CN101119127A - Method to implement in-band gain balance of working frequency band for frequency-select module of repeater - Google Patents
Method to implement in-band gain balance of working frequency band for frequency-select module of repeater Download PDFInfo
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- CN101119127A CN101119127A CNA2007101519383A CN200710151938A CN101119127A CN 101119127 A CN101119127 A CN 101119127A CN A2007101519383 A CNA2007101519383 A CN A2007101519383A CN 200710151938 A CN200710151938 A CN 200710151938A CN 101119127 A CN101119127 A CN 101119127A
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Abstract
The invention relates to a method, basing on a straight laid and stand use frequency selection module which is used for realizing work bandwidth in-band gain balance. The method contains the following steps: firstly, the work bandwidth of the straight laid and stand use frequency selection module is divided into a plurality of frequency channels, gain compensate table of the end point and frequency point in each frequency channel is establised and kept; secondly, the straight laid and stand use frequency selection module takes the gain and compensate value of the corresponding frequency channels in accord with a prior work frequency point; thirdly, the needed gain and compensate value of each the prior work frequency point is worked out through the interpolation approach; fourthly, the worked out value compensates the gain of the prior work frequency point.
Description
Technical field
The present invention relates to a kind of repeater and realize the method for gain balance in the working band band with the frequency-selecting module.
Background technology
The repeater belongs to the frequency multiplying arrangement, is meant a kind of radio transmission transferring equipment that plays the signal humidification in the wireless communication transmissions process.The basic function of repeater is exactly a radiofrequency signal power intensifier.In down link, the repeater is pickoff signals in the existing overlay area of donor antenna,, filtered signal is transmitted into after power amplifier amplifies once more treats the overlay area carrying out fabulous isolation with leading to outer signal by band pass filter.In the uplink path, the signal of the travelling carriage mobile phone in the overlay area is transmitted into corresponding base station with same working method after by up amplification link processing, thereby reaches the signal transmission of base station and mobile phone.
Use the repeater as one of necessary means that realizes " low capacity, the big covering " target, mainly be owing to use the repeater to have the following advantages: the one, under the prerequisite that does not increase base station number, guarantee the network coverage, the 2nd, its cost is well below the micro cellular system that effect same is arranged.The repeater is to solve a kind of preferred version that communication network extends covering power.It has compared advantages such as simple in structure, that investment is less and easy for installation with the base station, can be widely used in the blind area and the weak district that are difficult to cover, as various places such as market, hotel, airport, harbour, station, gymnasium, amusement hall, subway, tunnel, highway, islands, improve communication quality, solve problems such as call drop.
In today that mobile communication develops rapidly, no matter adopt which kind of communication, all will produce weak signal area and blind area in the overlay area, and to some remote districts and the few blind area of number of users, it is too high to set up the base station cost, infrastructure is also complicated, provide for this reason a kind of cost low, set up simply, have but that small base station function, cost-effective equipment---repeater is necessary.Therefore, important role is being played the part of with the frequency-selecting module in the repeater in cordless communication network.
With in the frequency-selecting modular system, for frequency-selecting, is intermediate frequency with the uplink and downlink frequency down conversion in the repeater, carry out the tape handling of frequency-selecting limit after, up-conversion is recovered the uplink and downlink frequency again.
It mainly is to be realized by components and parts intermediate frequency Surface Acoustic Wave Filter and corresponding filter circuit that intermediate-freuqncy signal is carried out the tape handling of frequency-selecting limit.Because the characteristic of intermediate frequency Surface Acoustic Wave Filter is: frequency characteristic imbalance in whole frequency, accomplish that the frequency characteristic balance is difficult to realize in the whole frequency concerning device producer, therefore cause also presenting gain energy imbalance in the whole working frequency range through radiofrequency signal after the intermediate frequency process.
The method of dealing with is artificial adjustment at present, and there is following problem in this method: 1, do not realize intelligent product; 2, need carry out manual maintenance.
Summary of the invention
Purpose of the present invention is in order to overcome defective or the problem that above-mentioned prior art exists, and a kind of high reliability, high efficiency, simple the method for repeater with gain balance in the frequency-selecting modular belt that realize are provided.
This method comprises the steps:
A, the repeater is divided into a plurality of little frequency ranges with frequency-selecting module working band, sets up the gain compensation table of each frequency range end points frequency correspondence and preserve;
B, repeater according to current self working frequency points, transfer the gain compensation value of corresponding frequency band with the frequency-selecting module;
C, employing interpolation calculation method calculate the required gain compensation value of current working frequency;
The interpolation calculation formula is as follows:
Gf＝Gfi+(f-fi)*(Gfi+1-Gri)/(fi+1-fi)
Gfi: the corresponding gain compensation value of the frequency low side of current working frequency place frequency range,
Gfi+1: the high-end corresponding gain compensation value of the frequency of current working frequency place frequency range,
F: current working frequency,
Fi: the low side frequency of current working frequency place frequency range,
Fi+1: the high-end frequency of current working frequency place frequency range,
Gf: the corresponding gain compensation value of current working frequency,
The value that d, basis are calculated compensates the gain of current working frequency.
By the application of foregoing invention technical scheme, can make the repeater realize gain balance in the band with the frequency-selecting module.Before this invention was used, if gain deviation in the discovery band needs the artificial field adjustable that arrives, the follow-up time was slow, the labor intensive resource; Use this invention then to guarantee the balance of gain in the band, do not need personnel's maintenance, save human resources, reduce the total maintenance cost in repeater.
Description of drawings
Fig. 1 is the repeater frequency of each frequency range in the frequency-selecting module working band band and the coordinate diagram of corresponding gain;
Fig. 2 realizes the flow chart of gain balance method in the working band band with the frequency-selecting module for repeater of the present invention.
Embodiment
In order to make the solution of the present invention clearer, the present invention is described in more detail below in conjunction with example.
Fig. 1 is that the repeater is with in the frequency-selecting module working band band, the coordinate diagram of the frequency of each frequency range and corresponding gain, suppose that the repeater drops between as shown in Figure 1 f2 to the f3 frequency range with frequency-selecting module work at present frequency, promptly the repeater with frequency-selecting module current working frequency f between frequency range f2 to f3.According to the interpolation calculation formula
Gf＝Gri+(f-fi)*(Gfi+1-Gri)/(fi+1-fi)
Can calculate the gain compensation value Gf of current working frequency f correspondence
The flow process that realizes the present invention program in conjunction with example is as follows:
Step a, the repeater is divided into a plurality of little frequency ranges with frequency-selecting module working band, the division of frequency band can be determined according to the band bandwidth of module and the characteristic of used intermediate frequency sound table.The band bandwidth of now supposing module is 30MHz (megahertz), the characteristic of intermediate frequency sound table is that every 1MHz change in gain is little at interval, so just can be to be the individual frequency range of 20-50 (or other frequency band number that need) at interval with frequency band division with 1MHz, here we are example with 30, then the low side frequency and the high-end frequency of each little frequency range are tested its gain respectively, calculate with the difference of standard gain and set up a gain compensation table and preservation;
Step b, repeater according to current self working frequency points, transfer the gain compensation value of corresponding frequency band with the frequency-selecting module;
Step c, employing interpolation calculation method calculate the required gain compensation value of current working frequency;
Interpolation calculation formula following (supposing that current working frequency f is between frequency range f2 to f3):
Gf＝Gf2+(f-f2)*(Gf3-Gf2)/(f3-f2)
Gf2: the corresponding gain compensation value of the frequency low side of current working frequency place frequency range,
Gf3: the high-end corresponding gain compensation value of the frequency of current working frequency place frequency range,
F: current working frequency,
F2: the low side frequency of current working frequency place frequency range,
F3: the high-end frequency of current working frequency place frequency range,
Gf: the corresponding gain compensation value of current working frequency,
The value that steps d, basis are calculated compensates the gain of current working frequency.
The flow chart of above step as shown in Figure 2.
The foregoing description only is exemplary, it will be apparent to those skilled in the art that not break away from the spirit and scope of the present invention, can make amendment and changes the present invention.Scope of the present invention is defined by appended claim.
Claims (3)
1. the method based on gain balance in the repeater usefulness frequency-selecting module realization working band band is characterized in that this method comprises the steps:
A, the repeater is divided into a plurality of little frequency ranges with frequency-selecting module working band, sets up the gain compensation table of each frequency range end points frequency correspondence and preserve;
B, repeater according to current self working frequency points, transfer the gain compensation value of corresponding frequency band with the frequency-selecting module;
C, employing interpolation calculation method calculate the required gain compensation value of current working frequency;
The value that d, basis are calculated compensates the gain of current working frequency.
2. method according to claim 1, wherein dividing the algorithm that frequency range sets up the gain compensation table is: working band is divided into a plurality of little frequency ranges, low side frequency and high-end frequency to little frequency range are tested its gain respectively, calculate with the difference of standard gain and set up a gain compensation table and preservation.
3. method according to claim 1, wherein the algorithm of interpolation calculation is: according to current working frequency, transfer the gain compensation value of corresponding frequency band, utilize formula Gf=Gfi+ (f-fi) * (Gfi+1-Gfi)/(fi+1-fi) to calculate the required gain compensation value of current working frequency, wherein
Gfi: the corresponding gain compensation value of the frequency low side of current working frequency place frequency range,
Gfi+1: the high-end corresponding gain compensation value of the frequency of current working frequency place frequency range,
F: current working frequency,
Fi: the low side frequency of current working frequency place frequency range,
Fi+1: the high-end frequency of current working frequency place frequency range,
Gf: the corresponding gain compensation value of current working frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101519383A CN101119127B (en) | 2007-09-21 | 2007-09-21 | Method to implement in-band gain balance of working frequency band for frequency-select module of repeater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101519383A CN101119127B (en) | 2007-09-21 | 2007-09-21 | Method to implement in-band gain balance of working frequency band for frequency-select module of repeater |
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| CN101119127A true CN101119127A (en) | 2008-02-06 |
| CN101119127B CN101119127B (en) | 2010-04-07 |
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| CN2007101519383A Expired - Fee Related CN101119127B (en) | 2007-09-21 | 2007-09-21 | Method to implement in-band gain balance of working frequency band for frequency-select module of repeater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664599A (en) * | 2012-04-05 | 2012-09-12 | 华为技术有限公司 | Gain compensation method in band-cross measurement and device thereof |
| CN109462431A (en) * | 2018-12-07 | 2019-03-12 | 京信通信系统（中国）有限公司 | A kind of signal gain compensation method and equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426682C (en) * | 2005-07-19 | 2008-10-15 | 中兴通讯股份有限公司 | Method for correcting power |
| CN100586047C (en) * | 2006-06-15 | 2010-01-27 | 北京北方烽火科技有限公司 | TD-SCDMA signal generator |
-
2007
- 2007-09-21 CN CN2007101519383A patent/CN101119127B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664599A (en) * | 2012-04-05 | 2012-09-12 | 华为技术有限公司 | Gain compensation method in band-cross measurement and device thereof |
| CN109462431A (en) * | 2018-12-07 | 2019-03-12 | 京信通信系统（中国）有限公司 | A kind of signal gain compensation method and equipment |
| CN109462431B (en) * | 2018-12-07 | 2021-05-18 | 京信通信系统（中国）有限公司 | Signal gain compensation method and device |
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| Publication number | Publication date |
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| CN101119127B (en) | 2010-04-07 |
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