Method and device for channel estimation
A method for channel estimation includes: performing channel estimation using all DM-RSs in N continuous repeated CORESETs, where N is a positive integer greater than 1; in which the N continuous repeated CORESETs correspond to the same frequency domain resource and/or the same precoding matrix.
1. A method for channel estimation, performed by a terminal device, comprising:
performing channel estimation using all demodulation reference signals (DM-RSs) included in N continuous repeated control-resource sets (CORESETs), where N is a positive integer greater than 1;
wherein, the N continuous repeated CORESETs correspond to both of the same frequency domain resource and the same precoding matrix, the same precoding matrix is obtained by precoding on the N continuous CORESETs using a same precoder;
wherein, M CORESETs in the N continuous repeated CORESETs are continuous on a time domain and other N-M CORESETs and the M CORESETs are discontinuous on the time domain, where 1<M<N.
2. The method as claimed in claim 1 , further comprising:
receiving configuration information, to determine a value of N based on the configuration information;
or,
determining a value of N based on a communication protocol.
3. The method as claimed in claim 1 , wherein,
the N continuous repeated CORESETs correspond to a same DM-RS pattern.
4. The method as claimed in claim 3 , wherein,
the DM-RS pattern comprises a first DM-RS pattern;
wherein, the first DM-RS pattern comprises at least twelve resource elements: the DM-RSs being distributed on a second resource element, a sixth resource element and a tenth resource element of the at least twelve resource elements of an orthogonal frequency division multiplexing (OFDM) symbol in a CORESET, respectively.
5. The method as claimed in claim 1 , wherein,
the N continuous repeated CORESETs correspond to different DM-RS patterns.
6. The method as claimed in claim 5 , wherein,
the different DM-RS patterns comprising a first DM-RS pattern and a second DM-RS pattern;
wherein, distribution on a frequency domain of the second DM-RS pattern and distribution on a frequency domain of the first DM-RS pattern are different and independent with each other.
7. The method as claimed in claim 6 , wherein,
the first DM-RS pattern comprises DM-RSs being distributed on a second resource element, a sixth resource element and a tenth resource element of at least twelve resource elements of an OFDM symbol in a CORESET, respectively.
8. The method as claimed in claim 5 , wherein,
the different DM-RS patterns comprise a first DM-RS pattern and a second DM-RS pattern;
wherein, the second DM-RS pattern is a pattern formed after the first DM-RS pattern is shifted on a frequency domain;
in a case that a shifted resource element is a d th resource element, where d is an integer greater than 12 or less than 1, modulo operation is performed on d using 12 to obtain e, and the DM-RS on an e th resource element exists in a CORESET corresponding to the second DM-RS pattern.
9. The method as claimed in claim 5 , further comprising:
receiving configuration information from a network device; and
determining the different DM-RS patterns corresponding to the N continuous repeated CORESETs based on the configuration information.
10. The method as claimed in claim 1 , wherein, a time domain length of each CORESET in the N continuous repeated CORESETs comprises any one of:
one OFDM symbol, two OFDM symbols or three OFDM symbols.
11. A method for channel estimation, performed by a network device, comprising:
transmitting N continuous repeated control-resource sets (CORESETs), where N is a positive integer greater than 1;
wherein, the N continuous repeated CORESETs correspond to one or both of the same frequency domain resource and the same precoding matrix, the same precoding matrix is obtained by precoding on the N continuous CORESETs using a same precoder, and all demodulation reference signals (DM-RSs) included in the N continuous repeated CORESETs are configured for channel estimation by a terminal device;
wherein, M CORESETs in the N continuous repeated CORESETs are continuous on a time domain and other N-M CORESETs and the M CORESETs are discontinuous on the time domain, where 1<M<N.
12. The method as claimed in claim 11 , further comprising:
transmitting configuration information for determining a value of N.
13. The method as claimed in claim 11 , wherein,
the N continuous repeated CORESETs correspond to a same DM-RS pattern,
the DM-RS pattern comprises a first DM-RS pattern;
wherein, the first DM-RS pattern comprises: DM-RSs being distributed on a second resource element, a sixth resource element and a tenth resource element of at least twelve resource elements of an orthogonal frequency division multiplexing (OFDM) symbol in a CORESET, respectively.
14. The method as claimed in claim 11 , wherein,
the N continuous repeated CORESETs correspond to different DM-RS patterns,
the different DM-RS pattern comprises a first DM-RS pattern and a second DM-RS pattern;
wherein, distribution on a frequency domain of the second DM-RS pattern and distribution on a frequency domain of the first DM-RS pattern are different and independent with each other.
15. The method as claimed in claim 14 , wherein,
the first DM-RS pattern comprises DM-RSs being distributed on a second resource element, a sixth resource element and a tenth resource element of at least twelve resource elements of an OFDM symbol in a CORESET, respectively.
16. The method as claimed in claim 14 , further comprising:
transmitting configuration information to the terminal device;
wherein, the configuration information is configured to configure the different DM-RS patterns corresponding to the N continuous repeated CORESETs.
17. The method as claimed in claim 11 , wherein,
wherein, the second DM-RS pattern is a pattern formed after the first DM-RS pattern is shifted on the frequency domain;
in a case that a shifted resource element is a d th resource element, where d is an integer greater than 12 or less than 1, modulo operation is performed on d using 12 to obtain e, and the DM-RS on an e th resource element exists in a CORESET corresponding to the second DM-RS pattern.
18. The method as claimed in claim 11 , wherein, a time domain length of each CORESET in the N continuous repeated CORESETs comprises any one of:
one OFDM symbol, two OFDM symbols or three OFDM symbols.
19. A terminal device, comprising:
a processor;
a transceiver connected to the processor; and
a memory configured to store instructions executable by the processor;
wherein, the processor is configured to load and execute the executable instructions to:
perform channel estimation using all demodulation reference signals (DM-RSs) included in N continuous repeated control-resource sets (CORESETs), where N is a positive integer greater than 1;
wherein, the N continuous repeated CORESETs correspond to one or both of the same frequency domain resource and the same precoding matrix, the same precoding matrix is obtained by precoding on the N continuous CORESETs using a same precoder;
wherein, M CORESETs in the N continuous repeated CORESETs are continuous on a time domain and other N-M CORESETs and the M CORESETs are discontinuous on the time domain, where 1<M<N.
20. A network device, comprising:
a processor;
a transceiver connected to the processor; and
a memory configured to store instructions executable by the processor;
wherein, the processor is configured to load and execute the executable instructions to perform the method as claimed in claim 11 .