CN1909428B - Standing-wave ratio alarm detecting device in GSM impellent system for enhancing data speed - Google Patents
Standing-wave ratio alarm detecting device in GSM impellent system for enhancing data speed Download PDFInfo
- Publication number
- CN1909428B CN1909428B CN200510089144XA CN200510089144A CN1909428B CN 1909428 B CN1909428 B CN 1909428B CN 200510089144X A CN200510089144X A CN 200510089144XA CN 200510089144 A CN200510089144 A CN 200510089144A CN 1909428 B CN1909428 B CN 1909428B
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal
- standing
- wave ratio
- detecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention relates to a standing-wave ratio alarm checker used in GSM system, for improving the data speed, wherein it comprises a detecting circuit and a signal processing circuit; the detecting circuit comprises a semi mean square root power detecting circuit for detecting forward and backward couple signal powers; the semi mean square root power detecting circuit comprises detecting chip, whose annular filter integral capacitor pin is connected to low-pass filter circuit, to separate the nearby detected time slit signals, and smoothen the signal fluctuation in the time slit; each detecting chip converts the detected forward and backward couple powers into relative voltage signals to input them into signal processing circuit. The invention can smooth the signal fluctuation most, while the nearby time slit signals can be separated by EDGE detecting signal, to improve the anti-interference property.
Description
Technical field
The present invention relates to a kind of GSM evolution (Enhanced Data rates for GSMEvolution, EDGE) standing-wave ratio alarm detecting device in the system that strengthens data rate.
Background technology
EDGE is a kind of evolution scheme of GSM, is the transitional technology between 2.5G (the 2.5th generation) mobile network and 3G (the 3rd generation) mobile network.
Whether in order to check the coupling between the base stations in mobile communication system radio-frequency unit good, common voltage standing-wave ratio (VSWR) is weighed.Voltage standing wave ratio is meant that two rightabout capable ripples stack backs form standing waves, the ratio of the maximum of voltage or electric current and minimum value.
Wherein, Po represents to enter the power of antenna system, and Pr represents the power that reflects from antenna system.Certainly, the mode that is used for characterizing standing-wave ratio has many kinds, but principle is all similar.Usually, the standing-wave ratio alarm testing circuit is arranged in the front end of base stations in mobile communication system radio frequency side, and its core is front end detecting circuit and back end signal treatment circuit.
Because the EDGE signal is TDMA (TimeDivision Multiple Access, the time division multiple access) signal that adopts 8PSK (8 system phase-shift keying) modulation system, so just possessed two characteristics of high peak-to-valley ratio and time slot simultaneously.The general peak detection mode of employing of institute when past GSM standing-wave ratio detects, though the time slot characteristic of stick signal well, but because the EDGE signal has very high peak-to-valley ratio, so the fluctuation of rectified signal in time slot that just causes this mode to detect is excessive, thereby can cause the disorder of back analog operational circuit, be unaccommodated with peak detection to the EDGE signal.Can distinguish because of the signal of the adjacent time-slots after the time slot characteristic requirement detection of EDGE again, and common RMS (Root Mean Square, the cost of the signal in the fully level and smooth EDGE time slot of detection mode root mean square) has been sacrificed the time slot characteristic of signal, thereby cause the signal after the detection can't distinguish adjacent time-slots, therefore this detection mode also is unaccommodated to the EDGE signal.
And, in the EDGE system, the requirement of back end signal treatment circuit also is enhanced.Because the complexity of EDGE signal itself is the retardance of wireless signal and the uncertainty of backward channel in addition, if the signal of handling after the detection with traditional single signal processing circuit tends to bring a lot of addition products like this, the result that these addition products cause is exactly alarm by mistake.And the influence that this mistake is alarmed system is huge.
Summary of the invention
There is the problem and shortage of mistake alarm at standing-wave ratio alarm detecting device in the above-mentioned existing EDGE system, the purpose of this invention is to provide and a kind ofly distinguish the signal fluctuation in adjacent time-slots signal and the level and smooth time slot and can avoid standing-wave ratio alarm detecting device in the GSM evolution system of enhancing data rate of mistake alarm.
The present invention is achieved in that standing-wave ratio alarm detecting device in a kind of GSM evolution system that strengthens data rate, comprise detecting circuit and signal processing circuit, described detecting circuit comprises the half mean effective power detecting circuit that is respectively applied for detection forward direction coupled signal power and reverse coupled signal power, described half mean effective power detecting circuit comprises the detection chip, the loop filter integrating capacitor pin place of this detection chip is connected with low-pass filter circuit (LowPass Filter, LPF), guaranteeing to distinguish the adjacent detection time slot signal for the treatment of, and make the signal fluctuation in the time slot level and smooth; Described each detection chip will detected respectively forward direction and the reverse coupled signal power be converted to corresponding level signal and input to described signal processing circuit.
Preferably, described signal processing circuit comprises computing circuit and comparison circuit, and wherein, described computing circuit is used for half mean effective power detecting circuit of forward direction and reverse coupled signal is carried out subtraction, obtains difference signal, amplifies back input comparison circuit; Described comparison circuit carries out threshold judgement to the difference signal of this input, and will characterize the level signal output of court verdict.
Preferably, described computing circuit is provided with reference voltage (Vref) input interface, sues for peace with this reference voltage after difference signal is amplified again, and summed result is imported described comparison circuit.
Preferably, this device also comprises second threshold circuit that is used for having or not the forward direction coupled signal to adjudicate, and this second threshold circuit includes comparison circuit; Accordingly, the comparison circuit output also is serially connected with logical circuit in the described signal processing circuit, and the court verdict of described second threshold circuit is also imported this logical circuit.Described logical circuit is a biconditional gate, has the comparison circuit of forward direction coupled signal and described signal processing circuit to adjudicate when exceeding threshold level described logical circuit outputting alarm signal.
Preferably, the comparison circuit output of described second threshold circuit and the logic circuit output end of signal processing circuit are respectively equipped with low-pass filter circuit.
Here, half mean effective power detecting circuit of described forward direction coupled signal and reverse coupled signal is identical; Described detection chip is AD8362.
Compared with prior art, the present invention has the following advantages:
1, the present invention does not adopt traditional peak detection mode, does not adopt RMS detection mode fully yet.The present invention adopts is detection mode between peak detection and RMS detection, is called half RMS detection.This half RMS detection is not the RMS detection on the complete meaning.Its utilize to change the mode of the peripheral filter circuit of RMS detection chip, is guaranteeing that the EDGE rectified signal can distinguish the signal fluctuation in the level and smooth as far as possible time slot under the prerequisite of adjacent time-slots signal, rather than level and smooth completely.Though utilize the signal after this mode detection still to also have fluctuation in time slot, it is level and smooth much to compare peak detection, and the influence that these fluctuations cause also is easy to eliminate by the processing of subsequent conditioning circuit.
2, thoroughly eliminated the negative level that may occur by in signal processing, introducing Vref.This is not only that forward direction and reverse signal detection result have been carried out simple operation.But utilize the signal after Vref and the top computing to sue for peace.Because the complexity of reverse signal obtains negative level after forward direction and the reverse rectified signal computing possibly.Traditional design does not process negative level.But negative level can cause the logic disorder in the follow-up signal processing.And because the high peak valley specific characteristic of EDGE, the probability that negative level occurs will be far longer than GSM.Can eliminate the mistake alarm well by introducing this Vref external voltage.
3, the present invention takes the mode of secondary judgement to alarm signal.Judgement for the first time at be the signal that can characterize the standing-wave ratio characteristic; The forward power court verdict has been introduced in judgement for the second time.Have only the standing-wave ratio alarm signal of when forward direction power decision signal is effective, just thinking by judgement for the first time effective.The employing of the mechanism of secondary judgement of the present invention has improved the anti-interference of circuit and the authenticity of alarm signal greatly.
Description of drawings
Fig. 1 is an electrical block diagram of the present invention;
Fig. 2 is the structural representation of the AD8632 detection chip that adopts of the present invention;
Fig. 3 is the structural representation of the present invention's half RMS detecting circuit.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, the present invention comprises the signal processing circuit 13 of detecting circuit 11, second threshold circuit 12 and the rear end of front end generally.The detecting circuit 11 of front end comprises two identical half RMS detecting circuits 111 and 112, is respectively applied for forward power coupled signal and backward power coupled signal, and that this two detecting circuit is exported is respectively forward direction rectified signal A and reverse rectified signal B.
Shown in Fig. 2,3, the present invention's half RMS detecting circuit is mainly by core component---and the detection chip constitutes.Detection chip of the present invention adopts the RMS detection chip AD8362 of AD company.AD8362 adopts 16 mount structures, can carry out the real effective power measurement, and having with dB is the linear response of unit.The AD8362 pin is arranged shown in Fig. 2,3, and wherein, COMM is the common ground end; CHPF is the high pass filter input, and the capacitance size between this pin and the ground is determining to import the 3dB frequency of high pass filter; INHI is "+" end of signal differential input port; INLO is "-" end of signal differential input port; DECL is the decoupling end of " INHI " and " INLO "; PWDN is the dormancy control end, and device turn-offs during high level; CLPF is a loop filter integrating capacitor link; ACOM is the common ground end of output amplifier; VSET makes the input power of radio frequency corresponding with the dB number of output for voltage input end is set; VOUT is the output of error amplifier voltage, directly links to each other with " VSET " end during measurement; VPOS is+power input of 5V; VTGT is a reference voltage terminal; VREF is the output of 1.25V generalized reference voltage, can directly offer " VTGT " end.What be connected in INHI pin and INLO pin simultaneously is the ladder shaped resistance attenuator.
For realizing the detection of EDGE signal better, as shown in Figure 3, " CLPF " pin is connected in passive low-pass filter circuit, and the resistance of the appearance value of the capacitor C 3 by selecting to be connected in this pin and resistance R 10 reaches the purpose of half RMS detection.Half RMS detection mode of the present invention is the detection mode between RMS detection mode and peak detection mode, can distinguish two adjacent detection time slots, but has kept the certain fluctuation in the time slot.
As shown in Figure 1, second threshold circuit 12 comprises comparison circuit 121 and low-pass filter circuit (LPF) 122, it is connected in series, the signal A of half RMS detecting circuit, 111 outputs imports comparison circuit 121 and computing circuit 131 simultaneously, and whether this comparison circuit 121 is used for having forward direction rectified signal A to adjudicate, and when the meritorious rate of forward direction is launched, is output as high level signal, otherwise the output low level signal, output signal E is to logical circuit 133 after low-pass filter circuit 122 filtering.Signal processing circuit 13 comprises computing circuit 131, comparison circuit 132, logical circuit 133 and low-pass filter circuit 134, and it is connected successively, also is provided with the Vref connecting line on the computing circuit 131.Computing circuit 131 is used for forward direction rectified signal A and reverse rectified signal B subtraction are obtained reflecting the difference signal of standing-wave ratio, is to improve sensitivity, and computing circuit 131 also amplifies computing to difference; For eliminating the negative level that may occur, computing circuit 131 also carries out add operation with above-mentioned difference operation result and Vref, obtain to characterize the signal D of standing-wave ratio, and export signal D to comparison circuit 132 and carry out the threshold judgement first time, promptly make the standing-wave ratio judgement of system, if exceed threshold value, then the standing-wave ratio alarm high level signal F after the output judgement for the first time is to logical circuit 133, if be lower than threshold value, then output low level signal.What the logic was here selected is biconditional gate.Promptly have only the alarm signal G that exports during simultaneously for high level as signal E and signal F just to be high level.Owing to may be mixed with the burr signal that produces in the processing among the signal G, need the burr in low-pass filter circuit 134 filtered signal G, and export final standing-wave ratio alarm signal.Only that is to say that when the two-stage thresholding all passed through, alarm signal just finally was identified.
It will be appreciated by those skilled in the art that comparison circuit, computing circuit, low-pass filter circuit and logical circuit are ripe circuit.
In addition, second threshold circuit 12 is optional device, and logical circuit 133 also is optional device simultaneously, can realize goal of the invention by the detecting circuit 11 of front end and the signal processing circuit 13 of rear end.In addition, low-pass filter circuit 134, Vref incoming line equally also are optionally, do not have them, also can realize goal of the invention.Detection chip of the present invention can also be realized the detection chip or the circuit of detection function of the present invention for other is any.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those skilled in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (7)
1. standing-wave ratio alarm detecting device in the GSM evolution system that strengthens data rate, comprise detecting circuit and signal processing circuit, it is characterized in that, described detecting circuit comprises the half mean effective power detecting circuit that is respectively applied for detection forward direction coupled signal power and reverse coupled signal power, described half mean effective power detecting circuit comprises the detection chip, the loop filter integrating capacitor pin place of this detection chip is connected with low-pass filter circuit, guaranteeing to distinguish the adjacent detection time slot signal for the treatment of, and make the signal fluctuation in the time slot level and smooth; Described each detection chip will detected respectively forward direction and the reverse coupled signal power be converted to corresponding level signal and input to described signal processing circuit;
Wherein, described signal processing circuit comprises computing circuit and comparison circuit; Described computing circuit is used for half mean effective power detecting circuit of forward direction and reverse coupled signal is carried out subtraction, obtains difference signal, amplifies back input comparison circuit; Described comparison circuit carries out threshold judgement to the difference signal of this input, and will characterize the level signal output of court verdict.
2. standing-wave ratio alarm detecting device in the GSM evolution system of enhancing data rate according to claim 1, it is characterized in that, described computing circuit is provided with the reference voltage input interface, to sue for peace with this reference voltage again after the difference signal amplification, and summed result is imported described comparison circuit.
3. standing-wave ratio alarm detecting device in the GSM evolution system of enhancing data rate according to claim 1 and 2, it is characterized in that, this device also comprises second threshold circuit that is used for having or not the forward direction coupled signal to adjudicate, and this second threshold circuit includes comparison circuit; Accordingly, the comparison circuit output also is serially connected with logical circuit in the described signal processing circuit, and the court verdict of described second threshold circuit is also imported this logical circuit.
4. standing-wave ratio alarm detecting device in the GSM evolution system of enhancing data rate according to claim 3, it is characterized in that, described logical circuit is a biconditional gate, there is the comparison circuit of forward direction coupled signal and described signal processing circuit to adjudicate when exceeding threshold level described logical circuit outputting alarm signal.
5. standing-wave ratio alarm detecting device in the GSM evolution system of enhancing data rate according to claim 3, it is characterized in that the comparison circuit output of described second threshold circuit and the logic circuit output end of signal processing circuit are respectively equipped with low-pass filter circuit.
6. standing-wave ratio alarm detecting device in the GSM evolution system of enhancing data rate according to claim 1 is characterized in that, half mean effective power detecting circuit of described forward direction coupled signal and reverse coupled signal is identical.
7. standing-wave ratio alarm detecting device in the GSM evolution system of enhancing data rate according to claim 1 is characterized in that, described detection chip is AD8362.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510089144XA CN1909428B (en) | 2005-08-04 | 2005-08-04 | Standing-wave ratio alarm detecting device in GSM impellent system for enhancing data speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510089144XA CN1909428B (en) | 2005-08-04 | 2005-08-04 | Standing-wave ratio alarm detecting device in GSM impellent system for enhancing data speed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1909428A CN1909428A (en) | 2007-02-07 |
| CN1909428B true CN1909428B (en) | 2010-06-09 |
Family
ID=37700428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510089144XA Expired - Fee Related CN1909428B (en) | 2005-08-04 | 2005-08-04 | Standing-wave ratio alarm detecting device in GSM impellent system for enhancing data speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1909428B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101541034B (en) * | 2008-03-18 | 2012-04-11 | 中兴通讯股份有限公司 | Method and device for authenticating standing-wave ratio alarm |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5724003A (en) * | 1995-12-29 | 1998-03-03 | Maxim Integrated Products, Inc. | Methods and apparatus for signal amplitude control systems |
| CN1315661A (en) * | 2000-03-30 | 2001-10-03 | 华为技术有限公司 | Method and device for measuring standing-wave ratio |
| WO2004075401A1 (en) * | 2003-02-14 | 2004-09-02 | Analog Devices, Inc. | System and method for reducing transfer function ripple in a logarithmic rms-to-dc converter |
| CN1553200A (en) * | 2003-06-03 | 2004-12-08 | 李乃堂 | Integrated unitary standing-wave ratio measuring module design method |
| CN1633197A (en) * | 2003-12-24 | 2005-06-29 | 中兴通讯股份有限公司 | An apparatus and method for implementing base station antenna standing-wave ratio alarm |
-
2005
- 2005-08-04 CN CN200510089144XA patent/CN1909428B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5724003A (en) * | 1995-12-29 | 1998-03-03 | Maxim Integrated Products, Inc. | Methods and apparatus for signal amplitude control systems |
| CN1315661A (en) * | 2000-03-30 | 2001-10-03 | 华为技术有限公司 | Method and device for measuring standing-wave ratio |
| WO2004075401A1 (en) * | 2003-02-14 | 2004-09-02 | Analog Devices, Inc. | System and method for reducing transfer function ripple in a logarithmic rms-to-dc converter |
| CN1553200A (en) * | 2003-06-03 | 2004-12-08 | 李乃堂 | Integrated unitary standing-wave ratio measuring module design method |
| CN1633197A (en) * | 2003-12-24 | 2005-06-29 | 中兴通讯股份有限公司 | An apparatus and method for implementing base station antenna standing-wave ratio alarm |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1909428A (en) | 2007-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101834677B (en) | Base band power statistic-based standing wave detecting system and method for radio frequency remote system | |
| CN101119119B (en) | Method and apparatus for detecting open circuit fault of transmitter | |
| CN101477147B (en) | Circuit for detecting radio frequency power | |
| CN102545949A (en) | Radio frequency amplitude keying demodulation circuit with large input dynamic range | |
| CN106685425A (en) | Audio signal processing device and analog front-end circuit thereof | |
| CN103187938B (en) | It is a kind of to be used for the difference analogue fore device of low frequency signal detection and Transmission system | |
| CN105684304A (en) | Trans-impedance amplifier circuit | |
| CN107911093A (en) | Automatic growth control agc circuit, method and apparatus | |
| CN103457548A (en) | Radio frequency circuit power amplifier protection device and transmitter | |
| CN112564726B (en) | Receiver broadband large dynamic automatic gain control circuit | |
| CN101714851A (en) | ASK/OOK modulating mode detecting circuit | |
| CN1909428B (en) | Standing-wave ratio alarm detecting device in GSM impellent system for enhancing data speed | |
| CN103023445B (en) | A kind ofly to detect and the difference analogue fore device of transmission system for low frequency signal | |
| CN102571021B (en) | Infrared receiving circuit for automatically adjusting gain of band-pass filter | |
| CN218829866U (en) | Radio frequency power amplifier and radio frequency chip | |
| CN106330243B (en) | A kind of method and device of the receiving sensitivity switching of terminal | |
| CN115801044A (en) | Broadband low-voltage power line carrier and micropower wireless dual-mode communication chip | |
| CN220084961U (en) | Voltage signal amplitude limiting judging device | |
| CN210927583U (en) | Two-stage protection circuit for RF power amplitude limiting | |
| CN201039085Y (en) | RF demodulation circuit | |
| CN202837465U (en) | Circuit for detecting output port connection state of power amplification module | |
| CN101523225B (en) | Radio frequency handling device | |
| CN106713703A (en) | Amplification system and amplification method for video output signal of radio frequency power probe | |
| CN212965129U (en) | Differential sampling circuit for multi-path alternating current distribution voltage | |
| CN218550159U (en) | Audio squelch circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20150804 |
|
| EXPY | Termination of patent right or utility model |