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MIMO precoding enabling spatial multiplexing, power allocation and adaptive modulation and coding
MIMO precoding enabling spatial multiplexing, power allocation and adaptive modulation and coding
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机译:MIMO预编码可实现空间复用,功率分配以及自适应调制和编码
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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.
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