CN106209265B - A kind of the band wave calibration method and device of broadband signal - Google Patents
A kind of the band wave calibration method and device of broadband signal Download PDFInfo
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- CN106209265B CN106209265B CN201610463834.5A CN201610463834A CN106209265B CN 106209265 B CN106209265 B CN 106209265B CN 201610463834 A CN201610463834 A CN 201610463834A CN 106209265 B CN106209265 B CN 106209265B
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- signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
-
- 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
- H04B1/0042—Digital filtering
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
- H04B17/401—Monitoring; Testing of relay systems with selective localization
- H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
- H04B17/404—Monitoring; Testing of relay systems with selective localization using different frequencies selected by local filters
Abstract
The invention discloses the band wave calibration methods and device of a kind of broadband signal, DUC modules are given the method includes baseband signal, and the spreading rate of signal is promoted to input N times of spreading rate, it is sent into up-converter module, it inputs 1/N times that the frequency of local oscillator NCO modules is signal spreading rate, converted signals frequency is the 1/N of signal spreading rate, it is sent into down conversion module after FIR filter, the frequency of signal is restored, the value of N is more than or equal to 2.Initial phase, FIR filter is all-pass filter and is 0 with wave, signal source is according to setting step frequency adjustment, distal end is observed by frequency spectrograph, and the signal amplitude pad value input CPU processing units under each frequency of record are calculated penalty coefficient, are allocated to FIR filter, it realizes and the band wave of broadband signal is calibrated, broadband signal band wave can be made to be calibrated within 1dB, mitigate the debugging work load of radio-frequency front-end significantly, reduce development cycle and the cost of equipment.
Description
Technical field
The present invention relates to Repeater Technology field more particularly to the band wave calibration methods and device of a kind of broadband signal.
Background technology
With the development of wireless communication, the bandwidth of signal of communication is increasing, and repeater covers as mobile communication signal
The important component of system, radio frequency bandwidth is increasing, causes the difficulty that equipment belt wave debugs end in radio frequency to increase, it is difficult to reach
To the requirement of professional standard, especially in the repeaters 50M LTE, causes the unreasonable rate of equipment to increase, be unfavorable for equipment
Manufacture and popularization.
Invention content
In order to which whole radio frequency band wave has larger surplus, the present invention to propose a kind of broadband signal in equipment production process
Band wave calibration method and device, can by broadband signal band wave be calibrated in 1dB, reach Industry code requirements, with reduce penetrate
The difficulty of frequency debug time length, shortens the development cycle of equipment, reduces development cost.
The technical solution adopted by the present invention is as follows：
A kind of band wave calibration method of broadband signal, realizes that the device of this method includes：DUC modules, up-converter module,
FIR filter, down conversion module, CPU processing units, NCO modules.
Step S1, the tone signal that signal source is sent out first enters the near-end machine of repeater, and near-end machine passes through after receiving signal
Cross the present apparatus that optical fiber is transferred to distal end.Baseband signal enters the DUC modules of the present apparatus, and baseband signal is interpolated into input chip
N times of rate is sent into up-converter module；
Step S2, up-converter module will be believed by being mixed for the NCO modules of 1/N times of signal spreading rate with frequency
Number frequency become 1/N times of signal spreading rate, be sent into FIR filter；
Step S3, FIR filter compensates filtering, and down conversion module is sent into after FIR filter；
Step S4, the described down conversion module moves the frequency of signal to original from 1/N times of position of signal spreading rate
The reduction of signal frequency is realized in position.After be sent into D/A module, reach radio frequency link；
Wherein, the value of the N is more than or equal to 2.
Calibration process is as follows：
Step S5, the initialization of CPU processing units configures the filter factor of FIR filter to all-pass filter first, and
The band wave of FIR filter is 0；Near end signal source adjusts frequency with the step frequency set, distally by passing through after radio frequency link
Frequency spectrograph measures, and records the signal amplitude decaying under each frequency, the whole passband fluctuation situation of equipment is obtained, by setting for acquisition
The data of standby passband fluctuation give CPU processing units；
Step S6, the described CPU processing units calculate the penalty coefficient of FIR filter according to equipment belt wave number evidence, configuration
To FIR filter, the band wave calibration of broadband signal is realized.
The step frequency that the near end signal source is set is 1MHz or less.
It is further preferred that the step frequency that the near end signal source is set is 500KHz.
A kind of device with wave calibration method using a kind of broadband signal described above, including DUC modules, up-conversion
Module, FIR filter module, down conversion module, CPU processing units, NCO modules；
Wherein, the DUC modules, up-converter module, FIR filter module, down conversion module are sequentially connected, the NCO
Module is connect with the up-converter module, down conversion module respectively, and the CPU processing units are connect with FIR filter module；Institute
It states DUC modules and is used for and follow-up rf chain for receiving the baseband signal that repeater proximal end transmits, the down conversion module
Road connects.
Advantageous effect：
The band wave calibration method and device of a kind of broadband signal of the present invention can be calibrated to broadband signal band wave
In 1dB, reach Industry code requirements, to reduce the difficulty of radio frequency debug time length, shortens the development cycle of equipment, reduce
Development cost.
Description of the drawings
Fig. 1 is a kind of flow chart with wave calibration method of broadband signal of the present invention.
Fig. 2 is a kind of structure diagram with wave calibrating installation of broadband signal of the present invention.
Explanation of nouns：
DUC modules-Digital Up Convert module；NCO-digital controlled oscillator.
Specific implementation mode
Technical solution of the present invention is described in detail with reference to the accompanying drawings and examples.
Embodiment 1：
Fig. 1 is a kind of flow chart with wave calibration method of broadband signal of the present invention.As shown in Figure 1, the invention discloses
A kind of band wave calibration method of broadband signal, including at DUC modules, up-converter module, FIR filter, down conversion module, CPU
Manage unit, NCO modules.
The baseband signal of reception is transferred to distal end by optical fiber and gives DUC modules, DUC by the proximal end of S1, first repeater
Module carries out filtering interpolation to signal, realizes the promotion of signal spreading rate, and spreading rate is promoted the N to input spreading rate
Times, it is sent into up-converter module；
S2, the up-converter module and frequency are that the NCO modules of 1/N times of signal spreading rate are mixed, and are believed after frequency conversion
Number frequency be 1/N times of signal spreading rate, feeding FIR filter；
It should be noted that the signal spreading rate described in the present embodiment refers to the signal from DUC module output signals
Spreading rate.
S3, the FIR filter compensate filtering, and down conversion module is sent into after FIR filter；
S4, the down conversion module move the frequency of signal to origin-location from 1/N times of position of signal spreading rate,
Realize the reduction of signal frequency.After be sent into D/A module, reach radio frequency link；
Wherein, the value of the N is more than or equal to 2.
Calibration process is as follows：
S5, first, when initialization, CPU processing units configure the filter factor of FIR filter to all-pass filter, and
And the band wave of FIR filter is 0；Near end signal source adjusts frequency with the step frequency set, distally by leading to after radio frequency link
It crosses frequency spectrograph measurement to be observed, records the signal amplitude decaying under each frequency, obtain the whole passband fluctuation situation of equipment,
Give the data of the equipment passband fluctuation of acquisition to CPU processing units；
S6, the CPU processing units calculate the penalty coefficient of FIR filter, are allocated to according to equipment belt wave number evidence
FIR filter realizes the band wave calibration of broadband signal.
Usually, the step frequency that the near end signal source is set is 1MHz or less.In this embodiment, it is preferred that institute
Step frequency that near end signal source is set is stated as 500KHz.
In conclusion a kind of band wave calibration method of broadband signal of the present invention, may be implemented the band of broadband signal
Wave is calibrated, and broadband signal band wave can be calibrated in 1dB, reach Industry code requirements, to reduce radio frequency debug time length
Difficulty shortens the development cycle of equipment, reduces development cost.
Embodiment 2：
The device of the invention embodiment 2 belongs to same technical concept with embodiment of the method 1, not detailed in device embodiment
The content of description, refers to embodiment of the method.
Fig. 2 is a kind of structure diagram with wave calibrating installation of broadband signal of the present invention.As shown in Fig. 2, of the present invention
A kind of device with wave calibration method using a kind of broadband signal described above, including DUC modules, up-converter module,
FIR filter module, down conversion module, CPU processing units, NCO modules；
Wherein, the DUC modules, up-converter module, FIR filter module, down conversion module are sequentially connected, the NCO
Module is connect with the up-converter module, down conversion module respectively, and the CPU processing units are connect with FIR filter module；Institute
It states DUC modules and is used for and follow-up rf chain for receiving the baseband signal that repeater proximal end transmits, the down conversion module
Road connects.
By the present apparatus, the band wave calibration of broadband signal may be implemented, broadband signal band wave can be made to be calibrated within 1dB,
Reach Industry code requirements, mitigates the debugging work load of radio-frequency front-end significantly, while the fpga logic resource consumed is also less, contracting
The short development cycle of equipment, reduce development cost.In the repeaters LTE of 50M bandwidth, the present apparatus is placed on repeater
Distally, the band wave of broadband signal can be calibrated within 1dB, reaches Industry code requirements, reduce radio frequency debug time length
Difficulty reduces development cycle and the cost of equipment.
Embodiment described above and application scenarios are only presently preferred embodiments of the present invention and application scenarios, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement and its at other
The application of field and scene, should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of band wave calibration method of broadband signal, it is characterised in that：Realize that the device of this method includes DUC modules, upper change
Frequency module, FIR filter, down conversion module, CPU processing units, NCO modules；
Step S1, DUC modules are given in the proximal end of repeater by the base band signal transmission of reception to distal end, and the DUC modules are by base
The spreading rate of band signal is interpolated into N times of input spreading rate, is then fed into up-converter module；
Step S2, the described up-converter module is mixed with the NCO modules that frequency is 1/N times of signal spreading rate, is believed after frequency conversion
Number frequency be 1/N times of signal spreading rate；
Step S3, the data after mixing are sent into FIR filter and compensate filtering, are then passed to down conversion module；
Step S4, the described down conversion module moves the frequency of signal to origin-location from 1/N times of position of signal spreading rate,
Realize that baseband signal is sent into subsequent radio frequency link by the frequency reduction of baseband signal, the down conversion module；
Step S5, in initial phase, CPU processing units configure the filter factor of FIR filter to an all-pass filter,
And the band wave of FIR filter is 0；Near end signal source adjusts frequency with the step frequency that sets, distally by radio frequency link after
It is observed by frequency spectrograph, records the signal amplitude decaying under each frequency, obtain the whole passband fluctuation situation of equipment, and
The data of the equipment passband fluctuation of acquisition are inputted into CPU processing units；
Step S6, the described CPU processing units calculate the penalty coefficient of FIR filter according to data are fluctuated in equipment belt, configuration
To FIR filter, the calibration to broadband signal is realized；
Wherein, the value of the N is more than or equal to 2.
2. a kind of band wave calibration method of broadband signal according to claim 1, which is characterized in that the near end signal source
The step frequency set is 1MHz or less.
3. a kind of band wave calibration method of broadband signal according to claim 2, which is characterized in that the near end signal source
The step frequency set is 500KHz.
4. a kind of device with wave calibration method using a kind of broadband signal of claims 1 to 3 any one of them, feature
It is, including DUC modules, up-converter module, FIR filter module, down conversion module, CPU processing units, NCO modules；
Wherein, the DUC modules, up-converter module, FIR filter module, down conversion module are sequentially connected, the NCO modules
It is connect respectively with the up-converter module, down conversion module, the CPU processing units are connect with FIR filter module；It is described
DUC modules are used for and follow-up radio frequency link for receiving the baseband signal that repeater proximal end transmits, the down conversion module
Connection.
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| CN201610463834.5A CN106209265B (en) | 2016-06-24 | 2016-06-24 | A kind of the band wave calibration method and device of broadband signal |
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| CN201610463834.5A CN106209265B (en) | 2016-06-24 | 2016-06-24 | A kind of the band wave calibration method and device of broadband signal |
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| CN106209265A CN106209265A (en) | 2016-12-07 |
| CN106209265B true CN106209265B (en) | 2018-10-12 |
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Citations (5)
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|---|---|---|---|---|
| CN101997592A (en) * | 2010-11-03 | 2011-03-30 | 三维通信股份有限公司 | In-band wave motion compensation digital repeater and compensation method |
| CN102035503A (en) * | 2010-11-19 | 2011-04-27 | 钜泉光电科技(上海)股份有限公司 | Filtering device and filtering method of cascaded integral comb filter |
| CN102064889A (en) * | 2010-11-03 | 2011-05-18 | 三维通信股份有限公司 | Digital frequency-selecting repeater for in-band fluctuation compensation and compensation method |
| CN102904628A (en) * | 2012-10-11 | 2013-01-30 | 三维通信股份有限公司 | Consistency compensation method for gains of digital frequency-selecting repeater |
| US20150349900A1 (en) * | 2014-05-29 | 2015-12-03 | Realtek Semiconductor Corp. | Wideband calibration method and wideband calibration apparatus for calibrating mismatch between first signal path and second signal path of transmitter/receiver |
-
2016
- 2016-06-24 CN CN201610463834.5A patent/CN106209265B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997592A (en) * | 2010-11-03 | 2011-03-30 | 三维通信股份有限公司 | In-band wave motion compensation digital repeater and compensation method |
| CN102064889A (en) * | 2010-11-03 | 2011-05-18 | 三维通信股份有限公司 | Digital frequency-selecting repeater for in-band fluctuation compensation and compensation method |
| CN102035503A (en) * | 2010-11-19 | 2011-04-27 | 钜泉光电科技(上海)股份有限公司 | Filtering device and filtering method of cascaded integral comb filter |
| CN102904628A (en) * | 2012-10-11 | 2013-01-30 | 三维通信股份有限公司 | Consistency compensation method for gains of digital frequency-selecting repeater |
| US20150349900A1 (en) * | 2014-05-29 | 2015-12-03 | Realtek Semiconductor Corp. | Wideband calibration method and wideband calibration apparatus for calibrating mismatch between first signal path and second signal path of transmitter/receiver |
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| CN106209265A (en) | 2016-12-07 |
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Address after: 430205 Hubei city of Wuhan province Jiangxia Hidden Dragon Island Tan lake two Road No. 1 Patentee after: CITIC Mobile Communication Technology Co., Ltd Address before: 430073 Hubei city of Wuhan province Jiangxia Hidden Dragon Island Tan lake two Road No. 1 Patentee before: Wuhan Hongxin Telecommunication Technologies Co.,Ltd. |
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Address after: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee after: CITIC Mobile Communication Technology Co.,Ltd. Address before: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee before: CITIC Mobile Communication Technology Co., Ltd |
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