CN105322979B - A kind of method that compensating wide band signal passes through frequency domain injustice caused by radio frequency link - Google Patents
A kind of method that compensating wide band signal passes through frequency domain injustice caused by radio frequency link Download PDFInfo
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- CN105322979B CN105322979B CN201410259033.8A CN201410259033A CN105322979B CN 105322979 B CN105322979 B CN 105322979B CN 201410259033 A CN201410259033 A CN 201410259033A CN 105322979 B CN105322979 B CN 105322979B
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- frequency
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Abstract
The present invention proposes that a kind of compensating wide band signal by the method for frequency domain injustice caused by radio frequency link, includes the following steps：Record the amplitude versus frequency characte table 1 of radio frequency link radio frequency part；Record the amplitude versus frequency characte table 2 of radio frequency link intermediate-frequency section；The amplitude versus frequency characte table 1 and amplitude versus frequency characte table 2 are subjected to data merging, broadband signal is generated and compensates table；Broadband signal is compensated by injustice caused by radio frequency link according to the compensation table.Method scheme proposed by the present invention is flexible, strong applicability.
Description
Technical field
The present invention relates to wireless communication fields more particularly to a kind of compensating wide band signal to pass through frequency domain caused by radio frequency link
Uneven method.
Background technology
In wireless communications, general transceiver, when the broadband signal of base band is by the radio frequency link of transceiver, letter
Number it can introduce injustice in frequency domain.The present invention causes the technical problem of frequency domain injustice for this broadband signal by radio frequency link,
It is proposed a kind of solution.
Invention content
In view of the above-mentioned problems, the present invention proposes a kind of side that compensating wide band signal passes through frequency domain injustice caused by radio frequency link
Method, this method include：Record the amplitude versus frequency characte table 1 of radio frequency link radio frequency part；The amplitude-frequency for recording radio frequency link intermediate-frequency section is special
Property table 2；The amplitude versus frequency characte table 1 and amplitude versus frequency characte table 2 are subjected to data merging, broadband signal is generated and compensates table；According to described
Compensation table compensates broadband signal by injustice caused by radio frequency link.
Wherein, the amplitude versus frequency characte table 1 of the record radio frequency link radio frequency part specifically includes：Fixed intermediate frequency local oscillator and base band
Frequency adjusts RF local oscillator by stepping 1, the prevention at radio-frequency port power under each stepping is recorded, to obtain the amplitude versus frequency characte table
1；The amplitude versus frequency characte table 2 of the record radio frequency link radio frequency part specifically includes：Fixed intermediate frequency local oscillator adjusts radio frequency by stepping 2
Local oscillator and base-band signal frequency record the prevention at radio-frequency port power under each stepping to ensure that radio frequency output frequency is constant, to
To the amplitude versus frequency characte table 2.Stepping 1 and stepping 2 are equal or different.The range that RF local oscillator is adjusted by stepping 1 is equal to or more than
System frequency width.The range that RF local oscillator and base-band signal frequency are adjusted by stepping 2 is equal to or more than transmitted broadband signal
Width.The stepping 1 and stepping 2 are less than or equal to broadband signal subcarrier spacing.
Further, the compensation is completed by being pre-processed in baseband signal, specially：It is searched in compensation table
The offset data of corresponding frequency point, according to the offset data in frequency domain compensation baseband signal power.
Technical solution proposed by the present invention, the radio frequency amplitude versus frequency characte table of acquisition are that full frequency band is continuous, so not only can be with
Calibration frequency point is compensated, the offset data of other frequencies between calibration frequency point approximate can also be obtained；In addition, if desired
Broader frequency band is calibrated, then only needs the sweep bandwidth for increasing intermediate-frequency section.It follows that method tool proposed by the present invention
There is the characteristics of scheme is flexible, strong applicability.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the radio frequency link structural schematic diagram of general wireless receiving and dispatching information；
Fig. 2 is the basic handling flow diagram of proposition method of the present invention；
Fig. 3 is the schematic diagram of the unevenness of scanning radio frequency part in proposition method of the present invention；
Fig. 4 is the schematic diagram of the unevenness of scanning intermediate-frequency section in proposition method of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments；It should be noted that in the absence of conflict, in the application
Embodiment and embodiment in feature can be combined with each other.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
In wireless communications, shown in general transceiver architecture attached drawing 1.Radio frequency link is divided into intermediate-frequency section and radio-frequency part
Point.Method proposed by the present invention obtains the injustice of radio-frequency channel introducing by the method that tone signal scans, and needs to obtain respectively
The injustice for taking channel intermediate-frequency section and radio frequency part to introduce, records intermediate frequency amplitude versus frequency characte table and radio frequency amplitude versus frequency characte table, then closes
At the amplitude versus frequency characte of entire radio-frequency channel.
Attached drawing 2 is please referred to, method proposed by the present invention includes following basic step：Record the width of radio frequency link radio frequency part
Frequency property list 1；Record the amplitude versus frequency characte table 2 of radio frequency link intermediate-frequency section；By the amplitude versus frequency characte table 1 and amplitude versus frequency characte table 2 into
Row data merge, and generate broadband signal and compensate table；Broadband signal is passed through according to the compensation table uneven caused by radio frequency link
It compensates.
Wherein, the amplitude versus frequency characte table 1 of the record radio frequency link radio frequency part specifically includes：Fixed intermediate frequency local oscillator and base band
Frequency adjusts RF local oscillator by stepping 1, the prevention at radio-frequency port power under each stepping is recorded, to obtain the amplitude versus frequency characte table
1；
The amplitude versus frequency characte table 2 of the record radio frequency link radio frequency part specifically includes：Fixed intermediate frequency local oscillator is adjusted by stepping 2
Whole RF local oscillator and base-band signal frequency record the prevention at radio-frequency port power under each stepping to ensure that radio frequency output frequency is constant,
To obtain the amplitude versus frequency characte table 2.
Further, stepping 1 can be arranged to equal with stepping 2, can also be unequal.Radio frequency sheet is adjusted by stepping 1
The range shaken can be equal to or more than system frequency width.The range that RF local oscillator and base-band signal frequency are adjusted by stepping 2 can
With the width equal to or more than transmitted broadband signal.The stepping 1 and stepping 2 are less than or equal between broadband signal subcarrier
Every.
In the above process, the compensation can be completed by being pre-processed in baseband signal, specially：In compensation table
The middle offset data for searching corresponding frequency point, according to the offset data in frequency domain compensation baseband signal power.
The implementation process of record radio frequency part amplitude versus frequency characte and intermediate-frequency section amplitude versus frequency characte is illustrated below by example.
The detailed process for recording radio frequency part amplitude versus frequency characte table is as follows：Fixed intermediate frequency local oscillator, baseband frequency, by adjusting penetrating
Frequency local oscillator scans the amplitude versus frequency characte of radio frequency part, and record prevention at radio-frequency port power records radio frequency amplitude versus frequency characte table.It refers to attached
Fig. 3, setting this example exports base-band signal frequency 8.25MHz, intermediate frequency local oscillator 418MHz, therefore intermediate frequency exports 426.25MHz, mixing
2 input signal of device remains unchanged；The input local oscillator of the frequency mixer 2 of adjustment scanning at this time, so that it may be introduced not with scanning radio frequency part
Pingdu.It is assumed that RF local oscillator stepping 250KHz, by testing the amplitude versus frequency characte that radio frequency power output is recordable radio frequency part.It converges
Record value under total each stepping is to get to complete radio frequency amplitude versus frequency characte table.
Record intermediate-frequency section amplitude versus frequency characte table process be：Fixed intermediate frequency local oscillator changes RF local oscillator, scans baseband signal
The change of frequency, base-band signal frequency is synchronous with the change of RF local oscillator signal, but the direction changed is on the contrary, baseband frequency changes
It is incremental, the change of RF local oscillator is successively decreased, and ensures that 2 output frequency of frequency mixer is fixed, logical to which intermediate-frequency section can be obtained
Road characteristic records prevention at radio-frequency port power, obtains the amplitude versus frequency characte of intermediate-frequency section.Please refer to attached drawing 4, it is assumed that base band exports maximum belt
Width is 5MHz, and in this example, output base-band signal frequency scanning direction is determined as from 5.5MHz to 10.5MHz, per stepping
250KHz, intermediate frequency local oscillator 418MHz, therefore intermediate frequency exports 423.5MHz~428.5MHz, frequency mixer 2 inputs local oscillator with base band
The change of frequency and change, ensure that the frequency that frequency mixer 2 exports remains unchanged as 1795MHz, since radio frequency output frequency is constant,
Therefore radio frequency power output injustice is just that intermediate-frequency section introduces, and the value for recording each stepping so just can record intermediate-frequency section
Amplitude versus frequency characte.Likewise, summarizing the record value under each stepping to get to complete intermediate frequency amplitude versus frequency characte table.
Since intermediate frequency local oscillator remains constant, so it is special that radio frequency amplitude-frequency may be selected according to radio frequency output frequency and bandwidth
Property table.The broadband signal of output center frequency 1795MHz is such as needed, then chooses this band frequency of 1792.5MHz~1797.5HHz
Radio frequency amplitude versus frequency characte table, then synthesized with intermediate frequency amplitude versus frequency characte table, you can obtain the radio frequency link compensation table in the frequency point.
Technical solution proposed by the present invention, the radio frequency amplitude versus frequency characte table of acquisition are that full frequency band is continuous, so not only can be with
Calibration frequency point is compensated, the offset data of other frequencies between calibration frequency point approximate can also be obtained；In addition, if desired
Broader frequency band is calibrated, then only needs the sweep bandwidth for increasing intermediate-frequency section.It follows that method tool proposed by the present invention
There is the characteristics of scheme is flexible, strong applicability.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer read/write memory medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes：ROM, RAM, magnetic disc or light
The various media that can store program code such as disk.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (7)
1. a kind of compensating wide band signal is included the following steps by the method for frequency domain injustice caused by radio frequency link：
The amplitude versus frequency characte table 1 for recording radio frequency link radio frequency part, specifically includes：Fixed intermediate frequency local oscillator and baseband frequency, by stepping 1
RF local oscillator is adjusted, the prevention at radio-frequency port power under each stepping is recorded, to obtain the amplitude versus frequency characte table 1；
The amplitude versus frequency characte table 2 for recording radio frequency link intermediate-frequency section, specifically includes：Fixed intermediate frequency local oscillator adjusts radio frequency sheet by stepping 2
It shakes with base-band signal frequency to ensure that the frequency of radio frequency output is constant, the prevention at radio-frequency port power recorded under each stepping obtains the frequency
The intermediate-frequency section amplitude versus frequency characte data of rate；The intermediate-frequency section amplitude versus frequency characte data of all required frequencies are obtained according to abovementioned steps；
The amplitude versus frequency characte data for summarizing all required frequencies, obtain the amplitude versus frequency characte table 2；
The amplitude versus frequency characte table 1 and amplitude versus frequency characte table 2 are subjected to data merging, broadband signal is generated and compensates table；
Broadband signal is compensated by injustice caused by radio frequency link according to the compensation table.
2. according to the method described in claim 1, it is characterized in that, the stepping 1 and stepping 2 are equal or different.
3. according to the method described in claim 1, it is characterized in that, it is described by stepping 1 adjust RF local oscillator range be equal to or
More than system frequency width.
4. according to the method described in claim 1, it is characterized in that, described adjust RF local oscillator and baseband signal frequency by stepping 2
The range of rate is equal to or more than the width of transmitted broadband signal.
5. according to the method described in claim 1, it is characterized in that, the stepping 1 and stepping 2 are less than or equal to broadband signal
Carrier wave interval.
6. according to the method described in claim 1, it is characterized in that, the compensation in baseband signal by being pre-processed come complete
At.
7. according to the method described in claim 6, it is characterized in that, the pretreatment is specially：It is searched in the compensation table
The offset data of corresponding frequency point, according to the offset data in frequency domain compensation baseband signal power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410259033.8A CN105322979B (en) | 2014-06-11 | 2014-06-11 | A kind of method that compensating wide band signal passes through frequency domain injustice caused by radio frequency link |
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| CN201410259033.8A CN105322979B (en) | 2014-06-11 | 2014-06-11 | A kind of method that compensating wide band signal passes through frequency domain injustice caused by radio frequency link |
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| CN106341195A (en) * | 2016-08-31 | 2017-01-18 | 上海无疆信息科技有限公司 | Calibration system facing radio frequency front end and calibration method |
| CN112838994B (en) * | 2019-11-22 | 2024-03-19 | 中兴通讯股份有限公司 | Link pre-equalization compensation method and device, storage medium and electronic device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1671064A (en) * | 2005-05-16 | 2005-09-21 | 北京北方烽火科技有限公司 | Method of frequency compensation for Direct Sequence Spread Spectrum (DSSS) mobile communication system |
| CN101075814A (en) * | 2007-05-10 | 2007-11-21 | 京信通信系统（中国）有限公司 | Digital receiver system based on special digital medium-frequency structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8195103B2 (en) * | 2006-02-15 | 2012-06-05 | Texas Instruments Incorporated | Linearization of a transmit amplifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1671064A (en) * | 2005-05-16 | 2005-09-21 | 北京北方烽火科技有限公司 | Method of frequency compensation for Direct Sequence Spread Spectrum (DSSS) mobile communication system |
| CN101075814A (en) * | 2007-05-10 | 2007-11-21 | 京信通信系统（中国）有限公司 | Digital receiver system based on special digital medium-frequency structure |
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