Channel measurement method and communication apparatus
This application provides example channel measurement methods and example communication apparatuses. One example method includes determining L weighting coefficients for determining channels of K moments based on channels of M moments, where L, M, and K are all positive integers. Information about the L weighting coefficients can then be sent.
1. A channel measurement method, comprising:
determining L weighting coefficients for determining channels of K moments based on channels of M moments, wherein L, M, and K are positive integers, wherein determining the L weighting coefficients comprises calculating L′ weighting coefficients using O groups of channels, and wherein O and L′ are integers greater than or equal to 1, and L′ is less than or equal to L; and
sending information about the L weighting coefficients.
2. The method according to claim 1 , wherein the method further comprises sending information about T measurement channels, wherein the T measurement channels are in N times of channel measurements, wherein N and T are positive integers, and Tis greater than or equal to L.
3. The method according to claim 1 , wherein determining the L weighting coefficients comprises:
calculating the L weighting coefficients based on P measurement channels, wherein P is greater than or equal to L.
4. The method according to claim 3 , wherein:
a time interval between any two adjacent channels in the P measurement channels is same as a time interval between any two adjacent channels in at least L measurement channels in T measurement channels.
5. The method according to claim 1 , wherein the method further comprises obtaining information about a parameter O, wherein:
calculating the L′ weighting coefficients using the O groups of channels comprises:
calculating the L′ weighting coefficients based on the L and the parameter O using the O groups of channels; and
sending the information about the L weighting coefficients comprises:
sending information about the L′ weighting coefficients.
6. The method according to claim 5 , wherein obtaining information about the parameter O comprises:
determining a target {L, O} from one or more groups of {L, O}; and
determining a value of the L and a value of the parameter O based on the target {L, O}.
7. A communication apparatus, comprising:
at least one processor; and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to perform operations comprising:
determining L weighting coefficients for determining channels of K moments based on channels of M moments, wherein L, M, and K are positive integers, wherein determining the L weighting coefficients comprises calculating L′ weighting coefficients using O groups of channels, and wherein O and L′ are integers greater than or equal to 1, and L′ is less than or equal to L; and
sending information about the L weighting coefficients.
8. The communication apparatus according to claim 7 , wherein the operations comprise sending information about T measurement channels, wherein the T measurement channels are in N times of channel measurements, wherein N and T are positive integers, and T is greater than or equal to L.
9. The communication apparatus according to claim 7 , wherein the operations comprise:
calculating the L weighting coefficients based on P measurement channels, wherein P is greater than or equal to L.
10. The communication apparatus according to claim 9 , wherein:
a time interval between any two adjacent channels in the P measurement channels is same as a time interval between any two adjacent channels in at least L measurement channels in T measurement channels.
11. The communication apparatus according to claim 7 , wherein the operations comprise obtaining information about a parameter O, wherein:
calculating the L′ weighting coefficients using the O groups of channels comprises:
calculating the L′ weighting coefficients based on the L and the parameter O using the O groups of channels; and
sending the information about the L weighting coefficients comprises:
sending information about the L′ weighting coefficients.
12. The communication apparatus according to claim 11 , wherein the operations comprise:
determining a target {L, O} from one or more groups of {L, O}; and
determining a value of the L and a value of the parameter O based on the target {L, O}.
13. The communication apparatus according to claim 12 , wherein each of the one or more groups of {L, O} corresponds to one or more of the following information:
measurement duration, a pilot time-domain density, a quantity of pilot transmissions, a pilot transmission periodicity, and a moving speed.
14. The communication apparatus according to claim 12 , wherein the operations comprise:
sending indication information, wherein the indication information indicates an index of the target {L, O}.
15. A communication apparatus, comprising:
at least one processor; and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to perform operations comprising:
receiving information about L weighting coefficients, wherein the L weighting coefficients are used to determine channels of K moments based on channels of M moments, wherein L, M, and K are positive integers, wherein receiving the information about the L weighting coefficients comprises receiving information about L′ weighting coefficients, wherein the L′ weighting coefficients are calculated using O groups of channels, and wherein both O and L′ are integers greater than or equal to 1, and L′ is less than or equal to L; and
determining the L weighting coefficients.
16. The communication apparatus according to claim 15 , wherein the operations comprise receiving information about T measurement channels, wherein the T measurement channels are in N times of channel measurements, wherein N and T are positive integers, and T is greater than or equal to L.
17. The communication apparatus according to claim 15 , wherein the operations comprise sending information indicating a parameter O and the L, wherein
the L′ weighting coefficients are calculated based on the parameter O and the L using the O groups of channels.
18. The communication apparatus according to claim 17 , wherein the operations comprise:
sending information indicating one or more groups of {L, O}, wherein the one or more groups of {L, O} are used to determine a value of the L and a value of the parameter O.
19. The communication apparatus according to claim 18 , wherein each of the one or more groups of {L, O} corresponds to one or more of the following information:
measurement duration, a pilot time-domain density, a quantity of pilot transmissions, a pilot transmission periodicity, and a moving speed.
20. The communication apparatus according to claim 18 , wherein the operations comprise:
receiving indication information, wherein the indication information indicates an index of a target {L, O} in the one or more groups of {L, O}, and the target {L, O} is used to determine the L and the parameter O.