voice Activity Factor on CDMA System Capacity”, in Proc. International Workshop on Mobile Communications IWMC'99, Chania, Crete, June 1999, pp. 310–320.
E. Jugl and H. Boche, “New Techniques for the Calculation of the Average SIR and the Outage Probability of the Uplink of CDMA Systems”, in Proc. IEEE Wireless Communications and Networking Conference WCNC2000, Chicago, pp. 1477–1481, 2000.
C.-C. Lee and R. Steele, “Effect of Soft and Softer Handoffs on CDMA System Capacity”, IEEE Transactions on Vehicular Technology, Vol. 47, pp. 830–841, 1998.
R. Prasad, M.G. Jansen, and A. Kegel, “Capacity Analysis of a Cellular Direct Sequence Code Division Multiple Access System with Imperfect Power Control”, IEICE Transactions on Communications, Vol. E76-B, pp. 894–905, 1993.
R. Prasad, A. Kegel, and M.G. Jansen, “Effect of Imperfect Power Control on Cellular Code Division Multiple Access System”, Electronics Letters, Vol. 28, pp. 848–849, 1992.
P. T. Brady, “A Statistical Analysis of On-Off Patterns in 16 Conversations”, Bell System Technical Journal, Vol. 47, pp. 73–91, 1968.
P.T. Brady, “A Model for Generating On-Off Speech Patterns in Two Way Conservation”, Bell System Technical Journal, Vol. 48, pp. 2445–2472, 1969.
L.F. Fenton, “The Sum of Log-Normal Probability Distributions in Scatter Transmission Systems”, IRE Transactions on Communications Systems, Vol. C5-8, pp. 57–67, 1960.
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Boche, H., Jugl, E. Influence of Discontinuous Transmission and Power Control on the Average SIR and the Outage Probability of the Uplink of CDMA Systems. Wireless Personal Communications 20, 285–303 (2002). https://doi.org/10.1023/A:1014490726660
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DOI: https://doi.org/10.1023/A:1014490726660