US 2026/0230147 A1Published application

Basis feedback method and apparatus

AssigneeHuawei Technologies Co., Ltd.

InventorsChencheng Ye, Yiling Yuan, Junhui Gao, Xiaohan Wang

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Abstract

A basis feedback method and an apparatus are provided to implement an effective solution of feeding back a weighting coefficient matrix in a non-DFT basis. In this application, when a spatial domain eigenbasis and a frequency domain eigenbasis (or a space-frequency eigenbasis) are reported, the spatial domain eigenbasis and the frequency domain eigenbasis are decomposed based on a spatial domain basis and a frequency domain basis (or the space-frequency eigenbasis is decomposed based on a space-frequency basis); the spatial domain eigenbasis and the frequency domain eigenbasis (or the space-frequency eigenbasis) are respectively indicated by reporting weighting coefficients obtained through decomposition; and a reporting priority of the weighting coefficient is associated with a sequence number of a spatial domain basis, a sequence number of a frequency domain basis, a sequence number of a spatial domain eigenbasis, and a sequence number of a frequency domain eigenbasis.

Claims20

Dependent claims

A basis feedback method, comprising:

receiving a reference signal from an access network device, wherein the reference signal indicates a terminal device to feed back a used spatial domain eigenbasis and a used frequency domain eigenbasis;
and
sending first indication information to the access network device, wherein the first indication information indicates a first weighting coefficient matrix and a second weighting coefficient matrix, wherein
a weighted sum of the first weighting coefficient matrix and 2L′ spatial domain bases in a spatial domain basis set is used to determine Ks spatial domain eigenbases, and a weighted sum of the second weighting coefficient matrix and Mv′ frequency domain bases in a frequency domain basis set is used to determine Kf frequency domain eigenbases;
and
reporting priorities of a plurality of non-zero first weighting coefficients in the first weighting coefficient matrix are related to sequence numbers of spatial domain bases associated with the non-zero first weighting coefficients and sequence numbers of spatial domain eigenbases associated with the non-zero first weighting coefficients, and reporting priorities of a plurality of non-zero second weighting coefficients in the second weighting coefficient matrix are related to sequence numbers of frequency domain bases associated with the non-zero second weighting coefficients and sequence numbers of frequency domain eigenbases associated with the non-zero second weighting coefficients.

3 more elements

A basis feedback method, comprising:

receiving a reference signal from an access network device, wherein the reference signal indicates a terminal device to feed back a used space-frequency eigenbasis;
and
sending fourth indication information to the access network device, wherein the fourth indication information indicates a fourth weighting coefficient matrix, wherein a weighted sum of the fourth weighting coefficient matrix and Gsf space-frequency bases is used to determine Ksf space-frequency eigenbases, and reporting priorities of a plurality of non-zero fourth weighting coefficients comprised in the fourth weighting coefficient matrix are related to sequence numbers of space-frequency bases associated with the non-zero fourth weighting coefficients and sequence numbers of space-frequency eigenbases associated with the non-zero fourth weighting coefficients.

A communication apparatus, comprising:

at least one processor wherein the processor is configured to implement the apparatus to:
receive a reference signal from an access network device, wherein the reference signal indicates a terminal device to feed back a used spatial domain eigenbasis and a used frequency domain eigenbasis;
and
send first indication information to the access network device, wherein the first indication information indicates a first weighting coefficient matrix and a second weighting coefficient matrix, wherein
a weighted sum of the first weighting coefficient matrix and 2L′ spatial domain bases in a spatial domain basis set is used to determine Ks spatial domain eigenbases, and a weighted sum of the second weighting coefficient matrix and Mv′ frequency domain bases in a frequency domain basis set is used to determine Kf frequency domain eigenbases;
and
report priorities of a plurality of non-zero first weighting coefficients in the first weighting coefficient matrix are related to sequence numbers of spatial domain bases associated with the non-zero first weighting coefficients and sequence numbers of spatial domain eigenbases associated with the non-zero first weighting coefficients, and reporting priorities of a plurality of non-zero second weighting coefficients in the second weighting coefficient matrix are related to sequence numbers of frequency domain bases associated with the non-zero second weighting coefficients and sequence numbers of frequency domain eigenbases associated with the non-zero second weighting coefficients.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/631,436Filed 27 Mar 2026
Priority: CN 202311283262.928 Sep 2023
Published: 6 Aug 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04B 7/048
Special codebook structures directed to feedback optimisation: using three or more PMIs
H04B 7/063
Feedback content: parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
H04L 5/0048
Arrangements for allocating sub-channels of the transmission path: allocation of pilot signals, i.e. of signals known to the receiver
H04B
Transmission