发明名称 |
CDMA wireless transmission apparatus, CDMA wireless transmitter-receiver system and transmission power control method of the CDMA wireless transmission apparatus |
摘要 |
A control for varying a maximum transmission power of a transmitter according to a propagation loss or a distance between the transmitter and a receiver is made possible to reduce deterioration of a user capacity to a minimum. In a wave propagation loss measurement section, a calculation is performed on the basis of an amplification factor of a reception amplifier, amplitude information and a base station transmission power information of a reception baseband signal to calculate a wave propagation loss of a reception signal, thereby estimating a propagation loss of transmission signal. The wave propagation loss information is inputted to a maximum amplification amount designation circuit to decide a maximum amplification factor. The maximum amplification amount designation circuit adjusts a maximum transmission power of the transmission signal by designating the decided maximum amplification factor to a transmission amplifier.
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申请公布号 |
US7489663(B2) |
申请公布日期 |
2009.02.10 |
申请号 |
US20010950763 |
申请日期 |
2001.09.12 |
申请人 |
NTT DOCOMO |
发明人 |
OGAWA SHINSUKE;OKUMURA YUKIHIKO;HIGASHI AKIHIRO |
分类号 |
H03G3/20;H04B7/216;H04B7/005;H04B7/26;H04M1/73 |
主分类号 |
H03G3/20 |
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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