发明名称 |
Adaptive modulation/demodulation method and radio communications systems |
摘要 |
Adaptive modulation/demodulation method in a radio communication system is provided. A modulation multi-level number in a transmission device and a demodulation multi-level number in a reception device are judged independently from each other according to a propagation condition and communication is performed by controlling the likelihood when the multi-level numbers of the transmission side and the reception side are different. The reception device can perform operation by controlling likelihood information on lower bit of the multi-level modulation even when the modulation multi-level number and the demodulation multi-level number used at the transmission side are different. Moreover, the transmission device and the reception device independently decide the modulation multi-level number and the demodulation multi-level number, thereby following an instantaneous propagation fluctuation and improving the throughput.
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申请公布号 |
US7363007(B2) |
申请公布日期 |
2008.04.22 |
申请号 |
US20040894062 |
申请日期 |
2004.07.20 |
申请人 |
HITACHI COMMUNICATION TECHNOLOGIES, LTD. |
发明人 |
HANAOKA SEISHI;TAMAKI SATOSHI;YANO TAKASHI |
分类号 |
H04B7/00;H04L27/18;H04B7/26;H04L1/00;H04L27/00;H04L27/34 |
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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