发明名称 |
MIMO ANTENNA APPARATUS CHANGING ANTENNA ELEMENTS BASED ON TRANSMISSION CAPACITY |
摘要 |
A controller of a MIMO antenna apparatus calculates a current transmission capacity based on signal levels detected by a signal level detector circuit. The controller calculates an estimated transmission capacity assuming that at least one of antenna elements currently connected to a MIMO modulator and demodulator circuit is changed to a further antenna element not connected to the MIMO modulator and demodulator circuit, based on the detected signal levels and degrees of electromagnetic coupling stored in a degree-of-coupling memory. The controller controls a switch circuit to connect the further antenna element to the MIMO modulator and demodulator circuit when the current transmission capacity becomes lower than the estimated transmission capacity.
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申请公布号 |
US2009196371(A1) |
申请公布日期 |
2009.08.06 |
申请号 |
US20090361770 |
申请日期 |
2009.01.29 |
申请人 |
YAMAMOTO ATSUSHI;IWAI HIROSHI;SAKATA TSUTOMU;KOYANAGI YOSHIO;HAYASHI TOSHITERU |
发明人 |
YAMAMOTO ATSUSHI;IWAI HIROSHI;SAKATA TSUTOMU;KOYANAGI YOSHIO;HAYASHI TOSHITERU |
分类号 |
H04L1/02 |
主分类号 |
H04L1/02 |
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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