WO2023051413A1

WO2023051413A1 - Network device, beamforming method, and wireless communication system

Info

Publication number: WO2023051413A1
Application number: PCT/CN2022/120997
Authority: WO
Inventors: 朱庆明; 孙绍峰; 高慧; 黄梅玉; 王琳琳; 倪爽; 樊高强
Original assignee: 华为技术有限公司
Priority date: 2021-09-30
Filing date: 2022-09-23
Publication date: 2023-04-06
Also published as: CN114039636A; CN114039636B

Abstract

Provided are a network device, a beamforming method, and a wireless communication system. A plurality of oscillator groups, which are connected to each first analog beamforming circuit in the network device, are arranged at intervals. Therefore, when each first analog beamforming circuit is configured to perform analog beamforming on an analog signal, a used analog weight value is an integer multiple of a phase difference of a digital weight value, such that a mixed weight value, which is formed after the analog weight value is superposed with the digital weight value, is a guide vector. Accordingly, signals emitted by M oscillator groups in the network device have relatively good directivity, and the effect of hybrid beamforming is improved.

Description

Network device, beamforming method and wireless communication system

This application claims the priority of the Chinese patent application with the application number 202111162992.4 and the title of the invention "Network Equipment, Beamforming Method and Wireless Communication System" filed on September 30, 2021, the entire contents of which are incorporated by reference in this application .

technical field

The present application relates to the field of communication technologies, and in particular to a network device, a beamforming method and a wireless communication system.

Background technique

A network device using multiple-input multiple-output (MIMO) technology usually includes multiple antennas. In order to avoid interference from multiple signals transmitted (or received) by the multiple antennas, it is necessary to perform multi-channel signal detection. Beamforming. Among them, beamforming refers to: adjusting the amplitude and phase of the multi-channel signal, making the multi-channel signal constructively interfere in some directions in space, and destructively interfere in other directions, so that the antenna transmits (or receives) ) signal is directional.

In related technologies, a network device may use a hybrid beamforming (hybrid beamforming, HBF) technology to perform beamforming on multiple signals. When using the HBF technology to perform beamforming, the network device can first perform digital beamforming on the signal to be transmitted in the digital domain, and convert the digital signal obtained by the digital beamforming into an analog signal. Afterwards, the network device may perform analog beamforming on the analog signal in the analog domain.

However, the beamforming effect of the above method is poor.

Contents of the invention

The present application provides a network device, a beamforming method and a wireless communication system, which can solve the technical problem of poor beamforming effect of HBF technology.

In one aspect, a network device is provided, and the network device includes: a baseband processing circuit, N first radio frequency processing circuits, at least one first analog beamforming circuit, and M dipole groups arranged along a first direction, each The dipole groups include at least one antenna dipole arranged along the second direction, the first direction intersects the second direction, and both N and M are integers greater than 1; the baseband processing circuit is used to perform digital beamforming on signals to be transmitted , and send the N digital signals obtained by digital beamforming to N first radio frequency processing circuits; each first radio frequency processing circuit is used to convert a received digital signal into an analog signal, and the N first The radio frequency processing circuit includes at least one first target radio frequency processing circuit; each first analog beamforming circuit is respectively connected to a first target radio frequency processing circuit and a plurality of dipole groups, and the first analog beamforming circuit is used for the first After analog beamforming, the analog signal transmitted by the target radio frequency processing circuit is transmitted to multiple oscillator groups connected to it; wherein, there is at least one oscillator between any two oscillator groups connected to each first analog beamforming circuit Group.

In the network device provided in the present application, the multiple dipole groups connected to each first analog beamforming circuit are set at intervals. Therefore, by setting the analog weights used by each first analog beamforming circuit to be an integer multiple of the difference between the digital weights when performing analog beamforming on the analog signals, the analog weights and digital weights can be superimposed to form The mixing weight of is the steering vector. Furthermore, the signals radiated by the M oscillator groups in the network device have better directivity, and the effect of hybrid beamforming is improved.

Optionally, the first analog beamforming circuit includes: a splitter and at least one analog phase shifter; the input end of the splitter is connected to the first target radio frequency processing circuit; the splitter has a first output end and At least one second output terminal, the first output terminal is connected to an oscillator group, each second output terminal is connected to an oscillator group through an analog phase shifter, and the splitter is used to simulate the transmission of the first target radio frequency processing circuit The signal is split; the analog phase shifter is used to perform analog beamforming on the analog signal transmitted by the splitter.

Since the first output terminal of the splitter is directly connected to one oscillator group, only the second output terminal needs to be connected to the oscillator group through an analog phase shifter, thus effectively reducing the analog phase shifting required in the first analog beamforming circuit number of devices. Furthermore, the structural complexity and cost of the first analog beamforming circuit can be effectively reduced on the basis of ensuring the effect of hybrid beamforming.

Optionally, the first analog beamforming circuit further includes: a bypass switch connected to the splitter; the baseband processing circuit is used to control the bypass switch to be in the first state or the second state; wherein, in the bypass switch When the bypass switch is in the first state, the splitter transmits analog signals to the first output terminal and at least one second output terminal respectively; when the bypass switch is in the second state, the splitter transmits analog signals to the first output terminal , and stop transmitting the analog signal to the at least one second output terminal.

Wherein, when the bypass switch is in the first state, the signal transmitted by the network device is a signal subjected to hybrid beamforming. When the bypass switch is in the second state, the signal transmitted by the network device is only subjected to digital beamforming. It can be seen that, by controlling the bypass switch to be in different states, the network equipment can process the signal to be transmitted in different beamforming manners, which effectively improves the flexibility of the network equipment.

Optionally, at least one first analog beamforming circuit has a plurality of candidate analog weight matrices; the baseband processing circuit is also used to: control at least one first analog beamforming circuit to adopt each candidate analog weight matrix in turn, for Analog beamforming is performed on the analog signal transmitted by the first target radio frequency processing circuit; after the analog beamforming is performed by using different alternative analog weight matrixes, the signal quality of the signals transmitted by the M oscillator groups is determined from multiple alternative analog weights A target analog weight matrix is determined in the matrix; and the analog weight matrix of at least one first analog beamforming circuit is configured as the target analog weight matrix.

The baseband processing circuit configures the phase shift of the analog phase shifters in the at least one first analog beamforming circuit using the target analog weight matrix. Thus, it can be ensured that after at least one first analog beamforming circuit uses the target analog weight matrix to perform analog beamforming, the signal quality of the signals transmitted by the M dipole groups is relatively good.

Optionally, if the first analog beamforming circuit further includes a bypass switch, the baseband processing circuit is also used to: if at least one bypass switch in the first analog beamforming circuit is controlled to be in the second state, the M dipoles If the signal quality of the signal transmitted by the group is higher than the signal quality when the target analog weight matrix is used, the bypass switch in the at least one first analog beamforming circuit is controlled to maintain the second state.

If the baseband processing circuit detects that the bypass switches are all in the second state and the signal quality of the signals transmitted by the M oscillator groups is better, it can control the bypass switch in the at least one first analog beamforming circuit to maintain the second state . At this time, the at least one first analog beamforming circuit no longer performs analog beamforming on the analog signal. In this way, it can be ensured that the signal quality of the signal sent by the network device is relatively good.

Optionally, the network device establishes a communication connection with multiple terminals; the baseband processing circuit is used to: for each terminal, based on the signal quality of the signal transmitted by the M oscillator groups for communicating with the terminal, select Determine the reference simulation weight matrix of the terminal in the simulation weight matrix; if the reference simulation weight matrix of at least two terminals is different, use one of the following methods to determine the target simulation weight matrix: the scheduling priority The reference simulation weight matrix of the terminal is determined as the target simulation weight matrix; according to the target polling sequence, the reference simulation weight matrix of each terminal is determined as the target simulation weight matrix in turn; or, if the reference simulation weight matrix of at least two terminals The weight matrixes are different, and the first analog beamforming circuit further includes a bypass switch, then the bypass switch in at least one first analog beamforming circuit is controlled to maintain the second state.

When a network device establishes a communication connection with a large number of terminals, if the baseband processing circuit can determine the reference analog weight matrix of the terminal with the highest scheduling priority as the target analog weight matrix, it can ensure that the terminal with the highest scheduling priority and the network device The signal quality of the communication is good. If the baseband processing circuit determines the target analog weight matrix by means of target polling, the reference analog weight matrix of each terminal communicating with the network device may have a chance to be determined as the target analog weight matrix. Therefore, when each terminal communicates with the network device, it can receive a signal with better signal quality in at least one period of time. If the baseband processing circuit makes at least one first analog beamforming circuit stop working by controlling the bypass switch, it can avoid that most other terminals receive The signal quality of the signal deteriorates.

Optionally, the baseband processing circuit is further configured to: if the analog weight matrix of at least one first analog beamforming circuit is configured as a target analog weight matrix, then for each terminal, determine the first analog weight matrix corresponding to the target analog weight matrix. Modulation and coding scheme (modulation and coding scheme, MCS) correction value; update the MCS corresponding to the terminal based on the first MCS correction value, and process the signal used for communication with the terminal according to the updated MCS.

For each terminal, the baseband processing circuit uses the first MCS correction value corresponding to the target analog weight matrix to update the MCS of the terminal, and processes the signal used to communicate with the terminal according to the updated MCS, which can ensure The signal quality of the signal received by the terminal is relatively good.

Optionally, the baseband processing circuit is further configured to: if the bypass switch in at least one first analog beamforming circuit maintains the second state, then for each terminal, determine a corresponding second MCS correction value; based on the second MCS The correction value updates the MCS corresponding to the terminal, and processes the signal used for communication with the terminal according to the updated MCS.

If the bypass switch in at least one first analog beamforming circuit maintains the second state, then for each terminal, the baseband processing circuit can use the corresponding second target MCS correction value to update the MCS corresponding to the terminal, and according to the updated The subsequent MCS processes the signals used to communicate with the terminal. In this way, it can be ensured that the signal quality of the signal received by the terminal is relatively good.

Optionally, the network device further includes: P second radio frequency processing circuits, and at least one second analog beamforming circuit; P is an integer greater than 1, and the P second radio frequency processing circuits include at least one second target Radio frequency processing circuit; each second analog beamforming circuit is respectively connected to a second target radio frequency processing circuit and a plurality of oscillator groups, and the second analog beamforming circuit is used for transmitting analog signals to the plurality of oscillator groups connected to it After the analog beamforming is performed, it is transmitted to the second target radio frequency processing circuit; each second radio frequency processing circuit is used to convert a received analog signal into a digital signal, and transmit the converted digital signal to the baseband processing circuit; The baseband processing circuit is further configured to perform digital beamforming on the digital signals transmitted by the P second radio frequency processing circuits; wherein, at least one dipole group is separated between any two dipole groups connected to each second analog beamforming circuit.

In this application, since the multiple dipole groups connected to the second analog beamforming circuit are set at intervals, the analog weight adopted by the second analog beamforming circuit can be set to an integer multiple of the phase difference of the digital weight, so that the analog weight The mixed weight formed after being superimposed with the digital weight is the steering vector. Furthermore, the received signal in the network device has better directivity, and the effect of hybrid beamforming is improved.

In another aspect, a network device is provided, and the network device includes: a baseband processing circuit, P second radio frequency processing circuits, at least one second analog beamforming circuit, and M dipole groups arranged along a first direction, Each dipole group includes at least one antenna dipole arranged along the second direction, the first direction intersects the second direction, and both P and M are integers greater than 1; the P second radio frequency processing circuits include at least one second Target radio frequency processing circuit; each second analog beamforming circuit is respectively connected to a second target radio frequency processing circuit and multiple oscillator groups, and the second analog beamforming circuit is used for transmitting analog signals to the multiple oscillator groups connected to it After the analog beamforming is performed, it is transmitted to the second target radio frequency processing circuit; each second radio frequency processing circuit is used to convert a received analog signal into a digital signal, and transmit the converted digital signal to the baseband processing circuit; The baseband processing circuit is further configured to perform digital beamforming on the digital signals transmitted by the P second radio frequency processing circuits; wherein, at least one dipole group is separated between any two dipole groups connected to each second analog beamforming circuit.

The multiple dipole groups connected to each second analog beamforming circuit in the network device are set at intervals, thus, by setting the analog weights used by each second analog beamforming circuit when performing analog beamforming on analog signals is an integer multiple of the difference between the digital weights, so that the mixed weights formed after the superimposition of the analog weights and the digital weights are steering vectors. Furthermore, the received signal in the network device has better directivity, and the effect of hybrid beamforming is improved.

In another aspect, a beamforming method is provided, which is applied to the network device provided in the above aspect, and the network device includes: a baseband processing circuit, N first radio frequency processing circuits, at least one first analog beamforming circuit, and M dipole groups arranged in one direction, each dipole group includes at least one antenna dipole arranged along the second direction, the first direction and the second direction intersect, N and M are both integers greater than 1; N first The radio frequency processing circuit includes at least one first target radio frequency processing circuit, each first analog beamforming circuit is respectively connected to a first target radio frequency processing circuit and a plurality of dipole groups, and each first analog beamforming circuit is connected to any There is at least one oscillator group between the two oscillator groups; the method includes: the baseband processing circuit performs digital beamforming on the signal to be transmitted, and sends N digital signals obtained by digital beamforming to N first radio frequency processing circuits respectively ; Each first radio frequency processing circuit converts the received digital signal into an analog signal; the first analog beamforming circuit performs analog beamforming on the analog signal transmitted by the first target radio frequency processing circuit, and then transmits it to the connected Multiple vibrator groups.

Optionally, the first analog beamforming circuit includes: a splitter and at least one analog phase shifter; the input end of the splitter is connected to the first target radio frequency processing circuit, and the splitter has a first output end and at least one first Two output ports, the first output port is connected to a vibrator group, and each second output port is connected to a vibrator group through an analog phase shifter; the first analog beamforming circuit performs analog signal transmission on the first target radio frequency processing circuit After the analog beam is formed, it is respectively transmitted to the multiple oscillator groups connected to it, including: after the splitter splits the analog signal transmitted by the first target radio frequency processing circuit, it is respectively transmitted to the first output terminal and at least one second Output terminal: the analog phase shifter performs analog beamforming on the analog signal transmitted by the splitter, and transmits it to the oscillator group connected to it.

Optionally, the first analog beamforming circuit further includes: a bypass switch connected to the splitter; before the splitter splits the analog signal transmitted by the first target radio frequency processing circuit, the method further includes: a baseband processing circuit controlling the bypass switch to be in the first state; wherein, when the bypass switch is in the first state, the shunt can respectively transmit analog signals to the first output end and at least one second output end; when the bypass switch is in the second state , the splitter transmits the analog signal to the first output terminal, and stops transmitting the analog signal to at least one second output terminal.

Optionally, at least one first analog beamforming circuit has a plurality of candidate analog weight matrices; the method further includes: the baseband processing circuit controls the at least one first analog beamforming circuit to sequentially adopt each candidate analog weight matrix, Performing analog beamforming on the analog signal transmitted by the first target radio frequency processing circuit; the baseband processing circuit is based on the signal quality of the signal transmitted by the M oscillator groups after the analog beamforming is performed by using different alternative analog weight matrices, from multiple backup The target analog weight matrix is determined from the analog weight matrix; the baseband processing circuit configures the analog weight matrix of at least one first analog beamforming circuit as the target analog weight matrix.

Optionally, if the first analog beamforming circuit further includes a bypass switch, the method further includes: after the baseband processing circuit controls at least one bypass switch in the first analog beamforming circuit to be in the second state, the M dipoles If the signal quality of the signal transmitted by the group is higher than the signal quality when the target analog weight matrix is used, the baseband processing circuit controls the bypass switch in the at least one first analog beamforming circuit to maintain the second state.

Optionally, the network device establishes a communication connection with multiple terminals; the baseband processing circuit configures the analog weight matrix of at least one first analog beamforming circuit as a target analog weight matrix, including: for each terminal, the baseband processing circuit Based on the signal quality of the signal transmitted by the M oscillator groups for communicating with the terminal, determine the reference analog weight matrix of the terminal from multiple candidate analog weight matrices; if the reference analog weight matrix of at least two terminals is different, Then the baseband processing circuit adopts one of the following methods to determine the target analog weight matrix: determine the reference analog weight matrix of the terminal with the highest scheduling priority as the target analog weight matrix; The reference analog weight matrix of the terminal is determined as the target analog weight matrix; or, if the reference analog weight matrices of at least two terminals are different, and the first analog beamforming circuit further includes a bypass switch, the method further includes: baseband processing The circuit controls the bypass switch in the at least one first analog beamforming circuit to maintain the second state.

Optionally, the beamforming method further includes: if the analog weight matrix of at least one first analog beamforming circuit is configured as a target analog weight matrix, then for each terminal, the baseband processing circuit determines that the analog weight matrix corresponding to the target analog weight matrix The baseband processing circuit updates the MCS corresponding to the terminal based on the first MCS correction value, and processes the signal used for communication with the terminal according to the updated MCS.

Optionally, the beamforming method further includes: if the bypass switch in at least one first analog beamforming circuit remains on, for each terminal, the baseband processing circuit determines the corresponding second MCS correction value; the baseband processing The circuit updates the MCS corresponding to the terminal based on the second MCS correction value, and processes the signal used for communication with the terminal according to the updated MCS.

Optionally, if the network device further includes: P second radio frequency processing circuits, and at least one second analog beamforming circuit; P is an integer greater than 1, and the P second radio frequency processing circuits include at least one second target A radio frequency processing circuit, each second analog beamforming circuit is respectively connected to a second target radio frequency processing circuit and a plurality of dipole groups, and any two dipole groups connected to each second analog beamforming circuit are separated by at least one The oscillator group; the beamforming method further includes: the second analog beamforming circuit performs analog beamforming on the received signal, and sends the N analog signals obtained by analog beamforming to at least one second target radio frequency processing circuit; Each second radio frequency processing circuit converts the received analog signal into a digital signal, and transmits the converted digital signal to the baseband processing circuit; the baseband processing circuit digitally beams the digital signals transmitted by the P second radio frequency processing circuits take shape.

In yet another aspect, a beamforming method is provided, which is applied to the network equipment provided in the above aspect. The network equipment includes: a baseband processing circuit, P second radio frequency processing circuits, at least one second analog beamforming circuit, and M dipole groups arranged in one direction, each dipole group includes at least one antenna dipole arranged along the second direction, the first direction and the second direction intersect, P and M are both integers greater than 1; P second radio frequency The processing circuit includes at least one second target radio frequency processing circuit; each second analog beamforming circuit is respectively connected to a second target radio frequency processing circuit and a plurality of oscillator groups, and any two of the second analog beamforming circuits are connected There is at least one dipole group at intervals between dipole groups; the beamforming method includes: the second analog beamforming circuit performs analog beamforming on the analog signals transmitted by the multiple dipole groups connected to it, and simulates the analog signals obtained by the analog beamforming The signal is transmitted to at least one second target radio frequency processing circuit; each second radio frequency processing circuit converts a received analog signal into a digital signal, and transmits the converted digital signal to the baseband processing circuit; the baseband processing circuit pairs P performing digital beamforming on the digital signal transmitted by the second radio frequency processing circuit;

In yet another aspect, a wireless communication system is provided, and the system includes: a terminal, and the network device provided in any one of the above aspects.

In yet another aspect, a computer-readable storage medium is provided, where instructions are stored in the computer-readable storage medium, and the instructions are executed by a processor to implement the steps performed by the baseband processing circuit in the beamforming method provided by the above aspect.

In another aspect, a computer program product including instructions is provided, and when the computer program product is run on a computer, the computer is made to implement the steps performed by the baseband processing circuit in the beamforming method provided in the above aspect.

In summary, the present application provides a network device, a beamforming method, and a wireless communication system. The multiple dipole groups connected to each first analog beamforming circuit in the network device are arranged at intervals. Therefore, by setting the analog weights used by each first analog beamforming circuit to be an integral multiple of the difference between the digital weights when performing analog beamforming on the analog signals, the analog weights and digital weights can be superimposed to form The blend weights are steering vectors. Furthermore, the signals radiated by the M oscillator groups in the network device have better directivity, and the effect of hybrid beamforming is improved.

Description of drawings

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a network device provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of another network device provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of another network device provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another network device provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of another network device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another network device provided by an embodiment of the present application;

FIG. 8 is a flow chart of a beamforming method provided by an embodiment of the present application;

FIG. 9 is a flow chart of another beamforming method provided by an embodiment of the present application.

Detailed ways

The network device, the beamforming method and the wireless communication system provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

When the network equipment uses digital beamforming (digital beamforming, DBF) technology to perform beamforming on the signal to be transmitted, the baseband processing circuit can perform digital beamforming on the signal to be transmitted to obtain multiple digital signals. The multi-channel digital signal can be transmitted to the oscillator group of the network device through multiple radio frequency processing circuits. Wherein, each radio frequency processing circuit is connected with a vibrator group. DBF technology can realize single-user multiple-input multiple-output (SU-MIMO) scenarios and multi-user multiple-input multiple-output (MU-MIMO) scenarios data transmission.

When the network equipment uses analog beamforming (analog beamforming, ABF) technology to perform beamforming on the signal to be transmitted, each radio frequency processing circuit can be connected to multiple oscillator groups through the analog beamforming circuit. Correspondingly, the analog signal transmitted by each radio frequency processing circuit can be transmitted through multiple dipole groups. Thus, the antenna aperture of the network device can be effectively expanded or the scanning range of the network device can be expanded.

HBF technology combines the advantages of DBF technology and ABF technology. When network equipment adopts HBF technology, it can avoid increasing the number of radio frequency processing circuits on the premise of ensuring a large number of oscillator groups (that is, large antenna aperture and scanning range). Increased structural complexity and cost of network equipment can be avoided. Alternatively, on the premise that the number of radio frequency processing circuits is constant, the number of oscillator groups that can be set in the network device can be effectively increased, thereby effectively increasing the antenna aperture and scanning range of the network device.

Fig. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of the present application. As shown in FIG. 1 , the communication system may include a network device 10 and at least one terminal 11 . Wherein, a wireless communication connection may be established between the network device 10 and each terminal 11 .

Optionally, the terminal 11 may be a mobile phone, a tablet computer, a notebook computer, a desktop computer, a vehicle terminal or a wearable device, etc. The network device 10 may be a base station or a base station controller or the like. Moreover, the network device 10 can provide wireless communication services for the terminals 11 in a specific area (ie, a cell). In the embodiment of the present application, the network device 10 can support communication protocols of different standards. For example, the network device may be a base transceiver station (base transceiver station, BTS) in a global system for mobile communications (GSM) or a code division multiple access (code division multiple access, CDMA) system. Alternatively, it may be a wireless transceiver (NodeB, NB) in a wideband code division multiple access (WCDMA) system. Alternatively, it may also be an evolved base station (evolutional Node B, eNB or eNodeB) in a long term evolution (long term evolution, LTE) system. Alternatively, it may also be a network device in a fifth generation mobile communication technology (5th generation mobile communication technology, 5G) network.

FIG. 2 is a schematic structural diagram of a network device provided by an embodiment of the present application, and the network device may be applied to the wireless communication system shown in FIG. 1 . As shown in FIG. 2, the network device 10 includes: a baseband processing circuit 110, N first radio frequency processing circuits 120, at least one first analog beamforming circuit 130, and M dipole groups 140 arranged along the first direction X . Wherein, both N and M are integers greater than 1. Each dipole group 140 includes at least one antenna dipole 141 arranged along a second direction Y, the first direction X intersects the second direction Y, for example, the first direction X and the second direction Y may be perpendicular. Wherein, the first direction X may be a row direction or a column direction. For example, referring to FIG. 2, the network device 10 may include four first radio frequency processing circuits 120, two first analog beamforming circuits 130, and six oscillator groups 140 arranged along the first direction X, that is, N= 4, M=6.

The baseband processing circuit 110 is configured to perform digital beamforming on signals to be transmitted, and send N digital signals obtained by digital beamforming to N first radio frequency processing circuits 120 respectively.

After the baseband processing circuit 110 acquires the signal to be transmitted, it can process the signal to be transmitted by using a digital weight matrix (that is, adjust the phase of the signal), so as to perform beamforming on the signal to be transmitted in the digital domain, that is, realize Digital beamforming. After digital beamforming, the baseband processing circuit 110 can obtain N channels of digital signals, and can send the N channels of digital signals to N first radio frequency processing circuits 120 respectively. Wherein, the digital weight matrix may include N digital weights with equal phase differences. After the baseband processing circuit 110 uses the digital weight matrix to process the signal to be transmitted, the phases of the obtained N digital signals have fixed phase differences.

Each first radio frequency processing circuit 120 is configured to convert the digital signal into an analog signal after receiving a digital signal sent by the baseband processing circuit 110 . Each first radio frequency processing circuit 120 includes at least a digital-to-analog converter (DAC), and the DAC is capable of converting digital signals into analog signals.

In the embodiment of the present application, the N first radio frequency processing circuits 120 include at least one first target radio frequency processing circuit 120 . Each first analog beamforming circuit 130 is respectively connected to a first target radio frequency processing circuit 120 and a plurality of dipole groups 140 . The first analog beamforming circuit 130 is configured to perform analog beamforming on the analog signals transmitted by the first target radio frequency processing circuit 120 , and transmit them to the plurality of transducer groups 140 connected thereto respectively. Wherein, at least one dipole group 140 is spaced between any two dipole groups 140 connected to each first analog beamforming circuit 130 .

It should be understood that analog beamforming may refer to processing an analog signal by using an analog weight matrix, that is, adjusting the phase of the analog signal.

It should also be understood that the number of first target radio frequency processing circuits 120 included in the network device 10 may be equal to N, that is, each first radio frequency processing circuit 120 may communicate with multiple first analog beamforming circuits 130 The vibrator group 140 is connected. If the number of first target radio frequency processing circuits 120 included in the network device 10 is less than N, other first radio frequency processing circuits 120 other than the first target radio frequency processing circuit 120 may be directly connected to an oscillator group 140, and The processed analog signal can be directly sent to the oscillator group 140 to which it is connected.

For example, referring to FIG. 2 , it is assumed that the network device 10 includes four first radio frequency processing circuits 120 , that is, N=4. The four first radio frequency processing circuits 120 include two first target radio frequency processing circuits 120 , so the network device 10 may include two first analog beamforming circuits 130 . The input end of each first analog beamforming circuit 130 is connected to the output end of a first target radio frequency processing circuit 120, and the output end of each first analog beamforming circuit 130 is connected to two oscillator groups 140, the two oscillators Three vibrator groups 140 are spaced between the groups 140 .

Based on the above analysis, it can be known that the signal to be transmitted can be radiated to the surrounding space through the M oscillator groups 140 after undergoing digital beamforming and analog beamforming. The signals radiated by the M dipole groups 140 may constructively interfere in some directions in space, and destructively interfere in other directions, so that the signals radiated by the M dipole groups 140 have directivity.

It should also be understood that the baseband processing circuit 110 includes N digital channels, and the number N of first radio frequency processing circuits 120 included in the network device 10 is equal to the number of the digital channels.

It can be understood that the phase of the analog signal output by the first analog beamforming circuit 130 is obtained by superimposing the digital weight and the analog weight. If each first analog beamforming circuit 130 is connected to a plurality of adjacent dipole groups 140, then if the phase difference of the digital weights in the digital weight matrix is small, the analog weights adopted by the first analog beamforming circuit 130 If the value is large, the analog signals radiated by the M dipole groups 140 cannot maintain a fixed phase difference. That is to say, the steering vector cannot be formed after superposition of the digital weights and the analog weights, and the orthogonality of the signals radiated from the M oscillator groups 140 to the surrounding space is destroyed, which affects the effect of beamforming.

However, in the embodiment of the present application, since the multiple oscillator groups 140 connected to each first analog beamforming circuit 130 are arranged at intervals, no matter how the phase difference of the digital weights in the digital weight matrix changes, the first analog All the analog weights used by the beamforming circuit 130 may be integer multiples of the phase difference of the digital weights. Thus, it can be ensured that the analog signals radiated by the M dipole groups 140 maintain a fixed phase difference. For example, assuming that a certain first analog beamforming circuit 130 is respectively connected to the m1th dipole group 140 and the m2th dipole group 140 among the M dipole groups 140, the interval between the two dipole groups 140 is |m1- m2|-1 oscillator group 140 . If the phase difference of the digital weights in the digital weight matrix is q°, the first analog beamforming circuit 130 may not perform analog beamforming on the analog signals transmitted to the m1th oscillator group 140, and may use the analog weights : |m1−m2|×q°, performing analog beamforming on the analog signal transmitted to the m2th dipole group 140 .

Assuming that the number N of the first radio frequency processing circuits 120 in the network device 10 is 4, the digital weight matrix used in digital beamforming is [0°, 22.5°, 45°, 67.5°], that is, the phase of the digital weight The difference is 22.5°. After the baseband processing circuit 110 uses the digital weight matrix to process the signal to be transmitted, 4 digital signals can be obtained, and the phase difference between two adjacent digital signals in the 4 digital signals is 22.5°.

If the first first radio frequency processing circuit 120 of the four first radio frequency processing circuits 120 is connected to two adjacent oscillator groups 140 through the first analog beamforming circuit 130, and the first analog beamforming circuit 130 uses If the analog weight is 90°, the first analog beamforming circuit 130 can obtain two channels of analog signals after performing analog beamforming on the analog signal transmitted by the first first radio frequency processing circuit 120 . Wherein, the phase of the analog signal transmitted to the first oscillator group 140 is unchanged, and the phase of the analog signal transmitted to the second oscillator group 140 is shifted by 90°. It can be seen from this that the phase shifts of the 5 analog signals (that is, the signals radiated by the 5 oscillator groups 140 ) obtained after hybrid beamforming relative to the phase of the signal to be transmitted are 0°, 90°, 22.5°, 45°, respectively. °, 67.5°. Alternatively, it can be understood as: the mixed weight matrix formed by superimposing digital weights and analog weights is [0°, 90°, 22.5°, 45°, 67.5°]. It can be seen that the five analog signals radiated by the five vibrator groups cannot be arranged with equal phase differences.

However, in the embodiment of the present application, the first first radio frequency processing circuit 120 may be connected to two spaced oscillator groups 140 through the first analog beamforming circuit 130 . For example, it can be connected to the first dipole group 140 and the fifth dipole group 140, then the analog weight used by the first analog beamforming circuit 130 is: |5–1|×q°=4×22.5=90° , then the first analog beamforming circuit 130 can obtain two channels of analog signals after performing analog beamforming on the analog signal transmitted by the first first radio frequency processing circuit 120 . Wherein the phase of the analog signal transmitted to the first oscillator group 140 is unchanged, and the phase of the analog signal transmitted to the fifth oscillator group 140 is shifted by 90°. It can be seen from this that the phase offsets of the 5 analog signals (that is, the signals radiated by the 5 oscillator groups 140 ) obtained after hybrid beamforming relative to the phase of the signal to be transmitted are 0°, 22.5°, 45°, 67.5°, respectively. °, 90°. Alternatively, it can be understood as: the mixed weight matrix formed after the superposition of digital weights and analog weights is [0°, 22.5°, 45°, 67.5°, 90°], and the mixed weights in the mixed weight matrix Able to form steering vectors. Therefore, the beam after the interference of the five analog signals can be orthogonal to other beams, thereby improving the effect of hybrid beamforming.

In the embodiment of the present application, the digital weight matrix used by the baseband processing circuit 110 in the digital beamforming may be selected from the basic weight matrix. As shown in Table 1, the basic weight matrix may include multiple alternative digital weight matrixes, for example, Table 1 shows four alternative digital weight matrixes. Referring to FIG. 2, if the network device 10 includes N=4 first radio frequency processing circuits 120, each alternative digital weight matrix may include 4 digital weights, and the 4 digital weights may be combined with the 4 There is a one-to-one correspondence between the antenna ports. Wherein, each antenna port is used to connect a dipole group 140 . If the first radio frequency processing circuit 120 is not connected to the first analog beamforming circuit 130, then the antenna port may refer to the output end of the first radio frequency processing circuit 120, if the first radio frequency processing circuit 120 is connected to the first analog beamforming circuit 130, Then the antenna port may refer to the output port of the first analog beamforming circuit 130 .

Referring to Table 1, when W=e ^2π*j/4 , each candidate digital weight matrix is orthogonal to each other candidate digital weight matrix, so that the codebook protocol can be matched. For example, if the baseband processing circuit 110 uses the digital weight matrix 2 to perform digital beamforming on the signal to be transmitted, then the phase offsets of the four digital signals obtained after digital beamforming relative to the phase of the signal to be transmitted are 0° , 90°, 180°, 270°.

Table 1

Referring to FIG. 2 , it is assumed that in the embodiment of the present application, there are 2 first target radio frequency processing circuits 120 among the 4 first radio frequency processing circuits 120 included in the network device 10, and the network device 10 includes 6 oscillator groups 140, each The antenna elements in the element group 140 are all single-polarized antenna elements, that is, N=4, M=6. Among them, the first first radio frequency processing circuit 120 is respectively connected to the first oscillator group 140 and the fifth oscillator group 140 through the first first analog beamforming circuit 130, and the second first radio frequency processing circuit 120 is connected to the first oscillator group 140 through the first The two first analog beamforming circuits 130 are respectively connected to the second dipole group 140 and the sixth dipole group 140 . The second first radio frequency processing circuit 120 is directly connected to the second oscillator group 140, the third first radio frequency processing circuit 120 is directly connected to the third oscillator group 140, and the fourth first radio frequency processing circuit 120 is directly connected to the second oscillator group 140. 4 vibrator groups 140 are connected.

Correspondingly, the first first analog beamforming circuit 130 can use the analog weight 4×q° to perform analog beamforming on the analog signal transmitted to the fifth oscillator group 140, and not to the analog signal transmitted to the first oscillator group 140 Analog signals are subjected to analog beamforming. The second first analog beamforming circuit 130 can use an analog weight of 4×q° to perform analog beamforming on the analog signal transmitted to the sixth oscillator group 140, and not perform analog beamforming on the analog signal transmitted to the second oscillator group 140 Analog beamforming. Then, the analog signal finally transmitted to the six dipole groups 140 is equivalent to adopting any alternative mixing weight matrix shown in Table 2 to perform mixing beamforming on the signal to be sent.

Taking the digital weight matrix 2 in Table 1 as an example, the phase difference of the digital weights in the digital weight matrix 2 is q°=W=90°, then each first analog beamforming circuit 130 The simulated weights used are all 4×90°=360°, that is, 0°. Correspondingly, as shown in Table 2, in the mixing weight matrix 2 corresponding to the digital weight matrix 2, the analog signal transmitted to the fifth oscillator group 140 is equivalent to using the mixing weight "W ⁴ =1" for mixing For beamforming, the analog signal transmitted to the sixth dipole group 140 is equivalent to performing hybrid beamforming by using the hybrid weight “W ⁵ =W”. If the network device 10 uses the hybrid weight matrix 2 to perform hybrid beamforming on the signals to be transmitted, the phases of the six analog signals obtained after hybrid beamforming (that is, the signals radiated by the six oscillator groups 140) are relative to the phases of the signals to be transmitted. The phase offsets are 0°, 90°, 180°, 270°, 360° (ie 0°), and 90°, respectively.

Referring to Table 2, it can be seen that each candidate mixed weight matrix is orthogonal to each other candidate mixed weight matrix. That is, after the analog beamforming circuit is used to perform analog beamforming on the analog signal, each candidate mixed weight matrix is still a steering vector.

Table 2

To sum up, the embodiments of the present application provide a network device, in which multiple dipole groups connected to each analog beamforming circuit are set at intervals. Therefore, by setting each analog beamforming circuit to perform analog beamforming on analog signals, the analog weights used are integer multiples of the difference between the digital weights, so that the mixed weights formed after the analog weights and digital weights are superimposed The value is a steering vector. Furthermore, the signals radiated by the M oscillator groups in the network device have better directivity, and the effect of hybrid beamforming is improved.

It should be understood that, as a possible example, each antenna element 141 in each element group 140 may have a polarization direction, that is, the antenna elements 141 in the element group 140 are all single-polarized antenna elements. In this example, referring to FIG. 2, each oscillator group 140 is only connected to one first radio frequency processing circuit 120, and different oscillator groups 140 (for example, two oscillator groups 140 arranged at intervals) can be connected to the same first radio frequency processing circuit 120. Circuit 120 is connected. Correspondingly, the number N of the first radio frequency processing circuits 120 included in the network device 10 is smaller than the number M of the oscillator groups 140 .

As another possible example, each antenna element in each element group 140 may have two polarization directions, that is, the antenna elements are all dual-polarized antenna elements. In this example, referring to FIG. 3 , each oscillator group 140 is connected to two first radio frequency processing circuits 120, that is, in each oscillator group 140, the oscillators in the first polarization direction (for example, the horizontal polarization direction) are connected to one first A radio frequency processing circuit 120 is connected, and the oscillator of the second polarization direction (for example, the vertical polarization direction) is connected to another first radio frequency processing circuit 120 . Moreover, the dipoles in the same polarization direction in different dipole groups 140 (for example, two dipole groups 140 arranged at intervals) may be connected to the same first radio frequency processing circuit 120 . Correspondingly, in this example, the number N of the first radio frequency processing circuits 120 in the network device satisfies: N/2<M.

FIG. 4 is a schematic structural diagram of another network device 10 provided by an embodiment of the present application. Referring to FIG. 4 , it is assumed that the network device 10 includes 8 first radio frequency processing circuits 120 , 4 first analog beamforming circuits 130 , and 6 dipole groups 140 with two polarization directions, ie N=8, M=6. Each first analog beamforming circuit 140 may be connected to two dipole groups 140 , and the two dipole groups 140 are separated by 3 dipole groups 140 . Wherein, the first first radio frequency processing circuit 120 is respectively connected with the first polarization direction oscillator in the second oscillator group 140 and the first polarized beam in the sixth oscillator group 140 through the first first analog beamforming circuit 130. The oscillator connection in the chemical direction. The second first radio frequency processing circuit 120 communicates with the oscillators in the second polarization direction in the second oscillator group 140 and the second polarization direction in the sixth oscillator group 140 respectively through the second first analog beamforming circuit 130 The vibrator connection. The third first radio frequency processing circuit 120 is directly connected to the oscillator in the first polarization direction in the third oscillator group 140, and the fourth first radio frequency processing circuit 120 is directly connected to the second polarization direction in the third oscillator group 140 The vibrator connection. The fifth first radio frequency processing circuit 120 is directly connected to the oscillator in the first polarization direction in the fourth oscillator group 140, and the sixth first radio frequency processing circuit 120 is directly connected to the second polarization direction in the fourth oscillator group 140. The vibrator connection. The seventh first radio frequency processing circuit 120 communicates with the oscillators in the first polarization direction in the fifth oscillator group 140 and the first polarization direction in the first oscillator group 140 respectively through the third first analog beamforming circuit 130 The eighth first radio frequency processing circuit 120 passes through the fourth first analog beamforming circuit 130, and is respectively connected with the second polarization direction oscillator in the fifth oscillator group 140 and with the first oscillator group 140 The dipole connection of the second polarization direction.

For example, if the digital weight matrix used in digital beamforming is [0°, 45°, 90°, 135°], that is, the phase difference of the digital weights is 45°, then each first analog beamforming circuit 130 The simulated weight used may be: 4×45°=180°. It can be seen that, for any polarization direction, the phase of the six analog signals obtained after hybrid beamforming (that is, the signal radiated by the oscillators in any polarization direction in the six oscillator groups 140) is relative to the phase of the second analog signal The phase shifts are 315°, 0°, 45°, 90°, 135°, 180°, respectively. Alternatively, it can be understood as: the mixed weight matrix formed by superimposing digital weights and analog weights is [315°, 0°, 45°, 90°, 135°, 180°]. The 6 channels of analog signals radiated by the 6 oscillator groups 140 are arranged with equal phase difference, then the beam after the interference of the 6 channels of analog signals radiated by the 6 oscillator groups 140 can match the R15 codebook. Wherein, the R15 codebook refers to the codebook defined in the R15 version of the third generation partnership project (3rd generation partnership project, 3GPP) protocol.

It can also be understood that, during the transmission of the signal to be transmitted to the first analog beamforming circuit 130 or the oscillator group 140 , each device in the signal transmission channel will cause the phase of the signal to be transmitted to shift. If the above-mentioned components make the phase shift of the signal to be transmitted as

Then the phase shifts of the phases of the six analog signals obtained after hybrid beamforming relative to the second signal are:

Hereinafter, the antenna dipole in the dipole group 140 is a single-polarized antenna dipole as an example for description. FIG. 5 is a schematic structural diagram of another network device provided by an embodiment of the present application. Referring to FIG. 5 , each first analog beamforming circuit 130 in the network device 10 may include: a splitter 1301 and at least one analog phase shifter device 1302. The input terminal I1 of the splitter 1301 is connected to a first target radio frequency processing circuit 120, and the splitter 1301 has a first output terminal O1 and at least one second output terminal O2, and the first output terminal O1 is connected to an oscillator group 140 , and each second output terminal O2 is connected to an oscillator group 140 through an analog phase shifter 1302 . The splitter 1301 is used for splitting the analog signal transmitted by the first target radio frequency processing circuit 120 and then transmitting it to each output terminal.

In the embodiment of the present application, the splitter 1301 can also be called a power splitter, which can equally divide the power of one analog signal transmitted by the first target radio frequency processing circuit 120, that is, the splitter 1301 transmits to each output The power of the analog signal at the end is equal. For example, referring to FIG. 5 , assuming that the splitter 1301 has a first output terminal O1 and a second output terminal O2, the splitter 1301 can equally divide the analog signal transmitted by the first target radio frequency processing circuit 120 into Two analog signals of equal power.

Continuing to refer to FIG. 5 , each analog phase shifter 1302 is used to perform analog beamforming on one analog signal transmitted by the splitter 1301, and transmit the analog beamformed analog signal to a dipole group 140 connected to it. Wherein, the analog beamforming refers to that the analog phase shifter 1302 adjusts the phase of the received analog signal based on its configured phase shift (that is, the analog weight).

Since the first output terminal O1 of the splitter 1301 is directly connected to one oscillator group 140, only the second output terminal O2 needs to be connected to the oscillator group 140 through the analog phase shifter 1302, thus effectively reducing the number of components in the first analog beamforming circuit 130. The number of analog phase shifters 1302 to be configured. Furthermore, the structural complexity and cost of the first analog beamforming circuit 130 can be effectively reduced on the basis of ensuring the effect of hybrid beamforming.

Optionally, continuing to refer to FIG. 5 , the first analog beamforming circuit 130 further includes: a bypass switch 1303 connected to the splitter 1301 . The baseband processing circuit 110 is used to control the bypass switch 1303 to be in the first state or the second state. Wherein, when the bypass switch 1303 is in the first state, the splitter 1301 transmits analog signals to the first output terminal O1 and at least one second output terminal O2 respectively. When the bypass switch 1303 is in the second state, the splitter 1301 transmits the analog signal to the first output terminal O1, and stops transmitting the analog signal to at least one second output terminal O2.

It can be understood that, when the bypass switch 1303 is in the first state, the network device 10 can use the hybrid beamforming technology to process the signal to be sent. When the bypass switch 1303 is in the second state, the network device 10 can use a digital beamforming technology to process the signal to be transmitted. It can be seen that by controlling the bypass switch 1303 to be in different states, the network device 10 can use different beamforming technologies to process the signal to be transmitted, which effectively improves the flexibility of the network device.

As a possible example, as shown in FIG. 5, one end of the bypass switch 1303 can be connected to the input terminal I1 of the splitter 1301, and the other end of the bypass switch 1303 can be connected to the first output of the splitter 1301. Terminal O1 is connected. The above-mentioned first state refers to an open state, and the second state refers to an on state or a closed state. Correspondingly, after the baseband processing circuit 110 controls the bypass switch 1303 to be in the second state (that is, the closed state), the bypass switch 1303 can bypass the shunt 1301 . At this time, one analog signal transmitted by the first target radio frequency processing circuit 120 is directly transmitted to an oscillator group 140 connected to the first output terminal O1 of the splitter 1301 via the bypass switch 1303 . That is, the first analog beamforming circuit 130 does not perform analog beamforming on the analog signal transmitted by the first target radio frequency processing circuit 120 .

As another possible example, the splitter 1301 may be a splitter with an adjustable power distribution ratio (also referred to as a power division ratio). The above-mentioned first state may refer to a state in which the power of the analog signals distributed to each output terminal is greater than 0, and the second state may refer to a state in which the power of the analog signals distributed to each second output terminal O2 is all 0. Correspondingly, after the baseband processing circuit 110 controls the bypass switch 1303 to be in the second state, the power of the analog signal output by the splitter 1301 to the first output terminal O1 is 100% of the power of the received analog signal, and the power of the splitter 1301 is 100%. The power of the analog signal output from the splitter 1301 to the second output port O2 is 0, that is, the splitter 1301 stops transmitting the analog signal to the second output port O2. At this time, the first analog beamforming circuit 130 does not perform analog beamforming on the analog signal transmitted by the first target radio frequency processing circuit 120 .

It should be understood that when the network device 10 communicates with a large number of terminals 11, after the network device 10 uses the first analog beamforming circuit 130 to perform analog beamforming, the signal quality of the signal radiated by the M oscillator groups 140 may be lower than that of the network The device 10 only performs digital beamforming on the signal to be transmitted, and does not perform signal quality of analog beamforming. In this case, the baseband processing circuit 110 may control the bypass switch 1303 to be in the second state, so that the first analog beamforming circuit 130 does not perform analog beamforming on the analog signal transmitted by the first target radio frequency processing circuit 120 .

Optionally, the time required for switching the state of the bypass switch 1303 in the first analog beamforming circuit 130 may be at the level of a transmission time interval (transmission time interval, TTI). That is, in two adjacent TTIs, the states of the bypass switch 1303 may be different. In this way, it can be ensured that the network device 10 can use different beamforming techniques to process the signal to be transmitted in different TTIs, that is, the speed at which the network device 10 can switch between different working states is effectively provided.

In this embodiment of the present application, at least one first analog beamforming circuit 130 in the network device 10 may have a plurality of candidate analog weight matrixes, and each candidate matrix records the The simulation weights that can be used. If the network device 10 includes K first analog beamforming circuits 130, and each first analog beamforming circuit 130 includes J analog phase shifters 1302, each alternative analog weight matrix may include J rows A matrix of K columns of simulated weights. The J rows of analog weights are in one-to-one correspondence with the J analog phase shifters 1302 , and the K columns of analog weights are in one-to-one correspondence with the K first analog beamforming circuits 130 . That is, the analog weights in row j and column k in each candidate analog weight matrix are used to indicate the phase shift of the jth analog phase shifter 1302 in the kth first analog beamforming circuit 130 . Wherein, both J and K are positive integers, and K is less than or equal to N, j is a positive integer not greater than J, and k is a positive integer not greater than K.

As an example, assume that the network device 10 includes two first analog beamforming circuits 130 , and each first analog beamforming circuit 130 includes one analog phase shifter 1302 , that is, J=1 and K=2. The two first analog beamforming circuits 130 have two alternative analog weight matrices, and the two alternative analog weight matrices are: A1=[0°, 0°], A2=[180°, 180 °]. Based on the alternative analog weight matrix A1, the baseband processing circuit 110 can configure the phase shift of the analog phase shifter 1302 in each first analog beamforming circuit 130 to be 0°, that is, the analog phase shifter 1302 pair splitter The phase of the analog signal output by the second output terminal O2 of 1301 is not adjusted. For the alternative analog weight matrix A2, the baseband processing circuit 110 can configure the phase shift of the analog phase shifter 1302 in each first analog beamforming circuit 130 to be 180°, that is, each analog phase shifter 1302 can The phase of the analog signal output from the second output terminal O2 of the splitter 1301 is shifted by 180°.

Assume that the network device 10 includes two first analog beamforming circuits 130 , and each first analog beamforming circuit 130 includes two analog phase shifters 1302 , that is, J=2 and K=2. Then the two alternative analog weight matrixes of the two first analog beamforming circuits 130 can be respectively:

Based on the alternative analog weight matrix A3, the baseband processing circuit 110 can configure the phase shifts of the two analog phase shifters 1302 in the first first analog beamforming circuit 130 to be 0°, and set the phase shifts of the second first analog beamforming circuit 130 to 0°. The phase shifts of the two analog phase shifters 1102 in the analog beamforming circuit 130 are also configured to be 0°. Based on the alternative analog weight matrix A4, the baseband processing circuit 110 can configure the phase shift of the first analog phase shifter 1302 in the first analog beamforming circuit 130 to be 180°, and configure the first The phase shift configuration of the second analog phase shifter 1302 in the analog beamforming circuit 130 is 0°. For the second first analog beamforming circuit 130 , its phase shift configuration is the same as that of the first first analog beamforming circuit 130 , which will not be repeated here.

In the embodiment of the present application, the baseband processing circuit 110 may also be used to: control at least one first analog beamforming circuit 130 to sequentially adopt each candidate analog weight matrix to perform analog signal transmission by the first target radio frequency processing circuit 120 Analog beamforming. Based on the signal quality of the signals transmitted by the M oscillator groups 140 after the first analog beamforming circuit 130 uses different alternative analog weight matrices to perform analog beamforming, determine the target simulation from the plurality of alternative analog weight matrices. weight matrix, and configure the simulated weight matrix of at least one first simulated beamforming circuit 130 as the target simulated weight matrix.

That is, the baseband processing circuit 110 may control at least one first analog beamforming circuit 130 to perform analog beamforming by using different candidate analog weight matrices in turn. Afterwards, the effect of the analog beamforming can be determined through the signal quality of the signals transmitted by the M oscillator groups 140, and the alternative analog weight matrix with the best effect (that is, the alternative analog weight matrix corresponding to the signal with the best signal quality) can be determined. Weight matrix) is determined as the target simulation weight matrix. Furthermore, the baseband processing circuit 110 may configure the analog weight matrix of the at least one first analog beamforming circuit 130 as a target analog weight matrix, that is, use the target analog weight matrix to pair the at least one analog beamforming circuit 130 The phase shift of the analog phase shifter 1302 is configured. Therefore, it can be ensured that after the analog beamforming is performed by using the target analog weight matrix, the signal quality of the signals transmitted by the M oscillator groups 140 is better.

It can be understood that the baseband processing circuit 110 controls at least one first analog beamforming circuit 130 to use any alternative analog weight matrix to perform analog beamforming on the analog signal, and through the M oscillator groups 140 the analog beamforming After the signal is transmitted, the terminal 11 may detect the signal quality of the received signal. Afterwards, the terminal 11 can compare the signal quality of the signal after analog beamforming based on each candidate analog weight matrix, and report the identification (for example, index) of the candidate analog weight matrix corresponding to the signal with the best signal quality to the network The baseband processing circuit 110 of the device 10 . Correspondingly, the baseband processing circuit 110 may determine the candidate analog weight matrix with the best effect based on the index reported by the terminal 11 .

Alternatively, the terminal 11 may also report the detection result of the signal quality to the baseband processing circuit 110 of the network device 10, and the baseband processing circuit 110 further compares the simulated beamforming based on each alternative simulated weight matrix based on the received detection result. The signal quality of the signal and determine the best alternative analog weight matrix.

Optionally, the above signal quality may be characterized by at least one of the following detection parameters: signal to interference plus noise ratio (signal to interference plus noise ratio, SINR), reference signal received power (reference signal received power, RSRP) and spectral efficiency performance. In addition, the terminal may report the index of the candidate analog weight matrix corresponding to the signal with the best signal quality to the network device 10 through the 3I process. Wherein, 3I refers to channel quality indicator (channel quality indicator, CQI), rank indicator (rank indication, RI) and precoding matrix indicator (precoding matrix indicator, PMI).

As an example, it is assumed that the two first analog beamforming circuits 130 included in the network device 10 have two candidate analog weight matrices, A1 and A2. Then the baseband processing circuit 110 can control the two first analog beamforming circuits 130 to use alternative analog weight matrices A1 and A2 to perform analog beamforming on the analog signal, and use the M oscillator groups 140 to convert the analog beamforming The signal is sent out. The terminal 11 can detect the signal quality of the received signal. If the terminal 11 determines that the signal quality of the signal beamformed based on the alternative analog weight matrix A1 is better than the signal quality of the signal beamformed based on the alternative analog weight matrix A2, the alternative analog weight The index of the value matrix A1 is reported to the baseband processing circuit 110 of the network device 10 . The baseband processing circuit 110 can then determine the alternative analog weight matrix A1 indicated by the index as the target analog weight matrix of the first analog beamforming circuit 130, and can set the analog phase shifter in each analog beamforming circuit 130 The phase shift of 1302 is configured as 0°.

In the embodiment of the present application, if each first analog beamforming circuit 130 further includes a bypass switch 1303, the baseband processing circuit 110 can also be used to: control the bypass switch in at least one first analog beamforming circuit 130 1303 After all are in the second state, the signal quality of the signal sent by the M dipole groups 140 is higher than the signal quality when the target analog weight matrix is used, then control the bypass switch in the at least one first analog beamforming circuit 130 1303 maintain the second state.

When the baseband processing circuit 110 controls the bypass switch 1303 in at least one first analog beamforming circuit 130 to be in the second state, the splitter 1301 in each first analog beamforming circuit 130 only sends O1 transmits the analog signal, and stops transmitting the analog signal to the second output terminal O2. At this time, the at least one first analog beamforming circuit 130 does not perform analog beamforming on the analog signal output by the first target radio frequency circuit 120 , that is, the analog signal transmitted to each transducer group 140 is only subjected to digital beamforming.

Based on the above analysis, it can be seen that if the at least one first analog beamforming circuit 130 has L (L is an integer greater than 1) candidate analog weight matrices, then the network device 10 can adopt L+1 beamforming methods in total. Beamforming is performed on the signal to be transmitted. The process in which the network device 10 uses the L+1 beamforming methods in turn to perform beamforming on the signal to be transmitted may also be referred to as a process of scanning the L+1 beamforming methods. Among them, the first L types of beamforming methods are all hybrid beamforming methods, and alternative analog weight matrices used in different hybrid beamforming methods are different. The L+1th beamforming manner is digital beamforming. The baseband processing circuit 110 can determine the beamforming effect of the L+1 beamforming methods based on the signal quality detected by the terminal 11, and process the signal to be transmitted by using the beamforming method with the best effect to ensure signal transmission the quality of.

Optionally, in this embodiment of the present application, the network device 10 may scan the L+1 beamforming manners according to a fixed scanning period. That is, the network device 10 may use L+1 beamforming manners in turn to perform beamforming on the signal to be transmitted every scanning period. Alternatively, the network device 10 may determine the time to scan the L+1 beamforming methods according to its performance and overhead. One beamforming method performs beamforming on the signal to be transmitted. Alternatively, the network device 10 may scan the L+1 beamforming methods according to the scanning period, or may determine the time to scan the L+1 beamforming methods based on their performance and overhead.

In this embodiment of the present application, one or more terminals 11 may exist in a cell served by the network device 10 , that is, the network device 10 may establish a communication connection with one or more terminals 11 . Wherein, each terminal 11 may also be referred to as a user. For each terminal 11, the baseband processing circuit 110 can determine the reference simulation of the terminal 11 from multiple alternative simulation weight matrixes based on the signal quality of the signal transmitted by the M oscillator groups 140 for communication with the terminal 11 weight matrix.

The baseband processing circuit 110 may control at least one first analog beamforming circuit 130 to sequentially adopt each alternative analog weight matrix to perform analog beamforming on the analog signal, and sequentially transmit the analog beamformed analog signal through the M oscillator groups 140 go out. Each terminal 11 in the cell can detect the signal quality of the received signal, and report the index of the candidate analog weight matrix corresponding to the signal with the best signal quality to the baseband processing circuit 110 . For each terminal 11, the baseband processing circuit 110 may determine the reference analog weight matrix of the terminal 11 based on the index reported by the terminal 11.

As an example, assume that there are two active terminals U1 and U2 in the cell served by the network device 10 . The baseband processing circuit 110 controls the two first analog beamforming circuits 130 to sequentially use two alternative analog weight matrices A1 and A2 to perform analog beamforming on the analog signal, and through the M oscillator groups 140 the simulated beamforming After the signals are transmitted sequentially, the two terminals U1 and U2 can respectively detect the signal quality of the received signals. If the terminal U1 determines that the analog weight matrix corresponding to the signal with the best signal quality is A1, it may report the index of the alternative analog weight matrix A1 to the baseband processing circuit 110 . If the terminal U2 determines that the analog weight matrix corresponding to the signal with the best signal quality is A2, it may report the index of the alternative analog weight matrix A2 to the baseband processing circuit 110 . The baseband processing circuit 110 can further determine that the reference analog weight matrix of the terminal U1 is A1, and the reference analog weight matrix of the terminal U2 is A2.

In the embodiment of the present application, if the baseband processing circuit 110 determines that there is only one signal to be transmitted by the terminal 11 in the current TTI or the current symbol, it can directly determine the reference analog weight matrix of the terminal 11 as the network device 10 service The target simulation weight matrix of the cell.

If the baseband processing circuit 110 determines that there are signals to be transmitted by multiple terminals 11 in the current TTI or the current symbol, and the reference analog weight matrices of at least two terminals 11 among the multiple terminals 11 are different, the baseband processing circuit 110 can use One of the following ways is used to determine the target simulation weight matrix.

Mode 1: The baseband processing circuit 110 determines the reference analog weight matrix of the terminal 11 with the highest scheduling priority as the target analog weight matrix.

The baseband processing circuit 110 is configured with scheduling priorities of different terminals 11, and the baseband processing circuit 110 can determine the reference simulation weight matrix of the terminal 11 with the highest scheduling priority as the target simulation weight based on the configured scheduling priorities of each terminal 11. matrix of values. That is, the reference simulated weight matrix of the terminal 11 with the highest scheduling priority is determined as the target simulated weight matrix of the cell. Thus, it can be ensured that the signal quality of communication between the terminal 11 with the highest scheduling priority and the network device 10 is relatively good.

Mode 2: The baseband processing circuit 110 sequentially determines the reference analog weight matrix of each terminal 11 as the target analog weight matrix according to the target polling sequence.

In the embodiment of the present application, the baseband processing circuit 110 may sequentially determine the reference analog weight matrix of different terminals 11 as the target analog weight matrix in different TTIs or in different symbols. Wherein, the target polling order may be a descending order of the scheduling priorities of the at least two terminals 11 . Alternatively, the target polling sequence may be determined based on other methods, for example, may be determined randomly.

As an example, it is assumed that there are signals to be sent by two terminals 11 in the current TTI, and the reference analog weight matrices of the two terminals 11 are different. Then in the first TTI, the baseband processing circuit 110 may determine the reference analog weight matrix of the first terminal 11 as the target analog weight matrix in the TTI. In the second TTI, the baseband processing circuit 110 may determine the reference analog weight matrix of the second terminal 11 as the target analog weight matrix in the TTI. In the third TTI, the baseband processing circuit 110 may again determine the reference analog weight matrix of the first terminal 11 as the target analog weight matrix in this TTI, and so on.

The baseband processing circuit 110 uses target polling to determine different target analog weight matrices in different TTIs or different symbols, so that the reference analog weight matrix of each terminal 11 communicating with the network device 10 can be in At least one TTI or symbol is determined as the target simulation weight matrix. Therefore, when each terminal 11 communicates with the network device 10, it can receive a signal with better signal quality within at least one TTI or symbol, thereby ensuring the communication quality of multiple terminals 11 in the cell.

In the embodiment of the present application, if the first analog beamforming circuit 130 further includes a bypass switch 1303, the baseband processing circuit 110 can also be used to: if the reference analog weight matrices of at least two terminals 11 are different, control at least one The bypass switch 1303 in the first analog beamforming circuit 130 maintains the second state.

When the network device 10 simultaneously schedules at least two terminals 11 on one TTI, and the reference analog weight matrices of the at least two terminals 11 are different, the baseband processing circuit 110 in the network device 11 can also control at least one first analog beam The bypass switch 1303 in the shaping circuit 130 maintains the second state. In this case, the network device 10 only performs digital beamforming on the signal to be transmitted.

When there are a large number of active terminals 11 in the cell served by the network device 10 , it may occur that the network device 10 needs to simultaneously schedule signals of a large number of terminals 11 on certain TTIs. Since only one alternative analog weight matrix can take effect on each TTI (that is, only one target analog weight matrix can be determined in each TTI), when the reference analog weight matrices of multiple terminals 11 to be scheduled are different , the target analog weight matrix determined in each TTI is not a reference analog weight matrix with optimal signal quality for some terminals. Therefore, for these terminals 11, the signal quality of analog signals transmitted after adopting hybrid beamforming may be lower than the signal quality of analog signals transmitted only after adopting digital beamforming. In this case, the baseband processing circuit 110 can control the bypass switch so that at least one first analog beamforming circuit 130 stops working, thereby ensuring signal quality when the network device 10 communicates with a large number of terminals 11 .

Based on the above description, it can be seen that for the scenario where the network device 10 communicates with multiple terminals 11 at the same time (that is, the scenario where there are multiple active terminals 11 in the cell), the baseband processing circuit 110 can combine at least one first analog beamforming circuit 130 The analog weight matrix is configured as a target analog weight matrix, that is, the at least one first analog beamforming circuit 130 can perform analog beamforming on analog signals by using the target analog weight matrix. Alternatively, the baseband processing circuit 110 may control the bypass switch 1303 in the at least one analog beamforming circuit 130 to maintain the second state, that is, the at least one first analog beamforming circuit 130 no longer performs analog beamforming operations.

On the one hand, for the scenario where the baseband processing circuit 110 configures the analog weight matrix of at least one first analog beamforming circuit 130 as the target analog weight matrix, the baseband processing circuit 110 can also be used to: for each terminal 11, determine A first MCS correction value corresponding to the target simulation weight matrix, and updating the MCS corresponding to the terminal based on the first MCS correction value, and processing the signal used for communication with the terminal 11 according to the updated MCS . The MCS corresponding to the terminal is reported by the terminal to the baseband processing circuit 110 .

In this embodiment of the present application, for each terminal 11 , the baseband processing circuit 110 may also store a corresponding relationship between the analog weight matrix of the terminal 11 and the MCS correction value. After the baseband processing circuit 110 configures the analog weight matrix of at least one first analog beamforming circuit 130 as the target analog weight matrix, for each terminal 11, the analog weight matrix of the terminal 11 and the MCS correction value In the corresponding relationship of , determine the first target MCS correction value corresponding to the target simulation weight matrix.

It can be understood that, in the corresponding relationship between the simulation weight matrix and the MCS correction value of different terminals 11, the MCS correction value corresponding to the same simulation weight matrix may be different. It can also be understood that, if the baseband resources of the network device 10 are relatively sufficient, in the corresponding relationship between the simulated weight matrix and the MCS correction value of each terminal 11 , each simulated weight matrix may correspond to one MCS correction value. If the baseband resources of the network device 10 are relatively tight, in the corresponding relationship between the simulated weight matrix of each terminal 11 and the MCS correction value, multiple simulated weight matrices (that is, a group of simulated weight matrixes) can correspond to one MCS correction value . For example, two MCS correction values may be recorded in the corresponding relationship, wherein one MCS correction value corresponds to the reference simulation weight matrix of the terminal 11, and the other MCS correction value corresponds to other candidate simulation weight matrixes.

On the other hand, for the scenario where the baseband processing circuit 110 controls at least one bypass switch 1303 in the analog beamforming circuit 130 to maintain the second state (hereinafter referred to as the direct drive scenario), the baseband processing circuit 110 can also be used to: for each For a terminal 11, the baseband processing circuit 110 determines the second MCS correction value corresponding to the direct drive scenario, updates the MCS corresponding to the terminal based on the second MCS correction value, and uses the updated MCS pair for communication with the terminal 11 signal is processed.

In the embodiment of the present application, for each terminal 11 communicating with the network device, the baseband processing circuit 110 may also store the correspondence between the direct drive scenario and the MCS correction value. In the direct drive scenario, for each terminal 11 , the baseband processing circuit 110 may determine the corresponding second MCS correction value from the corresponding relationship between the direct drive scenario of the terminal 11 and the MCS correction value. It should be understood that, for different terminals 11, the MCS correction value corresponding to the direct drive scenario may be different.

Based on the description of the above two aspects, it can be seen that when the network device 10 uses different beamforming methods to perform beamforming on the signal to be transmitted, for each terminal 11, the baseband processing circuit 110 can use the MCS corresponding to the beamforming method The correction value updates the MCS corresponding to the terminal, and processes the signal to be sent according to the updated MCS. Thus, it can be ensured that the signal quality of the signal sent by the network device 10 to each terminal 11 is relatively good.

When there are a large number of active terminals 11 in the cell served by the network device 10 , it may happen that the network device 10 simultaneously schedules signals of a large number of terminals 11 on certain TTIs. Since only one alternative analog weight matrix can take effect on each TTI (that is, only one target analog weight matrix can be determined in each TTI), and the reference analog weight matrices of multiple terminals 11 to be scheduled may also be different , therefore, if the baseband processing circuit 110 sequentially determines the reference analog weight matrix of each terminal 11 as the target analog weight matrix by means of the target polling sequence, it may cause frequent switching of TTI level in the target analog weight matrix . Furthermore, the beamforming manner adopted by the network device 10 may be frequently switched at the TTI level.

Since each terminal 11 has different demodulation performance on signals obtained after beamforming using different beamforming methods, frequent switching of beamforming methods leads to outer loop link adaptation (OLLA) of terminal 11 ) has poor performance. In the embodiment of the present application, for each terminal 11, the baseband processing circuit 110 can use the first MCS correction value corresponding to the target analog weight matrix or the second MCS correction value corresponding to the direct drive scenario to the MCS corresponding to the terminal 11. The update is performed, and the signal used for communicating with the terminal 11 is processed according to the updated MCS. That is, for different beamforming manners, the baseband processing circuit 110 may use different MCSs to process the signal to be sent to the terminal 11 . Thus, the OLLA performance of the terminal 11 can be effectively guaranteed.

FIG. 6 is a schematic structural diagram of another network device 10 provided by an embodiment of the present application. Referring to FIG. 6 , the network device 10 may further include: P second radio frequency processing circuits 150 and at least one second analog beamforming circuit 160 . Wherein, P is an integer greater than 1. Also, P and N may or may not be equal. The P second radio frequency processing circuits 150 include at least one second target radio frequency processing circuit 150 . For example, referring to FIG. 6 , the network device 10 may include 4 second radio frequency processing circuits 150 , that is, P=N=4, and 2 second analog beamforming circuits 160 . Wherein, the 4 second radio frequency processing circuits 150 include 2 second target radio frequency processing circuits 150 .

Each second analog beamforming circuit 160 is respectively connected to a second target radio frequency processing circuit 150 and a plurality of oscillator groups 140, and the second analog beamforming circuit 160 is used for simulating the transmission of the plurality of oscillator groups 140 connected to it. After the signal is subjected to analog beamforming, it is transmitted to the second target radio frequency processing circuit 150 . Wherein, at least one dipole group 140 is spaced between any two dipole groups 140 connected to each second analog beamforming circuit 160 .

It can be understood that when the number of the second target radio frequency processing circuits 150 included in the network device 10 is equal to P, that is, each second radio frequency processing circuit 150 can combine a second analog beamforming circuit 160 with multiple dipole groups 140 connections. If the number of second target radio frequency processing circuits 150 included in the network device 10 is less than P, other second radio frequency processing circuits 150 other than the second target radio frequency processing circuit 150 can be directly connected to a dipole group 140, that is The oscillator group 140 can directly send the received signal to the second radio frequency processing circuit 150 connected thereto.

For example, referring to FIG. 6 , it is assumed that the network device 10 includes 4 second radio frequency processing circuits 150 , that is, P=4. The four second radio frequency processing circuits 150 include two second target radio frequency processing circuits 150 , so the network device 10 may include two second analog beamforming circuits 160 . The input end of each second analog beamforming circuit 160 is connected to two dipole groups 140 , and the two dipole groups 140 are separated by three dipole groups 140 . An output terminal of each second analog beamforming circuit 160 is connected to an input terminal of a second target radio frequency processing circuit 150 .

Each second radio frequency processing circuit 150 converts a received analog signal into a digital signal, and transmits to the baseband processing circuit 110 . Each second radio frequency processing circuit 150 at least includes an analog to digital converter (analog to digital converter, ADC), and the ADC is capable of converting an analog signal into a digital signal.

After the baseband processing circuit 110 receives P channels of digital signals transmitted by the P second radio frequency processing circuits 150 , it may perform digital beamforming on the P channels of digital signals.

FIG. 7 is a schematic structural diagram of a second analog beamforming circuit provided in an embodiment of the present application. As shown in FIG. 6 , each second analog beamforming circuit 160 may include a combiner 1601 and at least one analog phase shifter 1602 . Wherein, the output terminal C1 of the combiner 1601 is connected to a second target radio frequency processing circuit 150, and the combiner 1602 has a first input terminal B1 and at least one second input terminal B2. The first input terminal B1 is directly connected to a dipole group 140 , each second input terminal B2 is connected to an output terminal of an analog phase shifter 1602 , and the input terminal of each analog phase shifter 1602 is connected to a dipole group 140 .

Optionally, as shown in FIG. 6 , the second analog beamforming circuit 160 further includes: a bypass switch 1603 connected to the combiner 1601 . The baseband processing circuit 110 is used to control the bypass switch 1603 to be in the first state or the second state. Wherein, when the bypass switch 1603 is in the first state, the combiner 1601 combines the analog signals of the first input terminal B1 and at least one second input terminal B2, and then transmits to the second target radio frequency connected to it. circuit 150. When the bypass switch 1603 is in the second state, the splitter 1601 directly transmits the analog signal input from the first input terminal B1 to the second target radio frequency circuit 150 connected to it, that is, the splitter 1601 stops performing at least one second The analog signals input from the input terminal B2 are combined.

It can be understood that the at least one second analog beamforming circuit 150 may also have multiple alternative analog weight matrices. The baseband processing circuit 110 may also be configured to: control at least one second analog beamforming circuit 160 to sequentially adopt each candidate analog weight matrix to perform analog beamforming on the analog signals transmitted by the M oscillator groups 140 . The baseband processing circuit 110 determines a target analog weight matrix from multiple candidate analog weight matrices based on signal quality of signals obtained after analog beamforming is performed using different candidate analog weight matrices. The baseband processing circuit 110 configures the analog weight matrix of the at least one second analog beamforming circuit 160 as a target analog weight matrix.

Similarly, if the second analog beamforming circuit 160 further includes a bypass switch 1603, the baseband processing circuit 110 can also be used to: control the bypass switch 1603 in at least one second analog beamforming circuit 160 to be in the second state Afterwards, if the signal quality of the signals transmitted by the M dipole groups 140 is higher than the signal quality when the target analog weight matrix is used, the bypass switch 1603 in at least one second analog beamforming circuit 160 is controlled to maintain the second state.

Optionally, if the network device 10 establishes a communication connection with multiple terminals 11, the baseband processing circuit 110 may be used to: for each terminal 11, based on the The signal quality of the signal obtained after analog beamforming is performed on the signal, and the reference analog weight matrix of the terminal 11 is determined from the plurality of candidate analog weight matrixes. That is, the baseband processing circuit 110 may determine the candidate analog weight matrix corresponding to the signal with the best signal quality as the reference analog weight matrix of the terminal 11 .

If the reference analog weight matrixes of at least two terminals 11 are different, the baseband processing circuit 110 may determine the target analog weight matrix in one of the following ways: determine the reference analog weight matrix of the terminal 11 with the highest scheduling priority is the target simulation weight matrix; according to the target polling sequence, the reference simulation weight matrix of each terminal 11 is sequentially determined as the target simulation weight matrix. Or, if the reference analog weight matrices of at least two terminals 11 are different, and the second analog beamforming circuit 160 further includes a bypass switch 1603, control the bypass switch 1603 in at least one second analog beamforming circuit 160 to maintain the first Two states.

Optionally, the baseband processing circuit 110 is further configured to: if the analog weight matrix of at least one second analog beamforming circuit 160 is configured as a target analog weight matrix, then for each terminal 11, determine The third MCS correction value of . Afterwards, the baseband processing circuit 110 uses the third target MCS correction value to update the MCS corresponding to the terminal 11, and sends the updated MCS to the terminal 11, and the terminal 11 can then use the updated MCS to communicate with the network device 110 communication signals are processed.

Optionally, the baseband processing circuit 110 is further configured to: determine a corresponding fourth MCS correction value for each terminal 11 if the bypass switch 1603 in at least one second analog beamforming circuit 160 maintains the second state. Afterwards, the baseband processing circuit 110 uses the fourth target MCS correction value to update the MCS corresponding to the terminal 11, and sends the updated MCS to the terminal 11, and the terminal 11 can further use the updated MCS to communicate with the network device 110 communication signals are processed.

It can be understood that the communication channels between the network device 10 and the terminal 11 (including uplink communication and downlink communication) may include data transmission channels and control channels. For both the data transmission channel and the control channel, the signals may be processed by the hybrid beamforming method in the above embodiment. And for both the data transmission channel and the control channel, the required beamforming method can be determined by detecting the signal quality. If the beamforming method of the digital transmission channel determined by the network device is different from the beamforming method of the control channel, the final beamforming method can be determined according to the priority of the channel or the sequence of determining the beamforming method .

It can also be understood that when the network device 10 communicates with the terminal 11 using time division duplexing (time division duplexing, TDD) technology, for the scenario of uplink communication (that is, the scenario where the network device 10 receives a signal sent by the terminal 11), the network device 10 The signal quality of the received signal may be detected based on a sounding reference signal (SRS). For the downlink communication scenario (that is, the scenario where the network device 10 sends a signal to the terminal 11), the terminal 11 may also detect the signal quality of the signal it receives based on the SRS.

When the network device 10 communicates with the terminal 11 using frequency division duplexing (FDD) technology, for an uplink communication scenario, the network device 10 can detect the signal quality of the signal it receives based on the SRS. For the downlink communication scenario, the terminal 11 may detect the signal quality of the signal it receives based on channel state information (channel state information, CSI).

In the embodiment of the present application, the baseband processing circuit 110 may be located in a baseband processing unit (building base band unit, BBU) of the network device 10, the first radio frequency processing circuit 120, the first analog beamforming circuit 130 and the oscillator group 140 Both may be located in an active antenna unit (active antenna unit, AAU) of the network device 10. Alternatively, the first radio frequency processing circuit 110 may be located in a remote radio unit (remote radio unit, RRU), and the first analog beamforming circuit 130 and the dipole group 140 may be packaged in an antenna housing.

To sum up, the embodiment of the present application provides a network device. The multiple dipole groups connected to each first analog beamforming circuit in the network device are set at intervals, thus, by setting the analog weights used by each first analog beamforming circuit when performing analog beamforming on analog signals is an integer multiple of the difference between the digital weights, so that the mixed weights formed after the superimposition of the analog weights and the digital weights are steering vectors. Furthermore, the signals radiated by the M oscillator groups in the network device have better directivity, and the effect of hybrid beamforming is improved. Moreover, the first radio frequency processing circuit is connected to a plurality of dipole groups arranged at intervals through the first analog beamforming circuit. On the premise that the number of first radio frequency processing circuits is fixed, the antenna aperture can be enlarged by increasing the number of dipole groups, thereby effectively Improve the range when M oscillator groups radiate signals to the surrounding space. When the network device communicates with many terminals, the network device can adopt different beamforming methods to perform beamforming on the signal to be transmitted, and use the MCS corresponding to the beamforming method to process the signal to be transmitted. Therefore, while ensuring good signal quality for communication between the network device and a large number of terminals, the working flexibility of the network device is effectively improved.

The embodiment of the present application also provides a beamforming method, which can be applied to the network device provided in the foregoing embodiment. As shown in Figure 8, the method includes:

Step 101: The baseband processing circuit performs digital beamforming on the signal to be transmitted, and sends N digital signals obtained by digital beamforming to N first radio frequency processing circuits respectively.

Step 102, each first radio frequency processing circuit converts the received digital signal into an analog signal.

Step 103: The first analog beamforming circuit performs analog beamforming on the analog signals transmitted by the first target radio frequency processing circuit, and then transmits them to the multiple oscillator groups connected thereto.

For the implementation process of step 101 to step 103, reference may be made to relevant descriptions in the embodiments of the network device above, and details are not repeated here.

Optionally, as shown in FIG. 4 , the first analog beamforming circuit 130 includes: a splitter 1301 and at least one analog phase shifter 130 . The input end of the splitter 1301 is connected to the first target radio frequency processing circuit 120, the splitter 1301 has a first output end O1 and at least one second output end O2, and the first output end O1 is connected to an oscillator group 140 , each second output terminal O2 is connected to an oscillator group 140 through an analog phase shifter 1302 . The above step 103 may include:

In step 1031, the splitter splits the analog signal transmitted by the first target radio frequency processing circuit, and transmits it to the first output terminal and at least one second output terminal respectively.

Step 1032: The analog phase shifter performs analog beamforming on the analog signal transmitted by the splitter, and then transmits it to the oscillator group connected to it.

Optionally, as shown in FIG. 4 , the first analog beamforming circuit 130 further includes: a bypass switch 1303 connected to the splitter 1301. Before the above step 1031, the method may also include:

Step 1033, the baseband processing circuit controls the bypass switch to be in the first state.

Wherein, when the bypass switch is in the first state, the splitter can respectively transmit analog signals to the first output end and the at least one second output end; when the bypass switch is in the second state, the splitter The router transmits the analog signal to the first output terminal, and stops transmitting the analog signal to the at least one second output terminal.

For the implementation process of step 1031 to step 1033, reference may be made to relevant descriptions in the embodiments of the network device above, and details are not repeated here.

Optionally, at least one first analog beamforming circuit has a plurality of alternative analog weight matrices; with continued reference to FIG. 7, the method may further include:

Step 104, the baseband processing circuit controls at least one first analog beamforming circuit to sequentially adopt each candidate analog weight matrix to perform analog beamforming on the analog signal transmitted by the first target radio frequency processing circuit.

Step 105: The baseband processing circuit determines a target analog weight matrix from multiple candidate analog weight matrices based on the signal quality of signals transmitted by the M oscillator groups after analog beamforming is performed using different alternative analog weight matrices.

Step 106a, the baseband processing circuit configures the analog weight matrix of at least one first analog beamforming circuit as a target analog weight matrix.

Optionally, if the first analog beamforming circuit further includes a bypass switch, the method further includes:

Step 106b, if the baseband processing circuit controls at least one bypass switch in the first analog beamforming circuit to be in the second state, the signal quality of the signals transmitted by the M dipole groups is higher than that when the target analog weight matrix is used , the baseband processing circuit controls the bypass switch in the at least one first analog beamforming circuit to maintain the second state.

For the implementation process of step 104 to step 106b, reference may be made to relevant descriptions in the embodiments of the network device above, and details are not repeated here.

Optionally, the network device establishes communication connections with multiple terminals. The above step 106a may include:

Step 106a1, for each terminal, the baseband processing circuit determines the reference analog weight matrix of the terminal from multiple candidate analog weight matrixes based on the signal quality of the signals transmitted by the M oscillator groups for communication with the terminal;

Step 106a2. If the reference analog weight matrixes of at least two terminals are different, the baseband processing circuit determines the target analog weight matrix in one of the following ways:

The reference simulation weight matrix of the terminal with the highest scheduling priority is determined as the target simulation weight matrix.

According to the target polling sequence, the reference simulation weight matrix of each terminal is sequentially determined as the target simulation weight matrix.

Alternatively, if the reference analog weight matrices of at least two terminals are different, and the first analog beamforming circuit further includes a bypass switch, the method may further include: the baseband processing circuit controls the at least one first analog beamforming circuit in the The bypass switch maintains the second state. That is, the baseband processing circuit can execute the above step 106b.

For the implementation process of step 106a1 to step 106a2, reference may be made to relevant descriptions in the embodiments of the network device above, and details are not repeated here.

Optionally, as shown in FIG. 7, after the above step 106a, the method may further include:

Step 107a, for each terminal, the baseband processing circuit determines a first MCS correction value corresponding to the target analog weight matrix.

Step 108a, the baseband processing circuit updates the MCS corresponding to the terminal based on the first MCS correction value, and processes the signal used for communication with the terminal according to the updated MCS.

For the implementation process of step 107a to step 108a, reference may be made to relevant descriptions in the embodiments of the network device above, and details are not repeated here.

Optionally, as shown in FIG. 7, after the above step 106b, the method may further include:

Step 107b, for each terminal, the baseband processing circuit determines a corresponding second MCS correction value.

Step 108b, the baseband processing circuit updates the MCS corresponding to the terminal based on the second MCS correction value, and processes the signal used for communication with the terminal according to the updated MCS.

For the implementation process of step 107b to step 108b, reference may be made to relevant descriptions in the embodiments of the network device above, and details are not repeated here.

It should be understood that the order of the steps of the beamforming method provided in the embodiment of the present application may be appropriately adjusted, and the steps may also be increased or decreased according to circumstances. For example, step 107a and step 108a can be performed before step 104, or can be deleted according to circumstances. Or, the above step 106b to step 108b can be deleted according to the situation.

To sum up, the embodiments of the present application provide a beamforming method. The multiple dipole groups connected to each first analog beamforming circuit in the network device are set at intervals. Therefore, by setting the analog weights used by each first analog beamforming circuit to be an integer multiple of the difference between the digital weights when performing analog beamforming on the analog signals, the analog weights and digital weights can be superimposed to form The mixing weight of is the steering vector. Furthermore, the signals radiated by the M oscillator groups in the network device have better directivity, and the effect of hybrid beamforming is improved.

The embodiment of the present application also provides a beamforming method, which can be applied to the network device provided in the foregoing embodiment. As shown in Figure 9, the method includes:

Step 201, the second analog beamforming circuit performs analog beamforming on the received signal, and sends N channels of analog signals obtained by analog beamforming to at least one second target radio frequency processing circuit respectively.

Step 202 , each second radio frequency processing circuit converts a received analog signal into a digital signal, and transmits the converted digital signal to the baseband processing circuit.

Step 203, the baseband processing circuit performs digital beamforming on the digital signals transmitted by the P second radio frequency processing circuits.

For the implementation process of steps 201 to 203, reference may be made to relevant descriptions in the embodiments of the network device above, and details are not repeated here.

To sum up, the embodiments of the present application provide a beamforming method. The multiple dipole groups connected to each second analog beamforming circuit in the network device are set at intervals. Therefore, by setting the analog weights used by each second analog beamforming circuit to be an integer multiple of the difference between the digital weights when performing analog beamforming on the analog signals, the analog weights and digital weights can be superimposed to form The mixing weight of is the steering vector. Furthermore, the signal received by the baseband processing circuit in the network device has better directivity, and the effect of hybrid beamforming is improved.

The embodiment of the present application also provides a wireless communication system. As shown in FIG. 1 , the wireless communication system may include: a terminal 11 and a network device 10 . Wherein, the network device 10 can be the network device shown in Figure 2, Figure 3, Figure 4, Figure 5 or Figure 6 provided in the above embodiment, and the network device 10 can be used to implement the beam beam provided by the above method embodiment Forming method.

It can be understood that the wireless communication system provided in the embodiment of the present application may be an antenna feeder system, a microwave communication system or a satellite communication system, etc., and the network equipment and the beamforming method provided in the embodiment of the present application may be used to realize signal Hybrid beamforming, and has better beamforming effect.

The embodiment of the present application also provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and the instructions are executed by a processor, so as to implement the steps performed by the baseband processing circuit in the foregoing method embodiments.

The embodiment of the present application also provides a computer program product containing instructions, and when the computer program product is run on a computer, the computer is made to execute the steps performed by the baseband processing circuit in the above method embodiments.

The above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or other arbitrary combinations. When implemented using software, the above-described embodiments may be implemented in whole or in part in the form of computer program products. The computer program product includes one or more computer instructions. When the computer program instructions are loaded or executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more sets of available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media. The semiconductor medium may be a solid state drive (SSD).

The meaning of the term "at least one" in this application refers to one or more, the meaning of the term "multiple" in this application refers to two or more, for example, a plurality of terminals refers to two or more terminal.

The above is only an optional implementation mode of the application, but the protection scope of the application is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the technical scope disclosed in the application. The modifications or replacements should be covered by the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A network device, characterized in that the network device includes: a baseband processing circuit, N first radio frequency processing circuits, at least one first analog beamforming circuit, and M dipole groups arranged along a first direction, each The dipole groups include at least one antenna dipole arranged along a second direction, the first direction intersects the second direction, and both N and M are integers greater than 1;

The baseband processing circuit is configured to perform digital beamforming on the signal to be transmitted, and send N digital signals obtained by digital beamforming to the N first radio frequency processing circuits respectively;

Each of the first radio frequency processing circuits is configured to convert a received digital signal into an analog signal, and the N first radio frequency processing circuits include at least one first target radio frequency processing circuit;

Each of the first analog beamforming circuits is respectively connected to one of the first target radio frequency processing circuits and a plurality of dipole groups, and the first analog beamforming circuit is used for simulating the transmission of the first target radio frequency processing circuit After the signal is subjected to analog beamforming, it is respectively transmitted to multiple oscillator groups connected to it;

Wherein, at least one dipole group is spaced between any two dipole groups connected to each of the first analog beamforming circuits.
The network device according to claim 1, wherein the first analog beamforming circuit comprises: a splitter and at least one analog phase shifter;

The input end of the splitter is connected to the first target radio frequency processing circuit;

The splitter has a first output terminal and at least one second output terminal, the first output terminal is connected to one of the vibrator groups, and each of the second output terminals is connected to one of the analog phase shifters through one of the analog phase shifters. The oscillator group is connected, and the splitter is used to split the analog signal transmitted by the first target radio frequency processing circuit;

The analog phase shifter is used to perform analog beamforming on the analog signal transmitted by the splitter.
The network device according to claim 2, wherein the first analog beamforming circuit further comprises: a bypass switch connected to the splitter;

The baseband processing circuit is used to control the bypass switch to be in the first state or the second state;

Wherein, when the bypass switch is in the first state, the splitter transmits analog signals to the first output terminal and the at least one second output terminal respectively;

When the bypass switch is in the second state, the splitter transmits the analog signal to the first output terminal and stops transmitting the analog signal to the at least one second output terminal.
The network device according to any one of claims 1 to 3, wherein the at least one first analog beamforming circuit has multiple alternative analog weight matrixes; the baseband processing circuit is also used for:

controlling the at least one first analog beamforming circuit to sequentially adopt each of the candidate analog weight matrixes to perform analog beamforming on the analog signal transmitted by the first target radio frequency processing circuit;

Based on the signal quality of signals transmitted by the M oscillator groups after using different candidate analog weight matrices for analog beamforming, determine a target analog weight matrix from the plurality of candidate analog weight matrices;

The analog weight matrix of the at least one first analog beamforming circuit is configured as the target analog weight matrix.
The network device according to claim 4, wherein if the first analog beamforming circuit also includes a bypass switch, the baseband processing circuit is also used for:

If the bypass switches in the at least one first analog beamforming circuit are controlled to be in the second state, the signal quality of the signals transmitted by the M dipole groups is higher than the signal quality when the target analog weight matrix is used , then controlling the bypass switch in the at least one first analog beamforming circuit to maintain the second state.
The network device according to claim 4 or 5, wherein the network device establishes communication connections with a plurality of terminals; the baseband processing circuit is used for:

For each of the terminals, based on the signal quality of the signals transmitted by the M oscillator groups for communicating with the terminal, determine the reference analog weights of the terminal from the plurality of candidate analog weight matrices matrix;

If the reference simulation weight matrixes of at least two terminals are different, one of the following methods is used to determine the target simulation weight matrix:

Determining the reference simulation weight matrix of the terminal with the highest scheduling priority as the target simulation weight matrix;

According to the target polling sequence, sequentially determine the reference simulation weight matrix of each terminal as the target simulation weight matrix;

Or, if the reference analog weight matrixes of at least two terminals are different, and the first analog beamforming circuit further includes a bypass switch, then controlling the bypass switch in the at least one first analog beamforming circuit to maintain second state.
The network device according to claim 6, wherein the baseband processing circuit is also used for:

If the analog weight matrix of the at least one first analog beamforming circuit is configured as the target analog weight matrix, then for each terminal, determine the first modulation and coding corresponding to the target analog weight matrix Policy MCS correction value;

The MCS corresponding to the terminal is updated based on the first MCS correction value, and the signal used for communication with the terminal is processed according to the updated MCS.
The network device according to claim 6, wherein the baseband processing circuit is also used for:

If the bypass switch in the at least one first analog beamforming circuit maintains a second state, then for each of the terminals, determine a corresponding second MCS correction value;

The MCS corresponding to the terminal is updated based on the second MCS correction value, and the signal used for communication with the terminal is processed according to the updated MCS.
The network device according to any one of claims 1 to 8, wherein the network device further comprises: P second radio frequency processing circuits, and at least one second analog beamforming circuit; the P is greater than 1 An integer, and the P second radio frequency processing circuits include at least one second target radio frequency processing circuit;

Each of the second analog beamforming circuits is respectively connected to one of the second target radio frequency processing circuits and multiple oscillator groups, and the second analog beamforming circuit is used for simulating the transmission of the multiple oscillator groups connected to it After the signal is subjected to analog beamforming, it is transmitted to the second target radio frequency processing circuit;

Each of the second radio frequency processing circuits is configured to convert a received analog signal into a digital signal, and transmit the converted digital signal to the baseband processing circuit;

The baseband processing circuit is further configured to perform digital beamforming on the digital signals transmitted by the P second radio frequency processing circuits;

Wherein, at least one dipole group is spaced between any two dipole groups connected to each second analog beamforming circuit.
A network device, characterized in that the network device includes: a baseband processing circuit, P second radio frequency processing circuits, at least one second analog beamforming circuit, and M dipole groups arranged along a first direction, each The dipole groups include at least one antenna dipole arranged along a second direction, the first direction intersects the second direction, and both P and M are integers greater than 1;

The P second radio frequency processing circuits include at least one second target radio frequency processing circuit;

Each of the second analog beamforming circuits is respectively connected to one of the second target radio frequency processing circuits and multiple oscillator groups, and the second analog beamforming circuit is used for simulating the transmission of the multiple oscillator groups connected to it After the signal is subjected to analog beamforming, it is transmitted to the second target radio frequency processing circuit;

Each of the second radio frequency processing circuits is configured to convert a received analog signal into a digital signal, and transmit the converted digital signal to the baseband processing circuit;

The baseband processing circuit is further configured to perform digital beamforming on the digital signals transmitted by the P second radio frequency processing circuits;

Wherein, at least one dipole group is spaced between any two dipole groups connected to each second analog beamforming circuit.
A beamforming method, characterized in that it is applied to a network device, and the network device includes: a baseband processing circuit, N first radio frequency processing circuits, at least one first analog beamforming circuit, and M dipole groups, each dipole group includes at least one antenna dipole arranged along a second direction, the first direction intersects the second direction, and both N and M are integers greater than 1 ; The N first radio frequency processing circuits include at least one first target radio frequency processing circuit, each of the first analog beamforming circuits is respectively connected to one of the first target radio frequency processing circuits and a plurality of oscillator groups, and At least one dipole group is separated between any two dipole groups connected to each of the first analog beamforming circuits; the method includes:

The baseband processing circuit performs digital beamforming on the signal to be transmitted, and sends N digital signals obtained by digital beamforming to the N first radio frequency processing circuits respectively;

Each of the first radio frequency processing circuits converts a received digital signal into an analog signal;

The first analog beamforming circuit performs analog beamforming on the analog signals transmitted by the first target radio frequency processing circuit, and then transmits them to the plurality of transducer groups connected thereto.
The method according to claim 11, wherein the first analog beamforming circuit comprises: a splitter and at least one analog phase shifter; the input end of the splitter is connected to the first target radio frequency processing Circuit connection, the splitter has a first output terminal and at least one second output terminal, the first output terminal is connected to one of the vibrator groups, and each of the second output terminals is shifted through one of the analog phases The device is connected to one of the vibrator groups;

The first analog beamforming circuit performs analog beamforming on the analog signal transmitted by the first target radio frequency processing circuit, and then transmits it to multiple oscillator groups connected to it respectively, including:

The splitter splits the analog signal transmitted by the first target radio frequency processing circuit, and transmits it to the first output terminal and the at least one second output terminal respectively;

The analog phase shifter performs analog beamforming on the analog signal transmitted by the splitter, and then transmits it to the oscillator group connected to it.
The method according to claim 12, wherein the first analog beamforming circuit further comprises: a bypass switch connected to the splitter; processing the first target radio frequency in the splitter Before the analog signal transmitted by the circuit is split, the method further includes:

The baseband processing circuit controls the bypass switch to be in a first state;

Wherein, when the bypass switch is in the first state, the splitter can respectively transmit analog signals to the first output terminal and the at least one second output terminal; when the bypass switch is in the second state, the splitter transmits analog signals to the first output terminal and stops transmitting analog signals to the at least one second output terminal.
The method according to any one of claims 11 to 13, wherein the at least one first analog beamforming circuit has a plurality of alternative analog weight matrices; the method further comprises:

The baseband processing circuit controls the at least one first analog beamforming circuit to sequentially adopt each of the candidate analog weight matrices to perform analog beamforming on the analog signal transmitted by the first target radio frequency processing circuit;

The baseband processing circuit determines the target from the multiple candidate analog weight matrices based on the signal quality of the signals transmitted by the M oscillator groups after using different candidate analog weight matrices for analog beamforming. Simulate weight matrix;

The baseband processing circuit configures an analog weight matrix of the at least one first analog beamforming circuit as the target analog weight matrix.
The method according to claim 14, wherein if the first analog beamforming circuit further includes a bypass switch, the method further comprises:

If the bypass switches in the at least one first analog beamforming circuit are controlled to be in the second state, the signal quality of the signals transmitted by the M dipole groups is higher than the signal quality when the target analog weight matrix is used , the baseband processing circuit controls the bypass switch in the at least one first analog beamforming circuit to maintain the second state.
The method according to claim 14 or 15, wherein the network device establishes communication connections with multiple terminals; the baseband processing circuit configures the analog weight matrix of the at least one first analog beamforming circuit Simulate a weight matrix for the target, consisting of:

For each of the terminals, the baseband processing circuit determines the terminal from the plurality of candidate analog weight matrixes based on the signal quality of signals transmitted by the M oscillator groups for communicating with the terminal The reference simulation weight matrix of ;

If the reference analog weight matrixes of at least two terminals are different, the baseband processing circuit determines the target analog weight matrix in one of the following ways:

Determining the reference simulation weight matrix of the terminal with the highest scheduling priority as the target simulation weight matrix;

According to the target polling sequence, sequentially determine the reference simulation weight matrix of each terminal as the target simulation weight matrix;

Alternatively, if the reference analog weight matrices of at least two terminals are different, and the first analog beamforming circuit further includes a bypass switch, the method further includes:

The baseband processing circuit controls the bypass switch in the at least one first analog beamforming circuit to maintain a second state.
The method according to claim 16, further comprising:

If the analog weight matrix of the at least one first analog beamforming circuit is configured as the target analog weight matrix, then for each of the terminals, the baseband processing circuit determines the corresponding target analog weight matrix First MCS correction value;

The baseband processing circuit updates the MCS corresponding to the terminal based on the first MCS correction value, and processes signals used for communication with the terminal according to the updated MCS.
The method according to claim 17, further comprising:

If the bypass switch in the at least one first analog beamforming circuit remains on, for each of the terminals, the baseband processing circuit determines a corresponding second MCS correction value;

The baseband processing circuit updates the MCS corresponding to the terminal based on the second MCS correction value, and processes signals used for communication with the terminal according to the updated MCS.
The beamforming method according to any one of claims 11 to 18, wherein the network device further comprises: P second radio frequency processing circuits, and at least one second analog beamforming circuit; the P is greater than 1 is an integer, and the P second radio frequency processing circuits include at least one second target radio frequency processing circuit, each of the second analog beamforming circuits is connected with one of the second target radio frequency processing circuits and a plurality of oscillator groups connected, and at least one dipole group is separated between any two dipole groups connected to each of the second analog beamforming circuits; the method also includes:

The second analog beamforming circuit performs analog beamforming on the received signal, and sends N analog signals obtained by analog beamforming to the at least one second target radio frequency processing circuit respectively;

Each of the second radio frequency processing circuits converts a received analog signal into a digital signal, and transmits the converted digital signal to the baseband processing circuit;

The baseband processing circuit performs digital beamforming on the digital signals transmitted by the P second radio frequency processing circuits.
A beamforming method, characterized in that it is applied to a network device, and the network device includes: a baseband processing circuit, P second radio frequency processing circuits, at least one second analog beamforming circuit, and M dipole groups, each dipole group includes at least one antenna dipole arranged along a second direction, the first direction intersects the second direction, and both P and M are integers greater than 1 The P second radio frequency processing circuits include at least one second target radio frequency processing circuit; each of the second analog beamforming circuits is respectively connected to one of the second target radio frequency processing circuits and a plurality of oscillator groups, and At least one dipole group is separated between any two dipole groups connected to each of the second analog beamforming circuits; the method includes:

The second analog beamforming circuit performs analog beamforming on the analog signals transmitted by the multiple dipole groups connected to it, and transmits the analog signals obtained by analog beamforming to the at least one second target radio frequency processing circuit;

Each of the second radio frequency processing circuits converts a received analog signal into a digital signal, and transmits the converted digital signal to the baseband processing circuit;

The baseband processing circuit performs digital beamforming on the digital signals transmitted by the P second radio frequency processing circuits.
A wireless communication system, characterized in that the system includes: a terminal, and the network device according to any one of claims 1 to 10.