Channel state information acquisition state, channel state information feedback method and apparatus
A technology of channel state information and channel estimation, which is applied in transmission path sub-channel allocation, wireless communication, signaling allocation, etc., can solve the problems of large-scale MIMO systems without CSI feedback technology solutions, and achieve the effect of simplified design and implementation
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[0034] In the embodiment of the present invention, an Orthogonal Frequency Division Multiplexing (OFDM) system is taken as an example for description, such as an LTE-Advanced system. All descriptions are for one subcarrier unless otherwise specified. In the embodiment of the present invention, lowercase bold letters indicate column vectors, and uppercase bold letters indicate matrices. Represents the Kronecker product, the superscript "T" represents the transpose of a matrix or vector, and the superscript "H" represents the conjugate transpose of a matrix or vector.
[0035] Such as figure 1 As shown, a method for acquiring channel state information provided by an embodiment of the present invention includes:
[0036] Step 101: The network device receives the CSI fed back by the terminal, where the CSI at least includes first-level precoding matrix indication information, and the first-level precoding matrix indication information is used to indicate that Q antenna ports are sendin...
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