CPC H04B 7/0626 (2013.01) [H04B 7/0417 (2013.01); H04B 7/0456 (2013.01); H04B 7/0639 (2013.01); H04W 72/0453 (2013.01)] | 20 Claims |
1. A channel state information (CSI) feedback method, comprising:
determining, by a terminal, precoding matrix indication information (PMI), wherein:
the PMI comprises:
first base vector information associated with first base vectors;
second base vector information associated with second base vectors; and
second coefficient information, used to derive first coefficients and second coefficients, the second coefficient information comprising second coefficient amplitude information and second coefficient phase information; and
a CSI feedback band comprises a plurality of frequency domain units, each frequency domain unit having a plurality of frequency domain resources and the frequency domain units respectively belong to a plurality of frequency domain unit sets; and
feeding back, by the terminal, CSI containing the PMI to a base station.
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