CN-116366400-B - Channel estimation method, device, terminal, network equipment and medium

CN116366400BCN 116366400 BCN116366400 BCN 116366400BCN-116366400-B

Abstract

The application discloses a channel estimation method, a device, a terminal, network side equipment and a medium, which belong to the technical field of communication, and the channel estimation method provided by the embodiment of the application comprises the steps that UE receives first target information from communication equipment, wherein the first target information is used for indicating that BSC equipment sends back scattering signal parameters or whether joint channel estimation is carried out on the first signal; and the UE determines whether to perform joint channel estimation on the first signal according to the first target information, wherein the back scattering signal is obtained by modulating the first signal by BSC equipment.

Inventors

JIANG DAJIE
HUANG WEI
JIAN RONGLING

Assignees

维沃移动通信有限公司

Dates

Publication Date: 20260505
Application Date: 20211227

Claims (20)

1. A method of channel estimation, the method comprising: The user equipment UE receives first target information from the communication device, wherein the first target information is used for indicating parameters of a back scattering signal sent by the back scattering communication BSC device; The UE determines whether to perform joint channel estimation on a first signal according to the first target information, wherein the first signal is sent to the UE by the communication equipment; the back scattering signal is obtained by modulating the first signal by the BSC equipment.
2. The method of claim 1, wherein the first target information is used to indicate parameters of the BSC device to send the backscatter signal; the parameters of the BSC apparatus transmitting the backscatter signal include at least one of: the BSC equipment transmits the target time information of the back scattering signal; At least one period length of the backscatter signal; the symbol length of the backscattered signal; a transmission duration of the backscatter signal; The modulation mode of the back scattering signal; The coding mode of the back scattering signal; the length of the delimiter of the backscattered signal; A time offset of the delimiter; a length of a preamble of the backscatter signal; A time offset of the preamble; synchronization related information of the BSC device; The BSC equipment carries out frequency shift related information on the first signal; A target duration; wherein the delimiter is used for indicating the starting moment of the back scattering signal; the target duration is the minimum duration that the amplitude and phase of the backscatter signal are unchanged.
3. The method of claim 2, wherein the target time information comprises any one of: first time information including at least one of aperiodic transmission mode information and aperiodic-transmission time information; And second time information including at least one of periodic transmission mode information, a transmission period, and time information of periodic transmission.
4. The method of claim 2, wherein the synchronization related information of the BSC device includes at least one of: the starting time of the symbol or time slot of the backscatter signal; Deviation information between the timing of the BSC device and a target timing, the target timing comprising any one of the timing of the first signal, the timing of the communication device.
5. The method of claim 2, wherein the information related to the BSC device's frequency shifting the first signal comprises at least one of: whether or not frequency shifting is supported; A center frequency point after frequency point movement; Bandwidth after frequency point movement.
6. The method according to any one of claims 2 to 5, wherein the first target information includes the target duration; the UE determining, according to the first target information, whether to perform joint channel estimation on the first signal, including: In the case that the target time-frequency resource of the backscattered signal sent by the BSC device overlaps with the time-frequency resource of the first signal, the UE determines to perform the joint channel estimation in the target duration; the target time-frequency resource is determined according to the first target information.
7. The method of claim 6, wherein the UE determining to perform the joint channel estimation for a target duration comprises: In the case that the target time length is greater than or equal to the length of the N time units of the first signal, the UE determines to perform the joint channel estimation in the N time units in the target time length; The method further comprises the steps of: In the case that the target duration is less than the length of the N time units of the first signal, the UE determines that the joint channel estimation in the N time units is not performed in the target duration; Wherein N is a positive integer.
8. The method of claim 1, wherein the communication device comprises any one of a base station, the BSC device, and other UEs.
9. The method of claim 8, wherein the first target information is determined by the communication device based on second target information; the second target information is used for indicating parameters of the BSC equipment for sending the back scattering signals, and the second target information is sent to the communication equipment by first equipment, wherein the first equipment comprises any one of the BSC equipment and the other UE.
10. The method of claim 1, wherein prior to the UE receiving the first target information from the communication device, the method further comprises: the UE sends a first request message to the communication device, wherein the first request message is used for requesting the BSC device to send the parameters of the back scattering signal.
11. The method of claim 10, wherein the UE sending a first request message to the communication device comprises: In the event that the UE determines that the received signal correlates with the backscattered signal, the UE sends the first request message to the communication device.
12. The method of claim 1, wherein prior to the UE receiving the first target information from the communication device, the method further comprises: The UE receives a second request message from the communication device, the second request message requesting that the UE determine whether the received signal is associated with the backscatter signal; In the case that the UE determines the received signal and the back-scattered signal, the UE sends a first feedback message to the communication equipment, wherein the first feedback message is used for indicating that the signal received by the UE is related to the back-scattered signal; Wherein the first target information is sent by the communication device when the first feedback message is received.
13. The method of claim 12, wherein the second request message comprises at least one of: A third request message for requesting the UE to determine whether a signal received on a target resource is associated with the backscatter signal, the target resource comprising at least one of a target time domain resource and a target frequency domain resource; and a fourth request message for requesting that the UE determine whether target sequence information is received, the target sequence information being associated with an identity of the BSC device or with a scrambling sequence of the backscattered signal.
14. A method of channel estimation, the method comprising: the communication equipment sends first target information to the UE, wherein the first target information is used for indicating that BSC equipment sends back scattering signal parameters; the BSC equipment modulates a first signal, wherein the first signal is sent to the UE by the communication equipment; The first target information is used for determining whether to perform joint channel estimation on the first signal by the UE.
15. The method of claim 14, wherein prior to the communication device transmitting the first target information to the UE, the method further comprises: The communication device receives second target information from the first device; the BSC equipment is used for sending the back scattering signal parameters, wherein the second target information is used for indicating the BSC equipment to send the back scattering signal parameters; The first device comprises any one of the BSC device and other UE.
16. The method of claim 15, wherein prior to the communication device receiving the second target information from the first device, the method further comprises: the communication device sends a fifth request message to the first device, the fifth request message requesting the BSC device to send the parameters of the backscatter signal.
17. The method of claim 14, wherein prior to the communication device transmitting the first target information to the UE, the method further comprises: The communication device sends a second request message to the UE, wherein the second request message is used for requesting the UE to determine whether the received signal is related to the back scattering signal; the communication device sending first target information to the UE, comprising: transmitting the first target information to the UE in case the communication device receives a first feedback message from the UE; the first feedback message is used for indicating that the signal received by the UE is related to the back scattering signal.
18. The channel estimation device is characterized by being a first channel estimation device, and the first channel estimation device comprises a receiving module and a determining module; The receiving module is used for receiving first target information from the second channel estimation device, wherein the first target information is used for indicating parameters of a backscattering signal transmitted by the backscattering communication BSC equipment; The determining module is configured to determine, according to the first target information received by the receiving module, whether to perform joint channel estimation on a first signal, where the first signal is sent by the second channel estimation device to the first channel estimation device; the back scattering signal is obtained by modulating the first signal by the BSC equipment.
19. The channel estimation apparatus of claim 18 wherein said first target information is used to indicate parameters of said BSC device transmitting said backscatter signal; the parameters of the BSC apparatus transmitting the backscatter signal include at least one of: the BSC equipment transmits the target time information of the back scattering signal; At least one period length of the backscatter signal; the symbol length of the backscattered signal; a transmission duration of the backscatter signal; The modulation mode of the back scattering signal; The coding mode of the back scattering signal; the length of the delimiter of the backscattered signal; A time offset of the delimiter; a length of a preamble of the backscatter signal; A time offset of the preamble; synchronization related information of the BSC device; The BSC equipment carries out frequency shift related information on the first signal; A target duration; wherein the delimiter is used for indicating the starting moment of the back scattering signal; the target duration is the minimum duration that the amplitude and phase of the backscatter signal are unchanged.
20. The channel estimation device of claim 19 wherein the target time information comprises any of: first time information including at least one of aperiodic transmission mode information and aperiodic-transmission time information; And second time information including at least one of periodic transmission mode information, a transmission period, and time information of periodic transmission.

Description

Channel estimation method, device, terminal, network equipment and medium Technical Field The application belongs to the technical field of communication, and particularly relates to a channel estimation method, a device, a terminal, network side equipment and a medium. Background Currently, in backscatter communications (BackScatter Communication, BSC), a BSC device may modulate radio frequency signals sent by other devices to generate a backscatter signal associated with the radio frequency signal, where the backscatter signal carries data information of the BSC device, so that a receiving device may demodulate the backscatter signal to obtain the data information. However, since the radio frequency signal may be sent towards a User Equipment (UE), in this case, channel estimation performed by the UE on the radio frequency signal may be affected by a backscatter signal associated with the radio frequency signal, and thus performance of the channel estimation may be affected. In this way, the performance of the UE in demodulating the radio frequency signal is reduced. Disclosure of Invention The embodiment of the application provides a channel estimation method, a device, a terminal, network side equipment and a medium, which can solve the problem of lower performance of demodulating radio frequency signals by UE. In a first aspect, a channel estimation method is provided and applied to a UE, where the method includes that the UE receives first target information from a communication device, where the first target information is used to indicate whether a BSC device sends parameters of a back-scattered signal or performs joint channel estimation on a first signal, and the UE determines whether to perform joint channel estimation on the first signal according to the first target information, where the back-scattered signal is obtained by modulating the first signal by the BSC device. In a second aspect, a channel estimation device is provided, which is a first channel estimation device, and the first channel estimation device includes a receiving module and a determining module. The receiving module is used for receiving first target information from the second channel estimation device, wherein the first target information is used for indicating parameters of a back scattering signal sent by the BSC device or whether joint channel estimation is carried out on the first signal. And the determining module is used for determining whether to perform joint channel estimation on the first signal according to the first target information received by the receiving module, wherein the back scattering signal is obtained by modulating the first signal by BSC equipment. In a third aspect, a channel estimation method is provided for a communication device, the method comprising the communication device sending first target information to a UE, the first target information being used to indicate parameters of a backscatter signal sent by a BSC device, or whether joint channel estimation is performed on the first signal. The back scattering signal is obtained by modulating a first signal by BSC equipment, and the first target information is used for determining whether to perform joint channel estimation on the first signal by UE. In a fourth aspect, a channel estimation device is provided, the channel estimation device being a second channel estimation device comprising a transmission module. The sending module is used for sending first target information to the first channel estimation device, wherein the first target information is used for indicating parameters of a back scattering signal sent by BSC equipment or whether joint channel estimation is carried out on the first signal. The back scattering signal is obtained by modulating a first signal by BSC equipment, and the first target information is used for determining whether to perform joint channel estimation on the first signal by UE. In a fifth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the method according to the first aspect, or performs the steps of the method according to the third aspect. In a sixth aspect, a terminal is provided that includes a processor and a communication interface, where the communication interface is configured to receive first target information from a communication device, where the first target information is configured to indicate parameters of a backscatter signal sent by a BSC device, or whether to perform joint channel estimation on the first signal. The processor is used for determining whether to perform joint channel estimation on the first signal according to the first target information, wherein the back scattering signal is obtained by modulating the first signal by BSC equipment. In a seventh aspect, a network side device is provided, comprising a processor and a memory