发明名称 |
MIMO precoding enabling spatial multiplexing, power allocation and adaptive modulation and coding |
摘要 |
In a closed-loop wireless communication system, a codebook-based feedback mechanism is provided to enable non-unitary precoding for multi-stream transmission, where in each stream is optimized with suitable transmission power allocation and AMC. The codebook-based feedback mechanism uses a precoding codebook having a power allocation matrix which is constrained to specify that beamforming always applies full power to a predetermined beam. With this constraint, a one-bit power allocation feedback index may be used to switch between beamforming and spatial multiplexing. |
申请公布号 |
US8229019(B2) |
申请公布日期 |
2012.07.24 |
申请号 |
US20100762013 |
申请日期 |
2010.04.16 |
申请人 |
KOTECHA JAYESH H.;HUANG KAIBIN;APPLE INC. |
发明人 |
KOTECHA JAYESH H.;HUANG KAIBIN |
分类号 |
H04L27/10 |
主分类号 |
H04L27/10 |
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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