CN107689842A - A kind of method and device of calibration data - Google Patents
A kind of method and device of calibration data Download PDFInfo
- Publication number
- CN107689842A CN107689842A CN201610634444.XA CN201610634444A CN107689842A CN 107689842 A CN107689842 A CN 107689842A CN 201610634444 A CN201610634444 A CN 201610634444A CN 107689842 A CN107689842 A CN 107689842A
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- calibration data
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- cyclic prefix
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0079—Formats for control data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0091—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location arrangements specific to receivers, e.g. format detection
Abstract
The invention discloses a kind of method and device of calibration data.This method includes：Receive the calibration data for presetting the preset format on N number of passage；Cumulative mean is carried out to the calibration data on each passage, adjacent channel power ratio, signal to noise ratio and the root mean square of each passage are calculated according to the calibration data after cumulative mean, and whether within a preset range to judge adjacent channel power ratio, the signal to noise ratio and the root mean square respectively；The local broadband signal that the calibration data on N number of passage and calibration are sent is subjected to conjugate multiplication respectively, obtains N number of Delay；Cyclic shift compensation is carried out to the calibration data on N number of passage according to N number of Delay respectively；Calibration data after being compensated according to cyclic shift calculates polar coordinates, the polar coordinates are normalized to obtain the actual phase of calibration data, so as to carry out calibration process using the result after multi-frame accumulation, the reception calibration for open loop is realized, improves its antijamming capability.
Description
Technical field
The present embodiments relate to the technical field of communication, more particularly to a kind of method and device of calibration data.
Background technology
For time division duplex (Time Division Duplexing, TDD) system, due to uplink downlink use it is identical
Carrier frequency, in theory it is believed that ascending physical signal propagation channel and downlink physical propagation channel have reciprocity, this will be TDD system
Bring the advantage of performance boost.Using channel reciprocity, base station end can be obtained descending send by uplink receiving channel and be believed
The status information in road, and then realize that more accurate send pre-processes, and realizes and is sent towards the directionality for receiving customer location, is carried
Rise received signal quality.
But in physics realization, radio frequency (Radio Frequency, the RF) end of every antenna needs two sets of circuits to divide
Not Wan Cheng signal send and receive, due to the fabrication error of hardware aspect, plus amplifier nonlinearity distortion, be difficult to realize
Two sets of circuits of radio frequency have completely the same characteristic.In addition, the characteristic response of each radio circuit is also with component variations, work
Working frequency, the change of time and external environment condition (such as temperature, humidity) and change.So, from the influence to baseband signal
See, sendaisle and receiving channel are equally multiplied by different coefficients to channel, and the reciprocity that result in channel is damaged.
The content of the invention
The purpose of the embodiment of the present invention is to propose a kind of method and device of calibration data, it is intended to which how solution improves school
The problem of accurate degree of accuracy and efficiency.
To use following technical scheme up to this purpose, the embodiment of the present invention：
In a first aspect, a kind of method of calibration data, methods described include：
Receive the calibration data for presetting the preset format on N number of passage；
Cumulative mean is carried out to the calibration data on each passage, calculated according to the calibration data after cumulative mean each logical
Adjacent channel power ratio, signal to noise ratio and the root mean square in road, and judge respectively the adjacent channel power ratio, the signal to noise ratio with
And within a preset range whether the root mean square；
The local broadband signal that the calibration data on N number of passage and calibration are sent is subjected to conjugate multiplication respectively, obtained N number of
Delay；
Cyclic shift compensation is carried out to the calibration data on N number of passage according to N number of Delay respectively；
Calibration data after being compensated according to cyclic shift calculates polar coordinates, and the polar coordinates are normalized and calibrated
The actual phase of data.
Preferably, N number of passage is 8 passages, and the calibration data of the preset format is 16 Frame Alignment FA data, the N
Individual Delay is 8 Delays.
Preferably, before the calibration data for receiving 16 frame preset formats on default N number of passage, in addition to：Modification
Receive calibration frame structure.
Preferably, the modification receives calibration frame structure, including：
Increase the cyclic prefix of the preposition neighbouring business time-slot of the calibration data, before reducing middle and afterbody circulation
Sew.
Preferably, the circulating prefix-length of increase is identical with the length of the cyclic prefix of reduction.
Preferably, the cyclic prefix of the preposition neighbouring business time-slot of the increase calibration data, reduces middle and tail
The cyclic prefix in portion, including：
Preposition CP length is increased to 5, middle and afterbody CP length is respectively reduced 1.
Preferably, the amended reception calibration frame structure is 2us cyclic prefix, before 16us pilot signals, 2us circulation
Sew, 2us cyclic prefix, 16us valid data signals and 2us cyclic prefix.
Second aspect, a kind of device of calibration data, described device include：
Receiving module, for receiving the calibration data of the preset format on default N number of passage；
Cumulative mean module, for carrying out cumulative mean to the calibration data on each passage, after cumulative mean
Calibration data calculates adjacent channel power ratio, signal to noise ratio and the root mean square of each passage；
Judge module, for whether judging adjacent channel power ratio, the signal to noise ratio and the root mean square respectively
Within a preset range；
Conjugate module, for being respectively total to the local broadband signal that the calibration data on N number of passage and calibration are sent
Yoke is multiplied, and obtains N number of Delay；
Circular shift module, for being circulated respectively to the calibration data on N number of passage according to N number of Delay
Shift compensation；
Module is normalized, polar coordinates is calculated for the calibration data after being compensated according to cyclic shift, the polar coordinates is entered
Row normalization obtains the actual phase of calibration data.
Preferably, N number of passage is 8 passages, and the calibration data of the preset format is 16 Frame Alignment FA data, the N
Individual Delay is 8 Delays.
Preferably, described device also includes：
Modified module, for before the calibration data for presetting 16 frame preset formats on N number of passage is received, modification to receive
Calibrate frame structure.
Preferably, the modified module, is used for：
Increase the cyclic prefix of the preposition neighbouring business time-slot of the calibration data, before reducing middle and afterbody circulation
Sew.
Preferably, the circulating prefix-length of increase is identical with the length of the cyclic prefix of reduction.
Preferably, the modified module, is additionally operable to：
Preposition CP length is increased to 5, middle and afterbody CP length is respectively reduced 1.
Preferably, the amended reception calibration frame structure is 2us cyclic prefix, before 16us pilot signals, 2us circulation
Sew, 2us cyclic prefix, 16us valid data signals and 2us cyclic prefix.
The embodiment of the present invention discloses a kind of method and device of calibration data, receives the preset format preset on N number of passage
Calibration data；Cumulative mean is carried out to the calibration data on each passage, calculated according to the calibration data after cumulative mean every
Adjacent channel power ratio, signal to noise ratio and the root mean square of individual passage, and the adjacent channel power ratio, the noise are judged respectively
Than and the root mean square whether within a preset range；The calibration data on N number of passage and calibration are sent respectively local wide
Band signal carries out conjugate multiplication, obtains N number of Delay；According to N number of Delay respectively to the calibration number on N number of passage
According to progress cyclic shift compensation；Calibration data after being compensated according to cyclic shift calculates polar coordinates, and the polar coordinates are returned
One change obtains the actual phase of calibration data, so as to carry out calibration process using the result after multi-frame accumulation, realizes for open loop
Reception calibration, improve its antijamming capability.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of the method for calibration data provided in an embodiment of the present invention；
Fig. 2 is the schematic flow sheet of the method for another calibration data provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of the reception calibration frame structure before a kind of modification that prior art provides；
Fig. 4 is a kind of amended schematic diagram for receiving calibration frame structure provided in an embodiment of the present invention；
Fig. 5 is a kind of high-level schematic functional block diagram of the device of calibration data provided in an embodiment of the present invention.
Embodiment
The embodiment of the present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this
The specific embodiment of place description is used only for explaining the embodiment of the present invention, rather than the restriction to the embodiment of the present invention.In addition also
It should be noted that for the ease of describing, the part related to the embodiment of the present invention rather than entire infrastructure are illustrate only in accompanying drawing.
Reference picture 1, Fig. 1 are a kind of schematic flow sheet of the method for calibration data provided in an embodiment of the present invention.
As shown in figure 1, the method for the calibration data includes：
Step 101, the calibration data for presetting the preset format on N number of passage is received；
Wherein, N number of passage is 8 passages, and the calibration data of the preset format is 16 Frame Alignment FA data.Take into account system
Demand, the superposition gain of 16 frames can meet signal to noise ratio (Signal Noise Ratio, SNR) requirement, while can reduce
Power consumption, calibration do always if will power consumption, and may to other base stations formed disturb.
Step 102, cumulative mean is carried out to the calibration data on each passage, according to the calibration data meter after cumulative mean
Calculate the adjacent channel power ratio (Adiacent Channel Power Ratio, ACPR) of each passage, signal to noise ratio and square
Root (Root Mean Square, RMS), and the adjacent channel power ratio, the signal to noise ratio and described square are judged respectively
Within a preset range whether root；
Specifically, after index has calculated, according to theoretical value the index for comparing calculating can be gone whether reasonable：ACPR and SNR
Not less than 24dB；RMS is not less than -13dB.
Step 103, the local broadband signal that the calibration data on N number of passage and calibration are sent is subjected to conjugation phase respectively
Multiply, obtain N number of Delay；
Wherein, N number of Delay is 8 Delays.
Step 104, cyclic shift compensation is carried out to the calibration data on N number of passage according to N number of Delay respectively；
Specifically, calibration data has 256 available points altogether, left and right sidesing shifting is gone according to N number of delayed data, remains this
256 virtual values.Such as：Move to right [1 23 4]->[4 1 2 3]；Move to left [1 23 4]->[2 3 4 1].
Step 105, the calibration data after being compensated according to cyclic shift calculates polar coordinates, and the polar coordinates are normalized
Obtain the actual phase of calibration data.
Receiving calibration only needs 1 10ms just can complete, uses continuous 16*10ms to do now, in itself to precision just
Improve, while the accurate sequential calibrated transfers to RRU to go to control, the control to time point is just very accurate in itself by FPGA, is used than simple
DSP goes control time point much more accurate.
The embodiment of the present invention discloses a kind of method of calibration data, receives the calibration for presetting the preset format on N number of passage
Data；Cumulative mean is carried out to the calibration data on each passage, each passage is calculated according to the calibration data after cumulative mean
Adjacent channel power ratio, signal to noise ratio and root mean square, and judge respectively the adjacent channel power ratio, the signal to noise ratio and
Within a preset range whether the root mean square；The local broadband signal for respectively sending the calibration data on N number of passage and calibration
Conjugate multiplication is carried out, obtains N number of Delay；The calibration data on N number of passage is carried out respectively according to N number of Delay
Cyclic shift compensates；Calibration data after being compensated according to cyclic shift calculates polar coordinates, and the polar coordinates are normalized
To the actual phase of calibration data, so as to carry out calibration process using the result after multi-frame accumulation, the reception for open loop is realized
Calibration, improves its antijamming capability.
Reference picture 2, Fig. 2 are the schematic flow sheet of the method for another calibration data provided in an embodiment of the present invention.
As shown in Fig. 2 the method for the calibration data includes：
Step 201, modification receives calibration frame structure；
Preferably, increase the cyclic prefix of the preposition neighbouring business time-slot of the calibration data, reduce middle and afterbody
Cyclic prefix.
Preferably, the circulating prefix-length of increase is identical with the length of the cyclic prefix of reduction.
Preferably, the cyclic prefix of the preposition neighbouring business time-slot of the increase calibration data, reduces middle and tail
The cyclic prefix in portion, including：
The length of preposition cyclic prefix (Cyclic Prefix, CP) is increased to 5, middle and afterbody CP length is each
Reduce 1.
Wherein, as shown in figure 3, Fig. 3 is the schematic diagram of the reception calibration frame structure before a kind of modification that prior art provides.
Fig. 4 is a kind of amended schematic diagram for receiving calibration frame structure provided in an embodiment of the present invention.Second G (guard) of Fig. 3
Frame structure be modification before, Fig. 4 this be modification after.Due to receiving calibrating sequence and then uplink receiving, centre is only
The CP for having 2us is protected, and the uplink synchronous time of terminal and base station is 6us, when terminal uplink is out of tune, may result in terminal
Signal fall into reception calibration ordered sequence, it is abnormal to cause to receive calibration, has been carried out suitably so calibration frame structure will be received
Adjustment, preposition 2us CP protections are extended for 5us, middle and afterbody CP are respectively shortened into 1us accordingly, valid data are held
The continuous time is still 32us (removing CP).
It is described it is amended receive calibration frame structure be 2us cyclic prefix+16us (pilot signal)+2us cyclic prefix+
2us cyclic prefix+16us (valid data signal)+2us cyclic prefix.
Step 202, the calibration data for presetting the preset format on N number of passage is received；
Wherein, N number of passage is 8 passages, and the calibration data of the preset format is 16 Frame Alignment FA data.
Step 203, cumulative mean is carried out to the calibration data on each passage, according to the calibration data meter after cumulative mean
Adjacent channel power ratio, signal to noise ratio and the root mean square of each passage are calculated, and judges the adjacent channel power ratio, described respectively
Within a preset range whether signal to noise ratio and the root mean square；
Step 204, the local broadband signal that the calibration data on N number of passage and calibration are sent is subjected to conjugation phase respectively
Multiply, obtain N number of Delay；
Wherein, N number of Delay is 8 Delays.
Step 205, cyclic shift compensation is carried out to the calibration data on N number of passage according to N number of Delay respectively；
Step 206, the calibration data after being compensated according to cyclic shift calculates polar coordinates, and the polar coordinates are normalized
Obtain the actual phase of calibration data.
The embodiment of the present invention discloses a kind of method of calibration data, when terminal uplink is synchronously out of tune, signal has multipath or
When person's emission switch is without closing in time it is likely to that reception can be disturbed to calibrate, therefore calibration frame structure will be received and modified,
Reduce interference of the above situation to calibration；Original calibration program needs to take business time-slot, it is necessary to stop current business simultaneously, this
The calibration of scheme is realized in Guard, does not interfere with the transmitting and reception of regular traffic, so also can be with during business normal use
Shi Jinhang on-line calibrations, it is not necessary to stop current business.
Reference picture 5, Fig. 5 are a kind of high-level schematic functional block diagram of the device of calibration data provided in an embodiment of the present invention.
As shown in figure 5, the device of the calibration data includes：
Receiving module 501, for receiving the calibration data of the preset format on default N number of passage；
Cumulative mean module 502, for carrying out cumulative mean to the calibration data on each passage, after cumulative mean
Calibration data calculate adjacent channel power ratio, signal to noise ratio and the root mean square of each passage；
Judge module 503, for judging that adjacent channel power ratio, the signal to noise ratio and the root mean square is respectively
It is no within a preset range；
Conjugate module 504, for respectively carrying out the local broadband signal that the calibration data on N number of passage and calibration are sent
Conjugate multiplication, obtain N number of Delay；
Circular shift module 505, for being carried out respectively to the calibration data on N number of passage according to N number of Delay
Cyclic shift compensates；
Module 506 is normalized, polar coordinates are calculated for the calibration data after being compensated according to cyclic shift, to the polar coordinates
It is normalized to obtain the actual phase of calibration data.
Preferably, N number of passage is 8 passages, and the calibration data of the preset format is 16 Frame Alignment FA data, the N
Individual Delay is 8 Delays.
Preferably, described device also includes：
Modified module, for before the calibration data for presetting 16 frame preset formats on N number of passage is received, modification to receive
Calibrate frame structure.
Preferably, the modified module, is used for：
Increase the cyclic prefix of the preposition neighbouring business time-slot of the calibration data, before reducing middle and afterbody circulation
Sew.
Preferably, the circulating prefix-length of increase is identical with the length of the cyclic prefix of reduction.
Preferably, the modified module, is additionally operable to：
Preposition CP length is increased to 5, middle and afterbody CP length is respectively reduced 1.
Preferably, the amended calibration frame structure that receives is before 2us cyclic prefix+16us pilot signals+2us is circulated
Sew+2us cyclic prefix+16us valid data signal+2us cyclic prefix.
The embodiment of the present invention discloses a kind of device of calibration data, receives the calibration for presetting the preset format on N number of passage
Data；Cumulative mean is carried out to the calibration data on each passage, each passage is calculated according to the calibration data after cumulative mean
Adjacent channel power ratio, signal to noise ratio and root mean square, and judge respectively the adjacent channel power ratio, the signal to noise ratio and
Within a preset range whether the root mean square；The local broadband signal for respectively sending the calibration data on N number of passage and calibration
Conjugate multiplication is carried out, obtains N number of Delay；The calibration data on N number of passage is carried out respectively according to N number of Delay
Cyclic shift compensates；Calibration data after being compensated according to cyclic shift calculates polar coordinates, and the polar coordinates are normalized
To the actual phase of calibration data, so as to carry out calibration process using the result after multi-frame accumulation, the reception for open loop is realized
Calibration, improves its antijamming capability.
The technical principle of the embodiment of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain this
The principle of inventive embodiments, and the limitation to protection domain of the embodiment of the present invention can not be construed in any way.Based on herein
Explanation, those skilled in the art, which would not require any inventive effort, can associate the other specific of the embodiment of the present invention
Embodiment, these modes are fallen within the protection domain of the embodiment of the present invention.
Claims (14)
- A kind of 1. method of calibration data, it is characterised in that methods described includes：Receive the calibration data for presetting the preset format on N number of passage；Cumulative mean is carried out to the calibration data on each passage, each passage is calculated according to the calibration data after cumulative mean Adjacent channel power ratio, signal to noise ratio and root mean square, and adjacent channel power ratio, the signal to noise ratio and the institute are judged respectively Whether within a preset range to state root mean square；The local broadband signal that the calibration data on N number of passage and calibration are sent is subjected to conjugate multiplication respectively, obtains N number of time delay Information；Cyclic shift compensation is carried out to the calibration data on N number of passage according to N number of Delay respectively；Calibration data after being compensated according to cyclic shift calculates polar coordinates, and the polar coordinates are normalized to obtain calibration data Actual phase.
- 2. according to the method for claim 1, it is characterised in that N number of passage is 8 passages, the school of the preset format Quasi- data are 16 Frame Alignment FA data, and N number of Delay is 8 Delays.
- 3. according to the method for claim 1, it is characterised in that described to receive the 16 frame preset formats preset on N number of passage Calibration data before, in addition to：Modification receives calibration frame structure.
- 4. according to the method for claim 3, it is characterised in that the modification receives calibration frame structure, including：Increase the cyclic prefix of the preposition neighbouring business time-slot of the calibration data, reduce middle and afterbody cyclic prefix.
- 5. according to the method for claim 4, it is characterised in that the circulating prefix-length of increase and the cyclic prefix of reduction Length is identical.
- 6. according to the method for claim 4, it is characterised in that during the preposition neighbouring business of the increase calibration data The cyclic prefix of gap, middle and afterbody cyclic prefix is reduced, including：Preposition CP length is increased to 5, middle and afterbody CP length is respectively reduced 1.
- 7. according to the method for claim 3, it is characterised in that the amended calibration frame structure that receives circulates for 2us Prefix, 16us pilot signals, 2us cyclic prefix, 2us cyclic prefix, 16us valid data signals and 2us cyclic prefix.
- 8. a kind of device of calibration data, it is characterised in that described device includes：Receiving module, for receiving the calibration data of the preset format on default N number of passage；Cumulative mean module, for carrying out cumulative mean to the calibration data on each passage, according to the calibration after cumulative mean Data calculate adjacent channel power ratio, signal to noise ratio and the root mean square of each passage；Judge module, for judging adjacent channel power ratio, the signal to noise ratio and the root mean square whether pre- respectively If in scope；Conjugate module, for the local broadband signal that the calibration data on N number of passage and calibration are sent to be carried out into conjugation phase respectively Multiply, obtain N number of Delay；Circular shift module, for carrying out cyclic shift to the calibration data on N number of passage respectively according to N number of Delay Compensation；Module is normalized, polar coordinates is calculated for the calibration data after being compensated according to cyclic shift, the polar coordinates is returned One change obtains the actual phase of calibration data.
- 9. device according to claim 8, it is characterised in that N number of passage is 8 passages, the school of the preset format Quasi- data are 16 Frame Alignment FA data, and N number of Delay is 8 Delays.
- 10. device according to claim 8, it is characterised in that described device also includes：Modified module, for before the calibration data for presetting 16 frame preset formats on N number of passage is received, modification to receive calibration Frame structure.
- 11. device according to claim 10, it is characterised in that the modified module, be used for：Increase the cyclic prefix of the preposition neighbouring business time-slot of the calibration data, reduce middle and afterbody cyclic prefix.
- 12. device according to claim 11, it is characterised in that the circulating prefix-length of increase and the cyclic prefix of reduction Length it is identical.
- 13. device according to claim 11, it is characterised in that the modified module, be additionally operable to：Preposition CP length is increased to 5, middle and afterbody CP length is respectively reduced 1.
- 14. device according to claim 10, it is characterised in that the amended calibration frame structure that receives follows for 2us Ring prefix, 16us pilot signals, 2us cyclic prefix, 2us cyclic prefix, 16us valid data signals and 2us cyclic prefix.
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| CN201610634444.XA CN107689842A (en) | 2016-08-05 | 2016-08-05 | A kind of method and device of calibration data |
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| WO2020078291A1 (en) * | 2018-10-19 | 2020-04-23 | 大唐移动通信设备有限公司 | Method and device for improving phase measurement accuracy |
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Application publication date: 20180213 |