发明名称 |
Radio communication apparatus and radio communication method |
摘要 |
A disclosed radio communication apparatus includes a precoding unit, a optimum transmit power calculation unit and a transmission unit. The optimum transmit power calculation unit receives the transmit weight related information from the precoding unit and calculates a transmit power level to optimize an objective function in accordance with an interior point method. The objective function results from addition of a barrier function adjusted with a barrier parameter to an original objective function associated with a constrained optimization problem. The original objective function includes a function of respective channel capacities for individual users derived from the transmit weight related information. The optimum transmit power calculation unit adaptively updates a logarithm of the barrier parameter and uses a gradient obtained through a high-order derivative with the logarithm of the barrier parameter to calculate the transmit power level to optimize the resulting objective function. |
申请公布号 |
US8224369(B2) |
申请公布日期 |
2012.07.17 |
申请号 |
US20090432230 |
申请日期 |
2009.04.29 |
申请人 |
OHWATARI YUSUKE;BENJEBBOUR ANASS;OOYA TOMOYUKI;HAGIWARA JUNICHIRO;NTT DOCOMO, INC. |
发明人 |
OHWATARI YUSUKE;BENJEBBOUR ANASS;OOYA TOMOYUKI;HAGIWARA JUNICHIRO |
分类号 |
H04B7/00 |
主分类号 |
H04B7/00 |
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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