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Probability of false power control command in CDMA systems subject to measurement errors

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2 Author(s)
Li-Chun Wang ; Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan ; Chih-Wen Chang

In this letter we introduce a new performance measurement, the probability of false power control command (PFC), to evaluate the impact of measurement errors on the closed-loop power control in code division multiple access systems. We derive a closed-form expression for PFC. As compared to the variable-step-sized power control, we find that the fixed-step-sized CLPC scheme, thanks to its nonlinear operation in the up/down control scheme, is less sensitive to the measurement error.

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IEEE Communications Letters  (Volume:9 ,  Issue: 4 )