CN114337879A - Multi-system access platform and communication system - Google Patents
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- CN114337879A CN114337879A CN202111668063.0A CN202111668063A CN114337879A CN 114337879 A CN114337879 A CN 114337879A CN 202111668063 A CN202111668063 A CN 202111668063A CN 114337879 A CN114337879 A CN 114337879A
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Abstract
The application relates to a multi-system access platform and a communication system. The multi-system access platform comprises an intermodulation test unit and a POI radio frequency unit which are sequentially connected, wherein the POI radio frequency unit is used for connecting an antenna feeder system. The intermodulation test unit is used for generating a first carrier signal and a second carrier signal; wherein a signal frequency of the first carrier signal is different from a signal frequency of the second carrier signal; the POI radio frequency unit is used for outputting a first carrier signal and a second carrier signal to the antenna feed system, so that the first carrier signal and the second carrier signal are mutually modulated in the antenna feed system, and an intermodulation signal is generated; the POI radio frequency unit is also used for receiving intermodulation signals; the intermodulation test unit is also used for generating an intermodulation interference test result of the antenna feed system according to the intermodulation signal. Therefore, the multi-system access platform has an intermodulation test function, and the intermodulation performance of the rear-stage antenna feed system is divided by a test room by utilizing the lumped distribution advantage of the multi-system access platform, so that the whole link after connection is completed is monitored.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a multi-system access platform and a communication system.
Background
With the progress of social economy and the rapid development of the communication industry, the requirement of users on the coverage quality of the indoor distribution system is higher and higher. The passive room distribution system has the characteristics of large scale, multiple types and numbers of used devices and complex environment of covered links, and in order to realize high covering quality of the room distribution system, higher requirements on the performance of the devices and connecting pieces need to be provided, and how to monitor the room distribution covering performance of the whole link after connection is completed needs to be considered. Therefore, how to monitor the whole link after the connection is completed becomes a problem which needs to be solved urgently.
Disclosure of Invention
Therefore, a multi-system access platform and a communication system are needed to be provided, the lumped distribution advantage of the multi-system access platform is utilized, the intermodulation performance of the post-stage antenna feed system is divided into a test room, and then the whole link after connection is completed is monitored.
In a first aspect, an embodiment of the present application provides a multi-system access platform, where the multi-system access platform includes an intermodulation test unit and a POI radio frequency unit, which are connected in sequence, and the POI radio frequency unit is used for connecting an antenna feeder system;
the intermodulation test unit is used for generating a first carrier signal and a second carrier signal; wherein a signal frequency of the first carrier signal is different from a signal frequency of the second carrier signal;
the POI radio frequency unit is used for outputting the first carrier signal and the second carrier signal to the antenna feed system, so that the first carrier signal and the second carrier signal are mutually modulated in the antenna feed system and an intermodulation signal is generated;
the POI radio frequency unit is further used for receiving the intermodulation signal;
the intermodulation test unit is further configured to generate an intermodulation interference test result of the antenna feed system according to the intermodulation signal.
In one embodiment, the POI radio frequency unit includes:
the first test signal transceiving module is connected with the intermodulation test unit and is used for connecting the antenna feed system; the first test signal transceiver module is used for outputting the first carrier signal and the second carrier signal to the antenna feed system; and the intermodulation test unit is also used for receiving the intermodulation signals, extracting third-order intermodulation signals from the intermodulation signals and outputting the third-order intermodulation signals to the intermodulation test unit.
In one embodiment, the POI radio frequency unit further includes:
the radio frequency signal transceiving module is used for respectively connecting the antenna feeder system and the base station system; the radio frequency signal transceiver module is used for receiving a downlink communication signal output by the base station system and distributing the downlink communication signal to the antenna feeder system; and the antenna feeder is also used for receiving the uplink communication signal output by the antenna feeder system and outputting the uplink communication signal to the base station system.
In one embodiment, the intermodulation test unit comprises:
the second test signal transceiver module is connected with the POI radio frequency unit and used for generating the first carrier signal and the second carrier signal and receiving an intermodulation signal output by the POI radio frequency unit;
and the signal processing module is connected with the second test signal transceiving module and is used for generating the intermodulation interference test result according to the intermodulation signal.
In one embodiment, the second test signal transceiver module includes:
the carrier signal generating circuit is connected with the POI radio frequency unit and used for generating the first carrier signal and the second carrier signal;
and the intermodulation signal receiving circuit is respectively connected with the POI radio frequency unit and the signal processing module and is used for receiving the intermodulation signal output by the POI radio frequency unit and selectively amplifying the intermodulation signal according to the power of the intermodulation signal.
In one embodiment, the carrier signal generation circuit includes:
a signal source for generating the first carrier signal and the second carrier signal;
and the signal amplification circuit is respectively connected with the information source and the POI radio frequency unit and is used for adjusting the power of the first carrier signal to 43dBm and adjusting the power of the second carrier signal to 43 dBm.
In one embodiment, the signal processing module is configured to perform analog-to-digital conversion on the intermodulation signal to obtain a digital signal, and generate the intermodulation interference test result according to the digital signal.
In one embodiment, the signal processing module is further configured to connect to a monitor terminal, and configured to output the intermodulation interference test result to the monitor terminal.
In a second aspect, an embodiment of the present application provides a communication system, including:
the multi-system access platform is used for distributing downlink communication signals and integrating uplink communication signals;
the antenna feed system is connected with the multi-system access platform and used for receiving downlink communication signals distributed by the multi-system access platform and radiating the downlink communication signals; and the system is also used for receiving the uplink communication signal sent by the communication terminal and outputting the uplink communication signal to the multi-system access platform.
In one embodiment, the communication system further comprises:
and the base station system is connected with the multi-system access platforms and is used for outputting the downlink communication signals to the multi-system access platforms and receiving the uplink communication signals output by the multi-system access platforms.
In the multi-system access platform and the communication system, an intermodulation test unit is arranged in the multi-system access platform, the intermodulation test unit can generate a first carrier signal and a second carrier signal for testing intermodulation interference of an antenna feed system, and the first carrier signal and the second carrier signal are output to the antenna feed system through a POI radio frequency unit in the multi-system access platform, so that the first carrier signal and the second carrier signal are mutually modulated in the antenna feed system, and an intermodulation signal is generated. The intermodulation test unit can also receive the intermodulation signal through the POI radio frequency unit, and accordingly, an intermodulation interference test result of the antenna feed system is obtained. Therefore, the multi-system access platform has an intermodulation test function, and the intermodulation performance of the rear-stage antenna feed system is divided by a test room by utilizing the lumped distribution advantage of the multi-system access platform, so that the whole link after connection is completed is monitored. Meanwhile, the intermodulation test unit and the POI radio frequency unit are two independent units, the two units have independent performance, communication interference on an uplink communication signal and a downlink communication signal in the POI radio frequency unit during intermodulation test can be avoided, meanwhile, the intermodulation test function can be realized by utilizing coverage resources of the POI radio frequency unit, and resource sharing and mutual noninterference are realized between the intermodulation test unit and the POI radio frequency unit.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram of a system architecture of a prior art communication system;
FIG. 2 is a block diagram of a schematic structure of a multi-system access platform according to the present application;
FIG. 3 is a block diagram of a second exemplary architecture of a multi-system access platform of the present application;
FIG. 4 is a third schematic block diagram of a multi-system access platform of the present application;
FIG. 5 is a block diagram of a schematic structure of a multi-system access platform of the present application;
FIG. 6 is a block diagram of a schematic structure of a multi-system access platform of the present application;
fig. 7 is a sixth schematic block diagram of the multi-system access platform of the present application.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
The inventor researches and discovers that the interference covered by the current network indoor subsystem is mainly intermodulation interference. Therefore, if the intermodulation index of the indoor sub-link can be detected at any time by using the equipment, the positioning and the solution of the interference problem are accelerated. A multi-system access platform (Point of Interface, abbreviated as POI) is used as a co-established and shared signal distribution device, and can access all base station signals and receive all antenna feeder signals. Fig. 1 shows a system architecture block diagram of a communication system comprising a multi-system access platform. As shown in fig. 1, signals of all components and units in a coverage project (i.e., a communication system) are transmitted through multiple system access platforms, which are respectively connected to all base stations and all antenna feeder systems in the communication system. In view of the fact that the multi-system access platform can be connected with all components (including the base station and the antenna feed system) in practical application, the multi-system access platform has the advantage of centralized monitoring.
Fig. 2 shows a schematic block diagram of the multi-system access platform 10 in one embodiment, and the multi-system access platform 10 includes an intermodulation test unit 120 and a POI radio frequency unit 110. The intermodulation test unit 120 is connected to the POI radio frequency unit 110, and the POI radio frequency unit 110 is used for connecting with the antenna feeder system 20. The POI rf unit 110 may refer to a device or a circuit that centrally accesses a downlink communication signal output by the information source 132 (e.g., a base station) and introduces the downlink communication signal into the antenna feed system 20, and outputs an uplink communication signal fed back by the antenna feed system 20 to each information source 132. The communication system can implement coverage of mobile communication signals through the lumped distribution function of the POI radio frequency unit 110. It is understood that the specific components of the POI rf unit 110, the specific connection relationship between the components, and the like can be determined according to actual situations, and the present application is not limited thereto. The intermodulation test unit 120 may be a device or a circuit capable of testing intermodulation performance of the antenna feeder system 20, and specific components and specific connection relationships between the components may be determined according to actual situations, which is not particularly limited in this application.
In particular, the intermodulation test unit 120 is used to generate a first carrier signal and a second carrier signal. The signal frequency of the first carrier signal is different from the signal frequency of the second carrier signal, and the first carrier signal and the second carrier signal are used for testing the intermodulation performance of the antenna feed system 20. It is to be understood that the signal frequencies of the first carrier signal and the second carrier signal may be pre-selected, and the present application is not limited thereto specifically, and only the signal frequencies of the two carrier signals need to be different.
In one embodiment, in order to reduce the influence of the intermodulation test on the uplink and downlink communication signals and ensure the communication quality, the signal frequency of the first carrier signal and the signal frequency of the second carrier signal do not fall within the uplink and downlink communication frequency bands supported by the multi-system access platform 10. In other words, if the multi-system access platform 10 supports the communication system a and the communication system B, the signal frequency of the first carrier signal does not fall into the frequency band corresponding to the communication system a nor the frequency band corresponding to the communication system B; similarly, the signal frequency of the second carrier signal does not fall into the frequency band corresponding to the communication system a, nor falls into the frequency band corresponding to the communication system B. Further, in order to reduce the device requirements for the multiple system access platform 10 and reduce the manufacturing difficulty of the multiple system access platform 10, the signal frequency of the first carrier signal may be spaced farther from the uplink and downlink communication frequency bands supported by the multiple system access platform 10, and the signal frequency of the second carrier signal may be spaced farther from the uplink and downlink communication frequency bands supported by the multiple system access platform 10. For example, the frequency difference between the signal frequency of the first carrier signal and the frequency limit (upper limit and/or lower limit) of the aforementioned uplink and downlink communication frequency bands is greater than a certain threshold, and the specific value of the threshold may be determined according to design requirements. The signal frequency of the second carrier signal can be understood in the same way, and is not described in detail here.
The POI radio frequency unit 110 is configured to output the first carrier signal and the second carrier signal to the antenna feed system 20, that is, two carrier signals generated by the intermodulation test unit 120 are transmitted to the antenna feed system 20 via the POI radio frequency unit 110. In this manner, the lumped communication and distribution functions of the POI radio frequency unit 110 may be utilized to distribute the first carrier signal and the second carrier signal to various elements and components of the antenna feed system 20, so that the first carrier signal and the second carrier signal are mutually modulated in the antenna feed feedback system and generate an intermodulation signal. The POI radio frequency unit 110 may also receive the intermodulation signal generated by the antenna feed system 20 and output the intermodulation signal to the intermodulation test unit 120. The intermodulation test unit 120 may obtain intermodulation interference test results for characterizing intermodulation performance status of the antenna feed system 20 based on the intermodulation signals.
In the multi-system access platform 10, the intermodulation test unit 120 is disposed in the multi-system access platform 10, and the intermodulation test unit 120 may generate a first carrier signal and a second carrier signal for testing intermodulation interference of the antenna feed system 20, and output the first carrier signal and the second carrier signal to the antenna feed system 20 through the POI radio frequency unit 110 in the multi-system access platform 10, so that the first carrier signal and the second carrier signal are mutually modulated in the antenna feed system 20, and generate an intermodulation signal. The intermodulation test unit 120 may also receive the intermodulation signal through the POI radio frequency unit 110, and accordingly obtain an intermodulation interference test result of the antenna feeder system 20. Therefore, the multi-system access platform 10 has an intermodulation test function, and the test room divides the intermodulation performance of the rear-stage antenna feed system 20 by using the lumped distribution advantage of the multi-system access platform 10, so as to monitor the whole link after the connection is completed. Meanwhile, the intermodulation test unit 120 and the POI radio frequency unit 110 are two independent units, and the two units have independent performance, so that communication interference on uplink and downlink communication signals in the POI radio frequency unit 110 during intermodulation test can be avoided, meanwhile, an intermodulation test function can be realized by using coverage resources of the POI radio frequency unit 110, and resource sharing is realized between the intermodulation test unit 120 and the POI radio frequency unit 110 without mutual interference.
In one embodiment, as shown in fig. 3, the POI radio frequency unit 110 includes a first test signal transceiver module 112. The first test signal transceiver module 112 refers to a device or a device in the POI radio frequency unit 110 for sending the first carrier signal and the second carrier signal output by the intermodulation test unit 120 to the antenna feeder system 20 and sending the intermodulation signal generated by the antenna feeder system 20 to the intermodulation test unit 120.
Specifically, the first test signal transceiver module 112 is connected to the intermodulation test unit 120 and is used for connecting the antenna feeder system 20. The first test signal transceiver module 112 may receive the first carrier signal and the second carrier signal generated by the intermodulation test unit 120, and output the first carrier signal and the second carrier signal to the antenna feed system 20 by using their own lumped distribution functions, so that the first carrier signal and the second carrier signal are mutually modulated in the antenna feed system 20, and multiple-order intermodulation signals, such as a second-order intermodulation signal, a third-order intermodulation signal, a fourth-order intermodulation signal, etc., are generated.
The inventor researches and finds that, among the intermodulation signals of each order, the third order intermodulation signal has the largest influence on the communication quality, that is, the intermodulation signal with the frequency of (2f1 ± f2) is one of the main reasons influencing the communication quality of the antenna feed system 20. Wherein f1 may be a signal frequency of the first carrier signal, and f2 may be a signal frequency of the second carrier signal; alternatively, f1 may be the signal frequency of the second carrier signal and f1 may be the signal frequency of the first carrier signal.
Therefore, in the present application, the first test signal transceiver module 112, upon receiving the intermodulation signal generated by the antenna feeder system 20, may extract a third order intermodulation signal from the intermodulation signal and output the third order intermodulation signal to the intermodulation test unit 120, so that the intermodulation test unit 120 may generate an intermodulation interference test result of the antenna feeder system 20 according to the third order intermodulation signal. Thus, when the accuracy of the intermodulation interference test result is ensured, the data processing amount of the intermodulation test unit 120 can be reduced, and the monitoring efficiency is accelerated.
It is understood that the first test signal transceiver module 112 may implement the extraction of the third order intermodulation signals by a circuit comprising multiple devices and/or a control circuit. For example, the first test signal transceiver module 112 may include a filter circuit for filtering the received intermodulation signals and outputting third order intermodulation signals. For another example, the first test signal transceiver module 112 may extract and output the third-order intermodulation signals from the intermodulation signals based on a digital signal processing algorithm through one or more controllers.
In one embodiment, as shown in fig. 3, the POI rf unit 110 further includes an rf transceiver module 114, and the rf transceiver module 114 is configured to connect to the antenna feeder system 20 and the base station system 30, respectively. The rf signal transceiver module 114 may refer to an rf circuit capable of implementing a lumped distribution function. Specifically, the radio frequency signal transceiver module 114 may receive a downlink communication signal sent by the base station system 30, and distribute the downlink communication signal to each link of the antenna feed system 20 through its own collective distribution function. The rf signal transceiver module 114 may also receive the uplink communication signals output by each link of the antenna feed system 20, and output the uplink communication signals output by each link to the base station system 30 through its own collective distribution function. Further, the base station system 30 may include a plurality of base stations, and the rf signal transceiver module 114 may output the uplink communication signal to the corresponding base station. In this embodiment, the POI rf unit 110 may implement collective distribution of uplink and downlink communication signals between the communication system and the antenna feed system through the rf signal transceiver module 114 therein, so as to implement an rf coverage function.
In one embodiment, as shown in fig. 4, the intermodulation test unit 120 comprises a second test signal transceiver module 122 and a signal processing module 124. The second test signal transceiver module 122 is a device or circuit having signal generating and receiving functions, and the signal processing module 124 is a device or circuit having signal processing functions. It is understood that the specific component composition and the specific connection relationship of the second test signal transceiver module 122 and the signal processing module 124 can be determined according to practical situations, and the application is not limited thereto.
The second test signal transceiver module 122 is connected to the POI radio frequency unit 110 and the signal processing module 124, respectively. The second test signal transceiver module 122 is configured to generate a first carrier signal and a second carrier signal with different frequencies, and output the first carrier signal and the second carrier signal to the antenna feed system 20 through the POI radio frequency unit 110.
The second test signal transceiver module 122 is further configured to receive an intermodulation signal output by the POI radio frequency unit 110, and generate an intermodulation interference test result of the antenna feeder system according to the intermodulation signal.
In this embodiment, the second test signal transceiver module 122 and the signal processing module 124 which are independent of each other are disposed in the intermodulation test unit 120, so that the influence of signal transceiving on subsequent signal processing can be avoided, and the accuracy of the intermodulation interference test result can be ensured.
In one embodiment, as shown in fig. 5, second test signal transceiver module 122 includes a carrier signal generation circuit 126 and an intermodulation signal reception circuit 128, intermodulation signal reception circuit 128 is connected to signal processing module 124 and POI radio frequency unit 110, respectively, POI radio frequency unit 110 is connected to carrier signal generation circuit 126. The carrier signal generating circuit 126 refers to a device or a circuit capable of generating carrier signals with at least two different frequencies, and the specific implementation thereof may be determined according to actual situations (such as volume requirements, precision requirements, cost requirements, and the like of the multi-system access platform 10), which is not limited in this application. The carrier signal generating circuit 126 is configured to generate a first carrier signal and a second carrier signal, which are output to the antenna feed system 20 through the POI radio frequency unit 110.
The intermodulation signal receiving circuit 128 refers to a device or circuit capable of selectively adjusting signal power, and its specific implementation may be determined according to practical situations (such as amplification factor requirement, amplification power requirement, volume requirement, precision requirement, cost requirement of the multi-system access platform 10, etc.), which is not specifically limited in this application. Specifically, the intermodulation signal receiving circuit 128 may receive the intermodulation signal output by the POI radio frequency unit 110, and selectively amplify the intermodulation signal according to the power of the intermodulation signal, so that the intermodulation signal output by the intermodulation signal receiving circuit 128 may meet the corresponding power requirement, for example, the signal power of the output intermodulation signal may be greater than a power threshold, so that the signal processing module 124 may obtain an accurate intermodulation interference test result according to the intermodulation signal output by the intermodulation signal receiving circuit 128, thereby implementing accurate monitoring.
In other words, if the power of the intermodulation signal output by the POI radio frequency unit 110 meets the preset power requirement, the intermodulation signal receiving circuit 128 may directly output the intermodulation signal output by the POI radio frequency unit 110 to the signal processing module 124. If the power of the intermodulation signal output by the POI radio frequency unit 110 does not meet the preset power requirement, the intermodulation signal receiving circuit 128 may amplify the intermodulation signal output by the POI radio frequency unit 110, and output the amplified intermodulation signal to the signal processing module 124, so that the signal processing module 124 determines the intermodulation interference test result of the antenna feeder system 20 according to the amplified intermodulation signal. Further, the signal processing module 124 may determine the intermodulation interference test result according to the amplification factor and the amplified intermodulation signal.
In one embodiment, as shown in fig. 6, the carrier signal generating circuit 126 further includes a source 132 and a signal amplifying circuit 134, and the source 132, the signal amplifying circuit 134 and the POI radio frequency unit 110 are connected in sequence. Wherein the source 132 is configured to generate a first carrier signal and a second carrier signal. The signal amplifying circuit 134 is configured to adjust the power of the first carrier signal output by the signal source 132 to 43dBm, adjust the power of the second carrier signal output by the signal source 132 to 43dBm, and output the first carrier signal and the second carrier signal of 43dBm to the POI radio frequency unit 110, so as to complete an intermodulation test by the first carrier signal and the second carrier signal of 43 dBm. Therefore, the intermodulation test can be carried out by adopting the first carrier signal and the second carrier signal with the power meeting the intermodulation test regulation, and the accuracy of the test result can be further improved.
In one embodiment, since the intermodulation signal is an analog signal, the signal processing module 124 may be configured to perform analog-to-digital conversion on the intermodulation signal to obtain a digital signal, and generate the intermodulation interference test result of the antenna feed system 20 according to the digital signal. In one embodiment, the signal processing module 124 may determine the peak power and/or peak amplitude of the third order intermodulation signals according to the digital signal, and use this as the intermodulation interference test result of the antenna feed system 20.
In one embodiment, the signal processing module 124 may also be used to connect a monitoring terminal, wherein the monitoring terminal may be a computer device, a mobile phone terminal, or the like. The signal processing module 124 may output the intermodulation interference test result to the monitoring terminal, so that the intermodulation of the antenna feeder system 20 can be visually checked and monitored.
In one embodiment, as shown in fig. 7, a multi-system access platform 10 is provided, specifically including a POI radio frequency unit 110 and an intermodulation test unit 120, where the intermodulation test unit 120 includes a second test signal transceiver module 122 and a signal processing module 124, and the signal processing module 124 may include an intermodulation test signal processing module 136 and a POI monitoring module 138, where the POI monitoring module 138 may be implemented by a software program. In one embodiment, the second test signal transceiver module 122 and the signal processing module 124 may be integrated into one assembly unit to reduce the size and the nodes of the multi-system access platform 10.
The conventional multi-system access platform 10 does not have the intermodulation test function, and the monitoring function generally refers to the self state monitoring, such as standing wave, power reading, self temperature and/or power failure. Different from the existing multi-system access platform 10, the multi-system access platform 10 of the present application has an intermodulation detection function, so that the intermodulation performance of the whole coverage system can be tested by using the lumped distribution advantage of the multi-system access platform 10.
In particular, the POI radio unit 110 is used to provide radio coverage functionality. The intermodulation test unit 120 can implement intermodulation test signal processing and intermodulation test function. Radio frequency communication signals (i.e., uplink and downlink communication signals) may be introduced into the antenna feed system 20 through the base station and the multi-system access platform 10 in sequence. The intermodulation test signals (i.e., the first carrier signal and the second carrier signal) may be output by the second test signal transceiver module 122 and introduced to the antenna feed system 20 via the POI radio frequency unit 110.
The second test signal transceiver module 122 is used for transmitting two 43dBm carrier signals and receiving a third-order intermodulation signal fed back by the antenna feed system 20. The first carrier signal and the second carrier signal transmitted by the second test signal transceiver module 122 are introduced into the antenna feed system 20 through the POI radio frequency unit 110 for triggering third-order intermodulation of the signals of the antenna feed system 20. After being received by the POI rf unit 110, the third-order intermodulation signals fed back by the antenna feeder system 20 are output to the second test signal transceiver module 122 for signal source 132 conversion. The converted signal is sent to the intermodulation test signal processing module 136 for operation processing to obtain third-order intermodulation data. The third-order intermodulation data is transmitted to the POI monitoring module 138, and the POI monitoring module 138 can introduce the third-order intermodulation data to the remote monitoring terminal for interface display through a relevant protocol, so that the intermodulation of the antenna feed system 20 can be visually checked and monitored.
In one embodiment, a communication system is provided, the communication system comprising the multi-system access platform 10 of any of the above embodiments, and an antenna feeder system 20 connected to the multi-system access platform 10. The multiple system access platform 10 is configured to distribute downlink communication signals and aggregate uplink communication signals. The antenna feeder system 20 is configured to receive downlink communication signals distributed by the multi-system access platform 10 and radiate the downlink communication signals; and is further configured to receive an uplink communication signal sent by the communication terminal, and output the uplink communication signal to the multi-system access platform 10. In one example, the system architecture of the antenna feed system 20 may be as shown in fig. 7.
In one embodiment, the communication system further comprises a base station system 30 connected to the multiple system access platform 10, wherein the base station system 30 is configured to output downlink communication signals to the multiple system access platform 10 and receive uplink communication signals output by the multiple system access platform 10. In one example, the base station system 30 may include a plurality of base stations.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A multi-system access platform is characterized by comprising an intermodulation test unit and a POI radio frequency unit which are sequentially connected, wherein the POI radio frequency unit is used for connecting an antenna feeder system;
the intermodulation test unit is used for generating a first carrier signal and a second carrier signal; wherein a signal frequency of the first carrier signal is different from a signal frequency of the second carrier signal;
the POI radio frequency unit is used for outputting the first carrier signal and the second carrier signal to the antenna feed system, so that the first carrier signal and the second carrier signal are mutually modulated in the antenna feed system and an intermodulation signal is generated;
the POI radio frequency unit is further used for receiving the intermodulation signal;
the intermodulation test unit is further configured to generate an intermodulation interference test result of the antenna feed system according to the intermodulation signal.
2. The multi-system access platform of claim 1, wherein the POI radio unit comprises:
the first test signal transceiving module is connected with the intermodulation test unit and is used for connecting the antenna feed system; the first test signal transceiver module is used for outputting the first carrier signal and the second carrier signal to the antenna feed system; and the intermodulation test unit is also used for receiving the intermodulation signals, extracting third-order intermodulation signals from the intermodulation signals and outputting the third-order intermodulation signals to the intermodulation test unit.
3. The multi-system access platform of claim 2, wherein the POI radio unit further comprises:
the radio frequency signal transceiving module is used for respectively connecting the antenna feeder system and the base station system; the radio frequency signal transceiver module is used for receiving a downlink communication signal output by the base station system and distributing the downlink communication signal to the antenna feeder system; and the antenna feeder is also used for receiving the uplink communication signal output by the antenna feeder system and outputting the uplink communication signal to the base station system.
4. The multi-system access platform of claim 1, wherein the intermodulation test unit comprises:
the second test signal transceiver module is connected with the POI radio frequency unit and used for generating the first carrier signal and the second carrier signal and receiving an intermodulation signal output by the POI radio frequency unit;
and the signal processing module is connected with the second test signal transceiving module and is used for generating the intermodulation interference test result according to the intermodulation signal.
5. The multi-system access platform of claim 4, wherein the second test signal transceiver module comprises:
the carrier signal generating circuit is connected with the POI radio frequency unit and used for generating the first carrier signal and the second carrier signal;
and the intermodulation signal receiving circuit is respectively connected with the POI radio frequency unit and the signal processing module and is used for receiving the intermodulation signal output by the POI radio frequency unit and selectively amplifying the intermodulation signal according to the power of the intermodulation signal.
6. The multi-system access platform of claim 5, wherein the carrier signal generation circuitry comprises:
a signal source for generating the first carrier signal and the second carrier signal;
and the signal amplification circuit is respectively connected with the information source and the POI radio frequency unit and is used for adjusting the power of the first carrier signal to 43dBm and adjusting the power of the second carrier signal to 43 dBm.
7. The multi-system access platform according to any one of claims 4 to 6, wherein the signal processing module is configured to perform analog-to-digital conversion on the intermodulation signals to obtain digital signals, and generate the intermodulation interference test result according to the digital signals.
8. The multi-system access platform of claim 7, wherein the signal processing module is further configured to connect a monitor terminal, and configured to output the intermodulation interference test result to the monitor terminal.
9. A communication system, the communication system comprising:
a multi-system access platform according to any one of claims 1 to 8, for distributing downstream communication signals and aggregating upstream communication signals;
the antenna feed system is connected with the multi-system access platform and used for receiving downlink communication signals distributed by the multi-system access platform and radiating the downlink communication signals; and the system is also used for receiving the uplink communication signal sent by the communication terminal and outputting the uplink communication signal to the multi-system access platform.
10. The communication system of claim 9, further comprising:
and the base station system is connected with the multi-system access platforms and is used for outputting the downlink communication signals to the multi-system access platforms and receiving the uplink communication signals output by the multi-system access platforms.
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