| Summary: | 碩士 === 國立中央大學 === 電機工程研究所 === 88 === Efficient power control is of great important in the design of high-capacity cellular radio system. Optimum Power Control Scheme (OPCS), in the sense that it minimizes the outage probability. This thesis research in CDMA (Code Division Multiple Access) cellular mobile system, using five Centralized Power Control Algorithms (CPCA), that are SORA (Stepwise Optimal Removal Algorithm), SMIRA (Stepwise Maximum Interference Removal algorithm), SMRIRA (Stepwise Maximum Receiver Interference Removal Algorithm), SMTIRA (Stepwise Maximum Transmitter Interference Removal Algorithm), SRA (Stepwise Removal Algorithm) and combine two kinds of link gain which are empirical predict model and statistical lognormal fading to analyze the performance of uplink and downlink individually. Base on the premise that removal mobile or base station has the same amount. Calculation by many times get the SIR mean and the outage probability under same threshold, we show by result the SORA (uplink and downlink have same SIR) can get greater SIR mean than other algorithms; in another word, the outage probability is smaller than other algorithms. But the calculation is complicated than other (by user’s increasing).
In order to reduce calculation’s complex and improve SIR close to SORA. Throughout this thesis, focus the other four algorithms (SMIRA, SMRIRA, SMTIRA, SRA) by combining up/down to go on the performance analysis. The conclusion is using the above-mentioned algorithms that will have the SIR mean close to the SORA. We will keep discussing.
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