Multi-loop Power Control
碩士 === 中華大學 === 電機工程學系碩士班 === 91 === In this thesis, multi-loop power control problem for direct sequence code division multiple access (DS-CDMA) systems is considered. The coupling between each single-user power control loop due to multiple access interference (MAI) can be regarded as an...
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| Language: | zh-TW |
| Published: |
2003
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| Online Access: | http://ndltd.ncl.edu.tw/handle/z3aq76 |
| Summary: | 碩士 === 中華大學 === 電機工程學系碩士班 === 91 === In this thesis, multi-loop power control problem for direct sequence code division multiple access (DS-CDMA) systems is considered. The coupling between each single-user power control loop due to multiple access interference (MAI) can be regarded as an external bounded disturbance in the analysis of SINR tracking error. This means that if every single-loop power control system is stable, then so is the overall multi-loop system. On the other hand, to overcome the problem due to round trip delay, a sliding observer is developed to obtain a prediction of signal-to-interference-to-noise ratio (SINR) tracking error. This prediction is then used to construct a sliding power controller for update of power command. Performance of signal-to-interference-to-noise ratio (SINR) tracking is fully analyzed and is verified by simulation study.
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