CN110120843B - Method and device for detecting signal quality of antenna feeder port - Google Patents
Method and device for detecting signal quality of antenna feeder port Download PDFInfo
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- CN110120843B CN110120843B CN201810112256.XA CN201810112256A CN110120843B CN 110120843 B CN110120843 B CN 110120843B CN 201810112256 A CN201810112256 A CN 201810112256A CN 110120843 B CN110120843 B CN 110120843B
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Abstract
The invention discloses a method and a device for detecting signal quality of an antenna feeder, which relate to the technical field of communication, wherein the method comprises the following steps: the base station sends an original detection signal for detecting the signal quality of the antenna feed port to the large-scale antenna array equipment through the antenna feed port; the base station receives a collected detection signal returned by the large-scale antenna array equipment through collecting the original detection signal; and the base station evaluates the signal quality of the antenna feed port by using the collected detection signals returned by the large-scale antenna array equipment.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a device for detecting signal quality of an antenna feed port.
Background
At present, the fourth generation mobile communication technology is mature and commercial, the fifth generation mobile communication technology is mature gradually, pre-commercial and commercial networks are also laid gradually, the MIMO (Multiple-Input Multiple-Output) and passive-MIMO technologies have become important marks and core technologies of wireless base station equipment, the wireless base station equipment is mainly divided into two applications in the field, one is an external Multiple antenna array and the other is antenna integrated equipment, a large-scale antenna array and an active circuit are combined into a whole for use, no matter which application scenario is adopted, the performance of an antenna feed port can only be measured when the wireless base station equipment leaves the factory, the performance of the antenna equipment is ensured by an antenna manufacturer, and no matter whether the wireless base station equipment leaves the factory or is installed in the field engineering, if problems occur in the butt joint of the antenna feed port of the base station equipment and the antenna, such as passive intermodulation deterioration, the signal-to-noise ratio after the butt joint is deteriorated sharply, the outfield coverage performance of the base station equipment is seriously affected, so that if the outfield fails, the problems of excessive number of investigation channels and delayed response exist, extra expense is also added, and the maintenance cost is greatly increased.
Disclosure of Invention
The technical problem that when an external field fails, the number of the checking channels is too large, and the service is affected or interrupted for a long time is solved according to the scheme provided by the embodiment of the invention.
The method for detecting the signal quality of the antenna feeder port provided by the embodiment of the invention comprises the following steps:
the base station sends an original detection signal for detecting the signal quality of the antenna feed port to the large-scale antenna array equipment through the antenna feed port;
the base station receives a collected detection signal returned by the large-scale antenna array equipment through collecting the original detection signal;
and the base station evaluates the signal quality of the antenna feed port by using the collected detection signals returned by the large-scale antenna array equipment.
The device for detecting the signal quality of the antenna feed port provided by the embodiment of the invention comprises the following components:
the sending module is used for sending an original detection signal for detecting the signal quality of the antenna feed port to the large-scale antenna array equipment through the antenna feed port;
a receiving module, configured to receive a collected detection signal returned by the large-scale antenna array device by collecting the original detection signal;
and the evaluation module is used for evaluating the signal quality of the antenna feed port by utilizing the collected detection signals returned by the large-scale antenna array equipment.
According to the embodiment of the invention, the equipment for detecting the signal quality of the antenna feeder comprises: a processor, and a memory coupled to the processor; the memory stores a program for detecting the signal quality of the antenna feeder, which can run on the processor, and the program for detecting the signal quality of the antenna feeder is executed by the processor according to the method for detecting the signal quality of the antenna feeder provided by the embodiment of the disclosure.
According to the computer storage medium provided by the embodiment of the invention, a program for detecting the signal quality of the antenna feeder is stored, and the program for detecting the signal quality of the antenna feeder is executed by a processor to perform the method for detecting the signal quality of the antenna feeder provided by the embodiment of the disclosure.
According to the scheme provided by the embodiment of the invention, the installation problem of large-scale antenna array equipment and the problems of a large number of channels and response delay do not need to be checked by personnel on site, the problem of poor connection of the antenna feeder caused by factors such as engineering installation of the wireless base station of the external field can be efficiently and quickly remotely positioned by detecting the relevant indexes of the signal of the antenna feeder, and the influence or interruption of the service for a long time is avoided, so that the maintenance efficiency of the external field is improved, and the maintenance cost is reduced.
Drawings
Fig. 1 is a flowchart of a method for detecting signal quality of an antenna feeder according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an apparatus for detecting signal quality of an antenna feed according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a network for detecting signal quality of an antenna feeder of a wireless base station device according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for detecting signal quality of an antenna feeder according to an embodiment of the present invention;
fig. 5 is a flowchart for determining connection quality of an antenna feeder by detecting an EVM according to an embodiment of the present invention;
fig. 6 is a flowchart for determining the quality of an antenna feeder connection by detecting the passive intermodulation level according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described below are only for the purpose of illustrating and explaining the present invention, and are not to be construed as limiting the present invention.
Fig. 1 is a flowchart of a method for detecting signal quality of an antenna feeder according to an embodiment of the present invention, as shown in fig. 1, including:
step S101: the base station sends an original detection signal for detecting the signal quality of the antenna feed port to the large-scale antenna array equipment through the antenna feed port;
step S102: the base station receives a collected detection signal returned by the large-scale antenna array equipment through collecting the original detection signal;
step S103: and the base station evaluates the signal quality of the antenna feed port by using the collected detection signals returned by the large-scale antenna array equipment.
Wherein, the base station sends the original detection signal for detecting the signal quality of the antenna feed port to the large-scale antenna array equipment through the antenna feed port, and the base station comprises: the base station sends original detection signals containing N original IQ data to large-scale antenna array equipment through an antenna feed port; or the base station sends the original detection signal containing the pair of the double-voice-frequency spectrum data to the large-scale antenna array equipment through the antenna feeder; wherein N is a positive integer.
Wherein, the base station utilizes the collected detection signal returned by the large-scale antenna array equipment to evaluate the signal quality of the antenna feed port, and the evaluation comprises the following steps: the base station sequentially determines the error vector amplitude of each acquired IQ data by using the acquired detection signals containing N acquired IQ data and the original detection signals containing N original IQ data returned by the large-scale antenna array equipment; the base station obtains the error vector amplitude of the antenna feeder by using the determined error vector amplitude of each acquired IQ data, and compares the obtained error vector amplitude with a preset error vector amplitude; and if the obtained error vector amplitude exceeds the preset error vector amplitude, the base station determines that the signal quality of the antenna feeder has a problem.
Wherein, the base station utilizes the collected detection signal returned by the large-scale antenna array equipment to evaluate the signal quality of the antenna feed port, and the evaluation comprises the following steps: the base station calculates two third-order intermodulation used for representing the passive intermodulation level of the antenna feeder by utilizing a collected detection signal which is returned by the large-scale antenna array equipment and contains dual-tone frequency spectrum power and passive intermodulation component power; the base station compares the larger third-order intermodulation of the two third-order intermodulation with preset third-order intermodulation; and if the larger third-order intermodulation exceeds the preset third-order intermodulation, the base station determines that the signal quality of the antenna feeder has a problem.
Fig. 2 is a schematic diagram of an apparatus for detecting signal quality of an antenna feed according to an embodiment of the present invention, as shown in fig. 2, including: a sending module 201, configured to send an original detection signal for detecting the signal quality of the antenna feed port to a large-scale antenna array device through the antenna feed port; a receiving module 202, configured to receive a collected detection signal returned by the large-scale antenna array device by collecting the original detection signal; and the evaluation module 203 is configured to evaluate the quality of the antenna feed signal by using the collected detection signal returned by the large-scale antenna array device.
Wherein, the sending module 201 includes: a first sending unit, configured to send an original detection signal containing N original IQ data to a large-scale antenna array device through an antenna feed port; or the second sending unit is used for sending the original detection signal containing the pair of the double-tone frequency spectrum data to the large-scale antenna array equipment through the antenna feed port; wherein N is a positive integer.
Wherein the evaluation module 203 comprises: the first calculation unit is used for sequentially determining the error vector amplitude of each acquired IQ data by utilizing the acquired detection signals containing N acquired IQ data and the original detection signals containing N original IQ data returned by the large-scale antenna array equipment; the first comparison unit is used for obtaining the error vector amplitude of the antenna feeder by using the determined error vector amplitude of each acquired IQ data and comparing the obtained error vector amplitude with a preset error vector amplitude; and the first evaluation unit is used for determining that the signal quality of the antenna feeder has a problem if the obtained error vector amplitude exceeds a preset error vector amplitude.
Wherein the evaluation module 203 comprises: the second calculation unit is used for determining two third-order intermodulation used for representing the passive intermodulation level of the antenna feed port by utilizing the collected detection signals containing the dual-tone frequency spectrum power and the passive intermodulation component power returned by the large-scale antenna array equipment; a second comparing unit, configured to compare a larger third-order intermodulation of the two third-order intermodulation with a preset third-order intermodulation; and the second evaluation unit is used for determining that the signal quality of the antenna feeder has a problem when the larger third-order intermodulation exceeds the preset third-order intermodulation.
The embodiment of the invention provides equipment for detecting signal quality of an antenna feeder, which comprises: a processor, and a memory coupled to the processor; the memory stores a program for detecting antenna feed signal quality, which is executable on the processor, and when executed by the processor, the program for detecting antenna feed signal quality includes:
sending an original detection signal for detecting the signal quality of the antenna feed port to large-scale antenna array equipment through the antenna feed port;
receiving a collected detection signal returned by the large-scale antenna array equipment through collecting the original detection signal;
and evaluating the signal quality of the antenna feed port by using the collected detection signals returned by the large-scale antenna array equipment.
The computer storage medium provided by the embodiment of the invention stores a program for detecting the signal quality of the antenna feeder, and the program for detecting the signal quality of the antenna feeder is realized by comprising the following steps when executed by a processor:
sending an original detection signal for detecting the signal quality of the antenna feed port to large-scale antenna array equipment through the antenna feed port;
receiving a collected detection signal returned by the large-scale antenna array equipment through collecting the original detection signal;
and evaluating the signal quality of the antenna feed port by using the collected detection signals returned by the large-scale antenna array equipment.
Fig. 3 is a schematic diagram of a network for detecting signal quality of an antenna feeder of a wireless base station device according to an embodiment of the present invention, as shown in fig. 3, including: a base station and a large-scale antenna array device. Specifically, the entire detection network includes: the system comprises a baseband data source, a transmitting channel, a correction coupling network of a large-scale antenna array, a detection interface of a wireless base station, a detection circuit and a digital signal processing module, wherein:
the base band data source is used for sending specific detection data and sending the specific detection data through N channels of the wireless base station;
the correction coupling network is a passive coupling circuit of the existing network large-scale antenna array, and outputs signals through an antenna feed port of each channel of the wireless base station and returns the signals to the base station for processing in a combining way;
the detection interface of the wireless base station is in butt joint with the output of the passive coupling circuit of the large-scale antenna array, and the returned signal is input to the detection circuit of the base station;
the detection circuit of the wireless base station receives the signals output by the large-scale antenna array passive coupling circuit, processes such as analog amplification, filtering, analog-to-digital conversion and the like to convert the signals into digital signals, and then transmits the digital signals to the digital signal processing module of the base station;
the digital signal processing module receives a downlink signal from the wireless base station detection circuit, processes the digital signal, and compares the detection signal with data sent by a baseband data source by adopting a specific algorithm so as to judge the quality of an antenna feeder signal;
optionally, the detection interface and the detection circuit may multiplex an existing calibration interface and a calibration channel on the wireless base station, or design a detection interface and a detection channel separately on a newly developed base station device;
optionally, the whole network only detects in the working slot, and normal service is not affected.
Optionally, the detection network may determine the connection quality of the antenna feeder by detecting an EVM (Error Vector Magnitude), where the detection algorithm is as follows:
the baseband data source (original IQ data) is N data, namely data1, data2 and … … data N;
the N baseband data are divided into I, Q parts, which are: data1 ═ I1+jQ1、data2＝I2+jQ2、……dataN＝IN+jQN；
The IQ data collected and detected by the antenna feeder and the detection network are respectively as follows: data1 ═ I1’+jQ1’、data2’＝I2’+jQ2’、……dataN’＝IN’+jQN’；
The digital signal processing module calculates the EVM of the antenna feed port by using the detected acquired IQ data and data of the baseband data source, and specifically includes:
the base station calculates an error vector of each acquired IQ data and baseband data source:
the base station calculates the EVM of each acquired IQ data:
the base station obtains the EVM of the antenna feeder by using the determined error vector magnitude of each acquired IQ data:
and if the EVM value exceeds the requirements of delivery indexes (the delivery indexes comprise precision, intermodulation level and the like), judging that the signal quality of the antenna feeder port has problems, and reporting an alarm.
Preferably, the detection network may determine the connection quality of the antenna feeder by detecting a passive Intermodulation level IMD3(3rd Order Intermodulation) of the antenna feeder, where the detection algorithm is as follows:
the baseband data source is a pair of appropriately spaced diphones f in the frequency domain1、f2The diphone interval is: f ═ f2-f1(if f)2>f1) (ii) a Equation 4
The signal detected by the antenna feeder and the detection network is subjected to frequency spectrum shifting and digital filtering to detect the diphone f1、f2Respectively is P1、P2(in dBm);
and comparing the frequency spectrum of the detection signal with the frequency spectrum of a baseband data source, wherein the frequency spectrums of the passive intermodulation products are respectively as follows: f. ofIMD3_1＝f1-Δf，fIMD3_2＝f2+ Δ f; equation 5
Detecting to obtain passive intermodulation component f through frequency spectrum shifting and digital filteringIMD3_1And fIMD3_2Power is respectively PIMD3_1、PIMD3_2(in dBm);
the passive intermodulation level is characterized by IMD3, with the formula:
IMD3_1＝P1-PIMD3_1，IMD3_2＝P2-PIMD3_2(IMD3_1 and IMD3_2 are in dB); equation 6
When the passive intermodulation level IMD3 (the larger value of IMD3_1 and IMD3_ 2) exceeds the system allowable level (the system index comprises in-band blocking, out-of-band blocking and the like), an alarm is reported.
Fig. 4 is a flowchart of a method for detecting signal quality of an antenna feeder according to an embodiment of the present invention, as shown in fig. 4, including:
step 401: in the public time slot, a baseband data source of the base station sends specific detection data to a channel 1;
step 402: the baseband data is amplified by the transmitting channel 1, collected by the correction coupling network after passing through the antenna feed port, and transmitted back to the detection circuit of the base station through the correction interface or the special detection interface;
step 403: the detection circuit of the base station converts the detected signal into a digital signal without distortion and transmits the digital signal to the digital signal processing module;
step 404: the digital signal processing module compares the detected data with the data of the baseband data source through a specific algorithm, and calculates the related index capable of representing the signal quality;
step 405: polling the N channels;
step 406: and judging whether the detection result meets the system index requirement, and if not, reporting an alarm.
Fig. 5 is a flowchart for determining connection quality of an antenna feeder by detecting an EVM according to an embodiment of the present invention, as shown in fig. 5, including:
step 501: in a public time slot, a base band data source of a base station sends N IQ data to a channel 1;
step 502: the baseband IQ data is amplified by a transmitting channel 1, collected by a correction coupling network after passing through an antenna feed port, and transmitted back to a detection circuit of a base station through a correction interface or a special detection interface;
step 503: the detection circuit of the base station converts the detected signal into a digital signal without distortion and transmits the digital signal to the digital signal processing module;
step 504: the digital signal processing module calculates the detected N IQ data and N original IQ data of a baseband by a formula 1 to obtain N error vectors, and then obtains the error vector amplitude of each IQ data by a formula 2, so as to obtain a final EVM value by calculation;
step 505: polling the N channels;
step 506: and judging whether the EVM value meets the system index requirement, and if not, reporting an alarm.
Fig. 6 is a flowchart for determining the connection quality of an antenna feeder by detecting the passive intermodulation level according to an embodiment of the present invention, as shown in fig. 6, including:
step 601: in a common time slot, a base band data source of a base station transmits a pair of diphones f1、f2Feeding channel 1;
step 602: double tone f1、f2The signal is amplified by a transmitting channel 1, collected by a correction coupling network after passing through an antenna feeder port, and transmitted back to a detection circuit of the base station through a correction interface or a special detection interface;
step 603: the detection circuit of the base station converts the detected signal into a digital signal without distortion and transmits the digital signal to the digital signal processing module;
step 604: the digital signal processing module respectively obtains the diphone f by carrying out frequency spectrum shift and digital filtering on the signals detected by the antenna feed port and the detection network according to formulas 4 and 51、f2Power level and passive intermodulation products fIMD3_1And fIMD3_2The power of the passive intermodulation amplifier is calculated according to the formula 6 to obtain the value of the IMD3 representing the passive intermodulation level;
step 605: polling the N channels;
step 606: and judging whether the IMD3 meets the system index requirements, and if not, reporting an alarm.
The embodiment of the invention furthest utilizes the hardware condition of the existing wireless base station equipment to detect the EVM and the passive intermodulation level IMD3 at the interconnection interface-antenna feeder of the wireless base station and the large-scale antenna array equipment, thereby judging the quality of the connection quality of the antenna feeder, and utilizes the public time slot without influencing any normal service.
According to the scheme provided by the embodiment of the invention, the hardware condition of the existing external field wireless base station equipment can be fully utilized, and the quality of interconnection between the wireless base station and the large-scale antenna array can be detected by detecting the relevant indexes of the antenna feeder signals, so that the one-time success rate of external field engineering installation is greatly improved, the signal quality at the interconnection interface between the wireless base station and the large-scale antenna array can be monitored for a long time, and the fault problem caused by the interconnection of the external field wireless base station and the large-scale antenna array can be efficiently and quickly positioned.
Although the present invention has been described in detail hereinabove, the present invention is not limited thereto, and various modifications can be made by those skilled in the art in light of the principle of the present invention. Thus, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the present invention.
Claims (8)
1. A method for detecting antenna feed port signal quality, comprising:
the base station sends an original detection signal for detecting the signal quality of the antenna feed port to the large-scale antenna array equipment through the antenna feed port, wherein the original detection signal is an original detection signal containing a pair of double-tone frequency spectrum data;
the base station receives and utilizes the large-scale antenna array equipment to return an acquired detection signal containing a double-tone spectrum power and a passive intermodulation component power by acquiring the original detection signal, and determines two third-order intermodulation used for representing the passive intermodulation level of the antenna feed;
and the base station compares the larger third-order intermodulation of the two third-order intermodulation with the preset third-order intermodulation, and determines that the signal quality of the antenna feeder has a problem when the larger third-order intermodulation exceeds the preset third-order intermodulation.
2. The method of claim 1, wherein the base station sending a raw detection signal for detecting the signal quality of the antenna feed to a large-scale antenna array device via the antenna feed comprises:
the base station sends original detection signals containing N original IQ data to large-scale antenna array equipment through an antenna feed port; or
The base station sends an original detection signal containing a pair of double-tone frequency spectrum data to the large-scale antenna array equipment through an antenna feed port;
wherein N is a positive integer.
3. The method of claim 2, wherein the base station uses the collected detection signals returned by the massive antenna array equipment to evaluate the quality of the antenna feeder signals, and comprises:
the base station sequentially determines the error vector amplitude of each acquired IQ data by using the acquired detection signals containing N acquired IQ data and the original detection signals containing N original IQ data returned by the large-scale antenna array equipment;
the base station obtains the error vector amplitude of the antenna feeder by using the determined error vector amplitude of each acquired IQ data, and compares the obtained error vector amplitude with a preset error vector amplitude;
and if the obtained error vector amplitude exceeds the preset error vector amplitude, the base station determines that the signal quality of the antenna feeder has a problem.
4. An apparatus for detecting antenna feed signal quality, comprising:
a sending module, configured to send an original detection signal for detecting signal quality of the antenna feed port to a large-scale antenna array device through the antenna feed port, where the original detection signal is an original detection signal including a pair of monaural frequency spectrum data;
a receiving module for receiving and utilizing the large-scale antenna array device to return a collected detection signal containing a dual tone spectrum power and a passive intermodulation component power by collecting the original detection signal, and determining two third-order intermodulation for characterizing the antenna feed passive intermodulation level;
and the evaluation module is used for comparing the larger third-order intermodulation of the two third-order intermodulation with the preset third-order intermodulation and determining that the signal quality of the antenna feed port has a problem when the larger third-order intermodulation exceeds the preset third-order intermodulation.
5. The apparatus of claim 4, wherein the sending module comprises:
a first sending unit, configured to send an original detection signal containing N original IQ data to a large-scale antenna array device through an antenna feed port; or
The second sending unit is used for sending the original detection signal containing the pair of the double-tone frequency spectrum data to the large-scale antenna array equipment through the antenna feed port;
wherein N is a positive integer.
6. The apparatus of claim 5, wherein the evaluation module comprises:
the first calculation unit is used for sequentially determining the error vector amplitude of each acquired IQ data by utilizing the acquired detection signals containing N acquired IQ data and the original detection signals containing N original IQ data returned by the large-scale antenna array equipment;
the first comparison unit is used for obtaining the error vector amplitude of the antenna feeder by using the determined error vector amplitude of each acquired IQ data and comparing the obtained error vector amplitude with a preset error vector amplitude;
and the first evaluation unit is used for determining that the signal quality of the antenna feeder has a problem if the obtained error vector amplitude exceeds a preset error vector amplitude.
7. An apparatus for detecting antenna feed port signal quality, the apparatus comprising: a processor, and a memory coupled to the processor; the memory stores a program for detecting quality of an antenna feeder signal, which is executable on the processor, and when the program for detecting quality of an antenna feeder signal is executed by the processor, the steps of the method for detecting quality of an antenna feeder signal according to any one of claims 1 to 3 are implemented.
8. A computer storage medium, characterized in that a program for detecting the quality of an antenna feeder signal is stored, which when executed by a processor implements the steps of the method for detecting the quality of an antenna feeder signal according to any one of claims 1 to 3.
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| CN102301530A (en) * | 2008-12-29 | 2011-12-28 | 麦德托尼克公司 | Phased array cofire antenna structure and method for forming the same |
| CN103379532A (en) * | 2012-04-12 | 2013-10-30 | 华为技术有限公司 | Method and apparatus for testing signal quality of radio frequency unit of base station |
| CN106164685A (en) * | 2014-04-08 | 2016-11-23 | 亚德诺半导体集团 | Determine active antenna system and the method for intermodulation distortion performance |
| CN107566052A (en) * | 2016-06-30 | 2018-01-09 | 是德科技股份有限公司 | For characterizing the compact system of the Devices to test with integrated antenna array |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102301530A (en) * | 2008-12-29 | 2011-12-28 | 麦德托尼克公司 | Phased array cofire antenna structure and method for forming the same |
| CN103379532A (en) * | 2012-04-12 | 2013-10-30 | 华为技术有限公司 | Method and apparatus for testing signal quality of radio frequency unit of base station |
| CN106164685A (en) * | 2014-04-08 | 2016-11-23 | 亚德诺半导体集团 | Determine active antenna system and the method for intermodulation distortion performance |
| CN107566052A (en) * | 2016-06-30 | 2018-01-09 | 是德科技股份有限公司 | For characterizing the compact system of the Devices to test with integrated antenna array |
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