CPC H04B 7/0456 (2013.01) | 20 Claims |
1. A precoding matrix determining method, comprising:
receiving, by a terminal device, first precoding indication information from a network device; and
determining, by the terminal device from a first codebook set, a first precoding matrix indicated by the first precoding indication information, wherein the first precoding matrix is useable for generating data to be sent on an antenna port of the terminal device, wherein
the first codebook set includes the first precoding matrix, a second precoding matrix, and a third precoding matrix, an element at a first position in the first precoding matrix is equal to a value of exponentiation with a first value as an exponent and a natural constant as a base, an element at a first position in the second precoding matrix is equal to a value of exponentiation with a second value as an exponent and a natural constant as a base, an element at a first position in the third precoding matrix is equal to a value of exponentiation with a third value as an exponent and a natural constant as a base, the first value, the second value, and the third value are different pure imaginary numbers, and at least one element in the first precoding matrix is a complex number whose real part and imaginary part are not zero.
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