CN107306148A - Signal processing method, base station and terminal under the mixed architecture of digital simulation domain - Google Patents

Abstract

The invention discloses a signal processing method, a base station and a terminal under a digital-analog domain mixed architecture. The method includes: sending system information and control information to the terminal according to high-level configuration; receiving digital domain beam indication feedback information and analog domain beam indication feedback information; send a downlink reference signal to the terminal, receive the channel information sent by the terminal; perform scheduling and pairing processing on the terminal according to the channel information, and send data to the terminal; according to the confirmation information or non-confirmation information sent by the terminal, Determine whether to perform HARQ processing.

Description

Signal processing method, base station and terminal under hybrid architecture of digital and analog domains

technical field

The present invention relates to wireless transmission technology, and in particular to a signal processing method, a base station and a terminal under a mixed digital and analog domain architecture.

Background technique

In order to meet the needs of business growth and service quality, the 5G mobile communication network for IMT-2020 needs to achieve a 1000-fold increase in network capacity, while reducing energy consumption of base stations and improving operational efficiency. Building a green wireless access network is a key direction for future networks. Based on random matrix theory, it can be proved that when the base station has far more antennas than terminals, the channels between each terminal will tend to be orthogonal, and multiple users can transmit without interference on the same time-frequency resources. At the same time, large-scale antennas also bring huge array gain, which greatly reduces system energy consumption. Massive MIMO technology plays a key role in improving network capacity, reducing network energy consumption, and promoting sustainable network development.

The multi-antenna technology has been fully applied in current 4G systems, such as Long Term Evolution (LTE, Long Term Evolution)/LTE-A, LTE-Advanced. On the one hand, the number of transceiver antennas continues to increase, such as the current 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) related projects on full-dimensional multiple-input multiple-output (FD-MIMO, Full-DimensionMulti-Input-Multi-Output) It can support MIMO (Multi-Input-Multi-Output) transmission of up to 64 antenna ports; on the other hand, MIMO transmission modes are more diverse, such as transmit diversity, spatial multiplexing, beamforming and Multi-user MIMO, etc. However, regardless of the transmission mode, the current multi-antenna processing is still performed in the digital domain, as shown in FIG. 1 .

It is foreseeable that as the number of antennas continues to increase, if the signal processing of multiple antennas is still concentrated in the digital domain, it will inevitably bring a very large cost overhead and algorithm processing complexity, especially in high-frequency communication systems, such as millimeter wave communications. Therefore, multi-antenna systems with hybrid architectures in the digital and analog domains have gradually drawn widespread attention. How to deal with the signal transmission of multi-antenna systems with hybrid architectures in digital domain and analog domain is an open problem.

Contents of the invention

In order to solve the above-mentioned technical problems, embodiments of the present invention provide a signal processing method, a base station, and a terminal under a mixed architecture of digital and analog domains.

The signal processing method under the mixed architecture of digital and analog domains provided by the embodiment of the present invention includes:

Send system information and control information to the terminal according to the high-level configuration;

receiving the digital domain beam indication feedback information and the analog domain beam indication feedback information sent by the terminal;

Send a downlink reference signal to the terminal, and receive channel information sent by the terminal;

performing scheduling and pairing processing on the terminal according to the channel information, and sending data to the terminal;

Determine whether to perform Hybrid Automatic Repeat reQuest (HARQ, Hybrid Automatic Repeat reQuest) processing according to the acknowledgment information or non-acknowledgement information sent by the terminal.

In an embodiment of the present invention, the method further includes:

According to the analog domain beam selection and feedback manner, the analog domain codeword indication signaling is added to the control information.

In the embodiment of the present invention, adding the analog domain codeword indication signaling to the control information includes:

A new downlink control information (DCI, Downlink Control Information) format is set in the control channel, and the codeword indication signaling currently used in the analog domain is added through the new DCI format.

In the embodiment of the present invention, the method further includes: performing hybrid precoding on the analog domain and the digital domain; wherein,

The analog domain precoding matrix is updated at a preset time granularity according to a fixed structure; the digital domain codebook is dynamically adjusted according to terminal channel changes; or,

The precoding matrix during data transmission includes the digital domain and the analog domain, and the precoding matrix is dynamically updated according to the terminal channel through alternate optimization.

In the embodiment of the present invention, the sending the downlink reference signal to the terminal includes:

The downlink reference signal is sent to the antenna element through the antenna port, and the downlink reference signal is sent through the antenna element.

A signal processing method under a digital-analog hybrid architecture provided by another embodiment of the present invention includes:

Receive system information and control information sent by the base station;

Sending digital domain beam indication feedback information and analog domain beam indication feedback information to the base station;

receiving a downlink reference signal sent by the base station, performing channel estimation according to the downlink reference signal, obtaining channel information, and sending the channel information to the base station;

receiving data sent by the base station, demodulating the data according to the control information; sending confirmation information or non-confirmation information to the base station according to the demodulation result.

In an embodiment of the present invention, the method further includes:

Perform downlink channel estimation based on each antenna element to obtain the original spatial channel;

Feedback of the codeword indication in the analog domain is performed according to the channel condition of the original spatial channel.

In the embodiment of the present invention, performing channel estimation according to the downlink reference signal to obtain channel information, and sending the channel information to the base station include:

According to the analog domain codeword indication signaling in the control information, perform reference signal received power RSRP measurement on the current beam in the analog domain; according to the measurement result, perform feedback on the analog domain beam according to a specified criterion; wherein the feedback is an explicit Formal feedback or implicit feedback; or,

Perform downlink channel estimation based on each antenna element to obtain the original spatial channel; feed back the codeword index used in the analog domain according to the specified criteria.

The base station provided by the embodiment of the present invention includes:

The first processing unit is configured to send system information and control information to the terminal according to high-level configuration; receive digital domain beam indication feedback information and analog domain beam indication feedback information sent by the terminal;

The second processing unit is configured to send a downlink reference signal to the terminal; receive channel information sent by the terminal;

The third processing unit is configured to perform scheduling and pairing processing on the terminal according to the channel information, and send data to the terminal;

The fourth processing unit is configured to determine whether to perform HARQ processing according to the acknowledgment information or non-acknowledgment information sent by the terminal.

In the embodiment of the present invention, the first processing unit is further configured to add an analog domain codeword indication signaling to the control information according to an analog domain beam selection and feedback manner.

In the embodiment of the present invention, the first processing unit is further configured to set a new DCI format in the control channel, and add the codeword indication signaling currently used in the analog domain through the new DCI format.

In the embodiment of the present invention, the base station further includes: a fifth processing unit, configured to perform hybrid precoding on the analog domain and the digital domain; wherein, the analog domain precoding matrix is updated at a preset time granularity according to a fixed structure; the digital domain The codebook is dynamically adjusted according to the change of the terminal channel; or, the precoding matrix during data transmission includes the digital domain and the analog domain, and the precoding matrix is dynamically updated according to the terminal channel through an alternate optimization method.

In the embodiment of the present invention, the second processing unit is also used for:

The downlink reference signal is sent to the antenna element through the antenna port, and the downlink reference signal is sent through the antenna element.

The terminal provided by the embodiment of the present invention includes:

The first processing unit is configured to receive system information and control information sent by the base station; send digital domain beam indication feedback information and analog domain beam indication feedback information to the base station;

The second processing unit is configured to receive a downlink reference signal sent by the base station, perform channel estimation according to the downlink reference signal, obtain channel information, and send the channel information to the base station;

The third processing unit is configured to receive data sent by the base station, demodulate the data according to the control information, and send confirmation information or non-confirmation information to the base station according to the demodulation result.

In the embodiment of the present invention, the terminal further includes:

The fourth processing unit is configured to perform downlink channel estimation based on each antenna element to obtain the original spatial channel; perform feedback of codeword indication in the analog domain according to the channel condition of the original spatial channel.

In the embodiment of the present invention, the second processing unit is further configured to perform RSRP measurement on the current beam in the analog domain according to the analog domain codeword indication signaling in the control information; feedback in the domain beam; wherein, the feedback is explicit feedback or implicit feedback; or, perform downlink channel estimation based on each antenna element to obtain the original spatial channel; and feed back the codeword index used in the analog domain according to a specified criterion.

In the technical solution of the embodiment of the present invention, the base station sends system information and control information to the terminal according to the high-level configuration; receives the digital domain beam indication feedback information and the analog domain beam indication feedback information sent by the terminal; sends the downlink reference signal to the terminal, and the receiving terminal sends channel information; perform scheduling and pairing processing on the terminal according to the channel information, and send data to the terminal; determine whether to perform HARQ processing according to the confirmation information or non-confirmation information sent by the terminal. It can be seen that the embodiment of the present invention realizes the signal transmission of the multi-antenna system under the hybrid architecture of the digital domain and the analog domain.

Description of drawings

FIG. 1 is a structural diagram of an existing antenna system;

2 is a schematic flowchart of a signal processing method under a digital-analog domain hybrid architecture according to Embodiment 1 of the present invention;

3 is a schematic flowchart of a signal processing method under a digital-analog domain mixed architecture according to Embodiment 2 of the present invention;

FIG. 4 is a flow chart of signal processing under the mixed architecture of digital and analog domains according to Embodiment 3 of the present invention;

FIG. 5 is a diagram of a mixed architecture of analog and digital domains according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the structural composition of a base station according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a structural composition of a terminal according to an embodiment of the present invention.

detailed description

In order to understand the characteristics and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present invention.

Multi-antenna technology has been fully applied in the current 4G system. However, regardless of the transmission mode, the current multi-antenna processing is still performed in the digital domain. With the continuous increase in the number of antennas, if the multi-antenna signal processing is still concentrated in the digital domain, it is bound to bring very serious problems. Large cost overhead and algorithm processing complexity. To this end, an embodiment of the present invention proposes a signal processing method under a digital-analog hybrid architecture.

FIG. 2 is a schematic flowchart of a signal processing method under a digital-analog domain hybrid architecture according to Embodiment 1 of the present invention. In this example, the signal processing method under a digital-analog domain hybrid architecture is applied to the base station side, as shown in FIG. 2 , the The signal processing method under the mixed digital and analog domain architecture includes the following steps:

Step 201: Send system information and control information to the terminal according to high-layer configuration.

In the embodiment of the present invention, the digital-analog hybrid architecture is shown in FIG. 5 , which can be divided into full-connection and partial-connection structures according to different mapping (connection) modes between TXRUs and antenna elements. According to the different mapping (connection) methods from the antenna port to the TXRU, it can be divided into non-precoded RS (Non-precoded RS), beam-formed RS (Beamformed RS) or a combination of the two.

Based on the multi-antenna system of the digital-analog hybrid architecture, the base station sends system information and control information to the terminal according to the high-level configuration.

Here, according to the analog domain beam selection and feedback manner, the analog domain codeword indication signaling is added to the control information.

Specifically, according to the difference in the beam selection and feedback methods in the analog domain, compared with the existing LTE/LTE-A standard practice, the analog domain codeword indication signaling is added to the control information to avoid causing the sub-channel estimation of each antenna array complexity problem.

In the embodiment of the present invention, adding the analog domain codeword indication signaling to the control information includes:

A new DCI format is set in the control channel, and the codeword indication signaling currently used in the analog domain is added through the new DCI format.

As an implementation manner, in the embodiment of the present invention, downlink channel estimation is based on each antenna element. Because this method can directly obtain the original spatial channel, each terminal can perform subsequent analog domain codeword indication feedback according to its own channel conditions, and theoretically does not need indication signaling for the current codeword status in the control channel.

Step 202: Receive the digital domain beam indication feedback information and the analog domain beam indication feedback information sent by the terminal.

In the existing LTE/LTE-A system, multi-antenna related processing is only performed in the data domain, and fixed beam direction is used in the analog domain. In the embodiment of the present invention, since the digital-analog domain hybrid architecture is adopted, and a certain degree of flexible beam pointing processing is allowed in the analog domain, according to the difference in beam selection and feedback methods in the analog domain, in addition to the feedback in the digital domain, a new Analog domain beam indication feedback information.

Step 203: Send a downlink reference signal to the terminal, and receive channel information sent by the terminal.

In the embodiment of the present invention, the base station sends a downlink reference signal, and then the terminal performs channel estimation according to the downlink reference signal sent by the base station, so as to acquire channel information and feed back the channel information. Here, the channel information is the following information: Rank Indication (RI, Rank Indication), Channel Quality Indicator (CQI, Channel Quality Indicator), and Precoding Matrix Indicator (PMI, Precoding Matrix Indicator).

In the embodiment of the present invention, the downlink reference signal needs to be sent to the antenna element through the antenna port, and the downlink reference signal is sent through the antenna element.

Step 204: Perform scheduling and pairing processing on the terminal according to the channel information, and send data to the terminal.

Here, the base station performs terminal scheduling and pairing processing according to the channel information fed back by the terminal, and then transmits data. The terminal side demodulates the received data according to the control information.

Step 205: Determine whether to perform HARQ processing according to the confirmation information or non-confirmation information sent by the terminal.

In the embodiment of the present invention, the terminal feeds back acknowledgment information or non-acknowledgement information (ACK/NACK) according to the demodulation result, and then the base station decides whether to start the HARQ process according to the ACK/NACK reported by the terminal.

FIG. 3 is a schematic flowchart of a signal processing method under a digital-analog domain hybrid architecture according to Embodiment 2 of the present invention. In this example, the signal processing method under a digital-analog domain hybrid architecture is applied to the terminal side, as shown in FIG. 3 . The signal processing method under the mixed digital and analog domain architecture includes the following steps:

Step 301: Receive system information and control information sent by a base station.

Step 302: Send the digital domain beam indication feedback information and the analog domain beam indication feedback information to the base station.

In an embodiment of the present invention, the method further includes:

Perform downlink channel estimation based on each antenna element to obtain the original spatial channel;

Feedback of the codeword indication in the analog domain is performed according to the channel condition of the original spatial channel.

Step 303: Receive the downlink reference signal sent by the base station, perform channel estimation according to the downlink reference signal, obtain channel information, and send the channel information to the base station.

In the embodiment of the present invention, performing channel estimation according to the downlink reference signal to obtain channel information, and sending the channel information to the base station include:

According to the analog domain codeword indication signaling in the control information, perform RSRP measurement on the current beam in the analog domain; according to the measurement result, perform feedback on the analog domain beam according to a specified criterion; wherein the feedback is explicit feedback or implicit feedback feedback; or,

Perform downlink channel estimation based on each antenna element to obtain the original spatial channel; feed back the codeword index used in the analog domain according to the specified criteria.

In the embodiment of the present invention, the base station sends the downlink reference signal to the antenna element through the antenna port, and sends the downlink reference signal through the antenna element.

Step 304: Receive the data sent by the base station, demodulate the data according to the control information; send confirmation information or non-confirmation information to the base station according to the demodulation result.

FIG. 4 is a flow chart of signal processing under the digital-analog domain mixed architecture of Embodiment 4 of the present invention. As shown in FIG. 4 , the process includes:

The base station sends system information and control information according to the high-level configuration. Here, according to the difference in the beam selection and feedback methods in the analog domain, compared with the existing LTE/LTE-A standard practice, in terms of control information, the digital-analog domain hybrid architecture needs to add analog domain codeword indication signaling to avoid the daily The Complexity Problem of Linear Array Sub-channel Estimation.

Reference signal transmission and channel information feedback. Specifically, the base station sends a downlink reference signal, and then the terminal performs channel estimation according to the downlink reference signal sent by the base station, so as to acquire channel information and feed back channel information (RI/CQI/PMI). In the embodiment of the present invention, the base station sends the downlink reference signal to the antenna element through the antenna port, and sends the downlink reference signal through the antenna element. Here, in the existing LTE/LTE-A system, the multi-antenna related processing is only performed in the data domain, and the analog domain adopts fixed beam pointing. Since the embodiment of the present invention adopts a digital-analog hybrid architecture and allows a certain degree of flexible beam pointing processing in the analog domain, according to the difference in beam selection and feedback methods in the analog domain, in addition to the feedback in the digital domain, it is necessary to add an analog Feedback indication for domain beams.

User scheduling and data transmission and reception. Specifically, the base station performs user scheduling and pairing processing according to the channel information fed back by the terminal, and then performs data transmission. The terminal side demodulates the received data according to the control information.

HARQ mechanism. Specifically, the terminal feeds back ACK/NACK according to the demodulation result, and then the base station decides whether to start the HARQ process according to the ACK/NACK reported by the terminal.

The specific process involved in each of the above stages is described as follows:

Analog domain codeword indication:

Solution 1: Define a new DCI format in the existing LTE/LTE-A control channel DCI, and add the currently used codeword in the analog field to indicate signaling.

Solution 2: The downlink channel estimation based on each antenna element can directly obtain the original spatial channel. Therefore, each terminal can perform subsequent analog domain code word indication feedback according to its own channel conditions. In this case, there is no need for control channel for Indication signaling of the codeword currently used.

Channel information acquisition and feedback:

Solution 1: The terminal performs RSRP measurement on the current beam in the analog domain according to the analog domain codeword indication signaling in the control channel, and according to the measurement results, it feeds back the analog domain beam according to a certain criterion (usually the maximum RSRP), which needs to be explained What is interesting is that the feedback here is not necessarily explicit feedback (direct feedback of analog beam or angle information), but also implicit feedback (index indication information for analog beam or angle).

Solution 2: Since the original spatial channel on each antenna element is obtained, the terminal directly feeds back the index of the codeword used in the analog domain according to a certain criterion, such as the principle of maximizing the signal-to-noise ratio.

Hybrid precoding of analog domain and digital domain:

Solution 1: The analog domain precoding matrix is implemented according to a fixed structure (for example: DFT codebook), updated at a larger time granularity, and the digital domain codebook is dynamically adjusted according to user channel changes.

Solution 2: The precoding matrix during data transmission has a digital domain and an analog domain, and is dynamically updated according to the user's channel conditions through alternate optimization.

Fig. 6 is a schematic diagram of the structural composition of the base station according to Embodiment 4 of the invention. As shown in Fig. 6, the base station includes:

The first processing unit 61 is configured to send system information and control information to the terminal according to high-level configuration; receive digital domain beam indication feedback information and analog domain beam indication feedback information sent by the terminal;

The second processing unit 62 is configured to send a downlink reference signal to the terminal; receive channel information sent by the terminal;

The third processing unit 63 is configured to perform scheduling and pairing processing on the terminal according to the channel information, and send data to the terminal;

The fourth processing unit 64 is configured to determine whether to perform HARQ processing according to the acknowledgment information or non-acknowledgment information sent by the terminal.

The first processing unit 61 is further configured to add an analog domain codeword indication signaling to the control information according to the analog domain beam selection and feedback manner.

The first processing unit 61 is further configured to set a new DCI format in the control channel, and add the codeword indication signaling currently used in the analog domain through the new DCI format.

The base station also includes: a fifth processing unit 65, configured to perform mixed precoding on the analog domain and the digital domain; wherein, the analog domain precoding matrix is updated at a preset time granularity according to a fixed structure; the digital domain codebook is updated according to the terminal channel Changes are dynamically adjusted; or, the precoding matrix during data transmission includes a digital domain and an analog domain, and the precoding matrix is dynamically updated according to the terminal channel through an alternate optimization method.

In the embodiment of the present invention, the second processing unit 62 is further configured to: send the downlink reference signal to the antenna element through the antenna port, and send the downlink reference signal through the antenna element.

Those skilled in the art should understand that the implementation functions of each unit in the base station shown in FIG. 6 can be understood with reference to the relevant description of the signal processing method under the digital-analog hybrid architecture.

FIG. 7 is a schematic diagram of the structural composition of the terminal according to Embodiment 5 of the present invention. As shown in FIG. 7, the terminal includes:

The first processing unit 71 is configured to receive system information and control information sent by the base station; send digital domain beam indication feedback information and analog domain beam indication feedback information to the base station;

The second processing unit 72 is configured to receive a downlink reference signal sent by the base station, perform channel estimation according to the downlink reference signal, obtain channel information, and send the channel information to the base station;

The third processing unit 73 is configured to receive data sent by the base station, demodulate the data according to the control information, and send confirmation information or non-confirmation information to the base station according to the demodulation result.

The terminal also includes:

The fourth processing unit 74 is configured to perform downlink channel estimation based on each antenna element to obtain an original spatial channel; perform feedback of an analog domain codeword indication according to the channel condition of the original spatial channel.

The second processing unit 72 is further configured to perform RSRP measurement on the current beam in the analog domain according to the analog domain codeword indication signaling in the control information; and perform feedback on the analog domain beam according to a specified criterion according to the measurement result; Wherein, the feedback is explicit feedback or implicit feedback; or, the downlink channel estimation based on each antenna element is performed to obtain the original spatial channel; and the codeword index used in the analog domain is fed back according to a specified criterion.

As an implementation manner, in the embodiment of the present invention, downlink channel estimation is based on each antenna element. Because this method can directly obtain the original spatial channel, each terminal can perform subsequent analog domain codeword indication feedback according to its own channel conditions, and theoretically does not need indication signaling for the current codeword status in the control channel.

Those skilled in the art should understand that the implementation functions of each unit in the terminal shown in FIG. 7 can be understood with reference to the relevant description of the signal processing method under the digital-analog hybrid architecture.

The technical solutions described in the embodiments of the present invention may be combined arbitrarily if there is no conflict.

In the several embodiments provided by the present invention, it should be understood that the disclosed methods and smart devices can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or May be integrated into another system, or some features may be ignored, or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical or other forms of.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units; Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be fully integrated into a second processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention.

Claims (16)

1. A signal processing method under a digital-analog domain hybrid architecture, characterized in that the method comprises: Send system information and control information to the terminal according to the high-level configuration; receiving the digital domain beam indication feedback information and the analog domain beam indication feedback information sent by the terminal; Send a downlink reference signal to the terminal, and receive channel information sent by the terminal; performing scheduling and pairing processing on the terminal according to the channel information, and sending data to the terminal; According to the acknowledgment information or non-acknowledgment information sent by the terminal, it is determined whether to perform hybrid automatic repeat request (HARQ) processing. 2. The signal processing method under the hybrid architecture of digital and analog domains according to claim 1, wherein the method further comprises: According to the analog domain beam selection and feedback manner, the analog domain codeword indication signaling is added to the control information. 3. The signal processing method under the hybrid architecture of digital and analog domains according to claim 2, wherein the adding an analog domain codeword indication signaling to the control information includes: A new downlink control information DCI format is set in the control channel, and the codeword indication signaling currently used in the analog domain is added through the new DCI format. 4. The signal processing method under the mixed digital and analog domain architecture according to any one of claims 1 to 3, wherein the method further comprises: performing hybrid precoding on the analog domain and the digital domain; wherein, The analog domain precoding matrix is updated at a preset time granularity according to a fixed structure; the digital domain codebook is dynamically adjusted according to terminal channel changes; or, The precoding matrix during data transmission includes the digital domain and the analog domain, and the precoding matrix is dynamically updated according to the terminal channel through alternate optimization. 5. The signal processing method under the hybrid architecture of digital and analog domains according to claim 4, wherein the sending the downlink reference signal to the terminal comprises: The downlink reference signal is sent to the antenna element through the antenna port, and the downlink reference signal is sent through the antenna element. 6. A signal processing method under a digital-analog domain hybrid architecture, characterized in that the method comprises: Receive system information and control information sent by the base station; Sending digital domain beam indication feedback information and analog domain beam indication feedback information to the base station; receiving a downlink reference signal sent by the base station, performing channel estimation according to the downlink reference signal, obtaining channel information, and sending the channel information to the base station; receiving data sent by the base station, demodulating the data according to the control information; sending confirmation information or non-confirmation information to the base station according to the demodulation result. 7. The signal processing method under the hybrid architecture of digital and analog domains according to claim 6, wherein the method further comprises: Perform downlink channel estimation based on each antenna element to obtain the original spatial channel; Feedback of the codeword indication in the analog domain is performed according to the channel condition of the original spatial channel. 8. The signal processing method under the hybrid digital-analog domain architecture according to claim 6, wherein said performing channel estimation according to said downlink reference signal to obtain channel information, and sending said channel information to a base station comprises: According to the analog domain codeword indication signaling in the control information, perform reference signal received power RSRP measurement on the current beam in the analog domain; according to the measurement result, perform feedback on the analog domain beam according to a specified criterion; wherein the feedback is an explicit Formal feedback or implicit feedback; or, Perform downlink channel estimation based on each antenna element to obtain the original spatial channel; feed back the codeword index used in the analog domain according to the specified criteria. 9. A base station, characterized in that the base station comprises: The first processing unit is configured to send system information and control information to the terminal according to high-level configuration; receive digital domain beam indication feedback information and analog domain beam indication feedback information sent by the terminal; The second processing unit is configured to send a downlink reference signal to the terminal; receive channel information sent by the terminal; The third processing unit is configured to perform scheduling and pairing processing on the terminal according to the channel information, and send data to the terminal; The fourth processing unit is configured to determine whether to perform HARQ processing according to the acknowledgment information or non-acknowledgment information sent by the terminal. 10. The base station according to claim 9, wherein the first processing unit is further configured to add an analog domain codeword indication signaling to the control information according to an analog domain beam selection and feedback mode. 11. The base station according to claim 10, wherein the first processing unit is further configured to set a new DCI format in the control channel, and add the codeword currently used in the analog domain through the new DCI format Indicate signaling. 12. The base station according to any one of claims 9 to 11, characterized in that the base station further comprises: a fifth processing unit configured to perform mixed precoding on the analog domain and the digital domain; wherein the analog domain precoding The matrix is updated at a preset time granularity according to a fixed structure; the digital domain codebook is dynamically adjusted according to the terminal channel change; or, the precoding matrix during data transmission includes the digital domain and the analog domain, and the precoding matrix is optimized according to the terminal channel through alternate optimization. Make dynamic updates. 13. The base station according to claim 12, wherein the second processing unit is further configured to: The downlink reference signal is sent to the antenna element through the antenna port, and the downlink reference signal is sent through the antenna element. 14. A terminal, characterized in that the terminal comprises: The first processing unit is configured to receive system information and control information sent by the base station; send digital domain beam indication feedback information and analog domain beam indication feedback information to the base station; The second processing unit is configured to receive a downlink reference signal sent by the base station, perform channel estimation according to the downlink reference signal, obtain channel information, and send the channel information to the base station; The third processing unit is configured to receive data sent by the base station, demodulate the data according to the control information, and send confirmation information or non-confirmation information to the base station according to the demodulation result. 15. The terminal according to claim 14, further comprising: The fourth processing unit is configured to perform downlink channel estimation based on each antenna element to obtain the original spatial channel; perform feedback of codeword indication in the analog domain according to the channel condition of the original spatial channel. 16. The terminal according to claim 14, wherein the second processing unit is further configured to perform RSRP measurement on the current beam in the analog domain according to the analog domain codeword indication signaling in the control information; According to the measurement results, the analog domain beam is fed back according to the specified criterion; wherein, the feedback is explicit feedback or implicit feedback; or, the downlink channel estimation based on each antenna element is performed to obtain the original spatial channel; the feedback is based on the specified criterion The codeword index used in the analog domain.