Abstract
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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4G | 10/06/2010 | ISLD-201006-004 | FREESCALE SEMICONDUCTOR INC |
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Specification Information
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