CN220754836U

CN220754836U - Positioning signal distribution device and communication system

Info

Publication number: CN220754836U
Application number: CN202322249560.8U
Authority: CN
Inventors: 郑国辉
Original assignee: Shenzhen Gems Navigation Electronics Co ltd
Current assignee: Shenzhen Gems Navigation Electronics Co ltd
Priority date: 2023-08-21
Filing date: 2023-08-21
Publication date: 2024-04-09
Anticipated expiration: 2033-08-21

Abstract

The present utility model relates to the field of signal transmission technologies, and in particular, to a positioning signal distribution device and a communication system. The positioning signal distribution device comprises: the receiving antenna group comprises at least two receiving antennas, and each receiving antenna can receive an original positioning signal; the combiner is connected with the receiving wire set and is used for combining the positioning signals received by the at least two receiving antennas into one path of composite signal; the signal regeneration circuit is connected with the combiner and used for converting the combined signal into a regenerated positioning signal with a specific format; the signal distribution circuit is connected with the signal regeneration circuit and comprises a plurality of signal output ends, wherein the signal distribution circuit is used for dividing the regenerated positioning signal into multiple paths of distribution signals, outputting each path of distribution signal through one signal output end, and each signal output end is used for being connected with one baseband unit. The utility model can ensure that each BBU can work normally.

Description

Positioning signal distribution device and communication system

Technical Field

The present utility model relates to the field of signal transmission technologies, and in particular, to a positioning signal distribution device and a communication system.

Background

With the rapid development of the communication industry, the signal forwarding system is widely applied to the application fields of high-precision technologies such as communication, deep space exploration, national defense and the like. The signal forwarding traditional mode is to connect the BBU (Building Base band Unit, indoor baseband processing unit) to the outdoor antenna for signal transmission. In the base station construction process, a plurality of indoor baseband processing units are usually arranged in a machine room, and the indoor baseband processing units are connected with an outdoor antenna through an antenna distribution device.

However, the signal format that the outdoor antenna can receive is not necessarily the same as the signal format actually required by the indoor baseband processing unit, so that part of the indoor baseband processing unit cannot work normally or the working performance is reduced.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a positioning signal distribution device and a communication system that can ensure that each BBU can operate properly.

The positioning signal distribution device provided by the embodiment of the utility model comprises:

the receiving antenna group comprises at least two receiving antennas, each receiving antenna can receive an original positioning signal, and the original positioning signal comprises at least one of a Beidou satellite signal and a GPS signal;

the combiner is connected with the receiving wire set and is used for combining the positioning signals received by the at least two receiving antennas into one path of composite signal;

the signal regeneration circuit is connected with the combiner and used for converting the combined signal into a regenerated positioning signal in a specific format, and the regenerated positioning signal is any one of a Beidou satellite signal and a GPS signal;

the signal distribution circuit is connected with the signal regeneration circuit and comprises a plurality of signal output ends, wherein the signal distribution circuit is used for dividing the regenerated positioning signals into multiple paths of distribution signals, outputting each path of distribution signals through one signal output end, and each signal output end is used for being connected with one baseband unit.

Optionally, the signal regeneration circuit includes:

the signal demodulation circuit is connected with the combiner and used for demodulating the synthesized signal to obtain navigation data and carrier signals in the synthesized signal;

the data processing circuit is connected with the signal demodulation circuit and used for decoding satellite positions and time in the navigation data to obtain decoded data;

the frequency conversion circuit is connected with the data processing circuit and used for converting the carrier signal into an intermediate frequency signal;

and the signal modulation circuit is connected with the frequency conversion circuit and is used for modulating the intermediate frequency signal and the specific format corresponding to the regenerated positioning signal and outputting the modulated intermediate frequency signal and the specific format.

Optionally, the signal distribution circuit includes a plurality of signal distribution units, each signal distribution unit including a distribution input terminal and at least two distribution output terminals; the plurality of signal distribution units form a multi-level multi-path branching network, wherein:

the distribution input end of the signal distribution unit of the first stage is connected with the signal regeneration circuit;

each distribution output end of the signal distribution unit of the previous stage is correspondingly connected with the distribution input end of the signal distribution unit of the next stage;

the distribution output end of the signal distribution unit of the last stage is used as the signal output end of the signal distribution circuit.

Optionally, each of the signal distribution units includes:

one end of the first capacitor is connected with one end of the second capacitor in series;

one end of a first resistor is connected with one end of a second resistor in series, the other end of the first resistor is connected with the other end of the first capacitor, and the other end of the second resistor is connected with the other end of the second capacitor;

one end of the third capacitor is connected between the first capacitor and the second capacitor, and the other end of the third capacitor is connected between the first resistor and the second resistor;

one end of the third resistor is connected with the other end of the first capacitor, and the other end of the third resistor is connected with the other end of the second capacitor;

the connection point of the third capacitor and the first resistor and the second resistor is used as a distribution input point of the signal distribution unit;

the connection point of the third resistor and the first capacitor is used as one distribution output end of the signal distribution unit, and the connection point of the third resistor and the second capacitor is used as the other output end of the signal distribution unit.

Optionally, the positioning signal distribution device further includes:

and one end of the impedance matching circuit is connected with the signal regeneration circuit, the other end of the impedance matching circuit is connected with the signal distribution circuit, and the impedance matching circuit is a pi-type circuit.

Optionally, the impedance matching circuit includes:

one end of the fourth resistor is connected with the signal regeneration circuit, and the other end of the fourth resistor is connected with the signal distribution circuit;

one end of the fourth capacitor is connected with one end of the fourth resistor, which is connected with the signal regeneration circuit, and the other end of the fourth capacitor is grounded;

and one end of the fifth capacitor is connected with one end of the fourth resistor, which is connected with the signal distribution circuit, and the other end of the fifth capacitor is grounded.

Optionally, the combiner includes:

one end of the sixth capacitor is connected with one end of the seventh capacitor in series;

one end of a fifth resistor is connected with one end of a sixth resistor in series, the other end of the fifth resistor is connected with the other end of the sixth capacitor, and the other end of the sixth resistor is connected with the other end of the seventh capacitor;

an eighth capacitor, one end of which is connected between the sixth capacitor and the seventh capacitor, and the other end of which is connected between the fifth resistor and the sixth resistor;

one end of the seventh resistor is connected with the other end of the sixth capacitor, and the other end of the seventh resistor is connected with the other end of the seventh capacitor;

the connection point of the seventh capacitor and the fifth resistor is used as a combining output end of the combiner;

the connection point of the seventh resistor and the sixth capacitor is used as one combining input end of the combiner and is connected with one receiving antenna, and the connection point of the seventh resistor and the seventh capacitor is used as the other combining input end of the combiner and is connected with the other receiving antenna.

Optionally, the positioning signal distribution device further includes:

a detection alarm circuit comprising:

the main control chip comprises an alarm interface, wherein the alarm interface is used for connecting an intelligent terminal;

the antenna detection circuit is connected with the main control chip at one end and each receiving antenna at the other end, and is used for detecting the antenna working voltage of each receiving antenna; when the working voltage of at least one antenna of the receiving antennas is abnormal, the main control chip outputs an antenna alarm signal through the alarm interface.

One end of the output detection circuit is connected with the main control chip, and the other end of the output detection circuit is connected with each signal output end and is used for detecting the output working voltage of each signal output end; when at least one of the output working voltages of the signal output ends is abnormal, the main control chip outputs an alarm signal through the alarm interface.

Optionally, the antenna detection circuit includes:

a plurality of antenna detection units, each for detecting the antenna operating voltage of one of the receiving antennas;

the antenna detection unit includes:

an eighth resistor, one end of which is connected with one receiving antenna;

one end of the ninth resistor is connected with the other end of the eighth resistor, and the other end of the ninth resistor is grounded;

and a series node of the eighth resistor and the ninth resistor is a detection end of the antenna detection unit and is used for outputting the antenna working voltage.

The communication system provided by the embodiment of the utility model comprises the positioning signal distribution device and a plurality of baseband units, wherein the plurality of baseband units are connected with a plurality of signal output ends of the positioning signal distribution device in one-to-one correspondence.

The embodiment of the utility model has the following beneficial effects:

the receiving antenna group comprises at least two receiving antennas, the combiner combines the positioning signals received by the at least two receiving antennas into one path of combined signal, when one path of receiving antennas fails, the combiner can work normally, outputs satellite signals, ensures normal forwarding of the signals, the signal regeneration circuit converts the combined signal into a regenerated positioning signal with a specific format, the signal distribution circuit divides the regenerated positioning signal into multiple paths of distribution signals and transmits the multiple paths of distribution signals to each BBU, so that the format of the distribution signals received by the BBU meets the operation requirement, and ensures normal work of the BBU.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

FIG. 1 is a schematic diagram of a first embodiment of a positioning signal distribution device according to the present utility model;

fig. 2 is a schematic diagram of a signal regeneration circuit 13 according to an embodiment of the present utility model;

FIG. 3 is a schematic circuit diagram of a portion of a positioning signal distribution device provided by the present utility model;

FIG. 4 is a schematic diagram of an embodiment of a signal distribution circuit according to the present utility model;

fig. 5 is a schematic structural diagram of a plurality of combiner connections provided by the present utility model;

FIG. 6 is a schematic circuit diagram of an embodiment of a detection alarm circuit according to the present utility model;

fig. 7 is a schematic structural diagram of an embodiment of a communication system provided by the present utility model.

The reference numerals in the drawings are as follows:

10. positioning signal distribution means; 11. a receiving antenna group; 111. a receiving antenna; 12. a combiner; 13. a signal reproduction circuit; 131. a signal demodulation circuit; 132. a data processing circuit; 133. a frequency conversion circuit; 134. a signal modulation circuit; 14. a signal distribution circuit 14; 141. a signal distribution unit; 1411. a distribution input; 1412. a distribution output; 142. a signal output terminal; 15. an impedance matching circuit; 16. a detection alarm circuit; 1611. an alarm interface; 1612. an antenna detection unit;

20. a communication system; 21. a baseband unit;

r1, a first resistor; r2, a second resistor; r3, a third resistor; r4, a fourth resistor; r5, a fifth resistor; r6, a sixth resistor; r7, a seventh resistor; r8, eighth resistor; r9, ninth resistor; c1, a first capacitor; c2, a second capacitor; c3, a third capacitor; c4, a fourth capacitor; c5, a fifth capacitor; c6, a sixth capacitor; c7, a seventh capacitor; and C8, an eighth capacitor.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a positioning signal distribution device according to a first embodiment of the present utility model. The positioning signal distribution device 10 includes a receiving antenna group 11, a combiner 12, a signal reproduction circuit 13, and a signal distribution circuit 14, which are connected in this order.

The receiving antenna group 11 includes at least two receiving antennas 111, and each receiving antenna 111 is capable of receiving an original positioning signal including at least one of a Beidou satellite signal and a GPS signal. That is, there may be a portion of the signals received by the receiving antenna 111 being the beidou satellite signals, another portion of the signals received being GPS (Global Positioning System ) signals, or all of the signals received by the receiving antenna 111 being the beidou satellite signals, or all of the signals received by the receiving antenna 111 being the GPS signals.

Each receiving antenna 111 outputs the received original positioning signal to the combiner 12, and the combiner 12 combines the positioning signals received by at least two receiving antennas 111 into one combined signal. The combiner 12 may be an analog circuit combiner that combines multiple signals into one signal output using various analog circuit techniques, such as operational amplifiers, capacitors, inductors, and the like. The combiner 12 may also be a DSP (Digital Signal Processing ) circuit, and combines a plurality of original positioning signals into a single combined signal output through digital filtering, weighting, addition, and other processes. The combiner 12 may also be an RC combiner composed of a resistor and a capacitor, and the output signal of the RC combiner may be a simple superposition of the original positioning signals, or may be a weighted combination by adjusting the values of the resistor and the capacitor. The basic principle of the RC synthesizer is to realize the synthesis and filtering of signals by utilizing the charge-discharge characteristic of a capacitor and the damping characteristic of a resistor. The plurality of signals are connected to the nodes of the capacitor through resistors, and the capacitor mixes the input original positioning signals into a composite signal through a charging and discharging process and outputs the composite signal.

The signal regeneration circuit 13 is connected to the synthesizer 12, and is configured to perform format conversion on the synthesized signal output by the synthesizer 12, and convert the synthesized signal into a regenerated positioning signal with a specific format, where the specific format may be a beidou satellite signal or a GPS signal. The specific format may be selected according to the actual requirements of the user, for example, the user needs to use the GPS signal to perform calculation, and then the GPS signal is used as the specific format. The specific format corresponding to the signal regeneration circuit 13 can be adjusted by adjusting various parameters in the circuit. The signal reproduction circuit 13 uniformly converts the format of the original positioning signal of any format included in the received composite signal into a reproduced positioning signal of a specific format.

Referring to fig. 2 in combination, fig. 2 is a schematic diagram of a signal regeneration circuit 13 according to an embodiment of the utility model. The signal reproduction circuit 13 includes a signal demodulation circuit 131, a data processing circuit 132, a frequency conversion circuit 133, and a signal modulation circuit 134.

The signal demodulation circuit 131 is connected to the combiner 12 for demodulating the composite signal, which is a process of recovering the modulated signal into the original signal, and extracts a baseband signal from the received signal, the baseband signal being a signal representing the original information in the communication system, and generally being a low frequency signal without modulation, including navigation data and carrier signals.

The data processing circuit 132 is connected to the signal demodulation circuit 131, and is configured to decode the satellite position and time in the navigation data, and may include components such as a data decoder, an error correction code decoder, and a data processor, so as to extract and process valid data such as the satellite position and time, and obtain decoded data.

The frequency conversion circuit 133 is connected to the data processing circuit 132, and is configured to convert the frequency of the demodulated and processed signal, and convert the carrier signal into an intermediate frequency signal. Since the GPS signal and the beidou signal may operate at different frequencies, the frequency conversion circuit converts the signal from one frequency to another so as to be compatible with the target device or system.

The signal modulation circuit 134 is connected to the frequency conversion circuit 133, and modulates the intermediate frequency signal after frequency conversion. Modulation is the process of converting a baseband signal into a modulated signal that combines the processed decoded data with an intermediate frequency signal to form a final reproduced positioning signal in a specific format.

The signal distribution circuit 14 is connected to the signal reproduction circuit 13, and includes a plurality of signal output terminals 142 for dividing the reproduction positioning signal into multiple distribution signals, and outputting each distribution signal through one signal output terminal 142, and each signal output terminal 142 is connected to one baseband unit BBU. The signal distribution circuit 14 may be a balanced Splitter (Balanced Splitter), a 3dB Splitter (3 dB Splitter) or an N-way Splitter (N-way Splitter), or may be a multi-way branching network having an input terminal and a plurality of output terminals, so that a reproduced signal can be divided into multi-way distribution signals according to a predetermined rule and distributed to each of the output terminals.

As can be seen from the above description, in this embodiment, the receiving antenna set includes at least two receiving antennas, the combiner combines the positioning signals received by the at least two receiving antennas into one path of composite signal, when one path of receiving antennas fails, the combiner can work normally, outputs satellite signals, ensures normal forwarding of signals, the signal regeneration circuit converts the combined path signal into a regenerated positioning signal in a specific format, the signal distribution circuit divides the regenerated positioning signal into multiple paths of distribution signals and transmits the multiple paths of distribution signals to each BBU, so that the format of the distribution signal received by the BBU meets the operation requirement, and ensures normal work of the BBU.

Referring to fig. 3, fig. 3 is a schematic circuit diagram of a portion of a positioning signal distribution device according to the present utility model. The signal distribution circuit 14 comprises a plurality of signal distribution units 141, each signal distribution unit 141 comprising a distribution input 1411 and at least two distribution outputs 1412; the plurality of signal distribution units 141 are arranged in a multi-stage distribution, and are a multi-stage multi-path branching network. In the multi-path branching network, a distribution input 1411 of a signal distribution unit 141 of a first stage is connected to a signal reproduction circuit 14; each distribution output terminal 1412 of the signal distribution unit 141 of the previous stage is respectively connected to a distribution input terminal 1411 of the signal distribution unit 141 of the next stage; the distribution output 1412 of the signal distribution unit 141 of the last stage serves as the signal output 142 of the signal distribution circuit 14.

The signal distribution units 14 may be provided in three, four, or more, and in the application scenario shown in fig. 3, seven signal distribution units 14 are provided, one signal distribution unit 14 is provided in the first stage, two signal distribution units 14 are provided in the second stage, and four signal distribution units 14 are provided in the third stage. The distribution input 1411 of the signal distribution unit 14 of the first stage is connected to the signal reproduction circuit 14, receives the reproduction positioning signal output from the signal reproduction circuit 14, and the eight distribution outputs 1412 of the four signal distribution units 14 of the third stage serve as the eight signal outputs 142 of the signal distribution circuit 14.

Each of the signal distribution units 131 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a first resistor R1, a second resistor R2, and a third resistor R3. The first capacitor C1 and the second capacitor C2 are connected in series, the first resistor R1 and the second resistor R2 are connected in series, one end of the first resistor R1, which is not connected with the second resistor R2, is connected with one end of the first capacitor C1, which is far away from the second capacitor C2, and one end of the second resistor R2, which is not connected with the first resistor R1, is connected with one end of the second capacitor C2, which is far away from the first capacitor C1; one end of the third capacitor C1 is connected between the first capacitor C1 and the second capacitor C2, and the other end is connected between the first resistor R1 and the second resistor R2.

The connection point A1 of the third capacitor C3 and the first resistor R1 and the second resistor R2 is used as a distribution input point of the signal distribution unit; the connection point B1 of the third resistor R3 and the first capacitor C1 serves as one distribution output 1412 of the signal distribution unit 141, and the connection point B2 of the third resistor R3 and the second capacitor C2 serves as the other distribution output 1412 of the signal distribution unit 141.

In the application scenario shown in fig. 3, each signal distribution unit 141 has two distribution outputs 1412, and in other implementation scenarios, each signal distribution unit 141 may have three or more distribution outputs 1412, and further, the number of distribution outputs 1412 of each signal distribution unit 141 may be equal or unequal. Referring to fig. 4 in combination, fig. 4 is a schematic structural diagram of an embodiment of a signal distribution circuit provided in the present utility model, and in the scenario shown in fig. 4, each signal distribution unit 141 has three distribution output terminals 1412, two levels, and 9 signal output terminals 142.

In the application scenario shown in fig. 3, if the BBU to which the signal distribution circuit 14 needs to be connected is not 2 ⁿ (n is an integer of 1 or more)A method of idling at least one distribution output 1412 of at least a part of the signal distribution unit 141 or a method of not setting at least one distribution output 1412 of at least a part of the signal distribution unit 141 may be selected. For example, when 7 BBUs need to be connected, one allocation output 1412 of one signal allocation unit 141 can be idle.

In the circuit, each element (such as signal source, transmission line, load) has a specific impedance value. When the impedance between two circuits or elements does not match, reflection and loss of the signal may result. With continued reference to fig. 3, the positioning signal distribution apparatus 10 further includes an impedance matching circuit 15, one end of the impedance matching circuit 15 is connected to the signal regeneration circuit 13, the other end is connected to the signal distribution circuit 14, and the impedance matching circuit 15 is a pi-type circuit. The impedance matching circuit 15 is used to achieve impedance matching between the signal distribution circuit 14 and the impedance matching circuit 15 to ensure maximum transmission efficiency and minimum reflection loss of the signal.

Specifically, the impedance matching circuit 15 includes a fourth resistor R4, a fourth capacitor C4, and a fifth capacitor C5. One end of the fourth resistor R4 is connected with the signal regeneration circuit 13, and the other end is connected with the signal distribution circuit 14; one end of the fourth capacitor C4 is connected to one end of the fourth resistor R4 connected with the signal regeneration circuit 13, and the other end is grounded; one end of the fifth capacitor C5 is connected to one end of the fourth resistor R4 connected to the signal distribution circuit 14, and the other end is grounded.

With continued reference to fig. 3, in the scenario illustrated in fig. 3, the combiner 12 includes: a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7,

the sixth capacitor C6 and the seventh capacitor C7 are connected in series, the fifth resistor R5 and the sixth resistor R6 are connected in series, one end of the fifth resistor R5, which is not connected with the sixth resistor R6, is connected with one end of the sixth capacitor C6, which is far away from the seventh capacitor C7, and one end of the sixth resistor R6, which is not connected with the fifth resistor R5, is connected with one end of the seventh capacitor C7, which is far away from the sixth capacitor C6; one end of the eighth capacitor C8 is connected between the sixth capacitor C6 and the seventh capacitor C7, and the other end of the eighth capacitor C8 is connected between the fifth resistor R5 and the sixth resistor R6; one end of the seventh resistor R7 is connected with one end of the sixth capacitor C6 far away from the seventh capacitor C7, and the other end of the seventh resistor R7 is connected with one end of the seventh capacitor C6 far away from the sixth capacitor C6.

The connection point A2 of the seventh capacitor C7 and the fifth resistor R5 and the sixth resistor R6 is used as the combining output end 121 of the combiner 12; the connection point B3 of the seventh resistor R7 and the sixth capacitor C6 is used as one combining input 122 of the combiner 12 and is connected to one receiving antenna 111, and the connection point B4 of the seventh resistor R7 and the seventh capacitor C7 is used as the other combining input 122 of the combiner 12 and is connected to the other receiving antenna 111.

It will be appreciated that in the scenario shown in fig. 3, there is only one combiner 12, and in other implementations, there may be a plurality of combiners 12, as well as a plurality of signal distribution units 141 forming the signal distribution circuit 14, where the plurality of combiners are distributed in multiple stages, which is a multi-stage multi-path branching network. For example, referring to fig. 5, fig. 5 is a schematic structural diagram of a plurality of combiner connections according to the present utility model.

The positioning signal distribution device further comprises a detection alarm circuit 16. Referring to fig. 6, fig. 6 is a schematic circuit diagram of an embodiment of a detection alarm circuit according to the present utility model. The detection alarm circuit 16 includes a main control chip 161, an antenna detection circuit 162 and an output detection circuit (not shown), and the main control chip 161 includes an alarm interface 1611, where the alarm interface 1611 is used to connect with an intelligent terminal. The alert interface 1611 may be an RJ45 interface.

The antenna detection circuit 162 includes a plurality of antenna detection units 1621, and the antenna detection unit 1621 includes an eighth resistor R8 and a ninth resistor R9 arranged in series. The serial connection node of the eighth resistor R8 and the ninth resistor R9 is connected with the main control chip 161, the other end of the eighth resistor R8 is connected with one receiving antenna 111, and the other end of the ninth resistor R9 is grounded. The serial connection node of the eighth resistor R8 and the ninth resistor R9 is a detection end of the antenna detection unit 1621, and is used for outputting the antenna working voltage. The main control chip 161 is connected to the detection ends of all the antenna detection units 1621 to obtain the antenna working voltage of each receiving antenna 111, so as to determine whether each receiving antenna 111 works normally, for example, when the working voltage of the receiving antenna 111 is higher than a preset threshold, it may be determined that the receiving antenna 111 is in a normal working state. When there is an abnormality in the antenna operating voltage of at least one receiving antenna 111, the main control chip 161 outputs an antenna alarm signal through the alarm interface 1611.

One end of the output detection circuit is connected with the main control chip 161, and the other end of the output detection circuit is connected with each signal output end 142 and is used for detecting the output working voltage of each signal output end 142; when there is an abnormality in the output operating voltage of the at least one signal output terminal 142, the main control chip 161 outputs an alarm signal through the alarm interface 1611. The output detection circuit and the antenna detection circuit 162 may have similar structures, and have a plurality of output detection units for respectively detecting the output operation voltage of each signal output terminal 142, which will not be described herein. When there is an abnormality in the output working voltage of the at least one signal output terminal 142, the main control chip 161 outputs an alarm signal through the alarm interface 1611.

The positioning signal device provided by the utility model can be used together with a host machine of a machine room or can be used independently.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a communication system according to an embodiment of the utility model. The communication system 20 comprises the positioning signal distribution device 10 and a plurality of baseband units 21 as described above, and a plurality of the baseband units 21 are connected to a plurality of signal output ends 142 of the positioning signal distribution device in a one-to-one correspondence manner.

The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims

1. A positioning signal distribution device, comprising:

2. The positioning signal distribution device according to claim 1, wherein the signal reproduction circuit includes:

3. The positioning signal distribution device of claim 1 wherein said signal distribution circuit comprises a plurality of signal distribution units, each signal distribution unit comprising a distribution input and at least two distribution outputs; the plurality of signal distribution units form a multi-level multi-path branching network, wherein:

4. A positioning signal distribution device as claimed in claim 3, wherein each of said signal distribution units comprises:

5. The positioning signal distribution device according to claim 1, characterized in that the positioning signal distribution device further comprises:

6. The positioning signal distribution device of claim 5 wherein the impedance matching circuit comprises:

7. The positioning signal distribution device according to claim 1, wherein the combiner comprises:

8. The positioning signal distribution device according to claim 1, characterized in that the positioning signal distribution device further comprises:

a detection alarm circuit comprising:

the antenna detection circuit is connected with the main control chip at one end and each receiving antenna at the other end, and is used for detecting the antenna working voltage of each receiving antenna; when the working voltage of at least one antenna of the receiving antennas is abnormal, the main control chip outputs an antenna alarm signal through the alarm interface;

one end of the output detection circuit is connected with the main control chip, and the other end of the output detection circuit is connected with each signal output end and is used for detecting the output working voltage of each signal output end; when at least one of the output working voltages of the signal output ends is abnormal, the main control chip outputs an output alarm signal through the alarm interface.

9. The positioning signal distribution device according to claim 8, wherein the antenna detection circuit includes:

the antenna detection unit includes:

an eighth resistor, one end of which is connected with one receiving antenna;

10. A communication system comprising a positioning signal distribution device according to any one of claims 1-9 and a plurality of baseband units, a plurality of said baseband units being connected to a plurality of signal outputs of said positioning signal distribution device in a one-to-one correspondence.