Target sensing method and communication device

Abstract

The invention provides a target sensing method and a communication device, and relates to the technical field of communication. A transmitter sends a sensing signal at a first frequency point; sending a sensing signal at a second frequency point; correspondingly, after the sensing signal is reflected by the sensing target, the receiver receives the sensing signal at a first frequency point; and the receiver receives the sensing signal at the second frequency point. Wherein the first frequency point and the second frequency point meet the configuration condition that the ratio of the square of the minimum frequency point to the product of the maximum frequency point and the target bandwidth is close to 1, and the minimum frequency point is the minimum frequency point in the first frequency point, the second frequency point and the absolute value frequency point of the difference value of the second frequency point and the first frequency point; the maximum frequency point is the maximum frequency point in the first frequency point, the second frequency point and the absolute value frequency point of the difference value, and the target bandwidth is the maximum value in the first bandwidth occupied by the first frequency point and the second bandwidth occupied by the second frequency point. Because the first frequency point and the second frequency point accord with the configuration condition, the search complexity of the integer fuzzy parameter is reduced.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of communication technologies, and in particular, to a target perception method and a communication device. Background Art

[0002] Wireless sensing technology analyzes the changes in wireless signals during propagation to obtain the characteristics of the signal propagation space (channel) for scene perception. How to perceive the surrounding environment while achieving communication has become a current research hotspot.

[0003] Related technologies have proposed two methods: matched-filter ranging and carrier-phase ranging. Among them, the matched-filter method is simple to operate, but the ranging accuracy is relatively low. Although the accuracy of the carrier-phase ranging method is high, there is a problem of phase cycle ambiguity, and a search for cycle ambiguity parameters is required. A solution has been proposed to determine the search space of the cycle ambiguity parameters based on the result of matched filtering. However, this search space is still large, and the search complexity is high. Summary of the Invention

[0004] The present application provides a target perception method and a communication device to reduce the search complexity of cycle ambiguity parameters.

[0005] In a first aspect, the present application provides a target perception method, which can be executed through the interaction between a transmitter and a receiver. Among them, the transmitter can be a terminal device, a network device, a chip or a circuit. The receiver can be a terminal device, a network device, a chip or a circuit. Optionally, the chip can be a chip in the terminal device. Optionally, the circuit can be a circuit in the terminal device. Optionally, the chip can be a chip in the network device. Optionally, the circuit can be a circuit in the network device. The present application does not limit this. This method can be applied to the 5th generation (5G) communication system, 5.5G or future 6G communication systems. This method can also be applied to non-terrestrial communication systems, etc., and the present application does not limit this. This method is executed as follows: th generation, 5G) communication system, 5.5G or future 6G communication systems. This method can also be applied to non-terrestrial communication systems, etc., and the present application does not limit this. This method is executed as follows:

[0006] The transmitter sends a sensing signal at a first frequency point; sends a sensing signal at a second frequency point; correspondingly, after the sensing signal is reflected by the sensing target, the receiver receives the sensing signal at the first frequency point; the receiver receives the sensing signal at the second frequency point. Among them, the first frequency point and the second frequency point meet the configuration condition that the ratio of the square of the minimum frequency point to the product of the maximum frequency point and the target bandwidth is close to 1. The minimum frequency point is the minimum of the first frequency point, the second frequency point, and the absolute value of the difference between the second frequency point and the first frequency point. The maximum frequency point is the maximum of the first frequency point, the second frequency point, and the absolute value of the difference. The target bandwidth is the maximum of the first bandwidth occupied by the first frequency point and the second bandwidth occupied by the second frequency point.

[0007] In this application, after the transmitter sends sensing signals to the sensing target at the first frequency point and the second frequency point, the receiver receives the sensing signals and obtains the carrier phase measurement results corresponding to the absolute value frequency points of the difference between the first frequency point and the second frequency point and between the second frequency point and the first frequency point. If the sensing target is a passive device, the sensing target can reflect, scatter or refract the sensing signals and then transmit the sensing signals to the receiver. If the sensing target is an active device, the sensing target can send the sensing signals to the receiver to obtain the carrier phase measurement results through the receiver, or receive the sensing signals from the transmitter and the sensing target itself obtains the carrier phase measurement results. Then, based on the carrier phase measurement results and the matched filter ranging results of the sensing target, the search space of the integer ambiguity parameter is determined. Since the first frequency point and the second frequency point meet the configuration condition that the ratio of the square of the minimum frequency point to the product of the maximum frequency point and the target bandwidth is close to 1, the search complexity of the integer ambiguity parameter is reduced.

[0008] In an alternative manner, the first frequency point and the second frequency point satisfy the following formula:

[0009]

[0010] where min{f} is the minimum frequency point, max{f} is the maximum frequency point, B is the target bandwidth, δ is the error threshold parameter, and the value range of δ is [0, 0.15].

[0011] In an alternative manner, there are multiple pairs of the first frequency point and the second frequency point that meet the formula requirements, and a pair of frequency points corresponding to the smallest value can be selected as the first frequency point and the second frequency point for sending the sensing signals.

[0012] Based on this, the search complexity of the integer ambiguity parameter can be further reduced.

[0013] In an alternative manner, the first frequency point and the second frequency point that meet the above conditions can be determined by an operation node of a third party based on the above configuration conditions. In this case, the transmitter or the receiver can pre-receive an indication message from the operation node, and the indication message is used to indicate the first frequency point and the second frequency point. Based on this, the calculation amount for the transmitter or the receiver to determine the first frequency point and the second frequency point that meet the above conditions can be reduced, and the sensing efficiency can be improved.

[0014] In yet another alternative manner, the receiver can also calculate the first frequency point and the second frequency point that meet the above conditions by itself based on the above configuration conditions and send a first notification message to the transmitter. The first notification message is used to indicate the above configuration conditions so that the transmitter can determine the first frequency point and the second frequency point that meet the above conditions according to the configuration conditions.

[0015] In another alternative, the transmitter can also calculate the first frequency point and the second frequency point that meet the above conditions based on the above configuration conditions by itself, and send a first notification message to the receiver. The first notification message is used to indicate the above configuration conditions, so that the receiver can determine the first frequency point and the second frequency point that meet the above conditions according to the configuration conditions.

[0016] In a second aspect, the present application provides a target sensing method, which can be executed by a transmitter. Among them, the transmitter can be a terminal device, a network device, a chip or a circuit. Optionally, the chip can be a chip in the terminal device. Optionally, the circuit can be a circuit in the terminal device. Optionally, the chip can be a chip in the network device. Optionally, the circuit can be a circuit in the network device. The present application does not make any limitations in this regard. This method can be applied to a 5G communication system, a 5.5G or future 6G communication system. This method can also be applied to a non-terrestrial communication system, etc., and the present application does not make any limitations in this regard. This method is executed as follows:

[0017] The transmitter sends a sensing signal at the first frequency point; the transmitter sends a sensing signal at the second frequency point; where the first frequency point and the second frequency point meet the configuration condition that the ratio of the square of the minimum frequency point to the product of the maximum frequency point and the target bandwidth is close to 1. The minimum frequency point is the minimum frequency point among the first frequency point, the second frequency point, and the absolute value frequency point of the difference between the second frequency point and the first frequency point. The maximum frequency point is the maximum frequency point among the first frequency point, the second frequency point, and the absolute value frequency point of the difference. The target bandwidth is the maximum value of the first bandwidth occupied by the first frequency point and the second bandwidth occupied by the second frequency point.

[0018] In an alternative, the first frequency point and the second frequency point satisfy the following formula:

[0019]

[0020] Among them, min{f} is the minimum frequency point, max{f} is the maximum frequency point, B is the target bandwidth, δ is an error threshold parameter, and the value range of δ is [0, 0.15].

[0021] In an alternative, there are multiple pairs of first frequency points and second frequency points that meet the formula requirements, and select The pair of frequency points corresponding to the minimum value of the value is used as the first frequency point and the second frequency point for sending the sensing signal.

[0022] In an alternative, the transmitter also receives an indication message from an operation node, and the indication message is used to indicate the first frequency point and the second frequency point.

[0023] In an alternative, the transmitter also receives a first notification message from the receiver. The first notification message is used to indicate the configuration conditions; the first frequency point and the second frequency point are determined according to the configuration conditions.

[0024] In an alternative manner, the transmitter also sends a second notification message to the receiver, and the second notification message is used to indicate a configuration condition, and the configuration condition is used for the receiver to determine a first frequency point and a second frequency point.

[0025] In a third aspect, the present application provides a target perception method, which can be executed by a receiver. Among them, the receiver can be a terminal device, a network device, a chip or a circuit. Optionally, the chip can be a chip in the terminal device. Optionally, the circuit can be a circuit in the terminal device. Optionally, the chip can be a chip in the network device. Optionally, the circuit can be a circuit in the network device. The present application does not make any limitation in this regard. This method can be applied to a 5G communication system, a 5.5G or future 6G communication system. This method can also be applied to a non-terrestrial communication system, etc., and the present application does not make any limitation in this regard. The method is executed as follows:

[0026] The receiver receives a sensing signal at a first frequency point; the receiver receives a sensing signal at a second frequency point; wherein, the first frequency point and the second frequency point meet the configuration condition that the ratio of the square of the minimum frequency point to the product of the maximum frequency point and the target bandwidth is close to 1. The minimum frequency point is the minimum frequency point among the first frequency point, the second frequency point, and the absolute value frequency point of the difference between the second frequency point and the first frequency point. The maximum frequency point is the maximum frequency point among the first frequency point, the second frequency point, and the absolute value frequency point of the difference. The target bandwidth is the maximum value of the first bandwidth occupied by the first frequency point and the second bandwidth occupied by the second frequency point.

[0027] In an alternative manner, the first frequency point and the second frequency point satisfy the following formula:

[0028]

[0029] Among them, min{f} is the minimum frequency point, max{f} is the maximum frequency point, B is the target bandwidth, and δ is an error threshold parameter, and the value range of δ is [0, 0.15].

[0030] In an alternative manner, there are multiple pairs of first frequency points and second frequency points that meet the formula requirements, and select The pair of frequency points corresponding to the minimum value of the value is used as the first frequency point and the second frequency point for sending the sensing signal.

[0031] In an alternative manner, the receiver also receives an indication message from an operation node, and the indication message is used to indicate the first frequency point and the second frequency point.

[0032] In an alternative manner, the receiver also sends a first notification message to the transmitter, and the first notification message is used to indicate a configuration condition, and the configuration condition is used for the transmitter to determine the first frequency point and the second frequency point.

[0033] In an alternative manner, the receiver also receives a second notification message from the transmitter, and the second notification message is used to indicate configuration conditions; the first frequency point and the second frequency point are determined according to the configuration conditions.

[0034] In a fourth aspect, an embodiment of the present application provides a communication device, and the communication device may be an operation node, a sensing node, or a reference node. The communication device has the functions of implementing the above first aspect to the third aspect. For example, the communication device includes modules, units, or means corresponding to the steps involved in the above first aspect to the third aspect. The functions, units, or means may be implemented by software, or by hardware, or by hardware executing corresponding software.

[0035] In a possible design, the communication device includes a processing unit and a transceiver unit. The transceiver unit may be used to transmit and receive signals to achieve communication between the communication device and other devices; the processing unit may be used to perform some internal operations of the communication device. The transceiver unit may be referred to as an input / output unit, a communication unit, etc., and the transceiver unit may be a transceiver; the processing unit may be a processor. When the communication device is a module (such as a chip) in a communication device, the transceiver unit may be an input / output interface, an input / output circuit, or input / output pins, etc., and may also be referred to as an interface, a communication interface, or an interface circuit, etc.; the processing unit may be a processor, a processing circuit, or a logic circuit, etc.

[0036] In another possible design, the communication device includes a processor and may further include a transceiver. The transceiver is used to transmit and receive signals, and the processor executes program instructions to complete the methods in any possible design or implementation manner in the above first aspect to the third aspect. Among them, the communication device may further include one or more memories, and the memories are used to be coupled to the processor. The memories may store necessary computer programs or instructions for implementing the functions involved in the above first aspect to the third aspect. The processor may execute the computer programs or instructions stored in the memories. When the computer programs or instructions are executed, the communication device implements the methods in any possible design or implementation manner in the above first aspect to the third aspect.

[0037] In another possible design, the communication device includes a processor, and the processor may be used to be coupled to a memory. The memory may store necessary computer programs or instructions for implementing the functions involved in the above first aspect to the third aspect. The processor may execute the computer programs or instructions stored in the memory. When the computer programs or instructions are executed, the communication device implements the methods in any possible design or implementation manner in the above first aspect to the third aspect.

[0038] In yet another possible design, the communication device includes a processor and an interface circuit. The processor is configured to communicate with other devices via the interface circuit and execute the methods in any possible design or implementation manner of the above first aspect to third aspect.

[0039] It can be understood that in the above fourth aspect, the processor can be implemented by hardware or by software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor that implements by reading software code stored in a memory. In addition, the above processor can be one or more, and the memory can be one or more. The memory can be integrated with the processor, or the memory and the processor are separately arranged. In a specific implementation process, the memory can be integrated with the processor on the same chip, or can be separately arranged on different chips. The embodiments of the present application do not limit the type of the memory and the setting manner of the memory and the processor.

[0040] In a fifth aspect, an embodiment of the present application provides a communication system, which includes the transmitter and the receiver in the above first aspect.

[0041] In a sixth aspect, the present application provides a chip system, which includes a processor for implementing the method described in the above first aspect. Optionally, a memory can also be included. The chip system can be composed of chips, or can include chips and other discrete devices.

[0042] In a seventh aspect, the present application further provides a computer-readable storage medium, in which computer-readable instructions are stored. When the computer-readable instructions run on a computer, the computer is caused to execute the method executed by the transmitter or the method executed by the receiver in the first aspect.

[0043] In an eighth aspect, the present application provides a computer program product containing instructions, which when running on a computer, causes the computer to execute the method executed by the transmitter or the method executed by the receiver in the above first aspect.

[0044] For the technical effects that can be achieved by the above second aspect to eighth aspect, please refer to the technical effects that can be achieved by the corresponding possible design solutions in the above first aspect. The present application will not repeat them here. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 FIG. shows a schematic diagram of a communication system provided by an embodiment of the present application;

[0046] Figure 2 FIG. shows a schematic diagram of carrier phase ranging;

[0047] Figure 3 Shows a schematic diagram of a dual - base sensing node provided by an embodiment of the present application;

[0048] Figure 4 Shows a schematic diagram of a single - base sensing node provided by an embodiment of the present application;

[0049] Figure 5 Shows a schematic diagram of a search for integer ambiguity parameters;

[0050] Figure 6 Shows a schematic flow diagram of a target sensing method provided by an embodiment of the present application;

[0051] Figure 7A Shows a schematic diagram of a frequency point provided by an embodiment of the present application;

[0052] Figure 7B Shows a schematic diagram of a search for integer ambiguity parameters;

[0053] Figure 8 Shows a schematic flow diagram of a target sensing method provided by an embodiment of the present application;

[0054] Figure 9 Shows a schematic flow diagram of a target sensing method provided by an embodiment of the present application;

[0055] Figure 10 Shows a schematic flow diagram of a target sensing method provided by an embodiment of the present application;

[0056] Figure 11 Shows a schematic diagram of the structure of a communication device provided by an embodiment of the present application;

[0057] Figure 12 Shows a schematic diagram of the structure of a communication device provided by an embodiment of the present application;

[0058] Figure 13 Shows a schematic diagram of the structure of a communication device provided by an embodiment of the present application. Detailed implementation manners

[0059] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. The specific operation methods in the method embodiments can also be applied to the device embodiments or system embodiments. Among them, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more (including two). Therefore, the implementations of the device and the method can be referred to each other, and the repeated parts will not be described again.

[0060] The technical solution provided by the embodiments of the present application can be applied to a 5G system, or to future communication systems (such as 6G) or other similar communication systems. Additionally, the technical solution provided by the embodiments of the present application can be applied to cellular links, public land mobile networks (PLMNs), machine-to-machine (M2M) networks, Internet of Things (IoT) networks, or other networks. It can also be applied to links between devices, such as device-to-device (D2D) links. A D2D link can also be referred to as a sidelink, where the sidelink can also be referred to as a side link or a secondary link, etc. In the embodiments of the present application, the above terms all refer to links established between devices of the same type, and they have the same meaning. The so-called devices of the same type can be links between terminal devices, links between base stations, or links between relay nodes, etc. The embodiments of the present application do not limit this.

[0061] Figure 1 is a schematic diagram of a wireless communication system applicable to the present application. As Figure 1 shown, the wireless communication system may include at least one network device, such as network device 111, network device 112, and network device 113. The wireless communication system may also include at least one terminal device. For example, terminal device 121, terminal device 122, terminal device 123, terminal device 124, terminal device 125, terminal device 126, and terminal device 127. The communication method between network devices may be backhaul. For example, the communication method between network device 111 and network device 112, or the communication method between network device 111 and network device 113. The communication method between a network device and a terminal device may be enhanced mobile broadband (eMBB). For example, the communication method between network device 112 and terminal device 121. The communication method between a network device and a terminal device may be multi-site transmission. For example, the communication method between network device 112, network device 113, and terminal device 124. The communication method between terminal devices may be D2D. For example, the communication method between terminal device 122 and terminal device 125.

[0062] A terminal device can be a device capable of receiving scheduling and indication information from a network device, providing voice and / or data connectivity to a user, or a handheld device with a wireless connection function, or other processing device connected to a wireless modem. The terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN). For example, the terminal device can be a portable, pocket-sized, handheld, computer-integrated, or vehicle-mounted mobile device. The terminal device can also be referred to as a subscriber unit, subscriber station (SS), mobile station (MS), remote station, access point (AP), remote terminal, access terminal, user agent, customer premises equipment (CPE), terminal, user equipment (UE), mobile terminal (MT), etc. The terminal device can also be a wearable device. The terminal device can also be a device in a next-generation communication system. For example, a terminal device in a 5G network or a terminal device in a future evolved PLMN network, a terminal device in an NR communication system, etc.Currently, the terminal device can be: mobile phone, tablet computer, laptop computer, palmtop computer, customer-premises equipment (CPE), mobile internet device (MID), wearable device (such as smart watch, smart bracelet, pedometer, etc.), vehicle-mounted device (such as car, bicycle, electric vehicle, airplane, ship, train, high-speed rail, etc.), virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, smart home device (such as refrigerator, TV, air conditioner, electricity meter, etc.), intelligent robot, workshop device, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, or wireless terminal in smart home, flying device (such as intelligent robot, hot air balloon, drone, airplane), etc. The terminal device can also be other devices with terminal functions. For example, the terminal device can also be a device that serves as a terminal function in D2D communication.

[0063] A network device is an entity in the network side that is used to transmit or receive signals. For example, a transmission reception point (TRP), a gNB. The network device can be an AP in a wireless local area network (WLAN), a base transceiver station (BTS) in a global system for mobile communication (GSM) or code division multiple access (CDMA), a node B (NB) in a wideband code division multiple access (WCDMA), or an evolved node B (eNB or eNodeB) in a long term evolution (LTE). The network device can also be a relay station or an access point, or a vehicle-mounted device, a wearable device, and a network device in a 5G network, or a network device in a future evolved PLMN, or a gNodeB / gNB and other devices in an NR system. In some deployments, a gNB can include a CU and a DU. The CU implements some functions of the gNB, and the DU implements some functions of the gNB. Exemplarily, the CU is responsible for processing non-real-time protocols and services. For example, implementing radio resource control (RRC), service data adaptation protocol (SDAP) functions, packet data convergence protocol (PDCP) layer functions, etc. The DU is responsible for processing physical layer protocols and real-time services. For example, implementing radio link control (RLC) layer, medium access control (MAC) layer, and physical (PHY) layer functions, etc. The gNB can also include an active antenna unit (AAU). The AAU implements some physical layer processing functions, radio frequency processing, and related functions of active antennas. Since the information of the RRC layer will ultimately become the information of the PHY layer, or, conversely, the information of the PHY layer is transformed from the information of the RRC layer. Therefore, in this architecture, high-layer signaling (such as RRC layer signaling) can also be considered to be sent by the DU, or, sent by the DU and the AAU. It can be understood that the network device can be a device including one or more of a CU node, a DU node, and an AAU node.In addition, the CU may be a network device in a radio access network (RAN), or the CU may be a network device in a core network (CN). This application does not make any limitations in this regard. Additionally, in the embodiments of this application, the network device provides services for a cell, and the terminal device communicates with the network device through the transmission resources used by this cell (for example, frequency domain resources, or in other words, spectrum resources). This cell may be the cell corresponding to the network device (such as a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. Exemplarily, small cells may include: Metro cells, Micro cells, Picocells, Femto cells, etc. Since small cells have the characteristics of a small coverage range and low transmit power, small cells can provide high-rate data transmission services. In addition, in other possible cases, the network device may be other devices that provide wireless communication functions for terminal devices. The embodiments of this application do not make any limitations on the specific technologies and specific device forms adopted by the network device. For example, in an open radio access network (ORAN) system, the CU may also be referred to as an O-CU (open CU), the DU may also be referred to as an O-DU, the CU-CP may also be referred to as an O-CU-CP, the CU-UP may also be referred to as an O-CU-UP, and the RU may also be referred to as an O-RU. For ease of description, this application uses the CU, CU-CP, CU-UP, DU, and RU as examples for description. Any one of the CU (or CU-CP, CU-UP), DU, and RU in this application may be implemented through a software module, a hardware module, or a combination of a software module and a hardware module.

[0064] To better illustrate the solutions of this application, the following explains the technical terms involved in this application:

[0065] 1) Integer ambiguity parameter

[0066] Related technologies have proposed a carrier phase ranging scheme that uses the carrier frequency and phase information in the transmitted signal to calculate the propagation distance of the signal. As Figure 2 shown, after the signal is transmitted by the transmitter (Tx), it reaches the target object. After being reflected by the target object, the signal is received by the receiver (Rx). The actual distance d traveled by the signal satisfies the following formula 1:

[0067]

[0068] Wherein, f is the carrier frequency; N is a positive integer, that is, the number of wavelengths of the signal transmitted from the transmitter to the receiver; Φ is the phase measured after the receiver receives the signal; c is the speed of light. However, since N is unknown, d cannot be determined, that is, the uncertainty of the integer ambiguity parameter leads to the uncertainty of d. Here, N can be defined as the integer ambiguity parameter.

[0069] 2) Sensing node

[0070] The sensing node can also be called an induction node, a signal detection node, or a sensing device, etc., which is not specifically limited herein. The sensing node can be the above-mentioned terminal device or network device, which is not specifically limited herein. The sensing node is used to assist the operation node in positioning the sensing target. When assisting in positioning the sensing target, multiple sensing nodes are usually used (usually at least 3 sensing nodes are required).

[0071] The sensing nodes are divided into bistatic sensing nodes and monostatic sensing nodes. Among them, the bistatic sensing node includes two sensing devices. After one sensing device (which can be called a signal transmitting sensing node or a transmitter) transmits a signal and is reflected by the sensing target, the other sensing device (which can be called a signal receiving sensing node or a receiver) receives the signal to obtain the sensing result. Among them, the monostatic sensing node includes 1 sensing device. After the transmitting end of the sensing device (which can also be called a transmitter) transmits a signal and is reflected by the sensing target, the receiving end of the sensing device (which can also be called a receiver) receives the reflected signal to obtain the sensing result. Among them, the sensing result includes: information such as the signal transmission distance, the relative motion speed of the sensing target, the angle of the sensing target relative to the antenna receiving array (that is, the antenna receiving array of the signal receiving sensing node in the sensing node), or the signal strength, etc. This is only an exemplary description herein and is not specifically limited. It should be noted that in this application, the bistatic sensing node is understood as one sensing node, and the monostatic sensing node is also understood as one sensing node.

[0072] The schematic diagram of the bistatic sensing node can be referred to Figure 3 for understanding. Figure 3 In (a) shows that the sensing target in the sensing area is a car, the sensing node transmitting the signal is a base station, and the sensing node receiving the signal is a UE. After the base station transmits a signal, a reflected signal is obtained after being reflected by the car, and the reflected signal is received by the UE to obtain the sensing result. Figure 3 In (b) shows that the sensing target in the sensing area is a car, the sensing node transmitting the signal is a UE, and the sensing node receiving the signal is a base station. After the UE transmits a signal, a reflected signal is obtained after being reflected by the car, and the reflected signal is received by the base station to obtain the sensing result. Figure 3In (c), the sensed target within the sensing area is a vehicle, the sensing node that emits the signal is Base Station 1, and the sensing node that receives the signal is Base Station 2. After Base Station 1 emits the signal, the reflected signal is obtained after reflection by the vehicle, and the reflected signal is received by Base Station 2 to obtain the sensing result. Figure 3 In (d), the sensed target within the sensing area is a vehicle, the sensing node that emits the signal is UE1, and the sensing node that receives the signal is UE2. After UE1 emits the signal, the reflected signal is obtained after reflection by the vehicle, and the reflected signal is received by UE2 to obtain the sensing result. Figure 3 In (e), the sensing node needs to receive an instruction from the control device before it can emit a signal. Here, the control end is the base station, the sensing node that emits the signal is UE1, the sensing node that receives the signal is UE2, and the sensed target within the sensing area is a vehicle. After the base station sends a signal emission instruction to UE1, UE1 emits the signal, the reflected signal is obtained after reflection by the vehicle, and the reflected signal is received by UE2. UE2 reports the sensing result based on the indication of the base station. Figure 3 In (f), the sensing node needs to receive an instruction from the control device before it can emit a signal. Here, the control end is Base Station 3, the sensing node that emits the signal is Base Station 1, the sensing node that receives the signal is Base Station 2, and the sensed target within the sensing area is a vehicle. After Base Station 3 sends a signal emission instruction to Base Station 1, Base Station 1 emits the signal, the reflected signal is obtained after reflection by the vehicle, and the reflected signal is received by Base Station 2. Base Station 2 reports the sensing result based on the indication of Base Station 3.

[0073] The schematic diagram of the single-base sensing node can be referred to Figure 4 for understanding. Figure 4 In (a), the sensed target within the sensing area is a vehicle, and the sensing node is the base station. After the base station emits the signal, the reflected signal is obtained after reflection by the vehicle, and the reflected signal is received again by the base station to obtain the sensing result. Figure 4 In (b), the sensed target within the sensing area is a vehicle, and the sensing node is the UE. After the UE emits the signal, the reflected signal is obtained after reflection by the vehicle, and the reflected signal is received again by the UE to obtain the sensing result.

[0074] 4) Operating node

[0075] The operation node may also be referred to as a control node, a processing node, a control device, a processing device, etc., and is not specifically limited herein. The operation node may be the above-mentioned terminal device or network device, which is not specifically limited herein. The operation node may be a device different from the sensing node, or may be one of the multiple sensing nodes, which is not specifically limited herein. For example, in the scenario of sensing target positioning, one of the multiple single-base sensing nodes is used as the operation node. Or, in the scenario of sensing target positioning, the signal transmitting sensing node (i.e., the transmitter) in one of the multiple bistatic sensing nodes is used as the operation node. Or, in the scenario of sensing target positioning, the signal receiving sensing node (i.e., the receiver) in one of the multiple bistatic sensing nodes is used as the operation node.

[0076] Through the above description, in the premise of no prior information, when using the carrier phase ranging scheme to determine the position of the target object, the integer ambiguity parameter N may be any positive integer. If the matched filter ranging scheme is used (the basic principle of matched filter ranging is to use the autocorrelation function of the signal to determine the propagation delay of the signal, so as to calculate the distance traveled by the signal. The specific steps include: 1) The transmitter sends a short pulse signal (referred to as the detection signal); 2) The receiver receives the signal reflected by the target object; 3) The receiver performs matched filtering on the received signal and the original detection signal to obtain an autocorrelation function; 4) The peak of the autocorrelation function corresponds to the propagation delay of the signal; 5) The distance traveled by the signal is calculated through the known signal speed and delay to determine the position of the target object (i.e., the matched filter result). As a reference, searching for possible integer ambiguity parameters near the matched filter result can reduce the search complexity of the integer ambiguity parameter. It can be understood with reference to the following formula 2:

[0077] It can be understood with reference to Equation 2 below:

[0078]

[0079] Among them, d represents the actual distance traveled by the signal after being reflected by the target object and received by the receiver (Rx), d MF represents the signal propagation distance determined by using the matched filter ranging scheme to range the target object, w MF represents the measurement error of the matched filter ranging scheme. λ represents the wavelength, represents the measurement distance of the carrier phase ranging without the integer ambiguity part, Φ represents the phase measured by the receiver after receiving the signal when using the carrier phase ranging, m represents the integer modulus parameter, w represents the measurement error of the carrier phase ranging scheme. It should be noted that ‖w MF‖w‖² >> ‖w₁‖², ‖w‖² >> ‖w₂‖². For carrier phase ranging using a single carrier, the search complexity is Δr / λ, where Δr = c / B, c represents the speed of light, B represents the signal bandwidth, and for a single carrier, B is the bandwidth occupied by the frequency point of the single carrier. Taking a 10 GHz carrier as an example, with a wavelength of 3 cm and a ranging error of 3 m, within a 3 m error range, with a wavelength of 3 cm as the period, m has 100 possible values, and the search space for the integer cycle modulus parameter is still relatively large.

[0080] Referring to the following formula 3 shows the ranging results of carrier ranging using dual carriers (carrier phase ranging using carrier 1 and carrier 2 respectively) and the ranging results of matched filtering:

[0081]

[0082] where d, d MF and w MF can be understood with reference to the description of the above formula 2 and will not be elaborated here. λ₁ represents the wavelength of carrier 1, represents the measured distance of carrier phase ranging without the integer cycle ambiguity part when performing carrier phase measurement based on carrier 1, Φ₁ represents the phase measured by the receiver after receiving the signal when performing carrier phase ranging using carrier 1, m₁ represents the integer cycle modulus parameter for carrier phase measurement based on carrier 1, and w₁ represents the measurement error of the phase ranging of the carrier based on carrier 1. λ₂ represents the wavelength of carrier 2, represents the measured distance of carrier phase ranging without the integer cycle ambiguity part when performing carrier phase measurement based on carrier 2, Φ₂ represents the phase measured by the receiver after receiving the signal when performing carrier phase ranging using carrier 2, m₂ represents the integer cycle modulus parameter for carrier phase measurement based on carrier 2, and w₂ represents the measurement error of the phase ranging of the carrier based on carrier 2. It should be noted that ‖w MF ‖² >> ‖w₁‖², ‖w MF ‖² >> ‖w₂‖². For carrier phase ranging using dual carriers, the search complexity is Δr / λ₁ + λ₁ / λ₂, where Δr = c / B, c represents the speed of light, B represents the signal bandwidth, and for dual carriers, B is the maximum value of the bandwidth occupied by the frequency points of the dual carriers.

[0083] It should be noted that two frequency points can form a virtual carrier, and the frequency point fv of the virtual carrier can be understood with reference to formula 4:

[0084] f v = |f₂ - f₁| Formula 4

[0085] where f v represents the carrier frequency of the virtual carrier, f₁ represents the frequency point of carrier 1, and f₂ represents the frequency point of carrier 2.

[0086] After that, the generated virtual carrier and the actual carrier are combined together. The measurement equation can be understood with reference to Formula 5:

[0087]

[0088] Among them, d, d MF , w MF w MF , a1, a2, λ1, λ2, m1, m2, w1, w2 can be understood with reference to the description of the above Formula 2 and will not be elaborated here. λ v represents the wavelength of the virtual carrier, represents the measured distance of carrier phase ranging without the integer ambiguity part when performing carrier phase measurement based on the virtual carrier, Φv represents the phase measured by the receiver after receiving the signal when performing carrier phase ranging using the virtual carrier, m1 represents the integer modulus parameter of carrier phase measurement based on the virtual carrier, w v represents the measurement error of carrier phase ranging of the carrier based on the virtual carrier. It should be noted that ‖w MF ‖2 >> ‖w1‖2, ‖w MF ‖2 >> ‖w2‖2, ‖w MF ‖2 >> ‖w v ‖2. For carrier phase ranging using dual carriers and virtual carriers, the search complexity is Δr / λ v + λ v / λ2 (assuming the carrier frequency of carrier 2 is greater than that of carrier 1), where Δr = c / B, c represents the speed of light, B represents the signal bandwidth, and for dual carriers and virtual carriers, B is the maximum value of the bandwidth occupied by the frequency points of dual carriers and virtual carriers.

[0089] Figure 5 shows a schematic diagram of searching for integer ambiguity parameters in carrier phase ranging using dual carriers and virtual carriers. The initial ranging result is obtained by using matched filter ranging, and the first search range Δr is determined. Then, search is performed within the first search range with a step size of the wavelength λ v of the virtual carrier. Finally, the second search range λ v is determined based on the carrier ranging result of the virtual carrier, and search is performed within the second search range with a step size of the wavelength λ2 of carrier 2 (assuming the carrier frequency of carrier 2 is greater than that of carrier 1) to determine the integer ambiguity parameter.

[0090] However, the device for ranging may support multiple carrier frequencies for carrier phase ranging. How to select frequency points to construct virtual carriers to reduce the search complexity of integer ambiguity parameters is not addressed by the related technologies.

[0091] Based on this, the present application provides a target perception method to reduce the search complexity of the integer ambiguity parameter. Refer to Figure 6 This method can be executed through the interaction between the transmitter and the receiver. Among them, the transmitter or the receiver can be a terminal device, a network device, a chip or a circuit. Optionally, the chip can be a chip in the terminal device, and the circuit can be a circuit in the terminal device. Optionally, the chip can also be a chip in the network device, and the circuit can also be a circuit in the network device. Among them, the transmitter can be the signal transmitting and perceiving node in the above bistatic perception node, and the receiver can be the signal receiving and perceiving node in the above bistatic perception node. The transmitter can also be the transmitting end in the above monostatic perception node, and the receiver can be the receiving end in the above monostatic perception node. The present application does not make any limitations in this regard. This method can be applied to a 5G communication system, a 5.5G or future 6G communication system. This method can also be applied to a non-terrestrial communication system, etc., and the present application does not make any limitations in this regard. Figure 6 Taking the transmitter, the receiver, and the perception target as an example, where the perception target can be a passive device that cannot transmit or receive signals but can reflect, diffract, or scatter signals, etc., and is not specifically limited here. For example, vehicles, trees, animals, etc. The perception target can also be an active device that can transmit and receive signals, such as a terminal device, a network device, etc. If the perception target is a passive device, the perception target can reflect, diffract, or scatter the perception signal transmitted by the transmitter and transmit the perception signal back to the receiver. The transmission distance of the perception signal is the total distance from the transmitter to the perception target and from the perception target to the receiver. If the perception target is an active device, the perception target can send the perception signal to the receiver, and the transmission distance of the perception signal is the distance from the perception target to the receiver, or the perception target receives the perception signal from the transmitter, and the transmission distance of the perception signal is the distance from the transmitter to the perception target. This is only an exemplary illustration here and is not specifically limited. Figure 6 Taking the perception target as a passive device and the perception target reflecting the perception signal as an example to illustrate. This method is executed as follows:

[0092] Step 601, the transmitter sends a perception signal at a first frequency point. Correspondingly, the perception target receives the perception signal and reflects the perception signal.

[0093] Step 602, the transmitter sends a perception signal at a second frequency point. Correspondingly, the perception target receives the perception signal and reflects the perception signal.

[0094] The execution order of the above step 601 and step 602 is not specifically limited. Step 602 can be executed first and then step 601, or step 601 can be executed first and then step 602.

[0095] Step 603, the receiver receives the perception signal at the first frequency point.

[0096] Step 604, the receiver receives the sensing signal at the second frequency point.

[0097] The execution order of the above steps 603 and 604 is not specifically limited. Step 603 can be executed first and then step 604, or step 604 can be executed first and then step 603.

[0098] Among them, the first frequency point and the second frequency point meet the configuration condition that the ratio of the square of the minimum frequency point to the product of the maximum frequency point and the target bandwidth is close to 1. The minimum frequency point is the minimum among the first frequency point, the second frequency point, and the absolute value frequency point of the difference between the second frequency point and the first frequency point. The maximum frequency point is the maximum among the first frequency point, the second frequency point, and the absolute value frequency point of the difference. The target bandwidth is the maximum of the first bandwidth occupied by the first frequency point and the second bandwidth occupied by the second frequency point.

[0099] Referring to the above carrier phase ranging using dual carriers and virtual carriers (which can be understood as the carrier corresponding to the absolute value frequency point of the difference between the second frequency point and the first frequency point), the search complexity of the integer ambiguity parameter is At When the value of is the smallest, the search complexity of the integer ambiguity parameter is the lowest. Based on this, considering it can be known that Furthermore, At The minimum value of the value of That is Furthermore, it can be known that Among them, Δr = c / B, It can be known that Since the two frequency points may not fully meet The error threshold parameter δ can be set. From this, it can be known that , where f2 is the maximum frequency point and f2 - f1 is the minimum frequency point. Based on this, the first frequency point and the second frequency point satisfy the following formula 6:

[0100]

[0101] Among them, min{f} is the minimum frequency point, max{f} is the maximum frequency point, B is the target bandwidth, δ is the error threshold parameter, and the value range of δ is [0, 0.15].

[0102] It should also be added that Figure 6 In related embodiments, the transmitter (or receiver) is a base station. Its processing operations can be executed by the CU, and the transceiver operations of the base station can be executed by the DU or RU; or, the processing operations of the base station can be executed by the CU-CP, and the transceiver operations of the base station can be executed by the DU or RU.

[0103] Taking the transmitter as the base station as an example, the CU can generate a sensing signal, and the CU can send the sensing signal to the DU. The DU can send the sensing signal to the sensing target, or the DU can send the sensing signal to the RU, and the RU sends it to the sensing target. For another example, the CU-CP can generate a sensing signal, and the CU-CP can send the sensing signal to the DU. The DU can send the sensing signal to the sensing target, or the DU can send the sensing signal to the RU, and the RU sends it to the sensing target.

[0104] Of course, the CU, DU, RU, and CU-CP can also perform other operations, which will not be exemplified one by one in this application.

[0105] Furthermore, in the O-RAN scenario, the operations performed by the above CU can be performed by the O-CU, the operations performed by the DU can be performed by the O-DU, the operations performed by the RU can be performed by the O-RU, and the operations performed by the CU-CP can be performed by the O-CU-CP.

[0106] It should be noted that the transmitter and receiver may support multiple frequency points, and there are multiple pairs of first frequency points and second frequency points among the multiple frequency points that satisfy the requirements of Formula 6. When determining the first frequency point and the second frequency point, one can select the pair of frequency points corresponding to the minimum value as the first frequency point and the second frequency point for sending the sensing signal. For example, frequency point 1 and frequency point 2 satisfy the requirements of the above Formula 6. By calculating it is 0.09; frequency point 3 and frequency point 4 satisfy the requirements of the above Formula 6. By calculating it is 0.05; frequency point 5 and frequency point 6 satisfy the requirements of the above Formula 6. By calculating it is 0.01; since 0.01 < 0.05 < 0.09, frequency point 5 and frequency point 6 are selected as the first frequency point and the second frequency point. Frequency point 5 can be used as the first frequency point and frequency point 6 as the second frequency point, or frequency point 6 can be used as the first frequency point and frequency point 5 as the second frequency point. This is not specifically limited here, but only for illustrative purposes.

[0107] For example, the first frequency point is f1 = 9 GHz, the first bandwidth occupied by the first frequency point is B1 = 100 MHz, the second frequency point is f2 = 10 GHz, the second bandwidth occupied by the second frequency point is B2 = 100 MHz, and the absolute value of the difference between the second frequency point and the first frequency point is the frequency point fv = 1 GHz (fv = f2 - f1). In this way, there are a total of three frequency points {1, 9, 10} GHz including the absolute value of the difference frequency point. As Figure 7A shown, min{f} = 1 GHz, max{f} = 10 GHz. At this time, Referring to Figure 7BIt can be known that a preliminary ranging result is obtained through matched filtering. The bandwidth of the matched filtering signal is 100 MHz, and the corresponding first search range Δr = 3 m. Based on the ranging result, a search for the integer ambiguity parameter is performed within Δr with a wavelength λv = 0.3 m. Further, based on the carrier ranging result corresponding to the absolute value frequency point of the difference, a more refined search is performed within the range of λv = 0.3 m with λ2 = 0.03 m.

[0108] In addition, to improve the data processing efficiency, the value ranges of the first frequency point and the second frequency point that meet the above configuration conditions can be pre-configured. The frequency points jointly supported by the transmitter and the receiver are within the pre-configured ranges of the first frequency point and the second frequency point, and the corresponding frequency points can be used as the first frequency point and the second frequency point. According to the frequency bands specified in 3GPP TS 38.104, when δ = 0.15, the candidate frequency bands in Table 1 below can meet the configuration conditions of this application. For example, if the frequency points jointly supported by the transmitter and the receiver are 870 MHz and 7100 MHz, 870 MHz is within the range of 869 MHz to 894 MHz, and 7100 MHz is within the range of 7000 MHz to 7125 MHz. Therefore, 870 MHz can be used as the first frequency point and 7100 MHz can be used as the second frequency point. If the frequency points jointly supported by the transmitter and the receiver are 6425 MHz (corresponding bandwidth is 30 MHz) and 7200 MHz (corresponding bandwidth is 40 MHz), although 6425 MHz can meet the requirements of the value range of the first frequency point, but 7200 + 520 is 7720 MHz which does not meet the requirements of the value range of the second frequency point. Therefore, 425 MHz (corresponding bandwidth is 30 MHz) and 7200 MHz (corresponding bandwidth is 40 MHz) cannot form a pair of the first frequency point and the second frequency point. This is only for illustrative purposes and is not specifically limited.

[0109] Table 1

[0110]

[0111] In this application, after the transmitter sends the sensing signal to the sensing target at the first frequency point and the second frequency point, the receiver receives the sensing signal after reflection by the sensing target, and obtains the carrier phase measurement results corresponding to the absolute value frequency points of the difference between the first frequency point and the second frequency point and between the second frequency point and the first frequency point. Then, based on the carrier phase measurement result and the matched filtering ranging result of the sensing target, the search space of the integer ambiguity parameter is determined. Since the first frequency point and the second frequency point meet the configuration condition that the ratio of the square of the minimum frequency point to the product of the maximum frequency point and the target bandwidth is close to 1, the search complexity of the integer ambiguity parameter is reduced.

[0112] In actual applications, even if the transmitter and receiver support multiple frequency points, it may not be possible to meet the above configuration conditions. Based on this, for any one of the multiple frequency points supported by the transmitter and receiver, when sorting the multiple frequency points in ascending order, as long as the multiple frequency points satisfy the following formula 7, the search complexity of the integer ambiguity parameter can be ensured to be relatively low:

[0113]

[0114] Where B is the maximum value of the occupied bandwidth of the multiple frequency points supported by the transmitter and receiver, δ is the error threshold parameter, and the value range of δ is [0, 0.15], f x is any one of the multiple frequency points supported by the transmitter and receiver, f n is the frequency point sorted after f x , and f n+1 is the frequency point sorted after f n .

[0115] For example, taking three frequency points as an example, f1 = 3.5 GHz, B1 = 100 MHz, f2 = 12 GHz, B2 = 100 MHz, f3 = 42 GHz, B3 = 1 GHz. B = max{B1, B2, B3} = 1 GHz. f1 / B = 3.5, f2 / f1 ≈ 3.42, f3 / f2 ≈ 3.5. Referring to the above formula 7, it can be known that 0.02 < 0.15, Based on this, it can be known that f1, f2, and f3 can meet the requirements of the above formula 7.

[0116] It should be noted that before performing step 601 to step 604, the transmitter and receiver need to determine the first frequency point and the second frequency point, and the first frequency point and the second frequency point meet the above configuration conditions. In one embodiment, the transmitter or receiver can receive an indication message from the operation node, and the indication message is used to indicate the first frequency point and the second frequency point. Based on this, the data calculation amount of the transmitter or receiver can be reduced, and the sensing efficiency can be improved. In an optional manner, the receiver sends a first notification message to the transmitter, and correspondingly, the receiver receives the first notification message, and the first notification message is used to indicate the configuration conditions; the transmitter determines the first frequency point and the second frequency point according to the configuration conditions. Based on this, the data calculation amount of the transmitter can be reduced, and the data processing efficiency of the transmitter can be improved. In an optional manner, the transmitter sends a second notification message to the receiver, and correspondingly, the receiver receives the second notification message, and the second notification message is used to indicate the configuration conditions, and the configuration conditions are used for the receiver to determine the first frequency point and the second frequency point. Based on this, the data calculation amount of the receiver can be reduced, and the data processing efficiency of the receiver can be improved. Next, refer to Figures 8 - 10 and illustrate by cases.

[0117] Case 1 The operation node sends an indication message, and the indication message is used to indicate a first frequency band and a second frequency band

[0118] Refer to Figure 8 This method can be executed through the interaction of a transmitter, a receiver, and an operation node. The method is executed as follows:

[0119] Step 801A, the operation node sends a query request message to the transmitter, and the query request message is used to request the frequency band information of carrier ranging supported by the transmitter. Accordingly, the transmitter receives the query request message.

[0120] Step 801B, the operation node sends a query request message to the receiver, and the query request message is used to request the frequency band information of carrier ranging supported by the receiver. Accordingly, the receiver receives the query request message.

[0121] The execution order of the above step 801A and step 801A is not limited. Step 801A can be executed first and then step 801B, or step 801B can be executed first and then step 801A.

[0122] Step 802A, the transmitter sends a query request response message to the operation node, and the query request response message includes the frequency band information supported by the transmitter. Accordingly, the operation node receives the query request response message.

[0123] Optionally, the query request response message further includes: the bandwidth occupied by the frequency band supported by the transmitter.

[0124] Step 802B, the receiver sends a query request response message to the operation node, and the query request response message includes the frequency band information supported by the receiver. Accordingly, the operation node receives the query request response message.

[0125] Optionally, the query request response message further includes: the bandwidth occupied by the frequency band supported by the receiver.

[0126] The execution order of the above step 802A and step 802A is not limited. Step 802A can be executed first and then step 802B, or step 802B can be executed first and then step 802A.

[0127] Step 803, the operation node determines indication information, and the indication information indicates a first frequency band, a second frequency band, and a target bandwidth that meet the configuration conditions.

[0128] Specifically, the operation node determines the frequency band information of carrier ranging jointly supported by the transmitter and the receiver according to the query request response message. Select the first frequency band, the second frequency band, and the target bandwidth that meet the configuration conditions introduced above in the frequency band information as the indication information. Figure 6 as the indication information.

[0129] Step 804, the operation node sends indication information to the transmitter.

[0130] Step 805, the operation node sends indication information to the receiver.

[0131] The execution order of the above steps 804 and 805 is not limited. Step 804 can be executed first and then step 805, or step 805 can be executed first and then step 804.

[0132] Step 806, the transmitter sends a sensing signal to the sensing target according to the indication information.

[0133] Specifically, the transmitter sends the sensing signal at a first frequency point and sends the sensing signal at a second frequency point.

[0134] Step 807, the receiver receives the sensing signal transmitted by the sensing target according to the indication information and determines the carrier phase ranging information.

[0135] Specifically, the receiver receives the sensing signal at a first frequency point and receives the sensing signal at a second frequency point.

[0136] Step 808, the receiver feeds back the carrier phase ranging information to the operation node.

[0137] Optionally, the carrier phase ranging information includes: a plurality of carrier measurement phase values obtained by measuring the sensing target at different times, a carrier measurement phase difference obtained by measuring the sensing target at adjacent times, a signal transmission distance value obtained by measuring the sensing target with the sensing signal at different times, a signal transmission delay value obtained by measuring the sensing target with the sensing signal at different times, a candidate value of the integer ambiguity parameter, or a candidate interval of the integer ambiguity parameter. For example, a candidate value of the integer ambiguity parameter estimated by the receiver based on experience, or a candidate value of the integer ambiguity parameter estimated by the receiver based on the matching value determined by the matched filtering of the sensing target, is only illustrated here. The matching value determined by the receiver for the matched filtering of the sensing target and the change range corresponding to the matching value. Among them, the change range can be a value determined by adding the change interval to the matching value. For example, the matching value is A, and the change interval is -∝~+∝, then the change range is A-∝~A+∝. Among them, the change range is a specific change interval. For example, the matching value is A, and the change range is -∝~+∝. Based on this, it can be known that the candidate parameter of the integer ambiguity is determined between A-∝~A+∝. Among them, ∝ is an error parameter.

[0138] Step 809, the operation node determines the integer ambiguity parameter according to the carrier phase ranging information.

[0139] Case 2 The receiver sends a first notification message to the transmitter, and the first notification message is used to indicate the configuration condition

[0140] Reference Figure 9 This method can be executed through the interaction between the transmitter and the receiver. The method is executed as follows:

[0141] Step 901, the receiver sends a query request message to the transmitter. This query request message is used to request the frequency point information of carrier ranging supported by the transmitter. Accordingly, the transmitter receives the query request message.

[0142] Step 902, the transmitter sends a query request response message to the receiver. This query request response message includes the frequency point information supported by the transmitter. Accordingly, the receiver receives the query request response message.

[0143] Optionally, the query request response message further includes: the bandwidth occupied by the frequency points supported by the transmitter.

[0144] Step 903, the receiver determines a first notification message. This first communication message is used to indicate the configuration conditions.

[0145] Optionally, the first notification message includes the configuration conditions (which can be understood by referring to the configuration conditions described above Figure 6 and the value of the error threshold parameter (i.e., δ in the above Figure 6 related descriptions). In addition, the receiver can also agree that when there are multiple pairs of first frequency points and second frequency points that meet the configuration conditions, select the pair of frequency points with the largest occupied bandwidth, and / or select the pair of frequency points with the smallest error threshold parameter.

[0146] Step 904, the receiver sends the first notification message to the transmitter.

[0147] Step 905, the transmitter determines the first frequency point, the second frequency point, and the target bandwidth according to the first notification message.

[0148] Step 906, the receiver determines the first frequency point, the second frequency point, and the target bandwidth according to the first notification message.

[0149] The execution order of the above step 905 and step 906 is not limited. Step 905 can be executed first and then step 906, or step 906 can be executed first and then step 905.

[0150] Step 907, the transmitter sends a sensing signal to the sensing target at the first frequency point and sends a sensing signal to the sensing target at the second frequency point.

[0151] Step 908, the receiver receives the sensing signal reflected by the sensing target at the first frequency point and receives the sensing signal reflected by the sensing target at the second frequency point.

[0152] Step 909, the receiver determines the integer ambiguity parameter according to the carrier phase ranging information.

[0153] Among them, the carrier phase ranging information can be understood with reference to step 808 above Figure 8 and will not be elaborated here.

[0154] Case 3 The transmitter sends a second notification message to the receiver, and the second notification message is used to indicate the configuration conditions

[0155] Refer to Figure 10 This method can be executed through the interaction between the transmitter and the receiver. The execution of this method is as follows:

[0156] Step 1001: The transmitter sends a query request message to the receiver, and the query request message is used to request the frequency point information of the carrier ranging supported by the receiver. Correspondingly, the receiver receives the query request message.

[0157] Step 1002: The receiver sends a query request response message to the transmitter, and the query request response message includes the frequency point information supported by the receiver. Correspondingly, the transmitter receives the query request response message.

[0158] Optionally, the query request response message further includes: the bandwidth occupied by the frequency points supported by the receiver.

[0159] Step 1003: The transmitter determines the second notification message.

[0160] Specifically, the transmitter determines the frequency point information of the carrier ranging jointly supported by the transmitter and the receiver according to the query request response message. Select the first frequency point, the second frequency point and the target bandwidth that meet the above Figure 6 introduced configuration conditions as the second notification message.

[0161] Step 1004: The transmitter sends the second notification message to the receiver.

[0162] Step 1005: The transmitter sends a sensing signal to the sensing target according to the second notification message.

[0163] Specifically, the transmitter sends the sensing signal at the first frequency point and the second frequency point.

[0164] Step 1006: The receiver receives the sensing signal transmitted by the sensing target according to the second notification message and determines the carrier phase ranging information.

[0165] Specifically, the receiver receives the sensing signal at the first frequency point and the second frequency point. Among them, the carrier phase ranging information can be understood with reference to step 808 above Figure 8 and will not be elaborated here.

[0166] Step 1007: The receiver feeds back the carrier phase ranging information to the transmitter.

[0167] Step 1008, the transmitter determines the integer ambiguity parameter according to the carrier phase ranging information.

[0168] The above mainly introduces the solution provided by the embodiments of the present application from the perspective of device interaction. It can be understood that, in order to implement the above functions, each device may include a corresponding hardware structure and / or software module for executing each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this article, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0169] The embodiments of the present application can divide the device into functional units according to the above method examples. For example, each functional unit can be divided corresponding to each function, or two or more functions can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0170] In the case of adopting an integrated unit, Figure 11 shows a possible exemplary block diagram of the communication device involved in the embodiments of the present application. As Figure 11 shown, the communication device 1100 may include: a processing unit 1101 and a transceiver unit 1102. The processing unit 1101 is used to control and manage the actions of the communication device 1100. The transceiver unit 1102 is used to support the communication between the communication device 1100 and other devices. Optionally, the transceiver unit 1102 may include a receiving unit and / or a sending unit, which are respectively used to perform receiving and sending operations. Optionally, the communication device 1100 may further include a storage unit, which is used to store the program code and / or data of the communication device 1100. The transceiver unit may be referred to as an input / output unit, a communication unit, etc. The transceiver unit may be a transceiver. The processing unit may be a processor. When the communication device is a module (such as a chip) in a communication device, the transceiver unit may be an input / output interface, an input / output circuit or an input / output pin, etc. The transceiver unit may also be referred to as an interface, a communication interface or an interface circuit, etc. The processing unit may be a processor, a processing circuit or a logic circuit, etc. Exemplarily, the communication device may be the above-mentioned transmitter or receiver, etc.

[0171] The communication device may be the terminal device in the above embodiments. For example, a terminal device or a communication module in a terminal device, or a circuit or chip in a terminal device responsible for communication functions.

[0172] In a possible design, when the communication device 1100 is a terminal device or a communication module in a terminal device, the functions of the processing unit 1101 can be implemented by one or more processors. Specifically, the processor may include a Modem chip, or a system-on-chip (SoC) chip or a SIP chip that includes a Modem core. The functions of the transceiver unit 1102 can be implemented by a transceiver circuit.

[0173] In a possible design, when the communication device 1100 is a circuit or chip responsible for communication functions in a terminal device, such as a Modem chip, or a system-on-chip (SoC) chip or a SIP chip that includes a Modem core, the functions of the processing unit 1101 can be implemented by a circuit system including one or more processors or processor cores in the above-mentioned chips. The functions of the transceiver unit 1102 can be implemented by an interface circuit or a data transceiver circuit on the above-mentioned chips.

[0174] When the above communication device is a module applied to a base station, the base station module implements the functions of the base station in the above method embodiments. The base station module receives information from other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the UE to the base station; or, the base station module sends information to other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the base station to the UE. The base station module here may be a baseband chip of the base station, or a DU or other modules, and the DU here may be an O-DU in an O-RAN architecture.

[0175] In an embodiment, the communication device 1100 is a transmitter. Among them, the transceiver unit 1102 is used to send a sensing signal at a first frequency point; send a sensing signal at a second frequency point; where the first frequency point and the second frequency point meet the configuration condition that the ratio of the square of the minimum frequency point to the product of the maximum frequency point and the target bandwidth is close to 1. The minimum frequency point is the minimum of the first frequency point, the second frequency point, and the absolute value frequency point of the difference between the second frequency point and the first frequency point. The maximum frequency point is the maximum of the first frequency point, the second frequency point, and the absolute value frequency point of the difference. The target bandwidth is the maximum of the first bandwidth occupied by the first frequency point and the second bandwidth occupied by the second frequency point.

[0176] In an alternative manner, the first frequency point and the second frequency point satisfy the following formula:

[0177]

[0178] where min{f} is the minimum frequency point, max{f} is the maximum frequency point, B is the target bandwidth, δ is an error threshold parameter, and the value range of δ is [0, 0.15].

[0179] In an alternative manner, there are multiple pairs of a first frequency point and a second frequency point that satisfy the formula requirements, and the processing unit 1101 is configured to select the pair of frequency points corresponding to the minimum value of the

[0180] as the first frequency point and the second frequency point for sending the sensing signal.

[0181] In an alternative manner, the transceiver unit 1102 is further configured to receive an indication message from an operation node, and the indication message is used to indicate the first frequency point and the second frequency point.

[0182] In an alternative manner, the transceiver unit 1102 is further configured to receive a first notification message from a receiver, and the first notification message is used to indicate a configuration condition; the processing unit 1101 is configured to determine the first frequency point and the second frequency point according to the configuration condition.

[0183] In another embodiment, the communication device 1100 is a receiver. Among them, the transceiver unit 1102 is configured to receive a sensing signal at the first frequency point; receive a sensing signal at the second frequency point; where the first frequency point and the second frequency point meet the configuration condition that the ratio of the square of the minimum frequency point to the product of the maximum frequency point and the target bandwidth is close to 1. The minimum frequency point is the minimum value among the first frequency point, the second frequency point, and the absolute value of the difference between the second frequency point and the first frequency point, the maximum frequency point is the maximum value among the first frequency point, the second frequency point, and the absolute value of the difference, and the target bandwidth is the maximum value between the first bandwidth occupied by the first frequency point and the second bandwidth occupied by the second frequency point.

[0184] In an alternative manner, the first frequency point and the second frequency point satisfy the following formula:

[0185]

[0186] where min{f} is the minimum frequency point, max{f} is the maximum frequency point, B is the target bandwidth, δ is an error threshold parameter, and the value range of δ is [0, 0.15].

[0187] In an alternative manner, there are multiple pairs of a first frequency point and a second frequency point that satisfy the formula requirements, and the processing unit 1101 is configured to select the pair of frequency points corresponding to the minimum value of the

[0188] as the first frequency point and the second frequency point for sending the sensing signal.

[0189] In an alternative manner, the transceiver unit 1102 is further configured to send a first notification message to the transmitter, where the first notification message is used to indicate a configuration condition, and the configuration condition is used by the transmitter to determine a first frequency point and a second frequency point.

[0190] In an alternative manner, the transceiver unit 1102 is further configured to receive a second notification message from the transmitter, where the second notification message is used to indicate a configuration condition; the processing unit 1101 is configured to determine the first frequency point and the second frequency point according to the configuration condition.

[0191] As Figure 12 shown, it is a schematic structural diagram of a simplified terminal device provided by this application. For the convenience of understanding and by way of illustration, Figure 12 in this Figure 12 example, the terminal device takes a mobile phone as an example. As

[0192] shown, the terminal device includes a processor system, a memory, a radio frequency circuit, an antenna, and an input / output device.

[0193] The memory is mainly used to store software programs and data.

[0194] The radio frequency circuit is mainly used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals.

[0195] The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves.

[0196] The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used to receive data input to the terminal device and output data from the terminal device.

[0197] It should be noted that some types of terminal devices may not have an input / output device.

[0198] When data needs to be sent, after the processor performs baseband processing on the data to be sent, it outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.

[0199] For ease of description, Figure 12 only one memory and one processor are shown. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor or integrated with the processor. The embodiments of the present application do not limit this.

[0200] In the embodiments of the present application, an antenna and a radio frequency circuit with transceiver functions may be regarded as the transceiver unit of the terminal device, and a processor with processing functions may be regarded as the processing unit of the terminal device.

[0201] As Figure 12 shown, the terminal device 1200 includes a transceiver unit 1210 and a processing unit 1220. The transceiver unit 1210 may also be referred to as a transceiver, a transceiver machine, a transceiver device, etc. The processing unit 1220 may also be referred to as a processor, a processing single board, a processing module, a processing device, etc.

[0202] Optionally, the devices in the transceiver unit 1210 for implementing the receiving function may be regarded as the receiving unit, and the devices in the transceiver unit 1210 for implementing the sending function may be regarded as the sending unit, that is, the transceiver unit 1210 includes a receiving unit and a sending unit. The transceiver unit may sometimes also be referred to as a transceiver machine, a transceiver, or a transceiver circuit, etc. The receiving unit may sometimes also be referred to as a receiver, a receiver machine, or a receiving circuit, etc. The sending unit may sometimes also be referred to as a transmitter, a transmitter machine, or a transmitting circuit, etc.

[0203] It should be understood that the transceiver unit 1210 is used to perform the sending operation and the receiving operation of the terminal device in the above method embodiments, and the processing unit 1220 is used to perform other operations of the terminal device except the transceiver operation in the above method embodiments.

[0204] The present application also provides a network device. As Figure 13 shown, it is a schematic structural diagram of the network device 1300 provided by the embodiments of the present application. The network device 1300 can be applied to a system as Figure 1 shown. For example, the network device 1300 may be a network device in the Figure 1 system, and is used to perform the functions of the network device in the above method embodiments. It should be understood that the following is only an example. In future communication systems, the network device may have other forms and compositions.

[0205] For example, in a 5G communication system, the network device 1300 may include a CU, a DU, and an AAU. Compared with the network device in an LTE communication system, which consists of one or more radio frequency units (such as remote radio units (RRUs)) and one or more indoor baseband processing units (building baseband units (BBUs)):

[0206] The non-real-time part of the original BBU will be split out and redefined as the CU, which is responsible for processing non-real-time protocols and services. Some physical layer processing functions of the BBU, together with the original RRU and passive antenna, are combined into the AAU, and the remaining functions of the BBU are redefined as the DU, which is responsible for processing physical layer protocols and real-time services. In short, the CU and DU are distinguished by the real-time nature of the processed content, and the AAU is a combination of the RRU and the antenna.

[0207] The CU, DU, and AAU can be deployed separately or co-located. Therefore, there will be various network deployment forms. One possible deployment form is as Figure 13 shown, which is the same as the traditional 4G network device, and the CU and DU are co-deployed on the same hardware. It should be understood that Figure 13 this is only an example and does not limit the protection scope of the present application. For example, the deployment form can also be that the DU is deployed in the BBU computer room, the CU is centrally deployed or the DU is centrally deployed, and the CU is more highly centralized, etc.

[0208] The AAU 1400 can implement the transceiver function corresponding to the transceiver unit 1102 in Figure 11 . Optionally, the AAU 1400 can also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and it can include at least one antenna 1401 and a radio frequency unit 1402. Optionally, the AAU 1400 can include a receiving unit and a transmitting unit. The receiving unit can correspond to a receiver (or a receiver, a receiving circuit), and the transmitting unit can correspond to a transmitter (or a transmitter, a transmitting circuit). The CU and DU 1500 can implement the internal processing function corresponding to the processing unit 1101 in Figure 11 . Optionally, the CU and DU 1500 can control the network device, etc., and can be called a controller. The AAU, CU, and DU can be physically set together or physically separated.

[0209] In addition, the network device is not limited to Figure 13 the form shown. It can also be other forms: for example, it includes a BBU and an adaptive radio unit (ARU), or includes a BBU and an AAU; it can also be a customer premises equipment (CPE), or other forms, which are not limited in the present application.

[0210] In one example, the CU and the DU 1500 may be composed of one or more single boards. The multiple single boards may jointly support a radio access network of a single access mode (such as an LTE network), or may separately support radio access networks of different access modes (such as an LTE network, a 5G network, a future network, or other networks). The CU and the DU 1500 further include a memory 1501 and a processor 1502. The memory 1501 is used to store necessary instructions and data. The processor 1502 is used to control the first network device to perform necessary actions, for example, to control the network device to execute the operation processes of the network device in the above method embodiments. The memory 1501 and the processor 1502 may serve one or more single boards. That is to say, a memory and a processor may be separately provided on each single board. Multiple single boards may also share the same memory and processor. In addition, necessary circuits may be provided on each single board.

[0211] It should be understood that Figure 13 the network device shown is capable of implementing Figure 6 the functions of the network device involved in the method embodiments. The operations and / or functions of each unit in the network device are respectively for implementing the corresponding processes executed by the network device in the method embodiments of the present application. To avoid repetition, the detailed description is appropriately omitted here. Figure 13 The structure of the exemplary network device is only one possible form and should not impose any limitation on the embodiments of the present application. The present application does not exclude the possibility of other forms of network device structures that may appear in the future.

[0212] The above CU and DU 1500 may be used to execute the actions implemented inside the network device described in the previous method embodiments, while the AAU 1400 may be used to execute the actions of the network device sending to or receiving from the terminal device described in the previous method embodiments. For details, please refer to the description in the previous method embodiments and will not be elaborated here.

[0213] The embodiments of the present application further provide a communication system, which includes a terminal device and a network device. Among them, the terminal device may be used as the transmitter in the above Figure 6 or may be used as the receiver in the above Figure 6 , which will not be elaborated here. In addition, the network device may be used as the transmitter in the above Figure 6 or may be used as the receiver in the above Figure 6 , which will not be elaborated here.

[0214] Based on the above embodiments, an embodiment of the present application further provides a readable storage medium storing instructions, which, when executed, implement the method in any of the above embodiments. The readable storage medium may include various media capable of storing program codes, such as a USB flash drive, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk, or an optical disc.

[0215] It should be noted that, without conflict, all or part of any feature in any embodiment of the present application can be freely combined. The combined technical solutions are also within the scope described in the present application.

[0216] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete 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 memory, compact disc read-only memory (CD-ROM), optical memory, etc.) containing computer-usable program code.

[0217] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices produce an apparatus for implementing the specified functions in Figure 1 one or more of the flows Figure 1 or blocks or combinations of blocks.

[0218] These computer program instructions can also be stored in a computer-readable memory capable of guiding the computer or other programmable data processing devices to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction apparatus that implements the specified functions in Figure 1 one or more of the flows Figure 1 or blocks or combinations of blocks.

[0219] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are executed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions for implementing the process Figure 1 a process or processes and / or blocks Figure 1 steps for implementing the functions specified in a block or blocks.

Claims

1. A target perception method, characterized in that, Including: Sending a sensing signal at a first frequency point; Sending the sensing signal at a second frequency point; Wherein, the first frequency point and the second frequency point meet the configuration condition that the ratio of the square of the minimum frequency point to the product of the maximum frequency point and the target bandwidth is close to 1. The minimum frequency point is the minimum frequency point among the first frequency point, the second frequency point, and the absolute value frequency point of the difference between the second frequency point and the first frequency point. The maximum frequency point is the maximum frequency point among the first frequency point, the second frequency point, and the absolute value frequency point of the difference. The target bandwidth is the maximum value between the first bandwidth occupied by the first frequency point and the second bandwidth occupied by the second frequency point.

2. The method according to claim 1, wherein The first frequency point and the second frequency point satisfy the following formula: Wherein, the min{f} is the minimum frequency point, the max{f} is the maximum frequency point, the B is the target bandwidth, the δ is an error threshold parameter, and the value range of δ is [0, 0.15].

3. The method according to claim 2, wherein There are multiple pairs of the first frequency point and the second frequency point that satisfy the formula requirements. Select the pair of frequency points corresponding to the smallest value as the first frequency point and the second frequency point for sending the sensing signal.

4. The method according to any one of claims 1-3, characterized in that, Further including: Receiving an indication message from an operation node, where the indication message is used to indicate the first frequency point and the second frequency point.

5. The method according to any one of claims 1 to 3, characterized in that, Further including: Receiving a first notification message from a receiver, where the first notification message is used to indicate the configuration condition; Determining the first frequency point and the second frequency point according to the configuration condition.

6. The method according to any one of claims 1-3, characterized in that, Further including: Sending a second notification message to a receiver, where the second notification message is used to indicate the configuration condition, and the configuration condition is used for the receiver to determine the first frequency point and the second frequency point.

7. A target perception method, characterized in that, Including: Receiving a sensing signal at a first frequency point; Receiving the sensing signal at a second frequency point; Wherein, the first frequency point and the second frequency point meet the configuration condition that the ratio of the square of the minimum frequency point to the product of the maximum frequency point and the target bandwidth is close to 1. The minimum frequency point is the minimum frequency point among the first frequency point, the second frequency point, and the absolute value frequency point of the difference between the second frequency point and the first frequency point. The maximum frequency point is the maximum frequency point among the first frequency point, the second frequency point, and the absolute value frequency point of the difference. The target bandwidth is the maximum value between the first bandwidth occupied by the first frequency point and the second bandwidth occupied by the second frequency point.

8. The method according to claim 7, characterized in that, The first frequency point and the second frequency point satisfy the following formula: Wherein, the min{f} is the minimum frequency point, the max{f} is the maximum frequency point, the B is the target bandwidth, the Y is an error threshold parameter, and the value range of δ is [0, 0.15].

9. The method according to claim 8, characterized in that, There are multiple pairs of the first frequency point and the second frequency point that satisfy the formula requirements. Select the pair of frequency points corresponding to the minimum value of as the first frequency point and the second frequency point for transmitting the sensing signal.

10. The method according to any one of claims 7-9, characterized in that Further including: Receiving an indication message from an operation node, where the indication message is used to indicate the first frequency point and the second frequency point.

11. According to the method described in any one of claims 7-9, characterized in that, Further including: Sending a first notification message to a transmitter, where the first notification message is used to indicate the configuration condition, and the configuration condition is used for the transmitter to determine the first frequency point and the second frequency point.

12. The method according to any one of claims 7-9, characterized in that, Further including: Receiving a second notification message from a transmitter, where the second notification message is used to indicate the configuration condition; Determining the first frequency point and the second frequency point according to the configuration condition.

13. A communication device, characterized in that, Including: Functional modules for implementing the method according to any one of claims 1 - 12.

14. A communication device, characterized in that, Including: At least one processor and a memory; The memory is configured to store computer programs or instructions; The at least one processor is configured to execute the computer programs or instructions, so that the method according to any one of claims 1-12 is performed.

15. A chip system, characterized in that, The chip system includes: a processing circuit; the processing circuit is coupled to a storage medium; The processing circuit is configured to execute some or all of the computer programs or instructions in the storage medium, and when the some or all of the computer programs or instructions are executed, is configured to implement the method according to any one of claims 1-12.

16. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions, and when the instructions are executed by a computer, the method according to any one of claims 1-12 is performed.

17. A computer program product comprising a computer program or instructions, characterized in that, When the computer programs or instructions are run on a computer, the method according to any one of claims 1-12 is performed.

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