CN109547036A - A kind of Broad-band Modulated Signal frequency response precompensation method - Google Patents
A kind of Broad-band Modulated Signal frequency response precompensation method Download PDFInfo
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- CN109547036A CN109547036A CN201811207034.2A CN201811207034A CN109547036A CN 109547036 A CN109547036 A CN 109547036A CN 201811207034 A CN201811207034 A CN 201811207034A CN 109547036 A CN109547036 A CN 109547036A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
- H04B1/0035—Channel filtering, i.e. selecting a frequency channel within a software radio system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
- H04B1/0039—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage using DSP [Digital Signal Processor] quadrature modulation and demodulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
- H04L2027/0032—Correction of carrier offset at baseband and passband
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention discloses a kind of Broad-band Modulated Signal frequency response precompensation methods, belong to the generation of the 5th third-generation mobile communication (5G) middle width strip signal and analysis field, include the following steps: to obtain the frequency response with the actual channel of broadband signal similar frequency bands by a frequency scan pattern test；Frequency response to actual channel carries out digital normalized；Reciprocal is asked to the frequency response of the actual channel after digital normalized, obtains compensation frequency response A (f)；The new filtering factor after actual signal channel is repaid in supplement；New filtering factor is loaded into FIR filter, obtains compensated channel frequency response.The present invention realizes the frequency response to the frequency point broadband signal and carries out effective compensation, improves channel quality, improves the modulation and demodulation index of 5G signal.
Description
Technical field
The invention belongs to the generation of the 5th generation communication technology (5G) middle width strip signal and analysis fields, and in particular to a kind of broadband
Modulated signal frequency response precompensation method.
Background technique
In the 5th third-generation mobile communication technology (5G), broadband transmission channel is an important development direction, radio frequency band
Channel bandwidth requirement reaches 100MHz, and millimeter wave frequency band requires to reach 500MHz, more demanding with interior frequency response, and in actual work
In Cheng Yingyong, the frequency response of broad-band channel is poor with interior frequency response since the performance of device limits.
As shown in attached drawing 1, attached drawing 2, communication signal channel includes launch channel and receives channel, mainly by 1. digital signal
2. 3. radio-frequency channel three parts form digital-to-analogue/AD conversion unit generation/analytical unit, and three units can all cause signal of communication
Frequency response is uneven, and frequency response compensation common at present mostly uses the method calibrated point by point, and each frequency point is logical by control radio frequency
Road attenuator and amplifier just corresponding power control, transfer the calibration data of each frequency point in frequency range and do linear fit etc.
Algorithm guarantees frequency range frequency response, and still, since Broad-band Modulated Signal is organic whole, the same time occupies certain bandwidth, and frequency response is dynamic
State variation can not guarantee the index of modulated signal with the method calibrated point by point.
Summary of the invention
For the above-mentioned technical problems in the prior art, the invention proposes a kind of Broad-band Modulated Signal frequency responses to mend in advance
Compensation method, design rationally, overcome the deficiencies in the prior art, have good effect.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of Broad-band Modulated Signal frequency response precompensation method is carried out in accordance with the following steps using FPGA:
Step 1: being tested by frequency scan pattern, obtain ringing with the frequency of the actual channel of broadband signal similar frequency bands
It answers；
Step 2: the frequency response to the actual channel in step 1 carries out digital normalized；
Step 3: reciprocal being asked to the frequency response of the actual channel after the digital normalized in step 2, is compensated
Frequency response A (f)；
Step 4: the new filtering factor after actual signal channel is repaid in supplement；
If the filtering factor of the FIR filter in FPGA is h (t), then its Fourier transformation is H (f), by H (f) and step
Compensation frequency response A (f) in 3 is multiplied point by point obtains combination frequency response HA (fN)=H (fN)×A(fN), wherein N=0,1 ... ... n, so
Afterwards to N number of HA (fN) carry out inverse-Fourier transform obtain N number of target filtering factor ha (t), as compensation actual signal channel after
New filtering factor；
Step 5: new filtering factor obtained in step 4 being loaded into FIR filter, obtains compensated channel frequency response.
Advantageous effects brought by the present invention:
The method of the present invention realizes the frequency response to the frequency point broadband signal and carries out effective compensation, improves channel quality, mentions
The modulation and demodulation index of 5G signal of communication are risen.
Detailed description of the invention
Fig. 1 is communication signal emitting channel circuit figure.
Fig. 2 is signal of communication receiving channel circuit diagram.
Fig. 3 is compensating for frequency response flow chart of the invention.
Fig. 4 is the practical frequency response schematic diagram of channel before compensating.
Fig. 5 is channel frequency response schematic diagram after compensation.
Specific embodiment
With reference to the accompanying drawing and specific embodiment invention is further described in detail:
A kind of Broad-band Modulated Signal frequency response precompensation method, process is as shown in figure 3, using FPGA, in accordance with the following steps
It carries out:
Step 1: being tested by frequency scan pattern, obtain ringing with the frequency of the actual channel of broadband signal similar frequency bands
It answers；
Step 2: the frequency response to the actual channel in step 1 carries out digital normalized；
Step 3: reciprocal being asked to the frequency response of the actual channel after the digital normalized in step 2, is compensated
Frequency response A (f)；
Step 4: the new filtering factor after actual signal channel is repaid in supplement；
If the filtering factor of the FIR filter in FPGA is h (t), then its Fourier transformation is H (f), by H (f) and step
Compensation frequency response A (f) in 3 is multiplied point by point obtains combination frequency response HA (fN)=H (fN)×A(fN), wherein N=0,1 ... ... n, so
Afterwards to N number of HA (fN) carry out inverse-Fourier transform obtain N number of target filtering factor ha (t), as compensation actual signal channel after
New filtering factor；
Step 5: new filtering factor obtained in step 4 being loaded into FIR filter, obtains compensated channel frequency response.
The practical frequency response of channel is as shown in Figure 4 before compensating.
Channel frequency response is as shown in Figure 5 after compensation.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also should belong to of the invention
Protection scope.
Claims (1)
1. a kind of Broad-band Modulated Signal frequency response precompensation method, it is characterised in that: use FPGA, carry out in accordance with the following steps:
Step 1: being tested by frequency scan pattern, obtain the frequency response with the actual channel of broadband signal similar frequency bands；
Step 2: the frequency response to the actual channel in step 1 carries out digital normalized；
Step 3: reciprocal being asked to the frequency response of the actual channel after the digital normalized in step 2, obtains compensation frequency response A
(f)；
Step 4: the new filtering factor after actual signal channel is repaid in supplement；
If the filtering factor of the FIR filter in FPGA is h (t), then its Fourier transformation is H (f), will be in H (f) and step 3
Compensation frequency response A (f) point by point be multiplied obtain combination frequency response HA (fN)=H (fN)×A(fN), wherein N=0,1 ... ... n, then
To N number of HA (fN) carry out inverse-Fourier transform obtain N number of target filtering factor ha (t), as compensation actual signal channel after
New filtering factor；
Step 5: new filtering factor obtained in step 4 being loaded into FIR filter, obtains compensated channel frequency response.
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| CN201811207034.2A CN109547036A (en) | 2018-10-17 | 2018-10-17 | A kind of Broad-band Modulated Signal frequency response precompensation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371722A (en) * | 2020-03-18 | 2020-07-03 | 南京创远信息科技有限公司 | Method for realizing predistortion compensation processing aiming at 5G NR in-band modulation signal |
| CN114024627A (en) * | 2021-11-23 | 2022-02-08 | 上海创远仪器技术股份有限公司 | Method, device, processor and storage medium for realizing rapid full-band frequency response compensation processing aiming at broadband modulation signal |
| CN117134783A (en) * | 2023-10-27 | 2023-11-28 | 高拓讯达(北京)微电子股份有限公司 | Pre-compensation method and device for transmitter signal, electronic equipment and storage medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986484A (en) * | 2014-05-15 | 2014-08-13 | 中国电子科技集团公司第四十一研究所 | Compensation method for unbalanced broadband intermediate frequency signal amplitudes |
-
2018
- 2018-10-17 CN CN201811207034.2A patent/CN109547036A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986484A (en) * | 2014-05-15 | 2014-08-13 | 中国电子科技集团公司第四十一研究所 | Compensation method for unbalanced broadband intermediate frequency signal amplitudes |
Non-Patent Citations (1)
| Title |
|---|
| 铁奎: "《一种基于FIR滤波器的频响补偿技术》", 《安徽电子信息职业技术学院学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371722A (en) * | 2020-03-18 | 2020-07-03 | 南京创远信息科技有限公司 | Method for realizing predistortion compensation processing aiming at 5G NR in-band modulation signal |
| CN114024627A (en) * | 2021-11-23 | 2022-02-08 | 上海创远仪器技术股份有限公司 | Method, device, processor and storage medium for realizing rapid full-band frequency response compensation processing aiming at broadband modulation signal |
| CN114024627B (en) * | 2021-11-23 | 2024-05-17 | 上海创远仪器技术股份有限公司 | Method, device, processor and storage medium for realizing fast full-band frequency response compensation processing for broadband modulation signal |
| CN117134783A (en) * | 2023-10-27 | 2023-11-28 | 高拓讯达(北京)微电子股份有限公司 | Pre-compensation method and device for transmitter signal, electronic equipment and storage medium |
| CN117134783B (en) * | 2023-10-27 | 2024-01-30 | 高拓讯达(北京)微电子股份有限公司 | Pre-compensation method and device for transmitter signal, electronic equipment and storage medium |
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Application publication date: 20190329 |