WO2023231406A1

WO2023231406A1 - Coupling device, signal equalization method and indoor distribution system

Info

Publication number: WO2023231406A1
Application number: PCT/CN2022/142945
Authority: WO
Inventors: 余超; 车晓东; 肖扬; 李建光; 林衡华; 黄庆涛; 熊尚坤
Original assignee: 中国电信股份有限公司
Priority date: 2022-05-30
Filing date: 2022-12-28
Publication date: 2023-12-07
Also published as: CN115021775B; CN115021775A

Abstract

The present disclosure provides a coupling device, a signal equalization method and an indoor distribution system, and relates to the technical field of wireless communications. The coupling device comprises: a four-port coupler comprising an input port, a coupling port, an output port, an isolation port and a system coupling port, and configured to perform power equalization processing on an input signal, wherein the input signal comprises a coupling signal and a through connect signal; a low-noise amplifier unit connected between the coupling port and the system coupling port and configured to perform signal amplification processing on the coupling signal; and an energy conversion unit, wherein two ends of the energy conversion unit are respectively connected to the isolation port and the low-noise amplifier unit, and the energy conversion unit is configured to convert a radio frequency signal of the isolation port into electric energy to provide electric energy for the low-noise amplifier unit. According to the coupling device, reverse insertion loss of the coupling device is reduced, the uplink noise coefficient is reduced, and the uplink performance is improved.

Description

Coupling device, signal equalization method and indoor distribution system

This disclosure requires the priority of a Chinese invention patent application with an application date of May 30, 2022, an application number of 202210600866.0, and an invention title of "Coupling Device, Signal Equalization Method and Indoor Distribution System".

Technical field

The present disclosure relates to the field of wireless communication technology, and in particular, to a coupling device, a signal equalization method and an indoor distribution system.

Background technique

In the passive indoor distribution system, most of the input signals from the ordinary coupler are transmitted to the isolation port and absorbed by the matching load, resulting in large uplink insertion loss and high coupler reverse loss. The passive indoor distribution system High noise figure and poor uplink performance.

Therefore, there is an urgent need for a method to solve the problems of high noise coefficient, poor uplink performance, and poor signal transmission quality of indoor distribution systems in current passive indoor distribution systems.

It should be noted that the information disclosed in the above background section is only used to enhance understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to those of ordinary skill in the art.

Contents of the invention

The purpose of this disclosure is to provide a coupling device, a signal equalization method and an indoor branch system, which at least to a certain extent overcome the problem of poor uplink performance due to limitations of related technologies.

Additional features and advantages of the disclosure will be apparent from the following detailed description, or, in part, may be learned by practice of the disclosure.

According to an aspect of the present disclosure, a coupling device is provided, including: a four-port coupler, including an input port, a coupling port, an output port, an isolation port and a system coupling port, configured to perform power equalization processing on an input signal; wherein, The input signal includes a coupling signal and a pass-through signal; a low-noise amplification unit, the low-noise amplification unit is connected between the coupling port and the system coupling port, and is configured to perform signal amplification processing on the coupling signal; energy conversion unit, the two ends of the energy conversion unit are respectively connected to the isolation port and the low-noise amplifier unit, and are configured to convert the radio frequency signal of the isolation port into electrical energy to provide electrical energy to the low-noise amplifier unit.

In one embodiment of the present disclosure, the device further includes: a primary circulator including a first port, a second port and a third port; a secondary circulator including a first port, a second port and a third port; Wherein, the first port of the primary circulator is connected to the coupling port, the second port of the primary circulator is connected to the system coupling port, and the third port of the primary circulator is connected to the secondary port. The first port of the circulator is connected, the second port of the secondary circulator and the third port of the secondary circulator are respectively connected to both ends of the low-noise amplifier unit.

In one embodiment of the present disclosure, the energy conversion unit includes an RF-DC conversion subunit and an energy storage subunit; wherein both ends of the RF-DC conversion subunit are respectively connected to the isolation port and the energy storage sub-unit, the energy storage sub-unit is connected to the low-noise amplifier unit.

In one embodiment of the present disclosure, when working in the forward direction, the four-port coupler receives a first coupling signal through the input port, and the four-port coupler is configured to process the first coupling signal to obtain a second coupling signal, the coupling port is configured to output the second coupling signal to the first-level circulator; the first-level circulator is configured to output the first coupling signal to the system coupling port.

In one embodiment of the present disclosure, when working in the forward direction, the four-port coupler receives a first through signal through the input port and outputs the first through signal through the output port.

In one embodiment of the present disclosure, when working in reverse, the four-port coupler receives a third coupling signal through the system coupling port; the third coupling signal passes through the primary circulator and the secondary The circulator is output to the low-noise amplifier unit; the low-noise amplifier unit is configured to perform signal amplification processing on the third coupled signal to obtain a fourth coupled signal; the fourth coupled signal passes through the secondary circulator and The first-level circulator outputs to the coupling port; the coupling port receives the fourth coupling signal and outputs the four-coupling signal through the input port.

In one embodiment of the present disclosure, when working in reverse, the four-port coupler receives a second pass-through signal through the output port, and outputs the second pass-through signal through the input port.

In one embodiment of the present disclosure, the RF-DC conversion subunit is configured to convert the acquired radio frequency signal of the isolation port into a DC signal; the energy storage subunit is configured to store the DC signal, and provide direct current to the low-noise amplifier unit.

According to another aspect of the present disclosure, a signal equalization method is provided, including: using the coupling device described in any one of the above to perform power equalization processing on the input signal of the indoor distribution system.

According to yet another aspect of the present disclosure, an indoor distribution system is provided, including a trunk amplifier, a combiner, a power splitter, an antenna, and any one of the coupling devices described above.

A coupling device provided by an embodiment of the present disclosure includes: a four-port coupler, a low-noise amplifier unit and an energy conversion unit. The four-port coupler includes input port, coupling port, output port, isolation port and system coupling port. The low-noise amplifier unit is connected between the coupling port and the system coupling port, and both ends of the energy conversion unit are connected to the isolation port and the low-noise amplifier unit respectively. The isolation port of the four-port coupler is connected to the energy conversion unit. The energy conversion unit converts the radio frequency signal at the isolation port into electrical energy and provides electrical energy for the low-noise amplification unit to meet the demand for low-noise amplification energy and achieve low-noise amplification gain. , to prevent the load from absorbing signals and reduce uplink losses, thereby reducing the uplink noise coefficient of the indoor distribution system and improving the uplink performance of the indoor distribution system.

It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and do not limit the present disclosure.

Description of the drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 shows a schematic structural diagram of a coupling device in an embodiment of the present disclosure.

FIG. 2 shows a schematic structural diagram of a four-port coupler of a coupling device in an embodiment of the present disclosure.

Figure 3 shows a schematic structural diagram of another coupling device in an embodiment of the present disclosure.

Figure 4 shows a schematic structural diagram of a circulator of a coupling device in an embodiment of the present disclosure.

FIG. 5 shows a schematic diagram of the signal flow of a coupling signal of a coupling device when working in the forward direction according to an embodiment of the present disclosure.

FIG. 6 shows a schematic diagram of the signal flow of a through signal of a coupling device when working in the forward direction according to an embodiment of the present disclosure.

FIG. 7 shows a schematic diagram of the signal flow of a coupling signal of a coupling device when working in reverse according to an embodiment of the present disclosure.

FIG. 8 shows a schematic diagram of the signal flow of a through signal of a coupling device when working in reverse according to an embodiment of the present disclosure.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concepts of the example embodiments. To those skilled in the art. The described features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar parts, and thus their repeated description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and/or processor devices and/or microcontroller devices.

A coupler is a power distribution device. The coupler couples out part of the energy from the signal, and the coupled energy is often used for signal detection or monitoring. The main purpose of using a coupler and a power splitter is to achieve one goal - to distribute the transmit power of the signal source to the various antenna ports of the indoor distribution system as evenly as possible, so that the transmit power of each antenna port is basically the same.

The important indicators of a coupler are coupling degree and insertion loss. The degree of coupling is the ratio of the power of the coupling port to the input port. Expressed in dB, it is generally a negative value. The greater the absolute value of the coupling degree, the less things are taken away, and the smaller the loss of the natural coupler. Insertion loss is the ratio of the power of the output port to the input port. The greater the absolute value of coupling, the smaller the absolute value of insertion loss. Insertion loss is the signal loss due to the insertion of cables or components, usually referred to as attenuation.

A circulator is a multi-port device that passes the incident wave entering any one of its ports into the next port in sequence according to the direction determined by the static bias magnetic field. A circulator, also called an isolator, is a non-reciprocal device with several terminals. Its distinctive feature is that it can transmit high-frequency signal energy in one direction.

The indoor distribution system is a successful solution for indoor user groups to improve the mobile communication environment in buildings; it uses relevant technical means to evenly distribute the signals of mobile communication base stations in every corner of the room, thereby ensuring that the indoor area has ideal signal coverage.

Figure 1 shows a schematic structural diagram of a coupling device according to an embodiment of the present disclosure. The device includes: a four-port coupler 100, including an input port 101, a coupling port 103, an output port 102, an isolation port 105 and a system coupling Port 104 is configured to perform power equalization processing on input signals; wherein the input signals include coupled signals and pass-through signals.

In some embodiments, the coupler provided in this embodiment is a four-port coupler. Figure 2 shows a schematic structural diagram of a four-port coupler. The four-port coupler 100 includes a leftmost input port 101 and a lower left coupling port. 103. The output port 102 at the right end, the isolation port 105 at the lower right end, and the system coupling port 104 configured to connect to the system. The coupling degree between the input port 101 and the coupling port 103 can be flexibly designed according to actual needs. For example, commonly used coupling degrees include 3dB, 5dB, 6dB, 7dB, 10dB and other types.

The four-port coupler is used to equalize the input signal. In actual operation, the input signal includes a through signal and a coupled signal. In this embodiment, during the forward signal transmission operation, the coupled signal is input from the input port 101 and coupled from the system. Port 104 output; in the forward signal transmission operation, the pass-through signal is input from the input port 101 and output from the output port 102. In the reverse signal transmission operation, the coupling signal is input from the system coupling port 104 and output from the input port 101; in the reverse signal transmission operation, the through signal is input from the input port 102 and output from the input port 101.

As shown in the schematic structural diagram of a coupling device, the device includes: a low-noise amplification unit 200. The low-noise amplification unit 200 is connected between the coupling port 103 and the system coupling port 104, and is configured to Coupled signals undergo signal amplification processing.

As shown in FIG. 1 , the port 201 of the low-noise amplifier unit is connected to the coupling port 103 , the port 202 of the low-noise amplifier unit is connected to the system coupling port 104 , and the low-noise amplifier unit port 203 is connected to the port 302 of the energy conversion unit 300 . Low-noise amplifier is a special type of electronic amplifier, which is mainly used in communication systems to amplify signals received from antennas to facilitate processing by subsequent electronic equipment. Since the signal from the antenna is generally very weak, low-noise amplifiers are usually located very close to the antenna to reduce the loss of the signal through the transmission line. Amplify the signal while producing the lowest possible noise and distortion. The low-noise amplification unit of this embodiment amplifies the coupled signal received from the antenna at the system coupling port 103 while generating the lowest possible noise and reducing signal loss.

As shown in the schematic structural diagram of a coupling device, the device includes: an energy conversion unit 300. Both ends of the energy conversion unit 300 are respectively connected to the isolation port 105 and the low-noise amplifier unit 200, and are configured to convert the The radio frequency signal at the isolation port 105 is converted into electrical energy to provide electrical energy for the low-noise amplifier unit 200 .

It is set as shown in Figure 1. The computing port 301 of the energy conversion unit 300 is connected to the isolation port 105. The port 302 of the energy conversion unit 300 is connected to the port 203 of the low-noise amplifier unit 200. The power supply of the low-noise amplifier unit 200 is provided by the energy conversion unit. Unit 300 available. If the coupling device of this embodiment is mainly set as the backbone coupling of the indoor distribution system, it is assumed that the power of the input port 101 is about 100w, the power of the isolation port 105 is greater than 300mW, and the uplink signal strength of the system coupling port 104 is generally -90dBm About 20dB is required for the low-noise amplifier gain, and the power required for the low-noise amplifier is about 200mW. According to the energy conversion efficiency of 70%, the energy provided by the energy conversion unit can meet the energy needs of the low-noise amplifier unit.

The coupling device in this embodiment includes a four-port coupler 100, a low-noise amplifier unit 200 and an energy conversion unit 300. The four-port coupler is used to equalize the input signal. The energy provided by the energy conversion unit can meet the energy of the low-noise amplifier unit. need. The coupled signal received by the low-noise amplifier unit amplifies the signal while producing the lowest possible noise and reducing signal loss. A low-cost, high-gain method is used to reduce the coupler reverse loss.

In one embodiment of the present disclosure, Figure 3 shows a schematic structural diagram of a coupling device. The device further includes: a primary circulator 210, including a first port 211, a second port 212 and a third port 213; a secondary circulator 210. The device 220 includes a first port 221, a second port 222 and a third port 223.

Among them, the first port 211 of the first-level circulator 210 is connected to the coupling port 103, and the second port 212 of the first-level circulator 210 is connected to the system coupling port 104. The first-level circulator 210 The third port 213 is connected to the first port 221 of the secondary circulator 220. The second port 222 of the secondary circulator 220 and the third port 223 of the secondary circulator 220 are respectively connected to the low noise amplifier. The two

ports

201 and 202 of the unit 200 are connected.

Figure 4 shows a schematic structural diagram of a circulator. A circulator has three ports: port 401, port 402, and port 403. In this embodiment, the primary circulator and the secondary circulator have three ports respectively. The circulator is a multi-port device that transfers the incident wave entering any port to the next port in sequence according to the direction determined by the static bias magnetic field. device. The outstanding feature is the one-way transmission of energy, which controls the transmission of electromagnetic waves along a certain circular direction. According to what is shown in Figure 4, in the circulator, the signal can only go from port 401 to port 403, from port 403 to port 402, from port 402 to port 401, and the other paths are blocked.

The configuration is as shown in FIG. 3 . In this implementation, a two-stage circulator is used. The first-stage circulator 210 is connected between the coupling port 103 and the system coupling port 104 . The third port 213 of the first-stage circulator 210 is connected to the second-stage circulator. The first-stage circulator 220 is connected, and the two ends of the second-stage circulator 220 are connected to the two ends of the low-noise unit 200 respectively. It is configured that during the forward signal transmission process, the signal output from the coupling port 103 of the four-port coupler 100 is controlled by the first-level circulator 330 and then output to the system coupling port 104 in one direction. During the reverse signal transmission process, the signal is input from the system coupling port 103 and then passes through the first-level circulator 210 and the second-level circulator 220 to adjust the signal transmission direction before being input to the low-noise amplifier unit 200 . The circulator added in this embodiment has low incremental loss, so the coupling degree of the coupling device in this embodiment is equivalent to that of a traditional coupler, and the incremental loss is almost negligible.

In one embodiment of the present disclosure, as shown in the schematic structural diagram of the coupling device in Figure 3, the energy conversion unit includes an RF-DC conversion sub-unit 310 and an energy storage sub-unit 320; wherein, the RF-DC conversion sub-unit 310 Port 311 is connected to the isolation port 105, port 312 is connected to the port 321 of the energy storage sub-unit 320, and the port 322 of the energy storage sub-unit 320 is connected to the port 203 of the low-noise amplifier unit 200.

This embodiment is configured to use a radio frequency-direct current (RF-DC, Radio Frequency-Direct Current) conversion sub-unit 310 and an energy storage sub-unit 320 to provide power by using radio frequency energy. The source of the radio frequency signal is received by the isolation port 105 through the antenna. The RF-DC conversion subunit 310 converts the radio frequency signal from the isolation port 105 of the four-port coupler into DC power. The energy storage subunit 320 stores the power. And the energy storage subunit 320 can provide energy for low power consumption applications. Among them, antennas that transmit radio frequency signals include mobile phones, TVs, WIFI routers, etc. In this embodiment, the energy storage subunit 320 is used to supply power to the low-noise amplification unit 200, amplify weak signals, and reduce noise interference on signals, taking into account the requirements of low noise and high gain. Among them, the strength of the RF signal is equal to the input port signal level minus the isolation, and the final result is the RF signal strength.

Among them, the isolation degree refers to the isolation between the output port and the coupling port, which varies according to the coupling degree. Isolation is a constant interference measure taken to reduce the impact of various interferences on the receiver. For the isolation of the input port and the output port, the larger the value, the better, which means the smaller the interference between them.

Usually, the coupler matches the load at the isolation port and absorbs the feed energy. The isolation port in this embodiment converts the RF energy into DC power for low-noise amplifier use.

In one embodiment of the present disclosure, FIG. 5 shows a schematic diagram of the signal flow of a coupling signal of a coupling device when it is working in the forward direction.

When working in the forward direction, the four-port coupler 100 receives a first coupling signal through the input port 101, and the four-port coupler 100 is configured to process the first coupling signal to obtain a second coupling signal. The port 103 is configured to output the second coupling signal to the first-stage circulator 210 ; the first-stage circulator is configured to output the first coupling signal to the system coupling port 104 .

The situation of forward operation is the process of forward signal transmission, usually the transmission process of downlink signals. The specific situation is that the coupling signal is input from the input port 101 of the four-port coupler 100, then output through the coupling port 103 of the four-port coupler, and then input into the first-level ring 210 through the 211 port of the first-level circulator 210 for signal processing. After the transmission direction is controlled, it is output from port 212, and then output from system coupling port 104.

A circulator is added to the coupling channel in this embodiment, but the incremental loss of the circulator is low, so the coupling degree of the coupling channel is equivalent to that of a traditional coupler, without any increase in loss.

In one embodiment of the present disclosure, FIG. 6 shows a schematic diagram of the signal flow of a straight-through signal of a coupling device when working in the forward direction.

When working in the forward direction, the four-port coupler 100 receives the first through signal through the input port 101 and outputs the first through signal through the output port 102 .

In the process of forward signal transmission, the straight-through signal of the straight-through channel is input from the input port 101 of the four-port coupler 100 and is output from the output port 102 after passing through the coupler. Therefore, the straight-through channel is consistent with the traditional coupler. The channel loss is also consistent with the traditional coupler, with no increase in loss.

In one embodiment of the present disclosure, FIG. 7 shows a schematic diagram of the signal flow of a coupling signal of a coupling device when working in reverse.

When working in reverse, the four-port coupler 100 receives a third coupling signal through the system coupling port 104; the third coupling signal is output to the primary circulator 210 and the secondary circulator 220 through the The low-noise amplification unit 200; the low-noise amplification unit is configured to perform signal amplification processing on the third coupled signal to obtain a fourth coupled signal; the fourth coupled signal passes through the secondary circulator 220 and the The first-level circulator 210 outputs to the coupling port 103; the coupling port 103 receives the fourth coupled signal and outputs the four-coupled signal through the input port 101.

The situation set to reverse operation is the process of reverse signal transmission, usually the transmission process of uplink signals. The coupling signal is reversely input from the system coupling port 104, then first passes through the port 212 of the primary circulator 210, and then outputs from the port 213, and then passes through the 221 port of the secondary circulator 220 to the secondary circulator 220, and is output from the port 223 To the port 202 of the low-noise amplifier unit 200, the signal is input to the low-noise amplifier unit 200 through the 202 port of the low-noise amplifier unit 200 for signal amplification processing, and is output from the port 201 of the low-noise amplifier unit 200, and then first passes through the secondary circulator 220 The port 222 outputs from the port 221, and then passes through the port 213 of the first-level circulator 210, then outputs from the port 211, inputs the coupling port 103 of the four-port coupler, passes through the four-port coupler 100, and outputs from the input port 101.

For example, the coupling port signal is fed into the four-port coupler coupling port after passing through the low-noise amplifier unit. The low-noise amplifier uplink gain is 20dB. After subtracting the uplink loss of the four-port coupler coupling port (taking 15dB as an example), the uplink loss is less than 0dB, there is still 5dB gain.

Among them, the power of the low-noise amplifier unit is provided by the RF-DC conversion subunit and the energy storage subunit. If the low-noise amplifier gain is 20dB, the power required for the low-noise amplifier is about 200mW. According to the 70% conversion efficiency of the RF-DC conversion subunit The energy provided can meet the energy requirements of low noise amplifier. The solution of this embodiment can perform signal enhancement processing on the coupled signal, reduce noise and loss, reduce the noise coefficient of the uplink, improve the performance of the uplink, and reduce the reverse insertion loss.

In one embodiment of the present disclosure, FIG. 8 shows a schematic diagram of the signal flow of a through signal of a coupling device when working in reverse.

When working in reverse, the four-port coupler 100 receives the second pass-through signal through the output port 102 and outputs the second pass-through signal through the input port 101 .

During the reverse signal transmission process, the pass-through signal is first reversely input to the output port 102 of the four-port coupler 100, and then output from the input port 101 after passing through the four-port coupler 100. The reverse pass-through loss is comparable to that of a conventional coupler.

According to the working conditions provided by the above embodiments, taking a 5dB coupling device as an example, the forward insertion loss (dB): ≤2.1, and the standing wave ratio: ≤1.5. Reverse coupling port insertion loss (dB): ≤0, standing wave ratio: ≤1.5. Reverse output port insertion loss (dB): ≤2.1, standing wave ratio: ≤1.5.

The standing wave ratio can be defined as the ratio of the highest RF voltage through the transmission line to the minimum RF voltage. In telecommunications engineering, the impedance matching of the load to the transmission line impedance becomes the standing wave ratio. Once there is a difference in impedance, it will provide a standing wave through the transmission line and increase the loss in the transmission line. Usually the standing wave ratio is set to measure communication Line efficiency. The reading range of the standing wave ratio corresponds to the following situations. The standing wave ratio of 1-1.5 is considered to be the perfect value range. The standing wave ratio of 1.5-1.9 is not a perfect range, indicating that there is an installation fault. The standing wave ratio of 2.0-2.4. Not a very good range, indicating a poorly installed antenna etc. The greater the standing wave ratio, the greater the reflection, the worse the matching, and the lower the efficiency of signal transmission. The standing wave ratios of the above-mentioned 5dB coupling devices in this embodiment are all less than or equal to 1.5. It can be seen that the coupling device in this embodiment obtains a perfect standing wave ratio range.

Insertion loss refers to the value of the reduction in signal power from the coupler output to the output end, and then subtracts the value of the distribution loss. It varies according to the coupling degree of the coupler. Analyzing the above coupler insertion loss results, it can be seen that the insertion loss of the reverse coupling port is significantly lower than the insertion loss of the forward coupling port and the insertion loss of the reverse output port. Through the coupling of this embodiment According to the structural design of the device, this embodiment achieves a reduction in the reverse loss of the coupler.

In addition, the above embodiments reduce the noise figure of the uplink, improve the performance of the uplink, reduce the reverse insertion loss, and achieve high signal transmission efficiency.

In one embodiment of the present disclosure, the RF-DC conversion subunit is configured to convert the acquired radio frequency signal of the isolation port into a DC signal;

The energy storage subunit is configured to store the DC signal and provide DC power to the low-noise amplifier unit.

Combined with Figure 3, this embodiment uses a radio frequency-DC (Radio Frequency-Direct Current) conversion sub-unit 310 and an energy storage sub-unit 320 to provide power by using radio frequency energy. The source of the radio frequency signal is received by the isolation port 105 through the antenna. The RF-DC conversion subunit 310 converts the radio frequency signal from the isolation port 105 of the four-port coupler 100 into DC power, and the energy storage subunit 320 stores the power. , and the energy storage subunit 320 can provide energy for low-power applications. In this embodiment, the energy storage subunit is used to supply power to the low-noise amplification unit, amplify weak signals, and reduce noise interference on signals, taking into account the requirements of low noise and high gain.

In an indoor distribution system, the downlink is the wireless link from the base station to the mobile terminal, and the uplink is the wireless link from the mobile terminal to the base station. In mobile communication system network coverage, both uplink and downlink need to meet certain index requirements to achieve normal communication between base stations and mobile terminals. In the passive room distribution system, most of the signals input by the coupling port of the ordinary coupler are transmitted to the isolation port and absorbed by the matching load, resulting in large uplink insertion loss, high noise coefficient of the room distribution system, and poor uplink performance. The disclosed product reduces reverse insertion loss, reduces the uplink noise coefficient of the room subsystem, and improves the uplink performance of the passive room subsystem. For the downlink, since the base station has a large transmit power and can continuously increase the downlink transmit power, the downlink coverage of the base station is relatively easy to achieve; for the uplink, in general, the mobile terminal transmit power is small, and its maximum transmit power is certain, so the uplink coverage is often lacking, making the uplink signal quality unable to meet the requirements of normal communication, and the uplink performance is poor.

This embodiment uses a low-cost, high-gain method to reduce the reverse loss of the coupling device, thereby achieving signal equalization processing for the indoor distribution system.

In this embodiment, the above coupling device is used to implement power equalization processing of the input signal of the indoor distribution system. Wherein, the coupling device specifically includes: a four-port coupler, including an input port, a coupling port, an output port, an isolation port and a system coupling port, configured to perform power equalization processing on the input signal; wherein the input signal includes a coupled signal and a through signal; a low-noise amplification unit, the low-noise amplification unit is connected between the coupling port and the system coupling port, and is configured to perform signal amplification processing on the coupling signal; an energy conversion unit, both of the energy conversion units The terminals are respectively connected to the isolation port and the low-noise amplification unit, and are configured to convert the radio frequency signal of the isolation port into electrical energy to provide electrical energy to the low-noise amplification unit. In this embodiment, a four-port coupler is used to equalize the input signal, and the energy provided by the energy conversion unit can meet the energy demand of the low-noise amplifier unit. The coupled signal received by the low-noise amplifier unit amplifies the signal while producing the lowest possible noise and reducing signal loss. A low-cost, high-gain method is used to reduce the coupler reverse loss.

The indoor division system is divided into an active indoor division system and a passive indoor division system. This embodiment mainly refers to the passive indoor division system.

The indoor distribution system wirelessly introduces communications operator signals indoors to solve the indoor signal coverage problem. The indoor distribution system mainly distributes the signals provided by the signal sources so that the signal sources are evenly distributed to the coverage area. Indoor distribution systems mainly include: trunk amplifiers, combiners, power splitters, cables, antennas and the above-mentioned coupling devices. Among them, the trunk amplifier can amplify the power of the signal source to cover more areas when the signal source device is difficult to meet the coverage requirements. The combiner combines two or more signals into one signal output. Power divider is an equal power distribution device. Common ones include two-power divider, three-power divider, four-power divider, etc. An antenna is a device that converts radio frequency signals into wireless signals.

The coupler provided in the above embodiment is mainly used to gain the uplink signal, reduce noise and loss, reduce the reverse insertion loss of the uplink, reduce the noise coefficient of the uplink, and improve the uplink performance of the passive indoor distribution system. performance, improve the performance of the indoor distribution system, and the signal transmission efficiency of the indoor distribution system is high.

Through the above description of the embodiments, those skilled in the art can easily understand that the example embodiments described here can be implemented by software, or can be implemented by software combined with necessary hardware. Therefore, the technical solution according to the embodiment of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, U disk, mobile hard disk, etc.) or on the network , including several instructions to cause a computing device (which may be a personal computer, a server, a terminal device, a network device, etc.) to execute a method according to an embodiment of the present disclosure.

In an exemplary embodiment of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the method described above in this specification is stored. In some possible implementations, various aspects of the present disclosure can also be implemented in the form of a program product, which includes program code. When the program product is run on a terminal device, the program code is used to cause the The terminal device performs the steps according to various exemplary embodiments of the present disclosure described in the above "Example Method" section of this specification.

A program product for implementing the above method according to an embodiment of the present disclosure is described, which can adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a terminal device, such as a personal computer. However, the program product of the present disclosure is not limited thereto. In this document, a readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

The program product may take the form of any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: electrical connection with one or more conductors, portable disk, hard disk, random access memory (RAM), read only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.

A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave carrying readable program code therein. Such propagated data signals may take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A readable signal medium may also be any readable medium other than a readable storage medium that can send, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any suitable medium, including but not limited to wireless, wireline, optical cable, RF, etc., or any suitable combination of the foregoing.

Program code for performing operations of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages such as Java, C++, etc., as well as conventional procedural Programming language—such as "C" or a similar programming language. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server execute on. In situations involving remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device, such as provided by an Internet service. (business comes via Internet connection).

It should be noted that although several modules or units of equipment for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to embodiments of the present disclosure, the features and functions of two or more modules or units described above may be embodied in one module or unit. Conversely, the features and functions of one module or unit described above may be further divided into being embodied by multiple modules or units.

Furthermore, although various steps of the methods of the present disclosure are depicted in the drawings in a specific order, this does not require or imply that the steps must be performed in that specific order, or that all of the illustrated steps must be performed to achieve the desired results. result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step for execution, and/or one step may be decomposed into multiple steps for execution, etc.

Through the above description of the embodiments, those skilled in the art can easily understand that the example embodiments described here can be implemented by software, or can be implemented by software combined with necessary hardware. Therefore, the technical solution according to the embodiment of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, U disk, mobile hard disk, etc.) or on the network , including several instructions to cause a computing device (which may be a personal computer, a server, a mobile terminal, a network device, etc.) to execute a method according to an embodiment of the present disclosure.

Other embodiments of the disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure that follow the general principles of the disclosure and include common knowledge or customary technical means in the technical field that are not disclosed in the disclosure. . It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

A coupling device including:

The four-port coupler includes an input port, a coupling port, an output port, an isolation port and a system coupling port, and is configured to perform power equalization processing on the input signal; wherein the input signal includes a coupled signal and a through signal;

A low-noise amplification unit, the low-noise amplification unit is connected between the coupling port and the system coupling port, and is configured to perform signal amplification processing on the coupling signal;

An energy conversion unit, the two ends of which are respectively connected to the isolation port and the low-noise amplifier unit, are configured to convert the radio frequency signal of the isolation port into electrical energy to provide electrical energy to the low-noise amplifier unit.
The coupling device according to claim 1, further comprising:

A first-level circulator, including a first port, a second port and a third port;

a secondary circulator, including a first port, a second port and a third port;

Wherein, the first port of the primary circulator is connected to the coupling port, the second port of the primary circulator is connected to the system coupling port, and the third port of the primary circulator is connected to the secondary port. The first port of the circulator is connected, the second port of the secondary circulator and the third port of the secondary circulator are respectively connected to both ends of the low-noise amplifier unit.
The coupling device according to claim 1, the energy conversion unit includes an RF-DC conversion sub-unit and an energy storage sub-unit; wherein both ends of the RF-DC conversion sub-unit are respectively connected to the isolation port and the An energy storage subunit is connected to the low-noise amplifier unit.
The coupling device according to claim 2, when working in the forward direction, the four-port coupler receives a first coupling signal through the input port, and the four-port coupler is configured to process the first coupling signal to obtain a first coupling signal. Two coupling signals, the coupling port is configured to output the second coupling signal to the first-level circulator; the first-level circulator is configured to output the first coupling signal to the system coupling port.
The coupling device according to claim 2, when working in the forward direction, the four-port coupler receives a first through signal through the input port and outputs the first through signal through the output port. .
The coupling device according to claim 2, when working in reverse, the four-port coupler receives a third coupling signal through the system coupling port; the third coupling signal passes through the first-level circulator and the The secondary circulator is output to the low-noise amplifier unit; the low-noise amplifier unit is configured to perform signal amplification processing on the third coupled signal to obtain a fourth coupled signal; the fourth coupled signal passes through the secondary circulator and the first-level circulator are output to the coupling port; the coupling port receives the fourth coupling signal and outputs the four-coupling signal through the input port.
The coupling device according to claim 2, when working in reverse, the four-port coupler receives a second pass-through signal through the output port, and processes the second pass-through signal through the input port. output.
According to the coupling device of claim 3, the RF-DC conversion subunit is configured to convert the acquired radio frequency signal of the isolation port into a DC signal;

The energy storage subunit is configured to store the DC signal and provide DC power to the low-noise amplifier unit.
A signal equalization method, including: using the coupling device according to any one of claims 1 to 8 to perform power equalization processing on the input signal of the indoor distribution system.
A computer-readable storage medium on which a computer program is stored. The computer program implements the method of claim 9 when executed by a processor.
An electronic device including:

processor; and

a memory configured to store executable instructions for said processor;

wherein the processor is configured to perform the method of claim 9 via execution of the executable instructions.
A computer program product includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. It is characterized in that when the computer instructions are executed by a processor, the method of claim 9 is implemented.
An indoor distribution system includes a trunk amplifier, a combiner, a power splitter, an antenna, and a coupling device as claimed in any one of claims 1 to 8.