CN100455089C - An apparatus and method for implementing base station antenna standing-wave ratio alarm - Google Patents
An apparatus and method for implementing base station antenna standing-wave ratio alarm Download PDFInfo
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- CN100455089C CN100455089C CNB2003101176065A CN200310117606A CN100455089C CN 100455089 C CN100455089 C CN 100455089C CN B2003101176065 A CNB2003101176065 A CN B2003101176065A CN 200310117606 A CN200310117606 A CN 200310117606A CN 100455089 C CN100455089 C CN 100455089C
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Abstract
The present invention discloses a realizing device and a method of the standing-wave ratio warning of base station antennae. In the present invention, inverse power detection is carried out by carrying out antenna opening standing-wave ratio calibration; a digital signal processing module (12) samples inverse power detection signals and processes sampled digitized information; the digital signal processing module (12) outputs standing-wave ratio warning signal steps; the standing wave ratio warning function of antennae can be realized only by detecting the magnitude of reverse signal power through DSP processing; thereby, the present invention overcomes the problems of false warning of the standing wave ratio warning circuits of antennae and high warning dismissal probability and nicely satisfies the requirement of high maintainability of wireless communication service operators to base station devices.
Description
Technical field
The invention belongs to moving communicating field, particularly have the Wireless Telecom Equipments such as PHS base station of antenna standing wave ratio alarm function.
Background technology
Continuous development along with present mobile communication technology, wireless traffic operator requires more and more higher to the maintainability of wireless network, no matter wireless device, or base station equipment, can both in time detect antenna standing wave ratio excessive (usually because bad the causing of physical connection that a variety of causes causes) and alarm, and require very low mistake alarm and leak the alarm probability.The standing-wave ratio alarm circuit of backward power detection technique is realized the antenna standing wave ratio alarm function of wireless transmitting device before the main in the industry at present employing based on the comparison, claims that hereinafter this kind method is traditional standing-wave ratio alarm circuit.
The principle of tradition standing-wave ratio alarm circuit is to use coupler sampling transmitting power and reflection power at the forward power amplifier delivery outlet of base station or antenna opening place, re-use the d. c. voltage signal that the power detection device is converted to them reflection power power respectively, the general processing and amplifying that also will pass through the once-through operation amplifier respectively, send into voltage comparator at last and compare, be used for representing alarm status to form or high or low output level.The degree of coupling of carrying out the directional coupler of backward power sampling here will be according to the standing-wave ratio size decision that is detected than the measures of dispersion of the forward power sampling coupler degree of coupling, and the directivity of this coupler must be better than the return loss of the target standing-wave ratio correspondence that will detect, and could guarantee the accuracy that detects like this.Such as, it is alarm in 3 o'clock that the base station requires in the antenna opening standing-wave ratio, the directivity of backward power sampling coupler then must be better than 6dB (return losses of standing-wave ratio 3 correspondences) so, could disregard the real size that reflects backward power under the condition of other influences, thereby detect the standing-wave ratio situation of antenna opening exactly.This antenna opening standing-wave ratio detects warning circuit and has mistake police, alarm dismissal probability problem of higher.Because in actual applications, the antenna feeder length meeting variation to some extent because of the restriction of design and actual installation condition etc. that connects the radio frequency connecting line of power amplifier and base station equipment antenna opening and be connected base station equipment antenna opening and antenna that is to say that the phase place of reverse signal also will change with respect to the reverse signal sampling point thereupon.The pcb board material characteristic that radio circuit uses, all there is deviation in the course of processing, connector also can't be accomplished desirable coupling fully, can there be the impedance non-continuous event, reflected signal and become pip, and the signal that these reflected signals can reflect with real load place and since the forward signal energy that the limited leakage of sampling coupler directivity is come in sample of signal point place mutual superposition, therefore detected reverse signal can only be the stack intensity of a plurality of signals in the side circuit, and can not judge the reflected signal strength from load of real reflection antenna opening standing-wave ratio size accurately.The additive process of radiofrequency signal is a vector superposed process, and is closely related with the phase place that each component reflected signal of each pip (just from) that participates in stack arrives summing point (sample of signal point).Under the certain condition of terminating load standing-wave ratio, the phase condition the when variation of this radio frequency (RF) cable length can make the signal stack changes, and makes the synthetic effect of signal stack, and promptly final detected reverse signal energy changes.In traditional standing-wave ratio alarm circuit, this stack power is that the reflected energy that is taken as the antenna opening load is treated, be that the reflected signal sampling point is a reference point with the detection position so, look to antenna direction, this stack power with the variation of phase place just can equivalence be the standing-wave ratio of back terminating load with phase change, this period of change is 360 ° usually.Test point back pip is many more, and the reflection coefficient of pip is big more, and the amplitude of variation of equivalent standing-wave ratio is just big more.When this amplitude of variation surmounted alarming threshold greatly, the alert and false dismissal of mistake will appear.It is this because the equivalent standing-wave ratio that conditions such as external cable are brought changes alert, the higher reason place of alarm dismissal probability of traditional just standing-wave ratio alarm circuit mistake.
Summary of the invention
The implement device and the method that the purpose of this invention is to provide a kind of antenna for base station standing-wave ratio alarm, overcome alert, the alarm dismissal probability problem of higher of existing antenna standing wave ratio warning circuit mistake, reduce the associated maintenance cost of base station equipment, satisfy radio communication service operator well the maintainable high demand of base station equipment.
For achieving the above object, the invention provides a kind of implement device of antenna for base station standing-wave ratio alarm, this device is made up of two circuit modules: backward power detects processing module, digital signal processing module.
Described backward power detects processing module and further comprises directional coupler, fixed attenuator, wave detector, low-pass filter circuit, operational amplification circuit.
Described digital signal processing module further comprises A/D converter, electrically-erasable memory, DSP unit.
Described backward power detects the reflected signal strength that processing module mainly is responsible for directly reflecting by described directional coupler sampling antenna opening standing-wave ratio situation.Described fixed attenuator then is used for sampled signal intensity is done further adjustment, makes it fall into the optimum detection scope of used detection device.The reflected signal that described wave detector then is used for taking a sample out is transformed into the d. c. voltage signal relevant with its intensity.Described low-pass filter circuit is used to effectively reduce the amplitude of ripple.Filtered signal is sent into described operational amplification circuit and (is carried out processing and amplifying, with the amplitude of adjustment detectable voltage signals and the relation curve slope characteristics of tested backward power and voltage.The output that described backward power detects processing module is converted to digital signal by the A/D converter in the digital signal processing module, links to each other respectively with described DSP unit with described electrically-erasable memory by number bus.Described electrically-erasable memory is used for storage calibration data when the antenna opening standing-wave ratio is calibrated, described DSP unit then is used for handling the detection voltage data that described A/D converter is sent here in real time in the actual operation of equipment, and with described electrically-erasable memory in normal data contrast, need to judge whether alarm.
For achieving the above object, the invention allows for a kind of implementation method of antenna for base station standing-wave ratio alarm, may further comprise the steps:
In specifically describing below, do not alarm when design object antenna opening standing-wave ratio is x, standing-wave ratio is alarmed during for y.
Step 1: antenna opening standing-wave ratio calibration;
Step 2: backward power detects;
Step 3: digital signal processing module is taken a sample to the backward power detection signal;
Step 4: digital signal processing module is handled the digital information that is sampled to;
Step 5: digital signal processing module output standing-wave ratio alarm signal.
Described step 1 may further comprise the steps:
(1) power amplifier output power of base station equipment is adjusted to rated output power, turn-off input signal.
(2) standing-wave ratio be the mismatch load of x can be continuously by one or the covert position device that changes at least 360 ° of phase places that jumps link to each other with the antenna for base station mouth, the other end of phase varying device is connected on the delivery outlet of power amplifier.Open power amplifier output, in 360 ° of scopes, change signal phase continuously or jumpily, read the maximum, the minimum value that detect voltage with the backward power of phase change, and under software control, write in the electrically-erasable memory by covert position device.
(3) be that the mismatch load of x changes the load that standing-wave ratio is y into standing-wave ratio, repeat said process.And relatively under two kinds of situations, detect voltage range and have or not lap, have and overlappingly judge that then power amplifier is defective, must debug again.
Described step 2 may further comprise the steps:
(1) from directional coupler sampling such as the stack of the signal energy of antenna port terminating load reflected back and other interference reflected signals etc., gives and export after fixed attenuator is further adjusted intensity through PA delivery outlet inside;
(2) wave detector conversion of signals that above-mentioned sampling is obtained is the easy-to-handle d. c. voltage signal that can reflect reflected signal strength;
(3) low-pass filter circuit carries out necessary Filtering Processing with the voltage signal that has the ripple interference of wave detector output again, improves accuracy of detection to satisfy the requirement of system.Filtered signal is sent into operational amplification circuit and is amplified, and sends after the voltage signal amplitude is adjusted to the amplitude that is fit to the A/D conversion.
In the described step 3, the backward power that backward power detects processing module output detects the input end of analog signal that voltage is admitted to A/D converter, portion finishes the conversion of analog to digital within it, and under the control of corresponding control signal, read via number bus by the DSP unit, finish the sampling that backward power detects voltage.
In the described step 4, the DSP unit detects the calibration data contrast of noting voltage and the electrically-erasable memory to the digitized backward power that reads from A/D converter in step 1, judge whether antenna port connection standing-wave ratio has at that time fallen into the alarm scope.For guaranteeing the accuracy of alarm, all exceed the standard of standard during the DSP programming as alarm with continuous correction data several times.
In the described step 5, the DSP unit is with the form output of final result relatively with high-low level.Handle for system program report network management level.
The present invention is by handling by DSP, and the introducing of DSP treatment technology and calibration procedure has been eliminated traditional standing-wave ratio alarm circuit of simple dependence hardware circuit realization in case the limitation that just can't consider extraneous mounting condition influence is again finished in debugging.Can only simply realize the antenna standing wave ratio alarm function, and mistake is alert, alarm dismissal probability is extremely low by the detected reflectance signal watt level.Described method uniqueness, novelty, described principle of device is simple, and is with low cost, and the development technique risk is little, the productibility height, helps large-scale mass production.
Description of drawings
The implement device structure chart of Fig. 1 antenna for base station standing-wave ratio alarm of the present invention;
The implementation method flow chart of Fig. 2 antenna for base station standing-wave ratio alarm of the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further details.
Fig. 1 is the implement device structure chart of antenna for base station standing-wave ratio alarm of the present invention.The reflection signal power of reflection antenna opening terminating load standing-wave ratio situation is sent into 112 pairs of sampled signal intensity of fixed attenuator through the sampling of directional coupler 111 coupling apertures and is done further adjustment, makes it fall into the optimum detection scope of used detection device.This attenuator is general to use simple resistance decrement network to get final product, and its attenuation is decided on specific design parameter such as the directional coupler degree of coupling, wave detector type, optimum detection scope, output amplitude index etc.113 reflection signal powers that are used for taking a sample out of wave detector are transformed into the d. c. voltage signal relevant with its intensity, reverse signal intensity and detect the different to some extent differences of the relation of voltage because of wave detector kind, model, have linear, have be exponential relationship.That use among the present invention is Schottky diode HSMS-2850 cheaply, and its detection curve to signal is an exponential curve.The d. c. voltage signal of wave detector 113 outputs can have ripple to be disturbed because of the non-permanent envelope trait of detected signal, influences accuracy of detection.So introduced necessary low-pass filter circuit 114 in this device again, realize with LC, RC network herein, reduce the influence of ripple.Low-pass filter circuit 114 filtered signals are admitted to operational amplification circuit 115 and carry out processing and amplifying, further adjust the amplitude of d. c. voltage signal and the relation curve slope of tested reverse signal and voltage.The A/D converter of exporting to then in the digital signal processing module 12 121 is converted to digital signal, links to each other respectively with DSP unit 123 with electrically-erasable memory 122 by number bus.Electrically-erasable memory 222 is used for storage calibration data when the antenna opening standing-wave ratio is calibrated, the DSP unit then is used at the actual operation of equipment real-time sampling, handles the detection voltage data that A/D converter 121 is sent here, and with memory 122 in normal data contrast, need to judge whether alarm.
Fig. 2 is the implementation method flow chart of antenna for base station standing-wave ratio alarm of the present invention.The implementation method of described antenna for base station standing-wave ratio alarm specifically may further comprise the steps:
The first step 202 before base station equipment is dispatched from the factory, is calibrated the full phased antenna mouth standing-wave ratio Monitoring Data that this standing-wave ratio alarm system carries out under design object standing-wave ratio x and the y.In the normal operation of equipment, calibration data will be judged the foundation of antenna opening standing-wave ratio state as this standing-wave ratio detection system.Calibration process can be consulted the above description of step 1 in detail, what will stress here is the jump phase shifting equipments that adopt switch control in the covert position device reality of using in the calibration process more, so that add automatic control, realize the automation and the high efficiency of calibration process.The backward power detection voltage output of noting in the calibration process is recorded in the electrically-erasable memory 122 under the control of DSP unit 123 and judges whether the requirement that meets the specification, and the PA module that calibration is not passed through can not adopt in the base station.
The 3rd step 204, the backward power detection signal is sampled, the output of operational amplification circuit 115 is wired to A/D converter 121 by the interface of intermodule, finish conversion from analog to digital, and under the commands for controlling of DSP unit 123, output on the number bus, the DSP unit then reads in this sampled data from bus, is temporarily stored in the internal register standby.
In the 4th step 205, the backward power that samples detects information processing, carries out in DSP unit 123.Briefly, be exactly that DSP unit 123 data that the sampled datas of reading in deposited in readable and writable memory 122 during with calibration are compared, detect voltage whether within the voltage range of target alarms standing-wave ratio correspondence with the standing-wave ratio of determining antenna opening external antenna load this moment.
In the 5th step 206, DSP unit 123 is exported according to system's agreement result with the form of high-low level.Handle for the monitoring of base station system program practical work, report network management level.
Claims (8)
1, a kind of implement device of antenna for base station standing-wave ratio alarm comprises: backward power detects processing module (11), digital signal processing module (12);
It is characterized in that described backward power detects processing module (11) and further comprises: directional coupler (111), fixed attenuator (112), wave detector (113), low-pass filter circuit (114), operational amplification circuit (115); Described digital signal processing module (12) further comprises: A/D converter (121), electrically-erasable memory (122), DSP unit (123);
Described directional coupler (111) the reverse signal power that is used to take a sample;
Described fixed attenuator (112) is used for sampled signal intensity is done further adjustment, makes it fall into the optimum detection scope of used detection device;
The reflected signal that described wave detector (113) is used for taking a sample out is transformed into the d. c. voltage signal relevant with its intensity;
Described low-pass filter circuit (114) is used for effectively reducing the amplitude of ripple;
Described operational amplification circuit (115) is used for filtered signal is carried out processing and amplifying, with the amplitude of adjustment detectable voltage signals and the relation curve slope characteristics of tested backward power and voltage;
The output that described A/D converter (121) is used for backward power is detected processing module (11) is converted to digital signal, links to each other respectively with DSP unit (123) with electrically-erasable memory (122) by number bus;
Described electrically-erasable memory (122) is used for storage calibration data when the antenna opening standing-wave ratio is calibrated;
Described DSP unit (123) is used for handling the detection voltage data that A/D converter (121) is sent here in real time in the actual operation of equipment, and with memory (122) in the normal data contrast, need to judge whether alarm.
2, a kind of implementation method of antenna for base station standing-wave ratio alarm is characterized in that, may further comprise the steps:
(1) by the phase varying device that links to each other with the antenna for base station mouth, adopting standing-wave ratio respectively is that x, y change signal phase continuously or jumpily in 360 ° of scopes, carries out full phased antenna mouth standing-wave ratio Monitoring Data calibration;
(2) backward power detects;
(3) digital signal processing module (12) is taken a sample to the backward power detection signal;
(4) digital signal processing module (12) is handled the digital information of the backward power detection signal that is sampled to;
(5) digital signal processing module (12) compares according to result and full phased antenna mouth standing-wave ratio Monitoring Data, judges whether to export the standing-wave ratio alarm signal.
3, the implementation method of antenna for base station standing-wave ratio alarm as claimed in claim 2 is characterized in that, described step (1) may further comprise the steps:
(1) power amplifier output power of base station equipment is adjusted to rated output power, turn-off input signal;
(2) standing-wave ratio be the mismatch load of x can be continuously by one or the covert position device that changes at least 360 ° of phase places that jumps link to each other with the antenna for base station mouth, the other end of phase varying device is connected on the delivery outlet of power amplifier; Open power amplifier output, in 360 ° of scopes, change signal phase continuously or jumpily by covert position device, read the maximum, the minimum value that detect voltage with the backward power of phase change, and under software control, write in the electrically-erasable memory (122);
(3) be that the mismatch load of x changes the load that standing-wave ratio is y into standing-wave ratio, in 360 ° of scopes, change signal phase continuously or jumpily by covert position device, read the maximum, the minimum value that detect voltage with the backward power of phase change, and compare under two kinds of situations, detect voltage range and have or not lap, have and overlappingly judge that then power amplifier is defective, must debug again.
4, the implementation method of antenna for base station standing-wave ratio alarm as claimed in claim 2 is characterized in that, described step (2) may further comprise the steps:
(1) detects directional coupler (111) sampling of processing module delivery outlet inside from the stack of the signal energy of antenna port terminating load reflected back and other interference reflected signals etc. through backward power, give and export after fixed attenuator (112) is further adjusted intensity;
(2) wave detector (113) conversion of signals that above-mentioned sampling is obtained is the easy-to-handle d. c. voltage signal that can reflect reflected signal strength;
(3) low-pass filter circuit (114) carries out necessary Filtering Processing with the voltage signal that has the ripple interference of wave detector output again, improves accuracy of detection, satisfies the requirement of system; Filtered signal is sent into operational amplification circuit (115) and is amplified, and sends after the voltage signal amplitude is adjusted to the amplitude that is fit to the A/D conversion.
5, the implementation method of antenna for base station standing-wave ratio alarm as claimed in claim 2 is characterized in that, described step (3) further comprises:
The backward power that backward power detects processing module output detects the input end of analog signal that voltage is sent into the A/D converter (121) of digital signal processing module, portion finishes the conversion of analog to digital within it, and under the control of corresponding control signal, DSP unit (123) by digital signal processing module reads through number bus, finishes the sampling that backward power detects voltage.
6, the implementation method of antenna for base station standing-wave ratio alarm as claimed in claim 2 is characterized in that, described step (4) further comprises:
The digitized backward power that the DSP unit of digital signal processing module reads the A/D converter (121) from digital signal processing module detects the calibration data contrast of noting voltage and the electrically-erasable memory (122) in described step (1), judge whether antenna port connection standing-wave ratio has at that time fallen into the alarm scope.
7, the implementation method of antenna for base station standing-wave ratio alarm as claimed in claim 6 is characterized in that, in the described step (4), for guaranteeing the accuracy of alarm, all exceeds the standard of standard as alarm with continuous correction data several times during the DSP programming.
8, the implementation method of antenna for base station standing-wave ratio alarm as claimed in claim 2, it is characterized in that, in the described step (5), the DSP unit (123) of digital signal processing module is handled the form output of final result relatively with high-low level for system program report network management level.
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| CN1909428B (en) * | 2005-08-04 | 2010-06-09 | 中兴通讯股份有限公司 | Standing-wave ratio alarm detecting device in GSM impellent system for enhancing data speed |
| CN1968243B (en) * | 2006-05-25 | 2010-12-08 | 华为技术有限公司 | Mean signal power detection method and system |
| CN101222739A (en) * | 2007-12-27 | 2008-07-16 | 华为技术有限公司 | Method, device and base station for standing wave detection |
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| CN102281112B (en) * | 2011-08-03 | 2014-06-11 | 京信通信***（中国）有限公司 | Standing wave scaling method and corresponding standing wave calibrating method for communication relay device |
| CN103108348A (en) * | 2011-11-15 | 2013-05-15 | 成都芯通科技股份有限公司 | Method for reflecting alarm and protecting repeater system |
| CN103944650B (en) * | 2013-01-22 | 2016-06-15 | 京信通信***（中国）有限公司 | Method for detecting standing wave and system |
| CN103297157B (en) * | 2013-05-08 | 2016-05-18 | 岳流锋 | A kind of antenna detection method of many antennas super high frequency electronic label read/write |
| CN104577332B (en) * | 2013-10-24 | 2017-09-01 | 展讯通信（上海）有限公司 | Improve spuious isolation closed-loop Tuning Control device and method between antenna |
| CN108124318B (en) * | 2014-09-28 | 2021-04-30 | 安科讯(福建)科技有限公司 | LTE wireless network card |
| CN105388371A (en) * | 2015-10-20 | 2016-03-09 | 北京中科飞鸿科技有限公司 | SCM standing-wave ratio monitoring circuit applied to power amplifier |
| CN110481595A (en) * | 2019-07-19 | 2019-11-22 | 黑龙江瑞兴科技股份有限公司 | A method of for carrying out malfunction monitoring to track circuit section |
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