发明名称 |
Device and method for reducing the peak-to-average power ratio of a mobile station's transmit power |
摘要 |
A device and method are provided for reducing the peak-to-average power ratio of a mobile station's transmit power in a mobile communication system by spreading and modulating the transmission data by a complex spreading sequence. The complex spreading sequence is generated to have a plurality of chips and a phase difference of 90° between every two successive complex chips in response to each chip of a PN (Pseudo Noise) sequence. The device and method flexibly control the mobile transmit power by limiting its peak-to-average power ratio to a specific range and thus confining the mobile transmit power to a linear characteristic portion in a characteristic curve of a power amplifier. The phase of the complex spreading sequence is prevented from shifting by 180° (i.e., pi) to maintain the mobile transmit power in the linear portion of the power amplifier characteristic curve.
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申请公布号 |
US6459723(B1) |
申请公布日期 |
2002.10.01 |
申请号 |
US19990310389 |
申请日期 |
1999.05.12 |
申请人 |
SAMSUNG ELECTRONICS, CO., LTD. |
发明人 |
KIM JE-WOO;HWANG YOUNG-JUN;YOON SOON-YOUNG;YEOM JAE-HEUNG |
分类号 |
H04B1/707;H04B7/005;(IPC1-7):H04B1/707 |
主分类号 |
H04B1/707 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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