Channel estimation method, apparatus, terminal, network-side device, and medium

Abstract

This application discloses a channel estimation method, apparatus, terminal, network-side device, and medium, belonging to the field of communication technology. The channel estimation method provided in the embodiments of this application includes: a UE receiving first target information from a communication device, the first target information being used to indicate: parameters of a backscatter signal sent by a BSC device, or whether to perform joint channel estimation on a first signal; the UE determining whether to perform joint channel estimation on the first signal based on the first target information; wherein the backscatter signal is obtained by the BSC device modulating the first signal.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a channel estimation method, apparatus, terminal, network-side equipment, and medium. Background Technology

[0002] Currently, in BackScatter Communication (BSC), a BSC device can modulate radio frequency signals sent by other devices to generate a backscatter signal associated with the radio frequency signal. The backscatter signal carries the data information of the BSC device; thus, the receiving device can demodulate the backscatter signal to obtain the data information.

[0003] However, since this radio frequency signal may be transmitted to the user equipment (UE), the channel estimation performed by the UE on this radio frequency signal may be affected by the backscattered signal associated with the radio frequency signal, thus impacting the performance of the channel estimation. This, in turn, reduces the performance of the UE in demodulating the radio frequency signal. Summary of the Invention

[0004] This application provides a channel estimation method, apparatus, terminal, network-side equipment, and medium that can solve the problem of low performance of UE in demodulating radio frequency signals.

[0005] In a first aspect, a channel estimation method is provided, applied to a UE, the method comprising: the UE receiving first target information from a communication device, the first target information being used to indicate: parameters for a backscattered signal sent by a BSC device, or whether to perform joint channel estimation on a first signal; the UE determining whether to perform joint channel estimation on the first signal based on the first target information; wherein the backscattered signal is obtained by the BSC device modulating the first signal.

[0006] Secondly, a channel estimation apparatus is provided, which is a first channel estimation apparatus, comprising a receiving module and a determining module. The receiving module is configured to receive first target information from a second channel estimation apparatus. This first target information indicates parameters for a backscattered signal transmitted by a BSC device, or whether joint channel estimation should be performed on the first signal. The determining module is configured to determine, based on the first target information received by the receiving module, whether to perform joint channel estimation on the first signal; wherein the backscattered signal is obtained by the BSC device modulating the first signal.

[0007] Thirdly, a channel estimation method is provided, applied to a communication device. The method includes: the communication device sending first target information to a UE, the first target information indicating parameters for a backscattered signal sent by a BSC device, or whether to perform joint channel estimation on a first signal. The backscattered signal is obtained by the BSC device modulating the first signal; the first target information is used by the UE to determine whether to perform joint channel estimation on the first signal.

[0008] Fourthly, a channel estimation apparatus is provided, which is a second channel estimation apparatus, comprising: a transmission module. The transmission module is configured to transmit first target information to a first channel estimation apparatus. The first target information is used to indicate: parameters of a backscattered signal transmitted by a BSC device, or whether to perform joint channel estimation on a first signal. The backscattered signal is obtained by the BSC device modulating the first signal; the first target information is used by the UE to determine whether to perform joint channel estimation on the first signal.

[0009] Fifthly, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect, or implementing the steps of the method as described in the third aspect.

[0010] In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is configured to receive first target information from a communication device, the first target information indicating parameters for a backscattered signal transmitted by a BSC device, or whether to perform joint channel estimation on a first signal. The processor is configured to determine, based on the first target information, whether to perform joint channel estimation on the first signal; wherein the backscattered signal is obtained by the BSC device modulating the first signal.

[0011] In a seventh aspect, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the third aspect.

[0012] Eighthly, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is used to send first target information to a UE, the first target information being used to indicate: parameters of a backscattered signal sent by a BSC device, or whether to perform joint channel estimation on a first signal. The backscattered signal is obtained by the BSC device modulating the first signal; the first target information is used by the UE to determine whether to perform joint channel estimation on the first signal.

[0013] A ninth aspect provides a channel estimation system, comprising: a terminal and a network-side device, wherein the terminal is configured to perform the steps of the method described in the first aspect, and the network-side device is configured to perform the steps of the method described in the third aspect.

[0014] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the third aspect.

[0015] Eleventhly, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the first aspect, or to implement the steps of the method as described in the third aspect.

[0016] In a twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the third aspect.

[0017] In this embodiment, the UE can receive first target information from the communication device, which instructs the BSC device to send a backscattered signal (or whether to perform joint channel estimation on the first signal). This backscattered signal is obtained by the BSC device modulating the first signal. Therefore, the UE can determine whether to perform joint channel estimation on the first signal based on this first target information. Since the UE can determine whether to perform joint channel estimation on the first signal based on the parameters (or whether to perform joint channel estimation on the first signal) of the backscattered signal sent by the BSC device as instructed by the communication device, instead of directly performing joint channel estimation on the first signal, the joint channel estimation performed by the UE on the first signal can be avoided from being affected by the backscattered signal associated with the first signal. This avoids impacting the performance of channel estimation and improves the UE's performance in demodulating radio frequency signals. Attached Figure Description

[0018] Figure 1 This is one of the block diagrams of a wireless communication system provided in the embodiments of this application;

[0019] Figure 2 This is a second block diagram of a wireless communication system provided in the embodiments of this application;

[0020] Figure 3 This is one of the schematic diagrams illustrating the relationship between the transmission duration of each bit of a BSC device and the length of the time slot / subframe of the radio frequency signal;

[0021] Figure 4 This is the second schematic diagram showing the relationship between the transmission duration of each bit of the BSC device and the length of the time slot / subframe of the radio frequency signal;

[0022] Figure 5 This is the third schematic diagram showing the relationship between the transmission duration of each bit of the BSC device and the length of the time slot / subframe of the radio frequency signal;

[0023] Figure 6 This is one of the flowcharts illustrating the channel estimation method provided in the embodiments of this application;

[0024] Figure 7 This is a second schematic flowchart of the channel estimation method provided in the embodiments of this application;

[0025] Figure 8 This is the third flowchart illustrating the channel estimation method provided in the embodiments of this application;

[0026] Figure 9 This is the fourth flowchart illustrating the channel estimation method provided in the embodiments of this application;

[0027] Figure 10 This is one of the structural schematic diagrams of the channel estimation device provided in the embodiments of this application;

[0028] Figure 11 This is a second schematic diagram of the channel estimation device provided in the embodiments of this application;

[0029] Figure 12 This is a schematic diagram of the structure of the communication device provided in the embodiments of this application;

[0030] Figure 13 This is a schematic diagram of the hardware structure of the terminal provided in the embodiments of this application;

[0031] Figure 14 This is a schematic diagram of the hardware structure of the network device provided in the embodiments of this application. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0033] The following will explain the terminology used in the embodiments of this application.

[0034] 1. BSC

[0035] BSC refers to the process by which BSC devices modulate radio frequency signals from other devices (such as UE, network devices, etc.) or the environment to carry the data information of the BSC devices on the radio frequency signals.

[0036] Among them, the BSC device can control the reflection coefficient of the circuit by adjusting its internal impedance, thereby changing the amplitude, frequency, phase, etc. of the radio frequency signal to achieve radio frequency signal modulation.

[0037] BSC devices can be tags in a Radio Frequency Identification (RFID) system, passive Internet of Things (IoT) units, semi-passive IoT units, or reconfigurable intelligent meta-surface (RIS) units in intelligent metasurfaces, etc.

[0038] 2. Backscattered signal

[0039] The signal generated by the BSC device after modulating the radio frequency signal is the backscattered signal associated with that radio frequency signal.

[0040] 3. Other terms

[0041] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first target information can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0042] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0043] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. Terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the specific type of terminal 11 is not limited in this embodiment. Network-side equipment 12 may include access network equipment or core network equipment. Access network equipment 12 may also be referred to as radio access network equipment, radio access network (RAN), radio access network function, or radio access network unit. Access network equipment 12 may include base stations, WLAN access points, or WiFi nodes, etc. Base stations may be referred to as Node B, evolved Node B (eNB), access point, base transceiver station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B node, home evolved B node, Transmitting Receiving Point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that this application embodiment only uses a base station in an NR system as an example for description and does not limit the specific type of base station.

[0044] The channel estimation method, apparatus, terminal, network-side equipment, and medium provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0045] The channel estimation method provided in this application can be applied to BSC scenarios.

[0046] Figure 2 A block diagram of a wireless communication system applicable to embodiments of this application is shown. The wireless communication system includes UE21, UE22, BSC device 23, and other devices (e.g., network-side device 24).

[0047] like Figure 2 As shown, assuming network-side device 24 wants to send data information to UE 21, network-side device 24 can send a radio frequency (RF) signal to UE 21, carrying the data information to be sent by network-side device 24, so that UE 21 can receive the data information to be sent by network-side device 24. Furthermore, BSC device 23 can modulate the data information to be sent by BSC device 23 onto this RF signal, generating a backscattered signal associated with this RF signal, so that UE 22 can receive the data information to be sent by BSC device 23. However, since the channel estimation performed by UE 21 on this RF signal may be affected by the backscattered signal associated with this RF signal, the performance of the channel estimation may be affected.

[0048] The following three examples illustrate how backscattered signals affect the performance of UE channel estimation.

[0049] In one example, such as Figure 3 As shown, assuming the transmission duration of each bit of BSC device 23 is equal to the length of one time slot / subframe of the radio frequency signal, BSC device 23 will occupy one time slot of the radio frequency signal when transmitting 0. According to the principle of ASK modulation based on FM0 code, for example, when BSC device 23 transmits 0, the first half of the time slot is high level and the second half of the time slot is low level; when transmitting 1, the entire time slot is high level. Therefore, when UE21 performs channel estimation interpolation within one time slot of the radio frequency signal, it will be affected by the backscattered signal associated with the radio frequency signal, resulting in a discontinuity in the amplitude of the reference signal in the first half of the time slot and the reference signal in the second half of the time slot, thus affecting the performance of channel estimation.

[0050] In another example, such as Figure 4As shown, assuming the transmission duration of each bit of BSC device 23 is longer than the length of one time slot / subframe of the radio frequency signal, for example, the transmission duration of each bit of BSC device 23 is two time slots / subframes of the radio frequency signal, then BSC device 23 will occupy two time slots of the radio frequency signal when transmitting 0. According to the principle of ASK modulation based on, for example, FM0 code, when BSC device 23 transmits 0, the first time slot is high level and the second time slot is low level. Therefore, when UE21 performs joint channel estimation within the two time slots of the radio frequency signal, it will be affected by the backscattered signal associated with the radio frequency signal, resulting in a discontinuity in the amplitude of the reference signal at the junction of the two time slots, thus affecting the performance of channel estimation.

[0051] In yet another example, such as Figure 5 As shown, assuming the transmission duration of each bit of BSC device 23 is less than the length of one time slot / subframe of the radio frequency signal, for example, the transmission duration of each bit of BSC device 23 is two symbols of the radio frequency signal, then BSC device 23 occupies two symbols of the radio frequency signal when transmitting 0. According to the principle of ASK modulation based on FM0 code, for example, when BSC device 23 transmits 0, the levels of the two symbols are different; when transmitting 1, the levels of the two symbols are the same. Therefore, when UE21 performs joint channel estimation within one time slot of the radio frequency signal, it will be affected by the backscattered signal associated with the radio frequency signal, resulting in a discontinuity in the amplitude of the reference signal of the two symbols, thus affecting the performance of channel estimation.

[0052] In summary, the channel estimation performed by the UE on the radio frequency signal is affected by the backscattered signal associated with the radio frequency signal, which may affect the performance of the channel estimation.

[0053] However, in this embodiment, UE21 can receive indication information from a communication device (e.g., a network device, other UEs, BSC device, etc.). This indication information is used to instruct the BSC device 23 on the parameters for sending backscattered signals (or whether to perform joint channel estimation on the radio frequency signals). Thus, UE21 can directly determine whether to perform joint channel estimation on the radio frequency signals based on this indication information, instead of directly performing joint channel estimation on the radio frequency signals. Therefore, it can avoid affecting the performance of channel estimation.

[0054] Figure 6 A flowchart of a channel estimation method provided in an embodiment of this application is shown. Figure 6 As shown, the channel estimation method provided in this application embodiment may include the following steps 101 to 103.

[0055] Step 101: The communication device sends the first target information to the UE.

[0056] Step 102: The UE receives the first target information from the communication device.

[0057] In this embodiment of the application, the first target information is used to indicate: the parameters of the backscatter signal sent by the BSC device, or whether to perform joint channel estimation on the first signal; the backscatter signal is: obtained by the BSC device modulating the first signal; the first target information is used by the UE to determine whether to perform the joint channel estimation on the first signal.

[0058] Optionally, in the embodiments of this application, the above-mentioned communication equipment includes any one of the following: base station, BSC equipment, and other UE.

[0059] Further optionally, in the embodiments of this application, when the communication device is a base station, the base station can be any of the following: other UEs, relay devices, device-to-device (D2D) devices, sidelink devices, etc.

[0060] Further optionally, in the embodiments of this application, when the communication device is a BSC device, the BSC device can also be a RIS device; wherein, the power supply and radio frequency source (i.e., the first signal) of the BSC device can be the same device or different devices.

[0061] The power supply method for the BSC equipment may include at least one of the following: the BSC equipment is powered by a base station radio frequency signal, the BSC equipment is powered by other radio frequency signals, or the BSC equipment is powered by a non-radio frequency signal. The non-radio frequency signal power supply may include at least one of the following: mechanical power supply, vibration power supply, solar power supply, thermal power supply, etc.

[0062] Optionally, in the embodiments of this application, when the communication device is a base station, the base station can carry the first target information to the UE through downlink control information (DCI), or preamble sequence, or radio resource control (RRC) signaling, or media access control (MAC) control element CE to send the first target information.

[0063] Optionally, in the embodiments of this application, when the communication device is a BSC device (or other UE), the BSC device (or other UE) can carry the first target information to the UE through two-step direct link control information (SCI) or a preamble sequence to carry the first target information.

[0064] Optionally, in this embodiment of the application, the first signal can be a signal sent by the communication device to the UE, or data, etc. In this case, the first target information can be carried in the scheduling signaling (e.g., DCI) of the first signal.

[0065] Optionally, in this embodiment of the application, when the first target information is used to instruct the BSC device to send parameters for the backscatter signal, the parameters may include at least one of the following: time-domain parameters, frequency-domain parameters, etc.; specifically, the parameters may be sent by the BSC device to the communication device. It is understood that the BSC device may report the parameters to the communication device before sending the backscatter signal.

[0066] Optionally, in this embodiment of the application, when the first target information is used to indicate whether to perform joint channel estimation on the first signal, the first target information is determined by the communication device based on the parameters of the backscatter signal sent by the BSC device; wherein, the parameters may specifically be sent by the BSC device to the communication device.

[0067] The following will provide an example of the first target information.

[0068] Optionally, in one possible implementation of this application embodiment, the aforementioned first target information is used to indicate: parameters for the BSC device to transmit backscatter signals; the parameters for the BSC device to transmit backscatter signals include at least one of the following:

[0069] Target time information, which indicates the time when the BSC device sends the backscatter signal;

[0070] The length of at least one period of the backscattered signal;

[0071] The symbol length of the backscattered signal;

[0072] The transmission duration of the backscattered signal;

[0073] Modulation method of backscattered signal;

[0074] Encoding method for backscattered signals;

[0075] The length of the delimiter of the backscattered signal;

[0076] Time offset of the delimiter;

[0077] The length of the preamble in the backscattered signal;

[0078] Preamble time offset;

[0079] Information related to the synchronization of BSC devices;

[0080] Information related to frequency shifting of the first signal by the BSC device;

[0081] Target duration.

[0082] Optionally, in this embodiment of the application, the aforementioned target time information is specifically used to indicate the possible time period during which the BSC device sends backscatter signals.

[0083] Optionally, in this embodiment of the application, the target time information includes any one of the following:

[0084] First-time information, which includes at least one of: aperiodic transmission mode information and aperiodic transmission time information;

[0085] The second time information includes at least one of the following: periodic transmission mode information, transmission period, and periodic transmission time information.

[0086] Specifically, the time information for non-periodic transmission can be the possible time period for non-periodic transmission, such as 4 AM to 5 AM during the day.

[0087] The transmission cycle can specifically be: the duration of one transmission cycle (e.g., a 10ms transmission cycle), the signal transmission time including the backscattered signal within one cycle (e.g., 5ms), and the time during which no signal is transmitted (e.g., 5ms). During the time when the BSC device is not transmitting a signal, it can perform energy harvesting.

[0088] The time information for periodic transmission can specifically refer to the possible time periods for periodic transmission. For example, which periods might be used to transmit information.

[0089] Optionally, in the embodiments of this application, each period length in at least one period length of the backscattered signal can be at least one of the following: the length of a subframe or time slot, the number of symbols contained in a subframe or time slot, etc.

[0090] Optionally, in this embodiment, the symbol length of the backscattered signal can be the time length occupied by the BSC device transmitting 0 or 1. For example, transmitting 0 or 1 occupies one subframe or time slot.

[0091] Optionally, in this embodiment, the transmission duration of the backscattered signal can specifically be the length of the transmission period of the backscattered signal. It is understood that the UE needs to buffer the backscattered signal of this transmission duration before demodulation.

[0092] Optionally, in the embodiments of this application, the modulation method of the backscattered signal can be: a modulation method based on FMO code.

[0093] Optionally, in this embodiment, the encoding method of the backscattered signal can be Miller encoding, Manchester encoding, FMO code, etc. The encoding method determines the minimum time granularity of the high-low level transition within a symbol.

[0094] In this embodiment of the application, the delimiter is used to indicate the start time of the backscattered signal; the preamble is used by the receiving device of the backscattered signal for synchronization or channel estimation.

[0095] Optionally, in this embodiment of the application, the synchronization-related information of the BSC device includes at least one of the following:

[0096] The sign of the backscattered signal or the start time of the time slot;

[0097] The deviation information between the timing of the BSC device and the target timing, which includes any one of the following: the timing of the first signal, or the timing of the communication device.

[0098] Further optionally, in the embodiments of this application, the starting time of the symbol or time slot of the backscattered signal can be: an absolute time or a relative time.

[0099] For example, assuming the starting time is T1, if this starting time is an absolute time, then the starting time of the symbol or time slot of the backscattered signal is T1.

[0100] When the starting time is a relative time, the starting time of the symbol or time slot of the backscattered signal can be: the time before (or after) the target time T1; wherein, the target time can be the starting time of the symbol or time slot of the first signal.

[0101] Optionally, in this embodiment of the application, the relevant information for the BSC device to shift the frequency of the first signal includes at least one of the following:

[0102] Does it support frequency shifting?

[0103] The center frequency after the frequency point is moved;

[0104] Bandwidth after frequency relocation.

[0105] In this embodiment of the application, the target duration is the minimum duration during which the amplitude and phase of the backscattered signal remain unchanged.

[0106] Optionally, in this embodiment, the minimum duration for which the amplitude and phase of the backscattered signal remain unchanged can be an absolute value or a time unit length. The time unit can be any of the following: a time slot, a subframe, a symbol, a micro-time slot, a mini-time slot, etc.

[0107] For example, the minimum duration for which the amplitude and phase of the backscattered signal remain unchanged can be 1 ms, or the symbol length of at least two first signals, or the subframe or time slot length of at least two first signals.

[0108] Optionally, in another possible implementation of this application embodiment, the aforementioned first target information is used to indicate whether to perform joint channel estimation on the first signal; the first target information includes at least one of the following:

[0109] The first indication information is used to indicate that the UE does not perform joint channel estimation for the first signal within M time units;

[0110] The second indication information is used to instruct the UE to perform joint channel estimation on the first signal within M time units.

[0111] The third indication information is used to indicate that the UE does not perform joint channel estimation for T symbols on the first signal;

[0112] The fourth indication information is used to indicate that the UE performs a joint channel estimation of T symbols for the first signal;

[0113] The fifth indication information is used to indicate that the UE performs joint channel estimation for the first signal within R time units.

[0114] In this embodiment of the application, the above T symbols are symbols in the same time unit, M and T are both positive integers greater than 1, and R is a decimal greater than 0 and less than 1.

[0115] Alternatively, in the embodiments of this application, R can be a decimal greater than 0.5 and less than 1. For example, R can be 0.6 or 0.75, etc.

[0116] In this embodiment, the parameters for the backscatter signal transmitted by the BSC device can be pre-configured in the communication device, or the communication device can obtain the parameters for the backscatter signal transmitted by the BSC device from other devices (such as the BSC device, other UEs, etc.) in advance, so that the communication device can send the first target information to the UE according to the parameters. The following example illustrates how the communication device obtains the parameters of the backscatter signal:

[0117] Optionally, in the embodiments of this application, combined with Figure 6 ,like Figure 7 As shown, prior to step 101 above, the channel estimation method provided in this application embodiment may further include step 201 below.

[0118] Step 201: The communication device receives the second target information from the first device.

[0119] In this embodiment of the application, the second target information is used to indicate the parameters of the backscatter signal sent by the BSC device; the first target information is determined based on the second target information; the first device includes any one of the following: the BSC device, or other UEs.

[0120] In this embodiment, the first target information is determined by the communication device based on the second target information. It can be understood that the content indicated by the second target information is a subset or the entirety of the content indicated by the first target information.

[0121] Alternatively, in this embodiment of the application, when the communication device establishes a connection with the first device, the communication device can receive second target information from the first device.

[0122] In the case where the first device includes other UEs, the parameters for the backscatter signal sent by the BSC device are: those reported by the BSC device to other UEs before it sends the signal.

[0123] Alternatively, in this embodiment of the application, the communication device may specifically be a base station.

[0124] In this embodiment of the application, since the backscatter signal sent by the BSC device may affect the performance of the UE in performing channel estimation, the communication device can receive the parameters of the backscatter signal sent by the BSC device (or other UE).

[0125] Thus, since the communication device can directly receive the parameters of the backscattered signal sent by the BSC device (or other UE), the communication device can accurately determine the parameters of the backscattered signal, or accurately determine whether the UE should perform joint channel estimation on the first signal. This allows the UE to accurately determine whether to perform joint channel estimation on the first signal, thereby avoiding affecting the performance of the UE in performing channel estimation.

[0126] Optionally, in the embodiments of this application, before step 201 above, the channel estimation method provided in the embodiments of this application may further include the following step 301.

[0127] Step 301: The communication device sends a fifth request message to the first device.

[0128] In this embodiment of the application, the fifth request message is used to request parameters for the BSC device to send backscatter signals.

[0129] Alternatively, in this embodiment of the application, when the communication device establishes a connection with the first device, the communication device may send a fifth request message to the first device.

[0130] Therefore, since the communication device can directly request the parameters of the backscatter signal sent by the BSC device from the first device, it can avoid the situation where the BSC device (or other UE) cannot send the parameters to the communication device due to network quality problems. Thus, it can avoid the situation where the communication device cannot obtain the parameters.

[0131] Step 103: The UE determines whether to perform joint channel estimation on the first signal based on the first target information.

[0132] Optionally, in this embodiment of the application, after the UE determines whether to perform joint channel estimation on the first signal, if the UE determines to perform joint channel estimation on the first signal, the UE can also determine the method of joint channel estimation based on the first target information, so as to perform joint channel estimation on the first signal in this manner.

[0133] It should be noted that the joint channel estimation in the embodiments of this application (including all embodiments) mainly refers to interpolation in channel estimation, including time-domain interpolation. For example, by estimating the channel response or channel state information on reference signal resource elements (REs) at two different times, the channel response or channel state information on other REs at those two times or on REs at other times can be obtained.

[0134] For a description of joint channel estimation, please refer to the specific descriptions in related technologies; the embodiments in this application will not be repeated here.

[0135] The following will illustrate this with two different examples.

[0136] Example 1: The first target information is used to indicate the parameters of the backscatter signal sent by the BSC device.

[0137] Optionally, in this embodiment of the application, the first target information mentioned above includes the target duration. Specifically, step 103 can be implemented through step 103a as described below.

[0138] Step 103a: When the target time-frequency resources for the BSC device to send backscattered signals overlap with the time-frequency resources of the first signal, the UE determines to perform joint channel estimation within the target duration.

[0139] In this embodiment of the application, the target time-frequency resource is determined based on the first target information.

[0140] Optionally, in this embodiment, the target time-frequency resource may include a first time-domain resource and a first frequency-domain resource. The first time-domain resource is used to indicate the possible time period during which the BSC device transmits the backscatter signal.

[0141] It should be noted that the above-mentioned "overlap of target time-frequency resources and time-frequency resources of the first signal" can be understood as: complete overlap or partial overlap, and the embodiments of this application do not limit this.

[0142] It is understandable that when the possible time period for the BSC device to send backscattered signals overlaps with the time domain resources of the first signal, and the first frequency domain resources for the BSC device to send backscattered signals overlap with the frequency domain resources of the first signal, the UE determines to perform joint channel estimation.

[0143] In this embodiment of the application, if the target time-frequency resources of the backscattered signal transmitted by the BSC device overlap with the time-frequency resources of the first signal, it can be considered that when performing joint channel estimation on the first signal, there may be a problem of discontinuous signal amplitude. Therefore, the UE will perform joint channel estimation within the minimum time when the amplitude and phase of the backscattered signal remain unchanged, so as to avoid the joint channel estimation being affected by the backscattered signal, thereby avoiding the problem of discontinuous signal amplitude.

[0144] Thus, it can be seen that, since the target time-frequency resources for the BSC device to send backscattered signals overlap with the time-frequency resources of the first signal, the UE can perform joint channel estimation within the target duration, thereby avoiding the problem of signal amplitude discontinuity and thus avoiding affecting the performance of channel estimation.

[0145] Optionally, in the embodiments of this application, the above step 103a can be specifically implemented by the following step 103a1.

[0146] Step 103a1: When the target time-frequency resources for the BSC device to transmit the backscatter signal overlap with the time-frequency resources of the first signal, and when the target duration is greater than or equal to the length of N time units of the first signal, the UE determines to perform joint channel estimation within N time units within the target duration.

[0147] In the embodiments of this application, N is a positive integer.

[0148] Alternatively, in the embodiments of this application, N can specifically be 1.

[0149] Further, optionally, in the embodiments of this application, the aforementioned time unit may specifically be a time slot or a subframe.

[0150] In this embodiment of the application, if the target duration is greater than or equal to the length of N time units of the first signal, it can be considered that the amplitude and phase of the backscattered signal are unchanged within the length of N time units. That is, the joint channel estimation of the first signal within N time units is not affected by the backscattered signal. Therefore, the UE can perform joint channel estimation within N time units.

[0151] It is understandable that the UE can determine the method for joint channel estimation based on the target duration and the length of the time unit of the first signal.

[0152] Optionally, in the embodiments of this application, step 103a1 above can also be replaced by step 103a2 below.

[0153] Step 103a2: When the target time-frequency resources for the backscattered signal transmitted by the BSC device overlap with the time-frequency resources of the first signal, and when the target duration is less than the length of N time units of the first signal, the UE determines that joint channel estimation within N time units will not be performed within the target duration.

[0154] Further optionally, in the embodiments of this application, when the target duration is less than the length of N time units of the first signal and greater than or equal to the length of X time units of the first signal, the UE can determine to perform joint channel estimation within X time units within the target duration, where X is a positive integer less than N.

[0155] In this embodiment of the application, if the target duration is less than the length of N time units of the first signal, it can be considered that the amplitude and phase of the backscattered signal may change within the length of N time units. That is, the joint channel estimation of the first signal within N time units may be affected by the backscattered signal. Therefore, the UE may not perform joint channel estimation within N time units.

[0156] Optionally, in this embodiment of the application, if the target time-frequency resources for the backscattered signal transmitted by the BSC device do not overlap with the time-frequency resources of the first signal, the UE determines to perform joint channel estimation on the first signal.

[0157] In this embodiment of the application, if the target time-frequency resources of the backscattered signal sent by the BSC device do not overlap with the time-frequency resources of the first signal, it can be considered that the backscattered signal will not affect the performance of the joint channel estimation of the first signal. Therefore, the UE can directly perform joint channel estimation on the first signal.

[0158] Example 2: The first target information is used to indicate whether joint channel estimation should be performed on the first signal.

[0159] Optionally, in the embodiments of this application, step 103 can be implemented by step 103b, step 103c, step 103d, step 103e, or step 103f.

[0160] Step 103b: If the first target information includes the first indication information, the UE determines not to perform joint channel estimation for the first signal within M time units.

[0161] Step 103c: If the first target information includes the second indication information, the UE determines to perform joint channel estimation for the first signal within M time units.

[0162] Step 103d: If the first target information includes the third indication information, the UE determines not to perform joint channel estimation of T symbols for the first signal.

[0163] Step 103e: If the first target information includes the fourth indication information, the UE determines to perform a joint channel estimation of T symbols for the first signal.

[0164] Step 103f: If the first target information includes the fifth indication information, the UE determines to perform joint channel estimation for the first signal within R time units.

[0165] It is understood that the UE can perform joint channel estimation by indicating the first target information for the first signal, or by not indicating the first target information for the first signal.

[0166] The channel estimation method provided in this application allows the UE to receive first target information from a communication device, which instructs the BSC device to send a backscattered signal (or whether to perform joint channel estimation on a first signal). This backscattered signal is obtained by the BSC device modulating the first signal. Therefore, the UE can determine whether to perform joint channel estimation on the first signal based on this first target information. Since the UE can determine whether to perform joint channel estimation on the first signal based on the parameters (or whether to perform joint channel estimation on the first signal) of the backscattered signal sent by the BSC device as instructed by the communication device, rather than directly performing joint channel estimation on the first signal, the joint channel estimation performed by the UE on the first signal can be avoided from being affected by the backscattered signal associated with the first signal. This avoids impacting the channel estimation performance and improves the UE's performance in demodulating radio frequency signals.

[0167] In this embodiment of the application, the UE can receive the first target information from the communication device under various different circumstances, as follows:

[0168] Scenario 1

[0169] The UE can directly receive the first target information from the communication device when a connection is established with the communication device.

[0170] Scenario 2

[0171] The UE can send a request to the communication device so that the communication device can send first target information to the UE. The following example illustrates this using the parameters of the first target information that instruct the BSC device to send a backscatter signal:

[0172] Optionally, in the embodiments of this application, combined with Figure 6 ,like Figure 8 As shown, prior to step 101 above, the channel estimation method provided in this application embodiment may further include steps 401 and 402 as described below.

[0173] Step 401: The UE sends a first request message to the communication device.

[0174] Step 402: The communication device receives the first request message from the UE.

[0175] In this embodiment of the application, the first request message is used to request parameters for the BSC device to send a backscatter signal.

[0176] It is understandable that the communication device can directly send the first target information to the UE based on the first request message.

[0177] Optionally, in the embodiments of this application, before step 401 above, the channel estimation method provided in the embodiments of this application may further include the following step 501.

[0178] Step 501: If the UE determines that the received signal is associated with a backscattered signal, the UE sends a first request message to the communication device.

[0179] Optionally, in this embodiment, the UE can detect the received signal to determine whether the amplitude of the signal exhibits periodic discontinuities (e.g., periodic jumps) in different time units (e.g., different time slots), thereby determining whether the signal is associated with a backscattered signal. If the amplitude of the signal exhibits periodic discontinuities (e.g., periodic jumps) in different time units (e.g., different time slots), it can be determined that the signal is associated with a backscattered signal, i.e., the BSC device modulates its own information onto the signal.

[0180] In this embodiment of the application, if the UE determines that the received signal is associated with a backscattered signal, it can be considered that the joint channel estimation performed on the first signal may be affected by the backscattered signal associated with the first signal, thereby affecting the performance of the UE in performing channel estimation. Therefore, the UE can request the BSC device to send parameters of the backscattered signal to the communication device.

[0181] It should be noted that, for the case where the first target information is used to indicate whether to perform joint channel estimation on the first signal, the description in the above embodiments can be referred to, and the embodiments of this application will not be repeated here.

[0182] Scenario 3

[0183] The UE can detect whether it meets preset conditions (e.g., whether the signal received by the UE is associated with a backscatter signal) based on a request from the communication device. If it is determined that the signal received by the UE is associated with a backscatter signal, the UE can send a request to the communication device so that the communication device can send first target information to the UE. The following example uses the parameters of the first target information used to instruct the BSC device to send a backscatter signal to illustrate this:

[0184] Optionally, in the embodiments of this application, combined with Figure 6 ,like Figure 9 As shown, before step 101 above, the channel estimation method provided in this application embodiment may further include steps 601 to 603 below, and step 101 above can be specifically implemented by step 101a below.

[0185] Step 601: The communication device sends a second request message to the UE.

[0186] Step 602: The UE receives a second request message from the communication device.

[0187] In this embodiment of the application, the second request message is used to request the UE to determine whether the received signal is associated with a backscatter signal.

[0188] It should be noted that the explanation of whether the UE determines whether the received signal is associated with the backscattered signal can be found in the specific description in the above embodiments, and will not be repeated here in the embodiments of this application.

[0189] Optionally, in this embodiment of the application, the second request message includes at least one of the following:

[0190] A third request message is used to request: the UE to determine whether the signal received on a target resource is associated with a backscattered signal, the target resource including at least one of the following: a target time domain resource and a target frequency domain resource;

[0191] The fourth request message requests the UE to determine whether it has received target sequence information associated with the identifier of the BSC device or with the scrambling sequence of the backscattered signal.

[0192] Further optionally, in this embodiment of the application, the identifier of the BSC device can specifically be: the device digital identifier (Identity Document, ID) of the BSC device.

[0193] Step 603: If the UE determines that the received signal is associated with a backscattered signal, the UE sends a first feedback message to the communication device.

[0194] In this embodiment of the application, the first feedback message is used to indicate that the signal received by the UE is associated with a backscattered signal.

[0195] In this embodiment of the application, the aforementioned first target information is sent by the communication device upon receiving the first feedback message.

[0196] Step 101a: When the communication device receives the first feedback message from the UE, it sends the first target information to the UE.

[0197] It should be noted that, for the case where the first target information is used to indicate whether to perform joint channel estimation on the first signal, the description in the above embodiments can be referred to, and the embodiments of this application will not be repeated here.

[0198] Thus, since the UE can determine whether the signal received by the UE is associated with the backscatter signal according to the request of the communication device, the communication device will send the first target information to the UE only when the UE determines that the received signal is associated with the backscatter signal, so that the UE can determine whether to perform joint channel estimation. Therefore, the power consumption of the UE can be reduced.

[0199] The channel estimation method provided in this application can be executed by a UE (or communication device). This application uses the execution of the channel estimation method by a UE (or communication device) as an example to illustrate the channel estimation method provided in this application.

[0200] Figure 10 A schematic diagram of a possible structure of a channel estimation device involved in an embodiment of this application is shown. This channel estimation device is a first channel estimation device. Figure 10 As shown, the first channel estimation device 60 may include a receiving module 61 and a determining module 62.

[0201] The receiving module 61 is configured to receive first target information from the second channel estimation device. This first target information indicates the parameters of the backscattered signal transmitted by the BSC device, or whether joint channel estimation should be performed on the first signal. The determining module 62 is configured to determine, based on the first target information received by the receiving module 61, whether joint channel estimation should be performed on the first signal. The backscattered signal is obtained by the BSC device modulating the first signal.

[0202] In one possible implementation, the aforementioned first target information is used to indicate: parameters for the BSC device to transmit a backscatter signal; the parameters for the BSC device to transmit a backscatter signal include at least one of the following: target time information, which indicates: the time information for the BSC device to transmit the backscatter signal; at least one cycle length of the backscatter signal; the symbol length of the backscatter signal; the transmission duration of the backscatter signal; the modulation method of the backscatter signal; the encoding method of the backscatter signal; the length of the delimiter of the backscatter signal; the time offset of the delimiter; the length of the preamble of the backscatter signal; the time offset of the preamble; synchronization-related information of the BSC device; related information for the BSC device to frequency shift the first signal; and the target duration. Wherein, the delimiter indicates: the start time of the backscatter signal; and the target duration is: the minimum duration during which the amplitude and phase of the backscatter signal remain unchanged.

[0203] In one possible implementation, the target time information includes any one of the following: first time information, which includes at least one of aperiodic transmission mode information and aperiodic transmission time information; and second time information, which includes at least one of periodic transmission mode information, transmission period, and periodic transmission time information.

[0204] In one possible implementation, the synchronization-related information of the BSC device includes at least one of the following: the start time of the symbol or time slot of the backscattered signal; the deviation information between the timing of the BSC device and the target timing, wherein the target timing includes any one of the following: the timing of the first signal, the timing of the second channel estimation device.

[0205] In one possible implementation, the relevant information for the BSC device to shift the first signal includes at least one of the following: whether frequency shifting is supported; the center frequency after frequency shifting; and the bandwidth after frequency shifting.

[0206] In one possible implementation, the first target information includes a target duration; the determining module 62 is specifically used to determine, when the target time-frequency resources for the backscattered signal transmitted by the BSC device overlap with the time-frequency resources of the first signal, to perform joint channel estimation within the target duration. The target time-frequency resources are determined based on the first target information.

[0207] In one possible implementation, the determining module 62 is specifically configured to determine, when the target duration is greater than or equal to the length of N time units of the first signal, to perform joint channel estimation within N time units within the target duration. The determining module 62 is also configured to determine, when the target duration is less than the length of N time units of the first signal, not to perform joint channel estimation within N time units within the target duration. Here, N is a positive integer.

[0208] In one possible implementation, the first target information is used to indicate whether to perform joint channel estimation on the first signal. The first target information includes at least one of the following: a first indication, indicating that the first channel estimation device 60 does not perform joint channel estimation on the first signal over M time units; a second indication, indicating that the first channel estimation device 60 performs joint channel estimation on the first signal over M time units; a third indication, indicating that the first channel estimation device 60 does not perform joint channel estimation on the first signal over T symbols; a fourth indication, indicating that the first channel estimation device 60 performs joint channel estimation on the first signal over T symbols; and a fifth indication, indicating that the first channel estimation device 60 performs joint channel estimation on the first signal over R time units. Wherein, the T symbols are symbols within the same time unit, M and T are both positive integers greater than 1, and R is a decimal greater than 0 and less than 1.

[0209] In one possible implementation, the determining module 62 is specifically configured to: determine, when the first target information includes first indication information, not to perform joint channel estimation of the first signal within M time units; or, when the first target information includes second indication information, to perform joint channel estimation of the first signal within M time units; or, when the first target information includes third indication information, to determine not to perform joint channel estimation of the first signal within T symbols; or, when the first target information includes fourth indication information, to determine to perform joint channel estimation of the first signal within T symbols; or, when the first target information includes fifth indication information, to determine to perform joint channel estimation of the first signal within R time units.

[0210] In one possible implementation, the second channel estimation device mentioned above includes any one of the following: a base station, a BSC device, or other channel estimation devices.

[0211] In one possible implementation, the first target information is determined by the second channel estimation device based on the second target information. The second target information is used to indicate parameters for the backscattered signal transmitted by the BSC device; the second target information is transmitted by a first device to the second channel estimation device, and the first device includes any one of the following: a BSC device, or another channel estimation device.

[0212] In one possible implementation, the first channel estimation device further includes a transmitting module. The transmitting module is configured to send a first request message to the second channel estimation device, the first request message requesting parameters of the backscattered signal from the BSC device.

[0213] In one possible implementation, the aforementioned sending module is specifically used to send a first request message to the second channel estimation device when the first channel estimation device 60 determines that the received signal is associated with a backscattered signal.

[0214] In one possible implementation, the receiving module 61 is further configured to receive a second request message from the second channel estimation device, the second request message requesting: the first channel estimation device 60 to determine whether the received signal is associated with a backscattered signal; and if the first channel estimation device 60 determines that the received signal is associated with a backscattered signal, to send a first feedback message to the second channel estimation device, the first feedback message indicating that the signal received by the first channel estimation device 60 is associated with a backscattered signal. The aforementioned first target information is sent by the second channel estimation device upon receiving the first feedback message.

[0215] In one possible implementation, the second request message includes at least one of the following: a third request message, which requests that the first channel estimation device 60 determine whether a signal received on a target resource is associated with a backscattered signal, the target resource including at least one of the following: a target time-domain resource and a target frequency-domain resource; and a fourth request message, which requests that the first channel estimation device 60 determine whether target sequence information is received, the target sequence information being associated with an identifier of a BSC device or with a scrambling sequence of a backscattered signal.

[0216] The channel estimation apparatus provided in this application embodiment is a first channel estimation apparatus. Since the first channel estimation apparatus can determine whether to perform joint channel estimation on the first signal based on the parameters of the backscattered signal sent by the BSC device as instructed by the second channel estimation apparatus (or whether to perform joint channel estimation on the first signal), instead of directly performing joint channel estimation on the first signal, the joint channel estimation performed by the first channel estimation apparatus on the first signal can be avoided from being affected by the backscattered signal associated with the first signal, thereby avoiding affecting the performance of channel estimation. In this way, the performance of the first channel estimation apparatus in demodulating radio frequency signals can be improved.

[0217] The first channel estimation device in this application embodiment can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or other devices besides a terminal. For example, the terminal can include, but is not limited to, the type of terminal 11 listed above; other devices can be servers, network attached storage (NAS), etc., and this application embodiment does not specifically limit the type.

[0218] The first channel estimation device provided in this application embodiment can achieve... Figures 6 to 9 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0219] Figure 11 A schematic diagram of a possible structure of a channel estimation device involved in an embodiment of this application is shown. This channel estimation device is a second channel estimation device. Figure 11 As shown, the first channel estimation device 70 may include a transmission module 71.

[0220] The transmitting module 71 is used to transmit first target information to the first channel estimation device. This first target information indicates the parameters of the backscattered signal transmitted by the BSC device, or whether to perform joint channel estimation on the first signal. The backscattered signal is obtained by the BSC device modulating the first signal. The first target information is used by the first channel estimation device to determine whether to perform joint channel estimation on the first signal.

[0221] In one possible implementation, the second channel estimation device 70 further includes a receiving module. The receiving module is configured to receive second target information from the first device. The second target information indicates parameters for the backscattered signal transmitted by the BSC device; the first target information is determined based on the second target information; the first device includes any one of the following: a BSC device, or another channel estimation device.

[0222] In one possible implementation, the sending module 71 is further configured to send a fifth request message to the first device, the fifth request message being used to request parameters for the BSC device to send the backscatter signal.

[0223] In one possible implementation, the sending module 71 is further configured to send a second request message to the first channel estimation device, the second request message requesting the first channel estimation device to determine whether the received signal is associated with a backscattered signal. Specifically, the sending module 71 is configured to send first target information to the first channel estimation device when the second channel estimation device 70 receives a first feedback message from the first channel estimation device. The first feedback message indicates that the signal received by the first channel estimation device is associated with a backscattered signal.

[0224] The channel estimation device provided in this application embodiment is a second channel estimation device. Since the first channel estimation device can determine whether to perform joint channel estimation on the first signal based on the parameters of the backscattered signal sent by the BSC device as instructed by the second channel estimation device (or whether to perform joint channel estimation on the first signal), instead of directly performing joint channel estimation on the first signal, the joint channel estimation performed by the first channel estimation device on the first signal can be avoided from being affected by the backscattered signal associated with the first signal, thereby avoiding affecting the performance of channel estimation. In this way, the performance of the first channel estimation device in demodulating radio frequency signals can be improved.

[0225] The second channel estimation device in this application embodiment can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or other devices besides a terminal. Exemplarily, the terminal can include, but is not limited to, the type of terminal 11 listed above; other devices can be servers, network attached storage (NAS), etc., and this application embodiment does not specifically limit the specific devices.

[0226] The second channel estimation device provided in this application embodiment can achieve... Figures 6 to 9 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0227] Optionally, in the embodiments of this application, such as Figure 12As shown in the illustration, this application also provides a communication device 80, including a processor 81 and a memory 82. The memory 82 stores programs or instructions that can run on the processor 81. For example, when the communication device 80 is a terminal, the program or instructions executed by the processor 81 implement the various steps of the above-described channel estimation method embodiments and achieve the same technical effect. When the communication device 80 is a network-side device, the program or instructions executed by the processor 81 implement the various steps of the above-described channel estimation method embodiments and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0228] This application embodiment also provides a terminal, including a processor and a communication interface. The communication interface is used to receive first target information from a communication device. The first target information is used to indicate: parameters of a backscattered signal sent by a BSC device, or whether to perform joint channel estimation on a first signal. The processor is used to determine whether to perform joint channel estimation on the first signal based on the first target information. The backscattered signal is obtained by the BSC device modulating the first signal. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 13 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0229] The terminal 100 includes, but is not limited to, at least some of the following components: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, and processor 110.

[0230] Those skilled in the art will understand that the terminal 100 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 110 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 13 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0231] It should be understood that, in this embodiment, the input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042. The GPU 1041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 107 includes at least one of a touch panel 1071 and other input devices 1072. The touch panel 1071 is also called a touch screen. The touch panel 1071 may include a touch detection device and a touch controller. Other input devices 1072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0232] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 101 can transmit it to the processor 110 for processing; in addition, the radio frequency unit 101 can send uplink data to the network-side device. Typically, the radio frequency unit 101 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0233] The memory 109 can be used to store software programs or instructions, as well as various data. The memory 109 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 109 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 109 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0234] Processor 110 may include one or more processing units; optionally, processor 110 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 110.

[0235] The radio frequency unit 101 is used to receive first target information from the communication device. The first target information is used to indicate the parameters of the backscatter signal sent by the BSC device, or whether to perform joint channel estimation on the first signal.

[0236] The processor 110 is configured to determine, based on the first target information, whether to perform joint channel estimation on the first signal.

[0237] The backscattered signal mentioned above is obtained by the BSC device modulating the first signal.

[0238] The terminal provided in this application embodiment can determine whether to perform joint channel estimation on the first signal based on the parameters of the backscattered signal sent by the BSC device indicated by the communication device (or whether to perform joint channel estimation on the first signal), instead of directly performing joint channel estimation on the first signal. Therefore, the joint channel estimation performed by the terminal on the first signal can be avoided from being affected by the backscattered signal associated with the first signal, thereby avoiding affecting the performance of channel estimation. In this way, the performance of the terminal in demodulating radio frequency signals can be improved.

[0239] Optionally, in this embodiment of the application, the first target information mentioned above includes: target duration.

[0240] The processor 110 is specifically configured to determine, when the target time-frequency resources for the backscattered signal transmitted by the BSC device overlap with the time-frequency resources of the first signal, to perform joint channel estimation within the target duration.

[0241] The aforementioned target time-frequency resources are determined based on the first target information.

[0242] Thus, it can be seen that, since the target time-frequency resources of the backscattered signal transmitted by the BSC device overlap with the time-frequency resources of the first signal, the terminal can perform joint channel estimation within the target duration, thereby avoiding the problem of signal amplitude discontinuity and thus avoiding affecting the performance of channel estimation.

[0243] Optionally, in this embodiment of the application, the processor 110 is specifically configured to determine to perform joint channel estimation within N time units within the target duration when the target duration is greater than or equal to the length of N time units of the first signal.

[0244] The processor 110 is also configured to determine, when the target duration is less than the length of N time units of the first signal, not to perform joint channel estimation within the N time units within the target duration.

[0245] Where N is a positive integer.

[0246] Optionally, in this embodiment of the application, the processor 110 is specifically configured to: determine, when the first target information includes first indication information, not to perform joint channel estimation of the first signal within M time units; or, when the first target information includes second indication information, determine to perform joint channel estimation of the first signal within M time units; or, when the first target information includes third indication information, determine not to perform joint channel estimation of the first signal within T symbols; or, when the first target information includes fourth indication information, determine to perform joint channel estimation of the first signal within T symbols; or, when the first target information includes fifth indication information, determine to perform joint channel estimation of the first signal within R time units.

[0247] Optionally, in this embodiment of the application, the radio frequency unit 101 is further configured to send a first request message to the communication device, the first request message being used to request parameters for the BSC device to send backscattered signals.

[0248] Optionally, in this embodiment of the application, the radio frequency unit 101 is specifically used to send a first request message to the communication device when the terminal determines that the received signal is associated with a backscattered signal.

[0249] Optionally, in this embodiment of the application, the radio frequency unit 101 is further configured to receive a second request message from the communication device, the second request message being configured to request: the terminal to determine whether the received signal is associated with a backscatter signal; and if the terminal determines that the received signal is associated with a backscatter signal, to send a first feedback message to the communication device, the first feedback message being configured to indicate that the signal received by the terminal is associated with a backscatter signal.

[0250] The aforementioned first target information is sent by the communication device upon receiving the first feedback message.

[0251] This application embodiment also provides a network-side device, including a processor and a communication interface. The communication interface is used to send first target information to a terminal. The first target information indicates parameters for a backscattered signal sent by the BSC device, or whether joint channel estimation is performed on a first signal. The backscattered signal is obtained by the BSC device modulating the first signal. The first target information is used by the terminal to determine whether to perform joint channel estimation on the first signal. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above method embodiments can be applied to this network-side device embodiment and achieve the same technical effects.

[0252] Specifically, embodiments of this application also provide a network-side device. For example... Figure 14As shown, the network-side device 200 includes: an antenna 201, a radio frequency (RF) device 202, a baseband device 203, a processor 204, and a memory 205. The antenna 201 is connected to the RF device 202. In the uplink direction, the RF device 202 receives information through the antenna 201 and transmits the received information to the baseband device 203 for processing. In the downlink direction, the baseband device 203 processes the information to be transmitted and sends it to the RF device 202. The RF device 202 processes the received information and transmits it through the antenna 201.

[0253] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 203, which includes a baseband processor.

[0254] The baseband device 203 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 14 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 205 via a bus interface to call the program in the memory 205 and execute the network device operation shown in the above method embodiment.

[0255] The network-side device may also include a network interface 206, such as a common public radio interface (CPRI).

[0256] Specifically, the network-side device 200 of this embodiment further includes: instructions or programs stored in memory 205 and executable on processor 204, wherein processor 204 calls the instructions or programs in memory 205 to execute. Figure 11 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0257] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described channel estimation method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0258] The processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0259] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described channel estimation method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0260] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0261] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described channel estimation method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0262] This application also provides a channel estimation system, including: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the channel estimation method described above, and the network-side device can be used to perform the steps of the channel estimation method described above.

[0263] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0264] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0265] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A channel estimation method, characterized in that, The method includes: The user equipment (UE) receives first target information from the communication device, the first target information being used to indicate: parameters for the backscatter signal sent by the backscatter communication BSC device; The UE determines whether to perform joint channel estimation on the first signal based on the first target information, wherein the first signal is sent to the UE by the communication device; The backscattered signal is obtained by modulating the first signal using the BSC device.

2. The method according to claim 1, characterized in that, The first target information is used to indicate the parameters by which the BSC device sends the backscatter signal; The parameters for the backscatter signal transmitted by the BSC device include at least one of the following: The BSC device transmits the target time information of the backscattered signal; At least one period length of the backscattered signal; The symbol length of the backscattered signal; The transmission duration of the backscattered signal; The modulation method of the backscattered signal; The encoding method of the backscattered signal; The length of the delimiter of the backscattered signal; The time offset of the delimiter; The length of the preamble of the backscattered signal; The time offset of the preamble; Information related to the synchronization of the BSC device; The BSC device performs frequency shifting on the first signal; Target duration; The delimiter is used to indicate the start time of the backscattered signal; The target duration is the minimum duration during which the amplitude and phase of the backscattered signal remain unchanged.

3. The method according to claim 2, characterized in that, The target time information includes any of the following: First time information, which includes at least one of: aperiodic transmission mode information and aperiodic transmission time information; The second time information includes at least one of the following: periodic transmission mode information, transmission period, and periodic transmission time information.

4. The method according to claim 2, characterized in that, The synchronization-related information of the BSC device includes at least one of the following: The symbol of the backscattered signal or the start time of the time slot; The deviation information between the timing of the BSC device and the target timing, wherein the target timing includes any one of the following: the timing of the first signal, or the timing of the communication device.

5. The method according to claim 2, characterized in that, The relevant information regarding the frequency shifting of the first signal by the BSC device includes at least one of the following: Does it support frequency shifting? The center frequency after the frequency point is moved; Bandwidth after frequency relocation.

6. The method according to any one of claims 2 to 5, characterized in that, The first target information includes: the target duration; The UE determines whether to perform joint channel estimation on the first signal based on the first target information, including: If the target time-frequency resources for the BSC device to transmit the backscattered signal overlap with the time-frequency resources of the first signal, the UE determines to perform the joint channel estimation within the target duration. The target time-frequency resource is determined based on the first target information.

7. The method according to claim 6, characterized in that, The UE determines to perform the joint channel estimation within the target duration, including: If the target duration is greater than or equal to the length of N time units of the first signal, the UE determines to perform the joint channel estimation within the N time units within the target duration; The method further includes: If the target duration is less than the length of N time units of the first signal, the UE determines not to perform the joint channel estimation within the N time units during the target duration; Where N is a positive integer.

8. The method according to claim 1, characterized in that, The communication equipment includes any one of the following: a base station, the BSC device, or other UEs.

9. The method according to claim 8, characterized in that, The first target information is determined by the communication device based on the second target information; Wherein, the second target information is used to indicate: the parameters of the backscatter signal sent by the BSC device; the second target information is: sent by the first device to the communication device, wherein the first device includes any one of the following: the BSC device, the other UE.

10. The method according to claim 1, characterized in that, Before the UE receives the first target information from the communication device, the method further includes: The UE sends a first request message to the communication device, the first request message being used to request: the BSC device to send parameters of the backscatter signal.

11. The method according to claim 10, characterized in that, The UE sends a first request message to the communication device, including: If the UE determines that the received signal is associated with the backscattered signal, the UE sends the first request message to the communication device.

12. The method according to claim 1, characterized in that, Before the UE receives the first target information from the communication device, the method further includes: The UE receives a second request message from the communication device, the second request message being used to request: the UE to determine whether the received signal is associated with the backscatter signal; If the UE determines that the received signal is the backscattered signal, the UE sends a first feedback message to the communication device, the first feedback message indicating that the signal received by the UE is associated with the backscattered signal; The first target information is sent by the communication device upon receiving the first feedback message.

13. The method according to claim 12, characterized in that, The second request message includes at least one of the following: A third request message is used to request that the UE determine whether the signal received on the target resource is associated with the backscattered signal, wherein the target resource includes at least one of the following: a target time-domain resource and a target frequency-domain resource; The fourth request message is used to request that the UE determine whether it has received target sequence information, which is associated with the identifier of the BSC device or with the scrambling sequence of the backscatter signal.

14. A channel estimation method, characterized in that, The method includes: The communication device sends first target information to the UE, the first target information being used to indicate: parameters for the BSC device to send backscattered signals; The backscattered signal is obtained by the BSC device modulating a first signal, which is sent to the UE by the communication device. The first target information is used by the UE to determine whether to perform joint channel estimation on the first signal.

15. The method according to claim 14, characterized in that, Before the communication device sends the first target information to the UE, the method further includes: The communication device receives second target information from the first device; The second target information is used to indicate the parameters of the backscatter signal sent by the BSC device; the first target information is determined based on the second target information. The first device includes any one of the following: the BSC device, or other UEs.

16. The method according to claim 15, characterized in that, Before the communication device receives the second target information from the first device, the method further includes: The communication device sends a fifth request message to the first device, the fifth request message being used to request: the BSC device to send parameters of the backscatter signal.

17. The method according to claim 14, characterized in that, Before the communication device sends the first target information to the UE, the method further includes: The communication device sends a second request message to the UE, the second request message being used to request: the UE to determine whether the received signal is associated with the backscatter signal; The communication device sends first target information to the UE, including: When the communication device receives a first feedback message from the UE, it sends the first target information to the UE. The first feedback message is used to indicate that the signal received by the UE is associated with the backscatter signal.

18. A channel estimation device, characterized in that, The channel estimation device is a first channel estimation device, which includes: a receiving module and a determining module; The receiving module is used to receive first target information from the second channel estimation device, the first target information being used to indicate the parameters of the backscatter signal sent by the backscatter communication BSC device; The determining module is used to determine whether to perform joint channel estimation on the first signal based on the first target information received by the receiving module, wherein the first signal is sent by the second channel estimation device to the first channel estimation device; The backscattered signal is obtained by modulating the first signal using the BSC device.

19. The channel estimation apparatus according to claim 18, characterized in that, The first target information is used to indicate the parameters by which the BSC device sends the backscatter signal; The parameters for the backscatter signal transmitted by the BSC device include at least one of the following: The BSC device transmits the target time information of the backscattered signal; At least one period length of the backscattered signal; The symbol length of the backscattered signal; The transmission duration of the backscattered signal; The modulation method of the backscattered signal; The encoding method of the backscattered signal; The length of the delimiter of the backscattered signal; The time offset of the delimiter; The length of the preamble of the backscattered signal; The time offset of the preamble; Information related to the synchronization of the BSC device; The BSC device performs frequency shifting on the first signal; Target duration; The delimiter is used to indicate the start time of the backscattered signal; The target duration is the minimum duration during which the amplitude and phase of the backscattered signal remain unchanged.

20. The channel estimation apparatus according to claim 19, characterized in that, The target time information includes any of the following: First time information, which includes at least one of: aperiodic transmission mode information and aperiodic transmission time information; The second time information includes at least one of the following: periodic transmission mode information, transmission period, and periodic transmission time information.

21. The channel estimation apparatus according to claim 19, characterized in that, The synchronization-related information of the BSC device includes at least one of the following: The symbol of the backscattered signal or the start time of the time slot; The deviation information between the timing of the BSC device and the target timing, wherein the target timing includes any one of the following: the timing of the first signal, or the timing of the second channel estimation device.

22. The channel estimation apparatus according to claim 19, characterized in that, The relevant information regarding the frequency shifting of the first signal by the BSC device includes at least one of the following: Does it support frequency shifting? The center frequency after the frequency point is moved; Bandwidth after frequency relocation.

23. The channel estimation apparatus according to any one of claims 19 to 22, characterized in that, The first target information includes: the target duration; The determining module is specifically used to determine, when the target time-frequency resources for the BSC device to transmit the backscattered signal overlap with the time-frequency resources of the first signal, to perform the joint channel estimation within the target duration. The target time-frequency resource is determined based on the first target information.

24. The channel estimation apparatus according to claim 23, characterized in that, The determining module is specifically used to determine, when the target duration is greater than or equal to the length of N time units of the first signal, to perform the joint channel estimation within the N time units within the target duration; The determining module is further configured to determine, when the target duration is less than the length of N time units of the first signal, not to perform the joint channel estimation within the N time units within the target duration; Where N is a positive integer.

25. The channel estimation apparatus according to claim 18, characterized in that, The second channel estimation device includes any one of the following: a base station, the BSC device, or other channel estimation devices.

26. The channel estimation apparatus according to claim 25, characterized in that, The first target information is determined by the second channel estimation device based on the second target information; Wherein, the second target information is used to indicate: the parameters of the backscatter signal sent by the BSC device; the second target information is: sent by the first device to the second channel estimation device, wherein the first device includes any one of the following: the BSC device, the other channel estimation device.

27. The channel estimation apparatus according to claim 18, characterized in that, The first channel estimation device further includes: a transmission module; The sending module is configured to send a first request message to the second channel estimation device, the first request message being used to request the BSC device to send parameters of the backscatter signal.

28. The channel estimation apparatus according to claim 27, characterized in that, The sending module is specifically used to send the first request message to the second channel estimation device when the first channel estimation device determines that the received signal is associated with the backscattered signal.

29. The channel estimation apparatus according to claim 18, characterized in that, The receiving module is further configured to receive a second request message from the second channel estimation device, the second request message being configured to request: the first channel estimation device to determine whether the received signal is associated with the backscattered signal; and if the first channel estimation device determines that the received signal is associated with the backscattered signal, to send a first feedback message to the second channel estimation device, the first feedback message being configured to indicate that: the signal received by the first channel estimation device is associated with the backscattered signal; The first target information is sent by the second channel estimation device upon receiving the first feedback message.

30. The channel estimation apparatus according to claim 29, characterized in that, The second request message includes at least one of the following: A third request message is used to request that the first channel estimation device determine whether the signal received on the target resource is associated with the backscattered signal, wherein the target resource includes at least one of the following: a target time-domain resource and a target frequency-domain resource; A fourth request message is used to request that the first channel estimation device determine whether it has received target sequence information, which is associated with the identifier of the BSC device or with the scrambling sequence of the backscattered signal.

31. A channel estimation device, characterized in that, The channel estimation device is a second channel estimation device, and the second channel estimation device includes: a transmission module; The transmitting module is used to transmit first target information to the first channel estimation device, wherein the first target information is used to indicate the parameters of the backscatter signal transmitted by the BSC device; The backscattered signal is obtained by the BSC device modulating a first signal, where the first signal is sent from the second channel estimation device to the first channel estimation device. The first target information is used by the first channel estimation device to determine whether to perform joint channel estimation on the first signal.

32. The channel estimation apparatus according to claim 31, characterized in that, The second channel estimation device further includes: a receiving module; The receiving module is used to receive second target information from the first device; The second target information is used to indicate the parameters of the backscatter signal sent by the BSC device; the first target information is determined based on the second target information. The first device includes any one of the following: the BSC device, or other channel estimation devices.

33. The channel estimation apparatus according to claim 32, characterized in that, The sending module is further configured to send a fifth request message to the first device, the fifth request message being used to request: the BSC device to send parameters of the backscatter signal.

34. The channel estimation apparatus according to claim 31, characterized in that, The sending module is further configured to send a second request message to the first channel estimation device, the second request message being used to request: the first channel estimation device to determine whether the received signal is associated with the backscattered signal; The sending module is specifically used to send the first target information to the first channel estimation device when the second channel estimation device receives the first feedback message from the first channel estimation device. The first feedback message is used to indicate that the signal received by the first channel estimation device is associated with the backscattered signal.

35. A terminal, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the channel estimation method as described in any one of claims 1 to 17.

36. A network-side device, characterized in that, It includes a processor and a memory, the memory storing programs or instructions that can run on the processor, the programs or instructions being executed by the processor to implement the steps of the channel estimation method as described in any one of claims 14 to 17.

37. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the channel estimation method as described in any one of claims 1 to 17.

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