WO2022267793A1

WO2022267793A1 - Signal transmission method, transmission system, and electronic device

Info

Publication number: WO2022267793A1
Application number: PCT/CN2022/094492
Authority: WO
Inventors: 刘微; 李虎虎
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-06-21
Filing date: 2022-05-23
Publication date: 2022-12-29
Also published as: CN115514381A

Abstract

A signal transmission method, a transmission system, and an electronic device. The signal transmission method is applied to an outdoor unit, and comprises: receiving a first user packet from an indoor unit by means of a digital signal transmission line, the first user packet comprising a first digital signal (1100); acquiring the first digital signal from the first user packet (1200); processing the first digital signal into a first radio-frequency signal (1300); and sending the first radio-frequency signal to the opposite-end outdoor unit by means of an antenna (1400).

Description

A signal transmission method, transmission system and electronic equipment

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202110688278.2 and a filing date of June 21, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The present application relates to the technical field of communications, and in particular to a signal transmission method, transmission system and electronic equipment.

Background technique

Point-to-point communication (Point To Point Microwave Communication) is an important link structure of the microwave millimeter wave backhaul network. Backhaul refers to the use of electromagnetic waves in the microwave and millimeter wave bands for link communication between the backbone network and the hierarchical network in the telecommunications network. Compared with the traditional optical fiber backhaul network, microwave and millimeter wave point-to-point backhaul has the advantages of low cost, small size, and easy installation, and is widely used in the actual network environment of major communication operators.

The traditional microwave point-to-point communication equipment is shown in Figure 1. The indoor unit (IDU) and the outdoor unit (ODU) are divided by radio frequency analog signals, and the intermediate frequency cable is used for long-distance connection. The remote distance of conventional indoor units and outdoor units is limited, and there are relatively large restrictions on the placement of indoor unit equipment. In addition, the farther the space distance, the greater the insertion loss of the RF cable. With the development of high-bandwidth mobile communication technology, people have higher and higher requirements for wireless communication speed and stability. Traditional microwave communication is limited by IF cables and radio frequency links. Conventional IF cables have poor in-band flatness and cannot meet large bandwidth requirements.

Contents of the invention

The following is an overview of the topics described in detail in this article. This summary is not intended to limit the scope of the claims.

Embodiments of the present application provide a signal transmission method, a transmission system, and electronic equipment, which can enable microwave communication to meet a large bandwidth requirement and improve the stability of signal transmission.

In the first aspect, the embodiment of the present application provides a signal transmission method applied to an outdoor unit, the method comprising: receiving a first user message from an indoor unit through a digital signal transmission line, and the first user message includes a first digital signal; acquire the first digital signal from the first user message; process the first digital signal into a first radio frequency signal; and send the first radio frequency signal to a peer outdoor unit through an antenna.

In the second aspect, the embodiment of the present application provides a signal transmission method, which is applied to an outdoor unit, and the method includes: receiving a third radio frequency signal sent by the opposite outdoor unit from the antenna; processing the third radio frequency signal into a third digital signal; generate a second user message, the second user message includes a third digital signal; and send the second user message to the indoor unit through a digital signal transmission line.

In the third aspect, the embodiment of the present application provides a signal transmission method, which is applied to an indoor unit, and the method includes: acquiring user data; performing downlink bit-level processing on the user data to obtain a first digital signal; generating a first user A message, the first user message includes the first digital signal; and sending the first user message to the outdoor unit through a digital signal transmission line.

In a fourth aspect, an embodiment of the present application provides a signal transmission method applied to an indoor unit, the method comprising: receiving a second user message from an outdoor unit through a digital signal transmission line, and the second user message includes a bit-level a third digital signal; acquiring the third digital signal from the second user packet; and performing uplink bit-level processing on the third digital signal to obtain user data.

In a fifth aspect, the embodiment of the present application provides an outdoor unit, including: a first sending processing module, configured to receive a first user message from an indoor unit through a digital signal transmission line, and process the first user message into a second A radio frequency signal, wherein the first user message includes a first digital signal; a first receiving processing module, configured to receive a third radio frequency signal sent by an outdoor unit at the opposite end from the antenna, and process the third radio frequency signal into A second user message, where the second user message includes a third digital signal; and an antenna, configured to send the first radio frequency signal to a peer outdoor unit, and receive a third radio frequency signal sent by the peer outdoor unit .

In a sixth aspect, the embodiment of the present application provides an indoor unit, including a second sending processing module, configured to: acquire user data, perform downlink bit-level processing on the user data, and obtain a first digital signal; generate a digital signal including the second A first user message of a digital signal; and sending the first user message to the outdoor unit through a digital signal transmission line. The indoor unit also includes a second receiving processing module, configured to: receive a second user message from the outdoor unit through a digital signal transmission line, the second user message includes a bit-level third digital signal; Obtaining the third digital signal from a user message; and performing uplink bit-level processing on the third digital signal to obtain user data.

In a seventh aspect, the embodiment of the present application provides a microwave transmission system, which includes the above-mentioned outdoor unit and the above-mentioned indoor unit.

In an eighth aspect, the embodiment of the present application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the computer program, the application is implemented. The signal transmission method provided by the embodiment.

In a ninth aspect, the embodiment of the present application provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, implements the signal transmission method provided in the embodiment of the present application.

Additional features and advantages of the application will be set forth in the description which follows, and, in part, will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description, claims as well as the appended drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solution of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical solution of the present application, and do not constitute a limitation to the technical solution of the present application.

Fig. 1 is a schematic structural diagram of a traditional microwave point-to-point communication device;

FIG. 2 is a schematic flowchart of a signal transmission method provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a specific implementation process of step S1300 in FIG. 2;

FIG. 4 is a schematic diagram of a specific implementation process of step S1310 in FIG. 3;

FIG. 5 is a schematic flowchart of another signal transmission method provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of a specific implementation process of step S2200 in FIG. 5;

FIG. 7 is a schematic diagram of a specific implementation process of step S2220 in FIG. 6;

FIG. 8 is a schematic flowchart of another signal transmission method provided by an embodiment of the present application;

FIG. 9 is a schematic flowchart of another signal transmission method provided by an embodiment of the present application;

Fig. 10 is a schematic structural diagram of an outdoor unit provided by an embodiment of the present application;

Fig. 11 is a schematic structural diagram of the first sending processing module in Fig. 10;

Fig. 12 is a schematic structural diagram of an indoor unit provided by an embodiment of the present application;

Fig. 13 is a schematic structural diagram of a microwave transmission system provided by an embodiment of the present application;

Fig. 14 is a schematic structural diagram of another microwave transmission system provided by an embodiment of the present application;

Fig. 15 is a schematic structural diagram of another microwave transmission system provided by an embodiment of the present application; and

FIG. 16 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

detailed description

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

It should be understood that in the description of the embodiments of the present application, if there are descriptions of "first", "second", etc., it is only for the purpose of distinguishing technical features, and should not be understood as indicating or implying relative importance or implicitly indicating The number of indicated technical features or implicitly indicates the order of the indicated technical features. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three kinds of relationships, for example, A and/or B may indicate that A exists alone, A and B exist simultaneously, or B exists alone. Among them, A and B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c or a and b and c, where a, b, c can be single, or Can be multiple.

In addition, the technical features involved in the various embodiments of the present application described below may be combined with each other as long as they do not constitute a conflict with each other.

The microwave communication (Microwave Communication) involved in the embodiment of the present application is a communication method that uses electromagnetic waves in the microwave and millimeter wave frequency bands for data transmission, and is widely used in various communication transmission networks. Since millimeter wave frequency spectrum resources are abundant and large bandwidth can be obtained at the same time, using millimeter wave for point-to-point communication has great advantages. As shown in Figure 1, in the actual network environment of major communication operators, since outdoor units and indoor units are mainly connected through intermediate frequency cables, increasing the frequency of radio frequency signals will bring great cable loss and affect signal transmission stability.

In related technologies, the method of increasing the signal transmission speed of microwave communication is to perform multiple frequency mixing operations on the RF signal in the outdoor unit, thereby increasing the frequency of the RF signal. This solution has many shortcomings: the RF link in the multi-stage frequency conversion architecture The structure is very complex, the difficulty of debugging the equipment is increased, and the problem of in-band flatness is serious, and the stability of signal transmission is difficult to guarantee. It can be seen that, in the related art, there is no effective solution for improving the signal transmission speed and stability of microwave communication.

Based on the above, the embodiments of the present application provide a signal transmission method, an outdoor unit, an indoor unit, a microwave transmission system, electronic equipment, and a computer-readable storage medium. Signal transmission is performed between the indoor unit and the outdoor unit through a digital signal transmission line, which can effectively Improve the signal transmission speed between the indoor unit and the outdoor unit, reduce the cable loss caused by high-frequency signals, simplify the RF link structure of the microwave transmission system, and achieve the purpose of improving the signal transmission speed and stability of microwave communication .

Please refer to FIG. 2 , which shows a flow of a signal transmission method applied to an outdoor unit 100 provided by an embodiment of the present application. As shown in FIG. 2, the signal transmission method of the embodiment of the present application is applied to the outdoor unit 100, and includes the following steps:

S1100. Receive a first user packet from the indoor unit 200 through the digital signal transmission line 300, where the first user packet includes a first digital signal.

It should be understood that the first user message may be an Ethernet message, an Internet Protocol (Internet Protocol, IP) message, a Transmission Control Protocol (Transmission Control Protocol, TCP) message, a User Datagram Protocol (User Datagram Protocol, UDP) A message or a message in other formats, the first digital signal can be encapsulated in the first user message through various protocols.

Exemplarily, the digital signal transmission line 300 may be an optical fiber, a network cable or other cables capable of digital signal transmission. Compared with the traditional radio frequency cable transmission, the first user message is transmitted through optical fiber or network cable, which can not only effectively eliminate the bandwidth limitation of the radio frequency cable, but also realize the high-speed transmission of the first user message; at the same time, use the optical fiber or network cable to The distance between the indoor unit 200 and the outdoor unit 100 effectively solves the problems of large joint loss and insufficient transmission distance of the traditional IF cable, and improves the connection flexibility and convenience of the indoor unit 200 and the outdoor unit 100 .

S1200. Acquire a first digital signal from a first user packet.

Since the first user message is a protocol message, which contains a header, payload bytes and other functional fields, it is necessary to decapsulate the first user message to obtain a bit-level first digital signal. Exemplarily, the first user message is in Ethernet frame format, then the first user message includes content such as destination address, source address, type, data and frame inspection sequence, and the first user message is processed by obtaining the processing protocol in the type The packet is decapsulated to obtain the data content and obtain the first digital signal.

S1300. Process the first digital signal into a first radio frequency signal.

Referring to Fig. 3, the processing of the first digital signal into the first radio frequency signal can be realized through the following steps:

S1310. Perform downlink front-end processing on the first digital signal to obtain a second radio frequency signal.

Referring to Fig. 4, performing downlink front-end processing on the first digital signal to obtain the second radio frequency signal can be achieved through the following steps:

S1311. Perform mapping and interpolation processing on the bit-level first digital signal to obtain a symbol-level second digital signal.

In order to convert the first digital signal at the bit level into the second digital signal at the symbol level, bit stream information in the first digital signal needs to be mapped. That is, according to the determined mapping relationship table, the bit stream of the first digital signal is mapped to the second digital signal in the form of symbols; at the same time, in order to match the sampling rate of the first digital signal and the second digital signal, interpolation processing is also performed on it , forming a second digital signal.

S1312. Perform digital downlink intermediate frequency processing on the second digital signal to obtain a first digital intermediate frequency signal.

Since the frequency spectrum component of the second digital signal is large and there is a lot of invalid channel information, these redundant channel information will interfere with useful channel information and also affect the transmission speed of the second digital signal. Modulating the second digital signal to the intermediate frequency can effectively eliminate invalid information and avoid the occurrence of large spurs and severe distortion during subsequent processing of the second digital signal.

S1313. Perform digital-to-analog conversion on the first digital intermediate frequency signal to obtain a second radio frequency signal.

In order to transmit the first digital intermediate frequency signal by means of microwaves, it needs to be frequency-converted to a carrier of a certain frequency band. This requires digital-to-analog conversion of the first digital intermediate frequency signal, that is, converting discrete sampling values in the first digital intermediate frequency signal into continuous analog values to form a second radio frequency signal. Exemplarily, firstly, the first digital intermediate frequency signal is decoded, that is, the digital signal is converted into a corresponding level to form a ladder-shaped signal, and then low-pass filtered to form a continuous analog signal.

S1320. Perform downlink radio frequency processing on the second radio frequency signal to obtain the first radio frequency signal, including:

Filter, attenuate and amplify the second radio frequency signal to obtain the first radio frequency signal.

Please refer to FIG. 14 , which shows a schematic structural diagram of another microwave transmission system provided by an embodiment of the present application. The first radio frequency signal is a C-band (frequency range of 4-8 GHz) signal, and the frequency range of the current digital-to-analog conversion subunit 115 can cover the output frequency range of 100 MHz to 9 GHz, so the first digital intermediate frequency signal after digital-to-analog conversion It can directly output the C-band signal without FM processing on the second radio frequency signal. In order to ensure the transmission efficiency of the second radio frequency signal, it needs to be filtered, that is, the frequency outside the C band in the second radio frequency signal is effectively filtered to obtain a radio frequency signal of a specific frequency (C band); in order to improve signal transmission For the stability and protection of the back-end equipment, it is necessary to reduce the power of the second radio frequency signal, that is, to attenuate the filtered second radio frequency signal, so that the second radio frequency signal is attenuated to a certain ratio and reach a safe or ideal level The value is convenient for debugging; finally, in order to improve the long-distance transmission of the second radio frequency signal, it needs to be amplified to a sufficiently high power level, that is, the power of the attenuated second radio frequency signal is amplified.

In addition, step S1320 can also be realized by the following steps: first-stage filtering, first-stage amplification, first-stage attenuation, frequency up-conversion, second-stage attenuation, second-stage filtering, and second-stage amplification of the second radio frequency signal processing to obtain a first radio frequency signal.

Please refer to FIG. 15 , which shows a schematic structural diagram of another microwave transmission system provided by an embodiment of the present application. The first radio frequency signal is K-band (frequency range 18-27GHz) or Ku-band (frequency range 12-18GHz) signal, because the first digital intermediate frequency signal cannot directly output K-band signal and Ku-band signal after digital-to-analog conversion , it needs to be up-converted. Therefore, for the K-band signal and the Ku-band signal, it is necessary to perform up-conversion processing on the second radio frequency signal to increase the frequency of the second radio frequency signal to the K-band or Ku-band. In order to ensure the transmission efficiency of the second radio frequency signal and suppress the image frequency, it needs to be processed by first-stage filtering, first-stage amplification, and first-stage attenuation. Second-stage filtering and second-stage amplification processing, and finally obtain the first radio frequency signal of the corresponding frequency.

Exemplarily, the first radio frequency signal is an E-band (frequency range of 60-90GHz) signal or a higher frequency radio frequency signal, in order to ensure the filtering effect and suppress the image frequency, it is necessary to perform secondary frequency conversion processing on the second radio frequency signal, That is, several times of up-conversion processing are added to the processing of K-band signals and Ku-band signals, and corresponding filtering, attenuation and amplification processing are performed. For specific implementation methods, please refer to the previous related descriptions about K-band signal and Ku-band signal processing. I won't repeat them here.

S1400. Send the first radio frequency signal to the opposite outdoor unit 100 through the antenna 130 .

It should be understood that after the first radio frequency signal is formed, the outdoor unit 100 at the local end sends the first radio frequency signal to the outdoor unit 100 at the opposite end in the form of microwaves through the antenna 130 to complete the signal sending process.

Please refer to FIG. 5 , which shows a flow of a signal transmission method applied to the outdoor unit 100 provided by the embodiment of the present application. As shown in FIG. 5, the signal transmission method of the embodiment of the present application is applied to the outdoor unit 100, and includes the following steps:

S2100. Receive, from the antenna 130, a third radio frequency signal sent by the peer outdoor unit 100.

It should be understood that the local outdoor unit 100 receives the third radio frequency signal transmitted in the form of microwaves through the antenna 130, and transmits it to the local outdoor unit 100 for signal processing;

S2200. Process the third radio frequency signal into a third digital signal.

Referring to Fig. 6, processing the third radio frequency signal into a third digital signal can be realized through the following steps:

S2210. Perform uplink radio frequency processing on the third radio frequency signal to obtain a fourth radio frequency signal, including:

Amplify, attenuate and filter the third radio frequency signal to obtain a fourth radio frequency signal.

Please refer to FIG. 14 , which shows a schematic structural diagram of another microwave transmission system provided by an embodiment of the present application. The third radio frequency signal is a C-band (frequency range is 4-8GHz) signal, and the frequency range of the current digital-to-analog conversion subunit 115 can cover the output frequency range of 100MHz～9GHz, so the digital-to-analog conversion subunit 115 can be used for the third The digital-to-analog conversion is performed on the radio frequency signal without performing frequency modulation processing on the third radio frequency signal. Since the third radio frequency signal is transmitted over a long distance, attenuation occurs and its power drops, so it needs to be amplified to a sufficiently high power level, that is, the power of the third radio frequency signal is amplified; in order to improve the stability of signal transmission and To protect the back-end equipment, it is necessary to reduce the power of the third radio frequency signal, that is, to attenuate the filtered third radio frequency signal, so that the third radio frequency signal is attenuated to a certain ratio multiple to reach a safe or ideal level value, which is convenient for debugging Work; in order to ensure the transmission efficiency of the third radio frequency signal, it also needs to be filtered, that is, to effectively filter out the frequencies other than the C band in the third radio frequency signal, and obtain a radio frequency signal of a specific frequency (C band).

In addition, step S2210 may also be implemented by the following steps: performing first-stage amplification, first-stage filtering, first-stage attenuation, down-conversion, second-stage attenuation, second-stage amplification, and second-stage filtering on the third radio frequency signal processing to obtain a fourth radio frequency signal.

Please refer to FIG. 15 , which shows a schematic structural diagram of another microwave transmission system provided by an embodiment of the present application. The third radio frequency signal is a K-band (frequency range of 18-27GHz) signal or a Ku-band (frequency range of 12-18GHz) signal. Since the frequency range of the digital-to-analog conversion subunit 115 can cover the output frequency range of 100MHz～9GHz, so The digital-to-analog conversion subunit 115 cannot directly process K-band signals and Ku-band signals, and needs to perform down-conversion processing on them. Therefore, for the K-band signal and the Ku-band signal, it is necessary to perform frequency down-conversion processing on the third radio frequency signal to reduce the frequency of the third radio frequency signal to an intermediate frequency. In order to ensure the transmission efficiency of the third radio frequency signal and suppress the image frequency, it needs to be subjected to first-stage amplification, first-stage filtering and first-stage attenuation processing. Second-stage amplification and second-stage filtering processing, and finally a fourth radio frequency signal of a corresponding frequency is obtained.

Exemplarily, the third radio frequency signal is an E-band (frequency range of 60-90GHz) signal or a higher frequency radio frequency signal. In order to ensure the filtering effect and suppress the image frequency, it is necessary to perform secondary frequency conversion processing on the third radio frequency signal, namely In the process of K-band signal and Ku-band signal processing, several times of down-conversion processing are added, and corresponding filtering, attenuation and amplification processing are performed. For the specific implementation method, please refer to the relevant description of K-band signal and Ku-band signal processing. I won't repeat them here.

S2220. Perform uplink front-end processing on the fourth radio frequency signal to obtain a third digital signal.

Please refer to Figure 7, the uplink front-end processing is performed on the fourth radio frequency signal to obtain the third digital signal, which can be realized by the following steps:

S2221. Perform digital-to-analog conversion on the fourth radio frequency signal to obtain a symbol-level fourth digital signal;

In order to transmit the fourth radio frequency signal as a data packet, it needs to be converted into discrete sampling values. This requires digital-to-analog conversion of the fourth radio frequency signal, that is, converting continuous analog values in the fourth radio frequency signal into discrete sampling values to form a fourth digital signal. Exemplarily, the fourth radio frequency signal is first sampled, that is, samples of the analog signal are sampled at equal intervals, so that the continuous signal becomes a discrete signal; The sample value is transformed into the nearest digital value, indicating the size of the sample value; finally, these digital values are encoded, that is, the quantized value is represented by a set of binary numbers to form a data message.

S2222. Perform digital intermediate frequency processing on the fourth digital signal to obtain a symbol-level second digital intermediate frequency signal;

Since the spectrum components of the fourth digital signal are large, and there is a lot of invalid channel information, these redundant channel information will interfere with useful channel information, and will also affect the transmission and processing speed of the fourth digital signal. Modulating the fourth digital signal to an intermediate frequency can effectively eliminate invalid information and avoid the occurrence of large spurs and severe distortion during subsequent processing of the fourth digital signal.

S2223. Perform demapping and extraction processing on the second digital intermediate frequency signal at the symbol level to obtain a third digital signal at the bit level.

Since the second digital intermediate frequency signal has a carrier frequency, in order to convert the second digital intermediate frequency signal at the symbol level into a bit level

The third digital signal of the second digital intermediate frequency signal needs to be demapped, and the second digital intermediate frequency signal at the symbol level is demapped into a signal bit stream; at the same time, in order to match the sampling of the second digital intermediate frequency signal and the third digital signal rate, it also needs to be decimated to form a third digital signal.

S2300. Generate a second user packet, where the second user packet includes a third digital signal.

It should be understood that the second user message can be an Ethernet message, an IP message, a TCP message, a UDP message or a message in other formats, and the third digital signal can be encapsulated in the second user message through various protocols .

S2400. Send the second user message to the indoor unit 200 through the digital signal transmission line 300.

Exemplarily, the digital signal transmission line 300 may be an optical fiber, a network cable or other cables capable of digital signal transmission. Compared with the traditional radio frequency cable transmission, the second user message is transmitted through optical fiber or network cable, which can not only effectively eliminate the bandwidth limitation of the radio frequency cable, but also realize the high-speed transmission of the second user message; at the same time, use the optical fiber or network cable to The distance between the indoor unit 200 and the outdoor unit 100 effectively solves the problems of large joint loss and insufficient transmission distance of the traditional IF cable, and improves the connection flexibility and convenience of the indoor unit 200 and the outdoor unit 100 .

Please refer to FIG. 8 , which shows a flow of a signal transmission method applied to the indoor unit 200 provided by the embodiment of the present application. As shown in FIG. 8, the signal transmission method of the embodiment of the present application is applied to the indoor unit 200, and includes the following steps:

S3100, acquiring user data;

S3200. Perform downlink bit-level processing on user data to obtain a first digital signal;

Exemplarily, performing downlink bit-level processing on user data includes: sequentially performing a downlink protection switching operation, a downlink check code operation, an encoding operation, a scrambling operation, and a framing operation on the user data.

It should be understood that the downlink protection switching, as a backup protection function, acts on the mutual switching between the working single board and the backup single board of the indoor unit 200 and the outdoor unit 100, so as to avoid the interruption of signal transmission caused by the failure of the working single board to switch to the backup single board. . The downlink check code operation adopts Low Density Parity Check Code (LDPC), which has a high simulation effect. Through the encoding operation, the user data is converted into a bit-level signal. The scrambling operation is to perform random processing on the bit-level signal. In order to avoid the occurrence of long consecutive 0s or consecutive 1s in the user data and damage the performance of the timing loop of the outdoor unit 100, both the payload and the control information in the bit-level signal are scrambled. scrambling processing. Finally, the bit-level signal is subjected to a framing operation, that is, channels are assigned or marked in the bit-level signal to obtain the first bit-level digital signal.

S3300. Generate a first user message, where the first user message includes a first digital signal;

S3400. Send the first user packet to the outdoor unit 100 through the digital signal transmission line 300.

Please refer to FIG. 9 , which shows a flow of a signal transmission method applied to the indoor unit 200 provided by the embodiment of the present application. As shown in FIG. 9, the signal transmission method of the embodiment of the present application is applied to the indoor unit 200, and includes the following steps:

S4100. Receive a second user packet from the outdoor unit 100 through the digital signal transmission line 300, where the second user packet includes the ratio

Premium third digital signal;

S4200. Acquire the third digital signal from the second user message;

S4300. Perform uplink bit-level processing on the third digital signal to obtain user data.

Exemplarily, performing uplink bit-level processing on the third digital signal includes: sequentially performing a deframing operation, a descrambling operation, a decoding operation, an uplink check code operation, and an uplink protection switching operation on the third digital signal.

It should be understood that the deframing operation, descrambling operation and decoding operation are performed on the third digital signal at the bit level to convert it into a bit-level signal; in order to ensure the simulation effect of the bit-level signal, the uplink check code operation also uses LDPC; finally, in order to ensure Backup and protection function of user data, perform uplink protection switching operation on it.

The signal transmission method provided by the embodiment of the present application can effectively improve the connection flexibility between the indoor unit 200 and the outdoor unit 100, effectively reduce loss, and improve the signal transmission speed and transmission stability between the indoor unit 200 and the outdoor unit 100 sex.

Referring to FIG. 10, FIG. 10 is a schematic structural diagram of an outdoor unit 100 provided by an embodiment of the present application. The entire process of the signal transmission method provided by an embodiment of the present application involves the following modules in the outdoor unit 100: the first sending processing module 110, the second A reception processing module 120 and an antenna 130 .

Wherein, the first sending processing module 110 is configured to receive the first user message from the indoor unit 200 through the digital signal transmission line 300, and process the first user message into a first radio frequency signal, wherein the first user message includes the first Digital signal;

The first receiving processing module 120 is configured to receive from the antenna 130 a third radio frequency signal sent by the opposite outdoor unit 100, and process the third radio frequency signal into a second user message, where the second user message includes a third digital signal;

The antenna 130 is configured to send the first radio frequency signal to the opposite outdoor unit 100 and receive the third radio frequency signal sent by the opposite outdoor unit 100 .

Referring to FIG. 11, FIG. 11 is a schematic structural diagram of the first sending processing module 110. The first sending processing module 110 provided in the embodiment of the present application includes:

The digital front-end unit 111 includes: a symbol-level processing subunit 113, which performs mapping and interpolation processing on the first digital signal at the bit level to obtain a second digital signal at the symbol level; a downlink digital intermediate frequency processing subunit 114, which processes the second digital signal Downlink digital intermediate frequency processing to obtain a first digital intermediate frequency signal; the digital-to-analog conversion subunit 115 performs digital-to-analog conversion on the first digital intermediate frequency signal to obtain a second radio frequency signal;

The downlink radio frequency processing unit 112 is configured to perform downlink radio frequency processing on the second radio frequency signal to obtain the first radio frequency signal.

Exemplarily, a duplexer 140 is also connected between the first receiving processing module 120 and the antenna 130; the duplexer 140 is used to isolate the first radio frequency signal sent by the first sending processing module 110 from The third digital signal, to avoid the situation that the outdoor unit 100 spontaneously sends and receives.

It should be noted that the information interaction and execution process among the various modules in the above-mentioned outdoor unit 100 are based on the same idea as the method embodiment of the present application, and its specific functions and technical effects can be found in the method implementation. The example part is not repeated here.

Referring to FIG. 12, FIG. 12 is a schematic structural diagram of an indoor unit 200 provided in an embodiment of the present application. The indoor unit 200 provided in an embodiment of the present application includes:

The second transmission processing module 210 is used to obtain user data, perform downlink bit-level processing on the user data, and obtain the first digital signal; generate the first user message including the first digital signal; transmit the first user message through the digital signal transmission line 300 The message is sent to the outdoor unit 100;

The second receiving processing module 220 is configured to receive a second user message from the outdoor unit 100 through the digital signal transmission line 300, the second user message includes a bit-level third digital signal; obtain the third digital signal from the second user message ; Perform uplink bit-level processing on the third digital signal to obtain user data.

It should be noted that, since the information interaction and execution process among the various modules in the indoor unit 200 above are based on the same idea as the method embodiment of the present application, its specific functions and technical effects can be found in the method implementation The example part is not repeated here.

Referring to FIG. 13 , FIG. 13 is a schematic structural diagram of a microwave transmission system provided in an embodiment of the present application. The microwave transmission system provided in the embodiment of the present application includes the above-mentioned outdoor unit and indoor unit.

It should be noted that the information interaction and execution process among the various modules of the above-mentioned microwave transmission system are based on the same idea as the method embodiment of the present application, and its specific functions and technical effects can be found in the method embodiment. part, which will not be repeated here.

FIG. 16 shows an electronic device 500 provided by an embodiment of the present application. The electronic device 500 includes but is not limited to:

memory 501, for storing programs;

The processor 502 is configured to execute the program stored in the memory 501. When the processor 502 executes the program stored in the memory 501, the processor 502 is configured to execute the above signal transmission method.

The processor 502 and the memory 501 may be connected through a bus or in other ways.

As a non-transitory computer-readable storage medium, the memory 501 can be used to store non-transitory software programs and non-transitory computer-executable programs, such as the signal transmission method described in any embodiment of the present application. The processor 502 implements the above-mentioned signal transmission method by running the non-transitory software programs and instructions stored in the memory 501 .

The memory 501 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application program required by at least one function; the data storage area may store and execute the above-mentioned signal transmission method. In addition, the memory 501 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some implementations, the memory 501 may optionally include memories that are remotely located relative to the processor 502, and these remote memories may be connected to the processor 502 through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The non-transitory software programs and instructions required to implement the above-mentioned signal transmission method are stored in the memory 501, and when executed by one or more processors 502, the signal transmission method provided by any embodiment of the present application is executed.

The embodiment of the present application also provides a storage medium storing computer-executable instructions, and the computer-executable instructions are used to execute the above-mentioned signal transmission method.

In one embodiment, the storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more control processors 502, for example, executed by one of the processors 502 in the electronic device 500, so that the above-mentioned One or more processors 502 execute the signal transmission method provided by any embodiment of the present application.

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

In the embodiment of the present application, user data is obtained; downlink bit-level processing is performed on the user data to obtain a first digital signal; a first user message is generated, and the first user message includes the first digital signal; The signal transmission line sends the first user message to the outdoor unit; receives the first user message from the indoor unit through the digital signal transmission line, and obtains the first digital signal from the first user message; A digital signal is processed into a first radio frequency signal; and the first radio frequency signal is sent to the opposite outdoor unit through an antenna. The scheme of the embodiment of the present application enables signal transmission between the indoor unit and the outdoor unit through a digital signal transmission line, which can effectively increase the signal transmission speed between the indoor unit and the outdoor unit, and reduce the cable loss caused by high-frequency signals. Simplify the radio frequency link structure of the microwave transmission system, and then make the microwave communication meet the demand of large bandwidth and improve the stability of signal transmission.

Those skilled in the art can understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware and an appropriate combination thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit . Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. permanent, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, tape, magnetic disk storage or other magnetic storage devices, or can Any other medium used to store desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embody computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation, and those skilled in the art will not violate the spirit of the present application. Various equivalent deformations or substitutions can also be made under shared conditions, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

A signal transmission method applied to an outdoor unit, comprising:

receiving a first user message from the indoor unit through a digital signal transmission line, the first user message including a first digital signal;

Obtain the first digital signal from the first user message;

processing the first digital signal into a first radio frequency signal; and

Send the first radio frequency signal to the opposite outdoor unit through the antenna.
The method according to claim 1, wherein processing the first digital signal into a first radio frequency signal comprises:

performing downlink front-end processing on the first digital signal to obtain a second radio frequency signal; and

Perform downlink radio frequency processing on the second radio frequency signal to obtain the first radio frequency signal.
The method of claim 2, wherein the first digital signal is a bit-level signal; and

The performing downlink front-end processing on the first digital signal to obtain a second radio frequency signal includes:

performing mapping and interpolation processing on the first digital signal at the bit level to obtain a second digital signal at the symbol level;

performing digital downlink intermediate frequency processing on the second digital signal to obtain a first digital intermediate frequency signal; and

performing digital-to-analog conversion on the first digital intermediate frequency signal to obtain the second radio frequency signal.
The method according to claim 2, wherein said performing downlink radio frequency processing on said second radio frequency signal to obtain said first radio frequency signal comprises:

Filtering, attenuating and amplifying the second radio frequency signal to obtain the first radio frequency signal;

or,

performing first-stage filtering, first-stage amplification, first-stage attenuation, frequency up-conversion, second-stage attenuation, second-stage filtering, and second-stage amplification processing on the second radio frequency signal to obtain the first radio frequency signal.
A signal transmission method applied to an outdoor unit, comprising:

receiving a third radio frequency signal sent by the opposite outdoor unit from the antenna;

processing the third radio frequency signal into a third digital signal;

generating a second user message, the second user message including a third digital signal; and

Send the second user message to the indoor unit through a digital signal transmission line.
The method according to claim 5, wherein processing the third radio frequency signal into a third digital signal comprises:

performing uplink radio frequency processing on the third radio frequency signal to obtain a fourth radio frequency signal; and

Perform uplink front-end processing on the fourth radio frequency signal to obtain the third digital signal.
The method according to claim 6, wherein performing uplink radio frequency processing on the third radio frequency signal to obtain the fourth radio frequency signal comprises:

amplifying, attenuating, and filtering the third radio frequency signal to obtain the fourth radio frequency signal;

or,

performing first-stage amplification, first-stage filtering, first-stage attenuation, down-conversion, second-stage attenuation, second-stage amplification, and second-stage filtering processing on the third radio frequency signal to obtain the fourth radio frequency signal.
The method according to claim 6, wherein said performing uplink front-end processing on said fourth radio frequency signal to obtain said third digital signal comprises:

performing digital-to-analog conversion on the fourth radio frequency signal to obtain a symbol-level fourth digital signal;

performing digital intermediate frequency processing on the fourth digital signal to obtain a symbol-level second digital intermediate frequency signal; and

performing demapping and extraction processing on the second digital intermediate frequency signal at the symbol level to obtain the third digital signal at the bit level.
A signal transmission method applied to an indoor unit, comprising:

obtain user data;

performing downlink bit-level processing on the user data to obtain a first digital signal;

generating a first user message, the first user message including the first digital signal; and

Send the first user message to the outdoor unit through a digital signal transmission line.
The method according to claim 9, wherein said performing downlink bit-level processing on said user data comprises: sequentially performing downlink protection switching operation, downlink check code operation, encoding operation, and scrambling operation on said user data and framing operations.
A signal transmission method applied to an indoor unit, comprising:

receiving a second user message from the outdoor unit through a digital signal transmission line, where the second user message includes a bit-level third digital signal;

obtaining the third digital signal from the second user message; and

performing uplink bit-level processing on the third digital signal to obtain user data.
The method according to claim 11, wherein said performing uplink bit-level processing on said third digital signal to obtain user data comprises: sequentially performing deframing operation, descrambling operation, and decoding on said third digital signal operation, uplink check code operation and uplink protection switching operation.
An outdoor unit comprising:

The first sending processing module is configured to receive a first user message from an indoor unit through a digital signal transmission line, and process the first user message into a first radio frequency signal, wherein the first user message includes a first digital Signal;

The first receiving processing module is configured to receive a third radio frequency signal sent by the outdoor unit at the opposite end from the antenna, and process the third radio frequency signal into a second user message, and the second user message includes a third digital signal ;as well as

An antenna, configured to send the first radio frequency signal to the opposite outdoor unit, and receive a third radio frequency signal sent by the opposite outdoor unit.
The outdoor unit according to claim 13, wherein the first sending processing module comprises:

A digital front-end unit, configured to perform downlink front-end processing on the first digital signal to obtain a second radio frequency signal; and

The downlink radio frequency processing unit is configured to perform downlink radio frequency processing on the second radio frequency signal to obtain the first radio frequency signal.
The outdoor unit according to claim 14, wherein said first digital signal is a bit-level signal; and

The digital front-end unit includes:

The symbol-level processing subunit performs mapping and interpolation processing on the first digital signal at the bit level to obtain a second digital signal at the symbol level;

The downlink digital intermediate frequency processing subunit performs downlink digital intermediate frequency processing on the second digital signal to obtain the first digital intermediate frequency signal; and

The digital-to-analog conversion subunit performs digital-to-analog conversion on the first digital intermediate frequency signal to obtain the second radio frequency signal.
An indoor unit comprising:

The second sending processing module is used to obtain user data, perform downlink bit-level processing on the user data, and obtain a first digital signal; generate a first user message including the first digital signal; and transmit the user data through a digital signal transmission line The above-mentioned first user message is sent to the outdoor unit; and

The second receiving processing module is configured to receive a second user message from the outdoor unit through a digital signal transmission line, the second user message includes a bit-level third digital signal; obtain the first user message from the second user message Three digital signals; performing uplink bit-level processing on the third digital signal to obtain user data.
A microwave transmission system, comprising the outdoor unit according to any one of claims 13-15 and the indoor unit according to claim 16.
An electronic device, comprising: a memory, a processor, and a computer program stored on the memory and operable on the processor, when the processor executes the computer program, it realizes any one of claims 1 to 12 signal transmission method.
A computer-readable storage medium storing a computer program, wherein, when the computer program is executed by a processor, the signal transmission method according to any one of claims 1 to 12 is realized.