发明授权
US5991636A Adaptive power control method for a CDMA mobile radio telephone system
失效
CDMA移动无线电话系统的自适应功率控制方法
- 专利标题: Adaptive power control method for a CDMA mobile radio telephone system
- 专利标题(中): CDMA移动无线电话系统的自适应功率控制方法
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申请号: US915945申请日: 1997-08-21
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公开(公告)号: US5991636A公开(公告)日: 1999-11-23
- 发明人: Seok-Ho Won , In-Myoung Jeong , Whan-Woo Kim , Duck-Bin Im
- 申请人: Seok-Ho Won , In-Myoung Jeong , Whan-Woo Kim , Duck-Bin Im
- 申请人地址: KRX Daejon
- 专利权人: Electronics and Telecommunications Research Institute
- 当前专利权人: Electronics and Telecommunications Research Institute
- 当前专利权人地址: KRX Daejon
- 优先权: KRX96-34590 19960821
- 主分类号: H04B7/005
- IPC分类号: H04B7/005 ; H04Q7/20
摘要:
An adaptive power control method for a CDMA mobile radio telephone system is disclosed which operates similarly to a fixed increment and decrement power control method in the portion where the slope of the channel signal due to a fading effect is steep when the transmission power of a mobile station is adjusted. In the portion where the slope of the channel signal is gentle, like the peak portion of the channel signal, the granular noise can be improved by using the Jayant's equations. In accordance with the present invention, the fading effect in the mobile radio channel can be efficiently compensated without giving much load to a forward link since a mobile station determines the variation of the backward channel signal by using the statistical characteristics of a power control command (1 bit) transmitted from a base station. Further, an amount of interferences among a plurality of users can be reduced because the variation (variance) of a receiving power at the base station caused by the fading effect in each mobile station is made small. Thus, the overall performance of the system can be significantly improved in accordance with the present invention.
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