IP Library › Granted Patent US 12676774

Granted Patent B2

US 12676774 · App. 18/033,354 · Granted Jul 7, 2026

Channel estimation method, apparatus, and storage medium

Inventors: Qiuping Huang (Beijing, CN); Xin Su (Beijing, CN)

Assignee: DATANG MOBILE EQUIPMENT CO., LTD.

H04L25/0204 H04B7/06968 H04L5/0051 H04L25/0224

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Quick Facts

Patent No.: US 12676774
App. No.: 18/033,354
Granted: Jul 7, 2026
Kind: B2

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Abstract

The present application provides a channel estimation method, apparatus, and a storage medium. The channel estimation method includes: receiving indication information transmitted by a network device, where the indication information is used to indicate that a first signal and/or a first demodulation reference signal DMRS port of the first signal satisfy a first quasi co-location QCL relationship with first reference signals, and the first QCL relationship includes that a channel of the first signal and/or a channel of the first DMRS port is associated with at least one large-scale property of channels of the plurality of first reference signals; and performing, according to the indication information, channel estimation of the first signal based on the plurality of first reference signals. In embodiments of the present application, a result of channel estimation by a terminal device is relatively accurate, thus improving the performance of signal demodulation.

Claims (74)

1 . A channel estimation method, comprising:

receiving indication information transmitted by a network device, wherein the indication information is used to indicate that at least one of a first signal or a first demodulation reference signal (DMRS) port of the first signal satisfy a first quasi co-location (QCL) relationship with a plurality of first reference signals, and the first QCL relationship comprises that at least one of a channel of the first signal or a channel of the first DMRS port is associated with channels of the plurality of first reference signals in respect of at least one large-scale property; and

performing, according to the indication information, channel estimation of the first signal based on the plurality of first reference signals;

wherein the indication information comprises at least one piece of transmission configuration indicator (TCI) state information, and the indication information comprises identification information of the plurality of first reference signals and a parameter used to indicate the at least one large-scale property, and the identification information of the plurality of first reference signals is contained in a same piece of TCI state information; or

the indication information comprises plural pieces of TCI state information, and the indication information comprises identification information of the plurality of first reference signals and a parameter used to indicate the at least one large-scale property, the identification information of the plurality of first reference signals is contained in the plural pieces of TCI state information, wherein each piece of TCI state information at most comprises identification information of one of the first reference signals; or

the indication information comprises at least one piece of TCI state information, wherein each piece of TCI state information comprises one or more pieces of large-scale property indication information, and in case plural pieces of TCI state information are comprised, a different piece of TCI state information comprises large-scale property indication information indicating a different large-scale property;

wherein the at least one large-scale property comprises Doppler property, the method further comprises:

determining a reference property of the channel of the first signal according to a second reference signal, wherein the second reference signal is part of the plurality of first reference signals; or determining a reference property of the channel of the first signal according to a second reference signal, wherein the second reference signal is a reference signal different from the plurality of first reference signals;

wherein the reference property is different from the Doppler property and the reference property comprises a delay property.

2 . The method according to claim 1 , wherein the performing the channel estimation of the first signal based on the plurality of first reference signals comprises performing at least one of:

acquiring at least one large-scale property of the channel of at least one of the first signal or the first DMRS port of the first signal according to the channels of the plurality of first reference signals, or, acquiring at least one channel estimation parameter according to the channels of the plurality of first reference signals; or

performing the channel estimation of the first signal according to at least one of the at least one large-scale property or the at least one channel estimation parameter.

3 . The method according to claim 1 , wherein the channel of at least one of the first signal or the first DMRS port of the first signal is a channel on a same time-frequency resource block.

4 . The method according to claim 1 , wherein transmission antennas of the plurality of first reference signals are different, and the first signal is transmitted simultaneously on the transmission antennas respectively corresponding to the plurality of first reference signals.

5 . The method according to claim 1 , wherein an indication manner of the indication information comprises:

indicating, respectively for each first reference signal of the plurality of first reference signals, a parameter used to indicate a corresponding large-scale property of the first reference signal; or

indicating at least one parameter used to indicate a large-scale property, and indicating, respectively for each parameter used to indicate the large-scale property, a first reference signal corresponding to the parameter.

6 . The method according to claim 5 , wherein the parameter used to indicate the large-scale property is a QCL type, the indication information comprises at least two QCL types, and the at least two QCL types comprise at least one of the following:

a first QCL type and a second QCL type;

a first QCL type, a second QCL type and a third QCL type;

a second QCL type and a fourth QCL type; or

a second QCL type, a third QCL type and a fourth QCL type;

wherein the first QCL type comprises Doppler shift, Doppler spread, average delay and delay spread;

the second QCL type comprises Doppler shift and Doppler spread;

the third QCL type comprises spatial receive parameter; and

the fourth QCL type comprises average delay and delay spread.

7 . The method according to claim 1 , wherein

the method further comprises:

determining Doppler property of the channel of the first signal according to at least one first reference signal for which a corresponding QCL type is a first QCL type and at least one first reference signal for which a corresponding QCL type is a second QCL type; or

determining the Doppler property of the channel of the first signal according to a plurality of first reference signals for which a QCL type is the second QCL type; or

determining the Doppler property of the channel of the first signal according to a plurality of first reference signals for which a QCL type is the first QCL type;

wherein the QCL type is a parameter used to indicate a large-scale property, a large-scale property indicated by the first QCL type comprises Doppler shift, Doppler spread, average delay and delay spread, and a large-scale property indicated by the second QCL type comprises Doppler shift and Doppler spread.

8 . The method according to claim 1 , wherein the determining the reference property of the channel of the first signal according to the second reference signal comprises:

determining the reference property of the channel of the first signal according to a plurality of second reference signals for which a QCL type is a first QCL type; or

determining the reference property of the channel of the first signal according to a plurality of second reference signals for which a QCL type is a fourth QCL type;

wherein the QCL type is a parameter used to indicate a large-scale property, a large-scale property indicated by the first QCL type comprises Doppler shift, Doppler spread, average delay and delay spread, and a large-scale property indicated by the fourth QCL type comprises the average delay and the delay spread.

9 . A channel estimation method, comprising:

determining indication information, wherein the indication information is used to indicate that at least one of a first signal or a first demodulation reference signal (DMRS) port of the first signal satisfy a first quasi co-location (QCL) relationship with a plurality of first reference signals, and the first QCL relationship comprises that at least one of a channel of the first signal or a channel of the first DMRS port is associated with channels of the plurality of first reference signals in respect of at least one large-scale property; and

transmitting the indication information to a terminal device, wherein the indication information is used to indicate the terminal device to perform channel estimation of the first signal based on the plurality of first reference signals;

wherein the at least one large-scale property comprises Doppler property; wherein the indication information is further used to indicate that the first signal or the first DMRS port is associated with a second reference signal in respect of a reference property of a channel, wherein the second reference signal is part of the plurality of first reference signals; or the indication information is further used to indicate that the first signal or the first DMRS port is associated with a second reference signal in respect of a reference property of a channel, wherein the second reference signal is a reference signal different from the plurality of first reference signals;

wherein the reference property is different from the Doppler property and the reference property comprises a delay property.

10 . The method according to claim 9 , wherein transmission antennas of the plurality of first reference signals are different, and the first signal is transmitted simultaneously on the transmission antennas respectively corresponding to the plurality of first reference signals.

11 . The method according to claim 9 , wherein an indication manner of the indication information comprises:

12 . The method according to claim 11 , wherein the parameter used to indicate the large-scale property is a QCL type, the indication information comprises at least two QCL types, and the at least two QCL types comprise at least one of the following:

a first QCL type and a second QCL type;

a first QCL type, a second QCL type and a third QCL type;

a second QCL type and a fourth QCL type; or

a second QCL type, a third QCL type and a fourth QCL type;

wherein the first QCL type comprises Doppler shift, Doppler spread, average delay and delay spread;

the second QCL type comprises Doppler shift and Doppler spread;

the third QCL type comprises spatial receive parameter; and

the fourth QCL type comprises average delay and delay spread.

13 . The method according to claim 9 , wherein the indication information is further used to indicate the terminal device to determine Doppler property of the channel of the first signal according to at least one first reference signal for which a corresponding QCL type is a first QCL type and at least one first reference signal for which a corresponding QCL type is a second QCL type; or is further used to indicate the terminal device to determine the Doppler property of the channel of the first signal according to a plurality of first reference signals for which a QCL type is the second QCL type; or is further used to indicate the terminal device to determine the Doppler property of the channel of the first signal according to a plurality of first reference signals for which a QCL type is the first QCL type;

14 . The method according to claim 9 , wherein the indication information is further used to indicate the terminal device to determine the reference property of the channel of the first signal according to a plurality of second reference signals for which a QCL type is a first QCL type; or is further used to indicate the terminal device to determine the reference property of the channel of the first signal according to a plurality of second reference signals for which a QCL type is a fourth QCL type;

wherein the QCL type is a parameter used to indicate a large-scale property, a large-scale property indicated by the first QCL type comprises Doppler shift, Doppler spread, average delay and delay spread, and a large-scale property indicated by the fourth QCL type comprises the average delay and the delay spread.

15 . A terminal device, comprising: a memory, a transceiver and a processor,

wherein the memory is configured to store a computer program; the transceiver is configured to transmit and receive data under control of the processor; the processor is configured to read the computer program in the memory and execute operations of:

performing, according to the indication information, channel estimation of the first signal based on the plurality of first reference signals;

wherein the at least one large-scale property comprises Doppler property, the processor is further configured to read the computer program in the memory and execute operations of:

determining a reference property of the channel of the first signal according to a second reference signal; wherein the second reference signal is part of the plurality of first reference signals; or

determining a reference property of the channel of the first signal according to a second reference signal; wherein the second reference signal is a reference signal different from the plurality of first reference signals;

wherein the reference property is different from the Doppler property and the reference property comprises a delay property.

16 . A network device, comprising: a memory, a transceiver and a processor,