Channel Estimation Method, Device, Communication Equipment and Storage Medium Based on Channel Regulation Device

Abstract

The present application discloses a channel estimation method, apparatus, communication device, and storage medium based on a channel regulation device, relating to the field of communication technologies. The specific implementation solution is as follows: receive a first pilot signal sent by a second communication device to obtain a first received signal, adjust the phases of each electromagnetic unit in the channel regulation device, receive the first pilot signal sent by the second communication device again to obtain a second received signal, and determine the channel estimation of the line-of-sight channel between the first communication device and the second communication device according to the first received signal and the second received signal. This method can simply and quickly complete channel estimation in a communication scenario based on a channel regulation device, and does not affect the channel regulation device's assisting communication with other communication devices, reducing the computational complexity of channel estimation and improving the efficiency of channel estimation.

Description

Technical Field

[0001] The present application relates to the field of communication technologies, and in particular, to a channel estimation method, apparatus, server, and storage medium based on a channel regulation device. Background Art

[0002] With the continuous development of communication technologies, the technology of Reconfigurable Intelligent Surface (RIS) has gradually attracted the attention of the industry. In a communication scenario with RIS introduced, in addition to the direct line-of-sight channel between the Base Station (BS) and the User Equipment (UE), there are also channels between the BS and the RIS and between the UE and the RIS.

[0003] In order to estimate the channels in the above communication scenario, in related technologies, generally, the power of the RIS is cut off to complete the splitting of the direct line-of-sight channel between the BS and the UE and the cascaded channel between the BS-RIS-UE. However, cutting off the power of the RIS will inevitably affect the communication of the RIS assisting other users. Moreover, when restoring the BS-RIS channel and the RIS-UE channel respectively in the cascaded channel of the BS-RIS-UE, the mathematical methods used are also very complex. Summary of the Invention

[0004] The present application provides a channel estimation method, apparatus, device, and storage medium based on a channel regulation device.

[0005] According to a first aspect of the present application, there is provided a channel estimation method based on a channel regulation device, which is applied to a first communication device, and the method includes:

[0006] Receiving a first pilot signal sent by a second communication device to obtain a first received signal; wherein, the first received signal includes a first pilot signal reflected by the channel regulation device and a first pilot signal not reflected by the channel regulation device;

[0007] Adjusting the phases of the electromagnetic units in the channel regulation device;

[0008] Receiving a first pilot signal sent again by the second communication device to obtain a second received signal; wherein, the second received signal includes a first pilot signal reflected by the channel regulation device with adjusted phases and a first pilot signal not reflected by the channel regulation device with adjusted phases;

[0009] Determining a channel estimation of the direct line-of-sight channel between the first communication device and the second communication device according to the first received signal and the second received signal.

[0010] Optionally, adjusting the phases of the electromagnetic units in the channel regulation device includes:

[0011] Sending a control signal to the channel regulation device, where the control signal is used to control the phases of the electromagnetic units in the channel regulation device to be adjusted from the initial phase to the inverted phase of the initial phase.

[0012] Optionally, determining the channel estimation of the direct vision channel between the first communication device and the second communication device according to the first received signal and the second received signal includes:

[0013] Determining the first pilot signal that only passes through the direct vision channel according to the sum of the first received signal and the second received signal;

[0014] Determining the channel estimation of the direct vision channel according to the first pilot signal that only passes through the direct vision channel.

[0015] Optionally, the method further includes:

[0016] Sending a third control signal to the channel regulation device, where the third control signal is used to control the phases of the electromagnetic units of the channel regulation device to be adjusted to a preset phase;

[0017] Sending a third pilot signal to the channel regulation device;

[0018] Determining a third received signal, where the third received signal is the signal that the third pilot signal is reflected back to the first communication device by the channel regulation device;

[0019] Determining the channel estimation of the first channel between the first communication device and the channel regulation device according to the third pilot signal, the preset phase, and the third received signal.

[0020] Optionally, the method further includes:

[0021] Determining the channel estimation of the second channel between the second communication device and the channel regulation device according to the channel estimation of the first channel and the channel estimation of the direct vision channel.

[0022] According to the second aspect of the present application, a communication device is provided, including a memory, a transceiver, and a processor;

[0023] The memory is used to store a computer program; the transceiver is used to transmit and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

[0024] Receive a first pilot signal sent by a second communication device to obtain a first received signal; wherein, the first received signal includes a first pilot signal reflected by the channel regulation device and a first pilot signal not reflected by the channel regulation device;

[0025] Adjust the phases of the electromagnetic units in the channel regulation device;

[0026] Receive the first pilot signal sent again by the second communication device to obtain a second received signal; wherein, the second received signal includes a first pilot signal reflected by the channel regulation device after phase adjustment and a first pilot signal not reflected by the channel regulation device after phase adjustment;

[0027] Determine the channel estimation of the line-of-sight channel between the first communication device and the second communication device according to the first received signal and the second received signal.

[0028] Optionally, the adjusting the phases of the electromagnetic units in the channel regulation device includes:

[0029] Send a control signaling to the channel regulation device, where the control signaling is used to control the phases of the electromagnetic units in the channel regulation device to be adjusted from an initial phase to an inverted phase of the initial phase.

[0030] Optionally, the determining the channel estimation of the line-of-sight channel between the first communication device and the second communication device according to the first received signal and the second received signal includes:

[0031] Determine the first pilot signal that only passes through the line-of-sight channel according to the sum of the first received signal and the second received signal;

[0032] Determine the channel estimation of the line-of-sight channel according to the first pilot signal that only passes through the line-of-sight channel.

[0033] Optionally, the processor is further configured to execute:

[0034] Send a third control signaling to the channel regulation device, where the third control signaling is used to control the phases of the electromagnetic units in the channel regulation device to be adjusted to a preset phase;

[0035] Send a third pilot signal to the channel regulation device;

[0036] Determine a third received signal, where the third received signal is the signal that the third pilot signal is reflected back to the first communication device by the channel regulation device;

[0037] Determine the channel estimation of the first channel between the first communication device and the channel regulation device according to the third pilot signal, the preset phase, and the third received signal.

[0038] Optionally, the processor is further configured to execute:

[0039] Determine the channel estimation of the second channel between the second communication device and the channel regulation device according to the channel estimation of the first channel and the channel estimation of the direct vision channel.

[0040] According to a third aspect of the present application, there is provided a channel estimation device based on a channel regulation device, including:

[0041] A receiving module, configured to receive a first pilot signal sent by a second communication device to obtain a first received signal; wherein, the first received signal includes a first pilot signal reflected by the channel regulation device and a first pilot signal not reflected by the channel regulation device;

[0042] A control module, configured to control the channel regulation device to adjust the phases of the electromagnetic units;

[0043] The receiving module is further configured to receive a first pilot signal sent again by the second communication device to obtain a second received signal; wherein, the second received signal includes a first pilot signal reflected by the channel regulation device after phase adjustment and a first pilot signal not reflected by the channel regulation device after phase adjustment;

[0044] An estimation module, configured to determine the channel estimation of the direct vision channel between the first communication device and the second communication device according to the first received signal and the second received signal.

[0045] According to a fourth aspect of the present application, there is provided a processor-readable storage medium storing a computer program, and the computer program is used to cause the processor to execute the channel estimation method based on the channel regulation device described in the first aspect.

[0046] The technical solutions provided in the embodiments of the present application have the following beneficial effects:

[0047] In this application, the first device can receive the first pilot signal sent by the second communication device to obtain a first received signal. Among them, the first received signal includes the first pilot signal reflected by the channel regulation device and the first pilot signal not reflected by the channel regulation device. The channel regulation device is controlled to adjust the phases of each electromagnetic unit, and the first pilot signal sent again by the second communication device is received to obtain a second received signal. Among them, the second received signal includes the first pilot signal reflected by the channel regulation device after phase adjustment and the first pilot signal not reflected by the channel regulation device after phase adjustment. According to the first received signal and the second received signal, the channel estimation of the direct vision channel between the first communication device and the second communication device is determined. The method provided by the embodiments of this application can simply and quickly complete the channel estimation in the communication scenario based on the channel regulation device, and does not affect the channel regulation device's auxiliary communication with other communication devices. This method can directly determine the channel estimation between the first and second communication devices through the first received signal and the second received signal. After determining the channel estimation between a communication device and the channel regulation device, the channel estimation between another communication device and the channel regulation device can be simply and quickly calculated without having to recover the two-channel estimations from the complex cascaded channel, reducing the computational complexity of the channel estimation and improving the efficiency of the channel estimation.

[0048] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of this application, nor is it used to limit the scope of this application. Other features of this application will become easily understood through the following description. Brief Description of the Drawings

[0049] The drawings are used to better understand the solution and do not constitute a limitation to this application. Among them:

[0050] Figure 1 is a schematic structural diagram of a communication system provided by an embodiment of this application;

[0051] Figure 2 is a schematic flowchart of a channel estimation method based on a channel regulation device provided by an embodiment of this application;

[0052] Figure 3 is a schematic flowchart of another channel estimation method based on a channel regulation device provided by an embodiment of this application;

[0053] Figure 4 is a schematic diagram of a first communication device receiving a pilot signal sent by a second communication device provided by this application;

[0054] Figure 5 is a schematic structural diagram of a communication device provided by an embodiment of this application;

[0055] Figure 6 It is a schematic structural diagram of a channel estimation device based on a channel regulation device provided by an embodiment of the present application;

[0056] Figure 7 It is a schematic structural diagram of another channel estimation device based on a channel regulation device provided by an embodiment of the present application. Detailed implementation manners

[0057] In the embodiments of the present application, the term "and / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0058] In the embodiments of the present application, the term "a plurality of" means two or more, and other quantifiers are similar thereto.

[0059] In the related art, the research on channel estimation based on a channel regulation device mainly focuses on reducing the maximum completion time, improving resource utilization, reducing energy consumption, and ensuring load balance, etc., and often ignores the priority requirements of tasks. The priorities of different users and different tasks are high or low, and tasks with higher priorities should be processed first.

[0060] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0061] The embodiments of the present application provide a channel estimation method, device, communication device, and storage medium based on a channel regulation device, which can simply and quickly complete channel estimation in a communication scenario based on a channel regulation device, and does not affect the channel regulation device to assist other communication devices in communication, reduces the computational complexity of channel estimation, and improves the efficiency of channel estimation.

[0062] To better understand a channel estimation method based on a channel regulation device disclosed in the embodiments of the present application, the communication system applicable to the embodiments of the present application will be described first.

[0063] Please refer to Figure 1 , Figure 1 which is a schematic architecture diagram of a communication system provided by an embodiment of the present application. The communication system includes but is not limited to a first communication device, a second communication device, and a channel regulation device. Figure 1The illustrated communication system takes, for example, a first communication device 101, a second communication device 102, and a channel regulation device 103 as an example.

[0064] It should be noted that the technical solutions provided in the embodiments of this application can be applied to various communication systems, especially 5G systems. For example, applicable systems can be the global system of mobile communication (GSM) system, code division multiple access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) general packet radio service (GPRS) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, long term evolution advanced (LTE-A) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G New Radio (NR) system, etc. Both terminal devices and network devices are included in these various systems. The system may also include a core network part, such as the Evolved Packet System (EPS), 5G System (5GS), etc.

[0065] In the embodiments of this application, the first communication device 101 can be a network device, a terminal device, or other devices with communication functions. The second communication device 102 can also be a network device, a terminal device, or other devices with communication functions.

[0066] The channel regulation device 103 is a device capable of regulating a communication channel. A large number of electromagnetic units are equipped in the channel regulation device 103, and by adjusting the physical properties (such as capacitive reactance, impedance, or inductive reactance) of the electromagnetic units, the radiation characteristics of the electromagnetic units can be changed, and then the electromagnetic waves in space can be dynamically regulated to form a beam in a specific direction in space. For example, the channel regulation device 103 can be a Reconfigurable Intelligent Surface (RIS), a large intelligent surface, a programmable surface, etc.

[0067] In the embodiment of the present application, the electromagnetic units in the channel regulation device 103 can be active or passive.

[0068] In the related art, the channel regulation device 103 with all passive electromagnetic units does not have complex signal processing capabilities, which leads to certain difficulties in obtaining Channel Status Information (CSI) in a communication scenario based on the channel regulation device 103. For the case where all the electromagnetic units in the channel regulation device 103 are passive, usually, the line-of-sight channel between the first communication device 101 and the second communication device 102 and the cascaded channel between the first communication device 101, the channel regulation device 103, and the second communication device 102 are split by powering off the channel regulation device 103. However, in an actual communication scenario, powering off the channel regulation device 103 will inevitably affect the communication of other users assisted by the channel regulation device 103. In addition, when restoring the first communication device 101-channel regulation device 103 channel and the channel regulation device 103-second communication device 102 channel respectively in the cascaded channel between the first communication device 101, the channel regulation device 103, and the second communication device 102, the mathematical method used is too complex and lacks certain practical application value.

[0069] When some of the electromagnetic units on the channel regulation device 103 are active units, it can autonomously obtain CSI by using the active electromagnetic units with sensing and signal processing capabilities. However, the deployment of active electromagnetic units will increase the hardware cost and the complexity of signal processing. In addition, it is also necessary to balance the relationship between the number and arrangement of active electromagnetic units and the actual transmission requirements.

[0070] A channel estimation method based on a channel regulation device provided by an embodiment of the present application receives a first pilot signal sent by a second communication device to obtain a first received signal. Among them, the first received signal includes a first pilot signal reflected by the channel regulation device and a first pilot signal not reflected by the channel regulation device. Control the channel regulation device to adjust the phases of each electromagnetic unit, receive the first pilot signal sent by the second communication device again to obtain a second received signal. Among them, the second received signal includes a first pilot signal reflected by the channel regulation device after phase adjustment and a first pilot signal not reflected by the channel regulation device after phase adjustment. According to the first received signal and the second received signal, determine the channel estimation of the direct vision channel between the first communication device and the second communication device. The method provided by the embodiment of the present application can simply and quickly complete channel estimation in a communication scenario based on a channel regulation device, and does not affect the channel regulation device's auxiliary communication with other communication devices, reducing the computational complexity of channel estimation and improving the efficiency of channel estimation.

[0071] Figure 2 It is a schematic flowchart of a channel estimation method based on a channel regulation device provided by an embodiment of the present application. It should be noted that this method is executed by a first communication device.

[0072] As Figure 2 shown, a channel estimation method based on a channel regulation device in an embodiment of the present application mainly includes the following steps:

[0073] Step S201, receive the first pilot signal sent by the second communication device to obtain a first received signal.

[0074] Among them, the first received signal includes a first pilot signal reflected by the channel regulation device and a first pilot signal not reflected by the channel regulation device.

[0075] The first pilot signal not reflected by the channel regulation device is, that is, the first pilot signal transmitted through the direct vision channel between the first communication device and the second communication device.

[0076] The first pilot signal reflected by the channel regulation device is, that is, the first pilot signal transmitted through the second channel between the second communication device and the channel regulation device and the first channel between the channel regulation device and the first communication device.

[0077] The first communication device can receive the first pilot signal sent by the second communication device to obtain a first received signal.

[0078] In some embodiments, the first communication device sends fourth control signaling to the second communication device, where the fourth control signaling is used to instruct the second communication device to send the first pilot signal.

[0079] Step S202: Adjust the phases of the electromagnetic units in the channel regulation device.

[0080] As described above, a large number of electromagnetic units are equipped in the channel regulation device, and the radiation characteristics of the electromagnetic units can be changed by adjusting the physical properties (such as capacitive reactance, impedance, or inductive reactance) of the electromagnetic units, so that the electromagnetic waves in space can be dynamically regulated to form a beam in a specific direction in space.

[0081] In the embodiments of the present application, the first communication device can control the channel regulation device to adjust the phases of the electromagnetic units.

[0082] Optionally, the first communication device can send control signaling to the channel regulation device to control the channel regulation device to adjust the phases of the electromagnetic units.

[0083] In some embodiments, the first communication device sends control signaling to the channel regulation device, and the control signaling is used to control the phases of the electromagnetic units in the channel regulation device to adjust the initial phase to the opposite phase of the initial phase.

[0084] That is, in some embodiments, the first communication device controls the channel regulation device to adjust the phases of the electromagnetic units to the opposite phase of the initial phase.

[0085] Wherein, the initial phase is the phase of each electromagnetic unit of the channel regulation device that has not undergone phase adjustment, that is, the phase of each electromagnetic unit of the channel regulation device at step S201.

[0086] In the embodiments of the present application, the initial phase of each electromagnetic unit in the channel regulation device can also be determined by the first communication device sending control signaling to the channel regulation device to control the channel regulation device to make adjustments.

[0087] Step S203: Receive the first pilot signal re-emitted by the second communication device to obtain a second received signal.

[0088] Wherein, the second received signal includes the first pilot signal reflected by the channel regulation device after phase adjustment and the first pilot signal reflected by the channel regulation device without phase adjustment.

[0089] Similarly, the first pilot signal that is not reflected by the channel regulation device, that is, the first pilot signal transmitted through the direct vision channel between the first communication device and the second communication device.

[0090] The first pilot signal reflected by the channel regulation device, that is, the first pilot signal transmitted through the second channel between the second communication device and the channel regulation device and the first channel between the channel regulation device and the first communication device.

[0091] It can be understood that the channel regulation device described in this step is the channel regulation device after phase adjustment.

[0092] The second communication device sends the first pilot signal again, and the first communication device receives the first pilot signal sent again by the second communication device to obtain a second received signal.

[0093] In some embodiments, the first communication device sends a fifth control signal to the second communication device, where the fifth control signal is used to instruct the second communication device to send the first pilot signal again.

[0094] Step S204, determine the channel estimation of the direct vision channel between the first communication device and the second communication device according to the first received signal and the second received signal.

[0095] The first communication device can determine the channel estimation of the direct vision channel between the first communication device and the second communication device according to the first received signal and the second received signal, realizing the splitting of the channel.

[0096] In the embodiment of the present application, the first communication device can also send a third control signal to the channel regulation device, where the third control signal is used to control the phase adjustment of each electromagnetic unit of the channel regulation device to a preset phase; send a third pilot signal to the channel regulation device; determine a third received signal, where the third received signal is the signal that the third pilot signal is reflected back to the first communication device by the channel regulation device; determine the channel estimation of the first channel between the first communication device and the channel regulation device according to the third pilot signal, the preset phase, and the third received signal.

[0097] In the embodiment of the present application, the first communication device can also determine the channel estimation of the second channel between the second communication device and the channel regulation device according to the channel estimation of the first channel and the channel estimation of the direct vision channel.

[0098] The channel estimation method based on a channel regulation device according to an embodiment of the present application receives a first pilot signal sent by a second communication device to obtain a first received signal, adjusts the phases of the electromagnetic units in the channel regulation device, and receives the first pilot signal sent by the second communication device again to obtain a second received signal. According to the first received signal and the second received signal, the channel estimation of the direct vision channel between the first communication device and the second communication device is determined, which can simply and quickly complete the channel estimation in the communication scenario based on the channel regulation device, and does not affect the channel regulation device's auxiliary communication with other communication devices, reducing the computational complexity of channel estimation and improving the efficiency of channel estimation.

[0099] Figure 3 FIG. is a schematic flowchart of another channel estimation method based on a channel regulation device provided by an embodiment of the present application. It should be noted that this method is executed by a first communication device.

[0100] As Figure 3 shown, another channel estimation method based on a channel regulation device according to an embodiment of the present application mainly includes the following steps:

[0101] Step S301: Send a first control signal to the channel regulation device. The first control signal is used to control the phase of each electromagnetic unit of the channel regulation device to be adjusted to a preset phase.

[0102] The first communication device can adjust the phases of the electromagnetic units in the channel regulation device to a preset phase by sending a first control signal to the channel regulation device.

[0103] It can be understood that this preset phase is known to the first communication device, that is, the first communication device can determine that the phases of the electromagnetic units of the channel regulation device are the preset phases.

[0104] Assume that the channel regulation device includes N electromagnetic units, and the first communication device controls the phases of the electromagnetic units of the channel regulation device to be adjusted to [θ1, θ2, …, θ n , …, θ N-1 , θ N .

[0105] Step S302: Send a third pilot signal to the channel regulation device.

[0106] After the first communication device controls and adjusts the phases of the electromagnetic units of the channel regulation device, it sends a pilot signal to the channel regulation device. This pilot signal can be reflected by the channel regulation device and received by the first communication device.

[0107] Step S303: Determine the third received signal.

[0108] Among them, the third received signal is the signal that the third pilot signal is reflected back to the first communication device by the channel regulation device.

[0109] The third received signal is also the third pilot signal transmitted through the first channel between the first communication device and the channel regulation device.

[0110] Step S304, determine the channel estimation of the first channel between the first communication device and the channel regulation device according to the third pilot signal, the preset phase, and the third received signal.

[0111] The first communication device can determine the channel estimation of the first channel between the first communication device and the channel regulation device according to the third pilot signal, the preset phase, and the third received signal, denoted as

[0112] In the embodiment of the present application, since the channel regulation device includes a large number of electromagnetic units, that is, the value of N is often large, the dimension of the first channel between the first communication device and the channel regulation device is relatively large, and the complexity of channel estimation is also relatively high.

[0113] As a possible implementation manner, in order to obtain the CSI between the first communication device and the channel regulation device more accurately, the electromagnetic units of the channel regulation device can be grouped, and the channel between the first communication device and the channel regulation device can be estimated by turning on each group of electromagnetic units of the channel regulation device one by one.

[0114] For example, first turn on a group of units in the channel regulation device and power off the remaining groups of units, and then the first communication device sends a third pilot signal to the channel regulation device. Because only one group of channel regulation device units is turned on and the remaining channel regulation device units are powered off, only the turned-on channel regulation device units have the effect of phase regulation on the pilot signal. After the first communication device receives the pilot signal reflected back by the turned-on channel regulation device units, the CSI from all antenna units on the first communication device to each unit in this group of channel regulation devices can be estimated according to the third pilot signal sent by the first communication device. Then, turn on the next group of units in the channel regulation device and power off the remaining units, and repeat the above steps until the CSI from all antenna units on the first communication device to all units on the channel regulation device is obtained, that is, the channel estimation process between the first communication device and the channel regulation device is completed.

[0115] Step S305, send a fourth control signaling to the second communication device, and the fourth control signaling is used to instruct the second communication device to send a first pilot signal.

[0116] The first communication device sends a fourth control signal to the second communication device, and the fourth control signal is used to instruct the second communication device to send a first pilot signal X.

[0117] Step S306: Receive the first pilot signal sent by the second communication device to obtain a first received signal.

[0118] The first received signal includes the first pilot signal reflected by the channel regulation device and the first pilot signal not reflected by the channel regulation device. As Figure 4 shown, Figure 4 This is a schematic diagram of the first communication device receiving the pilot signal sent by the second communication device provided by this application.

[0119] The first pilot signal not reflected by the channel regulation device, that is, the first pilot signal transmitted through the direct vision channel between the first communication device and the second communication device.

[0120] The first pilot signal reflected by the channel regulation device, that is, the first pilot signal transmitted through the second channel between the second communication device and the channel regulation device and the first channel between the channel regulation device and the first communication device.

[0121] Assume that the first received signal is denoted as Y1, the first pilot signal is denoted as X, the direct vision channel is represented by H3, the first channel is represented by H1, and the second channel is represented by H2. Then the first received signal is expressed as:

[0122] Y1 = (H3 + H1Φ1H2)X + W, (1)

[0123] where W is Gaussian white noise. Φ1 is the reflection coefficient matrix of the channel regulation device, and is specifically expressed as:

[0124]

[0125] Step S307: Send a second control signal to the channel regulation device, and the second control signal is used to control the phase of each electromagnetic unit of the channel regulation device to be adjusted to the inverse of the preset phase.

[0126] The first communication device can adjust the phase of each electromagnetic unit in the channel regulation device to the inverse of the preset phase by sending a second control signal to the channel regulation device.

[0127] That is, the first communication device controls the phase of each electromagnetic unit of the channel regulation device to be adjusted to [θ′1, θ′2, …, θ′ n , …, θ′ N-1 , θ′ N by sending a second control signal to the channel regulation device, where θ′ n = θn +180°.

[0128] Step S308, the first communication device sends a fifth control signaling to the second communication device, where the fifth control signaling is used to instruct the second communication device to send the first pilot signal again.

[0129] The first communication device sends a fifth control signaling to the second communication device, where the fifth control signaling is used to instruct the second communication device to send the first pilot signal X again.

[0130] Step S309, receive the first pilot signal sent again by the second communication device to obtain a second received signal.

[0131] Among them, the second received signal includes the first pilot signal reflected by the channel regulating device after phase adjustment and the first pilot signal reflected by the channel regulating device without phase adjustment.

[0132] Similarly, the first pilot signal not reflected by the channel regulating device is the first pilot signal transmitted through the direct vision channel between the first communication device and the second communication device.

[0133] The first pilot signal reflected by the channel regulating device is the first pilot signal transmitted through the second channel between the second communication device and the channel regulating device and the first channel between the channel regulating device and the first communication device.

[0134] It can be understood that the channel regulating device described in this step is the channel regulating device after phase adjustment.

[0135] Assume that the second received signal is denoted as Y2. Similarly, the first pilot signal is denoted as X, the direct vision channel is denoted as H3, the first channel is denoted as H1, and the second channel is denoted as H2. Then the second received signal is expressed as:

[0136] Y2 = (H3 + H1Φ2H2)X + W, (2)

[0137] Among them, W is Gaussian white noise. Φ2 is the reflection coefficient matrix of the channel regulating device after phase adjustment, and is specifically expressed as:

[0138]

[0139] Therefore, the second received signal Y2 can be re-expressed as:

[0140] Y2 = (H3 - H1Φ1H2)X + W. (3)

[0141] Step S310: Determine the channel estimation of the line-of-sight channel between the first communication device and the second communication device according to the first received signal and the second received signal.

[0142] According to the representations of the first received signal Y1 and the second received signal Y2 described in the previous steps, adding Equation (1) and Equation (3) can obtain Equation (4):

[0143] Y2 = H3X + W. (4)

[0144] According to Equation (4), it is easy to obtain the channel estimation of the line-of-sight channel between the first communication device and the second communication device by using a channel estimation algorithm, denoted as

[0145] In the embodiment of the present application, any channel estimation algorithm can be used to estimate the line-of-sight channel H3, such as the commonly used least squares (LS) algorithm, minimum mean square error (MMSE) algorithm, etc., which is not limited herein.

[0146] Step S311: Determine the channel estimation of the second channel between the second communication device and the channel adjustment device according to the channel estimation of the first channel and the channel estimation of the line-of-sight channel.

[0147] After obtaining the estimated value of the first channel between the first communication device and the channel adjustment device and the estimated value of the line-of-sight channel between the first communication device and the second communication device then and can be substituted into Equation (1) or Equation (3), and the channel estimation algorithm can be used to solve the estimated value of the second channel between the channel adjustment device and the second communication device

[0148] Here, taking the substitution of the estimated value of the first channel between the first communication device and the channel adjustment device and the estimated value of the line-of-sight channel between the first communication device and the second communication device into Equation (1) as an example, the estimation process of the second channel H2 between the channel adjustment device and the second communication device is described.

[0149] Substituting and into Equation (1), Equation (5) can be obtained:

[0150]

[0151] Then, expand Equation (5) and move to the left end of the equation to obtain Equation (6):

[0152]

[0153] Finally, multiply both sides of Equation (6) on the left by to obtain Equation (7):

[0154]

[0155] Since the estimated value of the first channel between the first communication device and the channel regulation device the estimated value of the line-of-sight channel between the first communication device and the second communication device the first pilot signal X, the reflection coefficient matrix Φ1 of the channel regulation device, and the first received signal Y1 are known, so denote and Then Equation (7) can be expressed as Equation (8):

[0156]

[0157] It can be understood that Equation (8) has the same form as the signal model of the traditional MIMO (multiple-in multiple-out) channel. Therefore, the estimated value of the second channel between the channel regulation device and the second communication device can be solved using the MIMO channel estimation algorithm

[0158] Similarly, in the embodiments of the present application, for the estimation of the second channel H2, any channel estimation algorithm can also be used, such as the commonly used least squares (LS) algorithm, minimum mean square error (MMSE) algorithm, etc., which are not limited herein.

[0159] In addition, it should be noted that it can be understood that in the embodiments of the present application, the roles of the first communication device and the second communication device can be interchanged, that is, the first communication device can replace the functions and roles of the second communication device, and the second communication device can also replace the functions and roles of the first communication device. That is, the second communication device in the embodiments of the present application can also complete the channel estimation method described in the embodiments of the present application.

[0160] The channel estimation method based on a channel regulation device according to an embodiment of the present application includes: sending a first control signal to the channel regulation device, where the first control signal is used to control the phase of each electromagnetic unit of the channel regulation device to be adjusted to a preset phase; sending a third pilot signal to the channel regulation device, determining a third received signal, and determining the channel estimation of a first channel between a first communication device and the channel regulation device according to the third pilot signal, the preset phase, and the third received signal; sending a fourth control signal to a second communication device, where the fourth control signal is used to instruct the second communication device to send a first pilot signal, receiving the first pilot signal sent by the second communication device to obtain a first received signal; sending a second control signal to the channel regulation device, where the second control signal is used to control the phase of each electromagnetic unit of the channel regulation device to be adjusted to the inverse of the preset phase; the first communication device sending a fifth control signal to the second communication device, where the fifth control signal is used to instruct the second communication device to send the first pilot signal again, receiving the first pilot signal sent again by the second communication device to obtain a second received signal, determining the channel estimation of a direct vision channel between the first communication device and the second communication device according to the first received signal and the second received signal, and determining the channel estimation of a second channel between the second communication device and the channel regulation device according to the channel estimation of the first channel and the channel estimation of the direct vision channel. It can simply and quickly complete channel estimation in a communication scenario based on a channel regulation device, and does not affect the channel regulation device's auxiliary communication with other communication devices, reducing the computational complexity of channel estimation and improving the efficiency of channel estimation.

[0161] To implement the above embodiment, an embodiment of the present application also proposes a communication device. Figure 5 It is a schematic structural diagram of a communication device provided by an embodiment of the present application.

[0162] As Figure 5 shown, the server includes: a memory 501, a transceiver 502, and a processor 503.

[0163] Among them, the memory 501 is used to store a computer program; the transceiver 502 is used to send and receive data under the control of the processor; the processor 503 is used to read the computer program in the memory and perform the following operations:

[0164] Receiving the first pilot signal sent by the second communication device to obtain a first received signal; where the first received signal includes the first pilot signal reflected by the channel regulation device and the first pilot signal not reflected by the channel regulation device;

[0165] Adjusting the phase of each electromagnetic unit in the channel regulation device;

[0166] Receive the first pilot signal re - transmitted by the second communication device to obtain a second received signal; wherein, the second received signal includes the first pilot signal reflected by the channel adjustment device after phase adjustment and the first pilot signal reflected by the channel adjustment device without the phase adjustment.

[0167] Determine the channel estimation of the line - of - sight channel between the first communication device and the second communication device according to the first received signal and the second received signal.

[0168] As a possible implementation manner, adjusting the phases of the electromagnetic units in the channel adjustment device includes:

[0169] Send a control signal to the channel adjustment device, and the control signal is used to control the phases of the electromagnetic units in the channel adjustment device to be adjusted from the initial phase to the opposite phase of the initial phase.

[0170] As a possible implementation manner, the determining the channel estimation of the line - of - sight channel between the first communication device and the second communication device according to the first received signal and the second received signal includes:

[0171] Determine the first pilot signal that only passes through the line - of - sight channel according to the sum of the first received signal and the second received signal;

[0172] Determine the channel estimation of the line - of - sight channel according to the first pilot signal that only passes through the line - of - sight channel.

[0173] As a possible implementation manner, the processor is further configured to execute:

[0174] Send a third control signal to the channel adjustment device, and the third control signal is used to control the phases of the electromagnetic units in the channel adjustment device to be adjusted to a preset phase;

[0175] Send a third pilot signal to the channel adjustment device;

[0176] Determine a third received signal, where the third received signal is the signal that the third pilot signal is reflected back to the first communication device by the channel adjustment device;

[0177] Determine the channel estimation of the first channel between the first communication device and the channel adjustment device according to the third pilot signal, the preset phase, and the third received signal.

[0178] As a possible implementation manner, before receiving the first pilot signal sent by the second communication device, it further includes:

[0179] Send a fourth control signal to the second communication device, where the fourth control signal is used to instruct the second communication device to send a first pilot signal.

[0180] As a possible implementation, after the control channel regulating device adjusts the phases of the electromagnetic units, it further includes:

[0181] Send a fifth control signal to the second communication device, where the fifth control signal is used to instruct the second communication device to send the first pilot signal again.

[0182] As a possible implementation, the processor is further configured to execute:

[0183] Determine the channel estimation of the second channel between the second communication device and the channel regulating device according to the channel estimation of the first channel and the channel estimation of the direct vision channel.

[0184] It should be noted that the above server provided in the embodiments of the present application can implement all the method steps implemented in the above Figures 2 - 3 method embodiments, and can achieve the same technical effects. The same parts and beneficial effects as those in the method embodiments will not be elaborated herein.

[0185] To implement the above embodiments, the embodiments of the present application also propose a channel estimation device based on a channel regulating device. Figure 6 It is a schematic structural diagram of a channel estimation device based on a channel regulating device provided in the embodiments of the present application.

[0186] As Figure 6 shown, the device includes: a receiving module 601, a control module 602, and an estimation module 603.

[0187] Among them, the receiving module 601 is configured to receive the first pilot signal sent by the second communication device to obtain a first received signal; among them, the first received signal includes the first pilot signal reflected by the channel regulating device and the first pilot signal not reflected by the channel regulating device;

[0188] The control module 602 is configured to adjust the phases of the electromagnetic units in the channel regulating device;

[0189] The receiving module 601 is further configured to receive the first pilot signal sent by the second communication device again to obtain a second received signal; among them, the second received signal includes the first pilot signal reflected by the channel regulating device after phase adjustment and the first pilot signal not reflected by the channel regulating device after phase adjustment;

[0190] An estimation module 603, configured to determine a channel estimation of a line-of-sight channel between the first communication device and the second communication device according to the first received signal and the second received signal.

[0191] As a possible implementation manner, the control module 602 is specifically configured to:

[0192] Send a control signaling to the channel regulation device, where the control signaling is used to control the phases of the electromagnetic units of the channel regulation device to be adjusted from an initial phase to an inverted phase of the initial phase.

[0193] As a possible implementation manner, the estimation module 603 is specifically configured to:

[0194] Determine a first pilot signal that only passes through the line-of-sight channel according to a sum of the first received signal and the second received signal;

[0195] Determine a channel estimation of the line-of-sight channel according to the first pilot signal that only passes through the line-of-sight channel.

[0196] As a possible implementation manner, as Figure 7 shown, Figure 7 is a schematic structural diagram of another channel estimation device based on a channel regulation device provided in an embodiment of the present application. The device further includes:

[0197] A first sending module 604, configured to send a third control signaling to the channel regulation device, where the third control signaling is used to control the phases of the electromagnetic units of the channel regulation device to be adjusted to a preset phase;

[0198] The first sending module 604 is further configured to send a third pilot signal to the channel regulation device;

[0199] The receiving module 601 is further configured to determine a third received signal, where the third received signal is a signal that the third pilot signal is reflected back to the first communication device through the channel regulation device;

[0200] The estimation module 603 is further configured to determine a channel estimation of a first channel between the first communication device and the channel regulation device according to the third pilot signal, the preset phase, and the third received signal.

[0201] As a possible implementation manner, the device further includes:

[0202] A second sending module 605, configured to send a fourth control signaling to the second communication device, where the fourth control signaling is used to instruct the second communication device to send a first pilot signal.

[0203] As a possible implementation manner, the device further includes:

[0204] A third sending module 606, configured to send a fifth control signaling to the second communication device, where the fifth control signaling is used to instruct the second communication device to send the first pilot signal again.

[0205] As a possible implementation manner, the estimation module 603 is further configured to:

[0206] Determine a channel estimation of a second channel between the second communication device and the channel regulation device according to the channel estimation of the first channel and the channel estimation of the line-of-sight channel.

[0207] It should be noted that the above channel estimation device based on the channel regulation device provided in the embodiments of the present application can implement all the method steps implemented in the above Figures 2 - 3 method embodiments, and can achieve the same technical effects. The same parts and beneficial effects as those in the method embodiments in this embodiment will not be described in detail here.

[0208] It should be noted that in each embodiment of the present application, each functional unit may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0209] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a processor-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network-side device, etc.) or a processor to execute all or part of the steps of the methods in the embodiments of the present application. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc that can store program codes.

[0210] According to an embodiment of the present application, the present application further provides a processor-readable storage medium.

[0211] Wherein, the processor-readable storage medium stores a computer program, and the computer program is used to cause the processor to execute the above Figures 2 - 3The channel estimation method based on the channel regulation device described in the embodiment.

[0212] Among them, the processor-readable storage medium can be any available medium or data storage device accessible by the processor, including but not limited to magnetic memories (such as floppy disks, hard disks, magnetic tapes, magneto-optical discs (MO), etc.), optical memories (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor memories (such as ROM, EPROM, EEPROM, non-volatile memories (NANDFLASH), solid-state drives (SSD)), etc.

[0213] These computing programs (also referred to as programs, software, software applications, or code) include machine instructions for a programmable processor and can implement these computing programs using high-level procedures and / or object-oriented programming languages and / or assembly / machine languages. As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, device, and / or apparatus (such as a disk, optical disc, memory, programmable logic device (PLD)) for providing machine instructions and / or data to a programmable processor, including a machine-readable medium that receives machine instructions as a machine-readable signal. The term "machine-readable signal" refers to any signal for providing machine instructions and / or data to a programmable processor.

[0214] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which the user can provide input to the computer. Other kinds of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0215] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data server), or a computing system including middleware components (e.g., an application server), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by digital data communication in any form or medium (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), and the Internet.

[0216] A computer system can include clients and servers. The clients and servers are generally remote from each other and typically interact through a communication network. The client - server relationship is created by computer programs running on the respective computers and having a client - server relationship with each other.

[0217] Those skilled in the art will appreciate that the embodiments of the present application can be provided as a method, a system, or a computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer - usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer - usable program code.

[0218] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer - executable instructions. These computer - executable instructions can be provided to the processor of a general - purpose computer, a special - purpose computer, an embedded processor, or other programmable data - processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data - processing device produce means for implementing the functions specified in Figure 1 one or more of the processes or multiple processes and / or blocks Figure 1 one or more of the blocks or multiple blocks.

[0219] These processor - executable instructions can also be stored in a processor - readable memory that can direct a computer or other programmable data - processing device to operate in a particular manner, such that the instructions stored in the processor - readable memory produce a manufacture including instruction means that implement the functions in Figure 1 one or more of the processes or multiple processes and / or blocks Figure 1The functions specified in one or more boxes.

[0220] These processor-executable instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide for implementing the steps of the functions specified in one or more processes and / or boxes Figure 1 One or more processes and / or boxes Figure 1 The steps of the functions specified in one or more boxes.

[0221] It should be understood that various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution disclosed in this application can be achieved, and no limitations are imposed herein.

[0222] The above specific implementation manners do not constitute a limitation on the protection scope of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. A channel estimation method based on a channel regulation device, characterized in that Applied to a first communication device, the method includes: Receiving a first pilot signal sent by a second communication device to obtain a first received signal; wherein, the first received signal includes a first pilot signal reflected by the channel regulation device and a first pilot signal not reflected by the channel regulation device; Sending a control signaling to the channel regulation device, the control signaling being used to control the phases of the electromagnetic units in the channel regulation device to be adjusted from an initial phase to an inverted phase of the initial phase; Receiving the first pilot signal sent again by the second communication device to obtain a second received signal; wherein, the second received signal includes a first pilot signal reflected by the channel regulation device after phase adjustment and a first pilot signal not reflected by the channel regulation device after phase adjustment; Determining a channel estimation of the direct vision channel between the first communication device and the second communication device according to the first received signal and the second received signal.

2. The method according to claim 1, wherein The determining a channel estimation of the direct vision channel between the first communication device and the second communication device according to the first received signal and the second received signal includes: Determining the first pilot signal that only passes through the direct vision channel according to the sum of the first received signal and the second received signal; Determining the channel estimation of the direct vision channel according to the first pilot signal that only passes through the direct vision channel.

3. The method according to claim 1, wherein The method further includes: Sending a third control signaling to the channel regulation device, the third control signaling being used to control the phases of the electromagnetic units of the channel regulation device to be adjusted to a preset phase; Sending a third pilot signal to the channel regulation device; Determining a third received signal, the third received signal being the signal that the third pilot signal is reflected back to the first communication device by the channel regulation device; Determining a channel estimation of the first channel between the first communication device and the channel regulation device according to the third pilot signal, the preset phase and the third received signal.

4. The method according to claim 3, characterized in that, The method further includes: Determining a channel estimation of the second channel between the second communication device and the channel regulation device according to the channel estimation of the first channel and the channel estimation of the direct vision channel.

5. A communication device, characterized in that, Including a memory, a transceiver and a processor; The memory is used for storing a computer program; the transceiver is used for transceiving data under the control of the processor; the processor is used for reading the computer program in the memory and performing the following operations: Receiving a first pilot signal sent by a second communication device to obtain a first received signal; wherein, the first received signal includes a first pilot signal reflected by the channel regulation device and a first pilot signal not reflected by the channel regulation device; Sending a control signaling to the channel regulation device, the control signaling being used to control the phases of the electromagnetic units in the channel regulation device to be adjusted from an initial phase to an inverted phase of the initial phase; Receive the first pilot signal re - emitted by the second communication device to obtain a second received signal; wherein, the second received signal includes the first pilot signal reflected by the channel regulation device after phase adjustment and the first pilot signal reflected by the channel regulation device without phase adjustment; Determine the channel estimation of the direct - line channel between the first communication device and the second communication device according to the first received signal and the second received signal.

6. The communication device according to claim 5, characterized in that, The determining the channel estimation of the direct - line channel between the first communication device and the second communication device according to the first received signal and the second received signal includes: Determine the first pilot signal that only passes through the direct - line channel according to the sum of the first received signal and the second received signal; Determine the channel estimation of the direct - line channel according to the first pilot signal that only passes through the direct - line channel.

7. The communication device according to claim 5, characterized in that, The processor is further configured to execute: Send a third control signal to the channel regulation device, where the third control signal is used to control the phase adjustment of each electromagnetic unit of the channel regulation device to a preset phase; Send a third pilot signal to the channel regulation device; Determine a third received signal, where the third received signal is the signal that the third pilot signal is reflected back to the first communication device by the channel regulation device; Determine the channel estimation of the first channel between the first communication device and the channel regulation device according to the third pilot signal, the preset phase, and the third received signal.

8. The communication device according to claim 7, wherein The processor is further configured to execute: Determine the channel estimation of the second channel between the second communication device and the channel regulation device according to the channel estimation of the first channel and the channel estimation of the direct - line channel.

9. A channel estimation device based on a channel regulation device, characterized in that, Including: A receiving module, configured to receive the first pilot signal emitted by the second communication device to obtain a first received signal; wherein, the first received signal includes the first pilot signal reflected by the channel regulation device and the first pilot signal not reflected by the channel regulation device; A control module, configured to send a control signal to the channel regulation device, where the control signal is used to control the phase of each electromagnetic unit in the channel regulation device to be adjusted from the initial phase to the opposite phase of the initial phase; The receiving module is further configured to receive the first pilot signal re - emitted by the second communication device to obtain a second received signal; wherein, the second received signal includes the first pilot signal reflected by the channel regulation device after phase adjustment and the first pilot signal reflected by the channel regulation device without phase adjustment; An estimation module, configured to determine the channel estimation of the direct - line channel between the first communication device and the second communication device according to the first received signal and the second received signal.

10. A processor-readable storage medium, characterized in that, The processor - readable storage medium stores a computer program, and the computer program is used to cause the processor to execute the method according to any one of claims 1 to 5.

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