Effect of Power-update Rate and Power-update Step Size on Outage Probability of Cdma Systems
نویسندگان
چکیده
The CDMA system has been used extensively in satellite communications. This is due to advantages of spread spectrum techniques used in CDMA systems, and their higher capacity in compare to FDMA & TDMA systems [1]. However, since the advantage of CDMA is related to interference level, CDMA systems needs to have perfect power control for minimizing the interference and obtaining required qualities. Power update rate and step size are two most important parameters which have the high effects on the precision of power control. Power update rate and power update step size are related to satellites propagation channel conditions, and should be determined based on rate and level of fading in the channel. In this paper the effects of these parameters (i.e. power update rate and step size) are investigated and the outage probability is calculated and compared for different values of these parameters. Based on our results it will be shown that, the outage probability is highly related to the variation of the above mentioned parameters. Our results are demonstrated by different curves and graphs.
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