CN110460552A - A kind of inter-channel phase difference measurements and calibration method - Google Patents
A kind of inter-channel phase difference measurements and calibration method Download PDFInfo
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- CN110460552A CN110460552A CN201910604113.5A CN201910604113A CN110460552A CN 110460552 A CN110460552 A CN 110460552A CN 201910604113 A CN201910604113 A CN 201910604113A CN 110460552 A CN110460552 A CN 110460552A
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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
- H04B1/69—Spread spectrum techniques
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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
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Abstract
The invention discloses a kind of inter-channel phase difference measurements and calibration methods, including receiving channel phase difference measurement and calibration, transmission channel phase difference measurement and calibration: multiple receiving channels will be sent to by simple signal all the way, then cross correlation process is carried out to reception inter-channel phase difference, measurement obtain phase difference between receiving channel, finally to normally receive data carry out phase difference compensation calibrated after reception data；A receiving channel will be sent to after the combining of the road N spread-spectrum signal, signal after being de-spread again to the road N wherein included spread-spectrum signal, then cross correlation process is carried out to reception inter-channel phase difference, measurement obtains phase difference between transmission channel, finally carries out the transmitting data after phase difference compensation is calibrated to normal transmission data.The technical program can float to interchannel circuit trace difference, interchannel local oscillator phase difference, device aging easily etc. to receive caused by factors calibrates with the phase difference of transmission channel, improves the performance of Wave beam forming and null formation.
Description
Technical field
The present invention relates to array signal processing field, it is specifically related to a kind of inter-channel phase difference measurements and calibration method,
Containing transmission channel and receiving channel.
Background technique
In array signal processing field, either Wave beam forming or null is formed, more quick to inter-channel phase difference
Sense.And in actual circuit, inevitably there is inter-channel phase difference.First is that there is some difference for circuit trace, second is that transmitting-receiving
There is also interchannel local oscillator differences for device chip itself, third is that device aging etc. can also cause additionally with the lengthening of working time
Deviation.In consideration of it, needing to measure inter-channel phase difference and calibrate.
Summary of the invention
To solve the above-mentioned problems, the object of the present invention is to provide a kind of inter-channel phase difference measurements and calibration methods.
The technical solution adopted by the present invention is that:
A kind of inter-channel phase difference measurements and calibration method, including receiving channel phase difference measurement and calibration, transmission channel
Phase difference measurement and calibration, receiving channel phase difference measurement and calibration the following steps are included:
A1, simple signal x (t) is generated；
A2, pass through a transmission channel, be sent to M different receiving channels, obtain yi(t), wherein i=1 ... ..., M；
A3, cross correlation process is carried out to reception inter-channel phase difference, measurement obtains phase difference between receiving channel；
A4, to normally receive data r (t) carry out phase difference compensation calibrated after reception data；
Transmission channel phase difference measurement and calibration the following steps are included:
B1, the road N spread-spectrum signal p is generatedk(t), it is sent to the same receiving channel after emitted channel combining, obtains receiving letter
Number z (t)；
B2, the road the N spread-spectrum signal for including in z (t) is de-spread respectively, the signal z after being de-spreadk(t)；
B3, cross correlation process is carried out to signal after the despreading of the road N, measurement obtains phase difference between transmission channel；
B4, the transmitting data after phase difference compensation is calibrated are carried out to normal transmission data u (t).
Further, the calculation formula of cross correlation process is in the step A3Wherein i=
1,……,M。
Further, simple signal is closed after measuring in the step A3, is generated to avoid to normal received signal
It influences.
Further, the calculation formula of phase difference compensation is in the step A4 Wherein i
=1 ..., M.
Further, the calculation formula of cross correlation process is in the step B3Wherein k
=1 ..., N.
Further, spread-spectrum signal is closed after measuring in the step B3, is generated to avoid to normal received signal
It influences.
Further, the calculation formula of phase difference compensation is in the step B4 Its
Middle k=1 ..., N.
The beneficial effects of the present invention are:
The technical program will be sent to M receiving channel by simple signal all the way, then mutual to inter-channel phase difference progress is received
Relevant treatment is finally calibrated to normally receiving data and carry out phase difference compensation to measure phase difference between receiving channel
Reception data afterwards；A receiving channel will be sent to after the combining of the road N spread-spectrum signal, then to the road N wherein included spread-spectrum signal into
The signal gone after being de-spread, then carries out cross correlation process to the road N signal and first via signal, and measurement obtains transmitting and leads to
Phase difference between road finally carries out the transmitting data after phase difference compensation is calibrated to normal transmission data.
The technical program can float to interchannel circuit trace difference, interchannel local oscillator phase difference, device aging Yi Dengyin
It receives caused by plain and is calibrated with the phase difference of transmission channel, improve the performance of Wave beam forming and null formation.
Detailed description of the invention
Fig. 1 is the flow chart of inter-channel phase difference measurements and calibration method in embodiment；
Fig. 2 is the schematic diagram of receiving channel phase difference measurement and calibration process in embodiment；
Fig. 3 is the schematic diagram of transmission channel phase difference measurement and calibration process in embodiment.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained.
It is as shown in Figure 1 a kind of inter-channel phase difference measurements of the invention and calibration method, including receiving channel phase difference
Measurement and calibration and transmission channel phase difference measurement and two parts of calibration.
As shown in Fig. 2, receiving channel phase difference measurement and calibration the following steps are included:
A1, simple signal x (t) is generated；
A2, pass through a transmission channel, multichannel is divided by power splitter and is sent to M different receiving channels, obtains yi
(t), wherein i=1 ... ..., M；
A3, cross correlation process is carried out to reception inter-channel phase difference, obtains phase difference between receiving channel, cross-correlation calculation is public
Formula isWherein i=1 ... ..., M close simple signal after measurement, to avoid to normally connecing
The collection of letters number has an impact；
A4, the reception data after phase difference compensation is calibrated are carried out to normally receiving data r (t), then carries out subsequent place
Reason, the calculation formula of phase difference compensation areWherein i=1 ..., M.
As shown in figure 3, transmission channel phase difference measurement and calibration the following steps are included:
B1, the road N spread-spectrum signal p is generatedk(t), spreading code is different, is sent to combiner combining through the road N transmission channel, so
After be sent to a receiving channel, obtain receive signal z (t)；
B2, the road the N spread-spectrum signal for including in z (t) is de-spread respectively, the signal z after being de-spreadk(t)；
Signal carries out cross correlation process, measurement to signal after the despreading of the road N at same frequency single carrier after B3, each road despreading of tracking
Phase difference between transmission channel is obtained, calculation formula isWherein k=1 ... ..., N, after measurement
Spread-spectrum signal is closed, is had an impact to avoid to normal received signal；
B4, the transmitting data after phase difference compensation is calibrated are carried out to normal transmission data u (t), then emitted, phase
The calculation formula of displacement error compensation isWherein k=1 ..., N.
In conclusion the technical program will be sent to M receiving channel by simple signal all the way, to receive inter-channel phase difference into
Row cross correlation process, measurement obtain phase difference between receiving channel, finally to normally receive data carry out phase difference compensation obtain school
Reception data after standard；It will be sent to a receiving channel after the combining of the road N spread-spectrum signal, then to the road N wherein included spread-spectrum signal
Signal after being de-spread, then carries out cross correlation process to the road N signal and first via signal, and measurement is emitted
Inter-channel phase difference finally carries out the transmitting data after phase difference compensation is calibrated to normal transmission data.
The technical program can float to interchannel circuit trace difference, interchannel local oscillator phase difference, device aging Yi Dengyin
It receives caused by plain and is calibrated with the phase difference of transmission channel, improve the performance of Wave beam forming and null formation.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include
In scope of patent protection of the invention.
Claims (7)
1. a kind of inter-channel phase difference measurements and calibration method, which is characterized in that including receiving channel phase difference measurement and calibration
With transmission channel phase difference measurement and calibration, receiving channel phase difference measurement and calibration the following steps are included:
A1, simple signal x (t) is generated；
A2, pass through a transmission channel, be sent to M different receiving channels, obtain yi(t), wherein i=1 ... ..., M；
A3, cross correlation process is carried out to reception inter-channel phase difference, measurement obtains phase difference between receiving channel；
A4, to normally receive data r (t) carry out phase difference compensation calibrated after reception data；
Transmission channel phase difference measurement and calibration the following steps are included:
B1, the road N spread-spectrum signal p is generatedk(t), it is sent to the same receiving channel after emitted channel combining, obtains receiving signal z
(t)；
B2, the road the N spread-spectrum signal for including in z (t) is de-spread respectively, the signal z after being de-spreadk(t)；
B3, cross correlation process is carried out to signal after the despreading of the road N, measurement obtains phase difference between transmission channel；
B4, the transmitting data after phase difference compensation is calibrated are carried out to normal transmission data u (t).
2. inter-channel phase difference measurements according to claim 1 and calibration method, it is characterised in that: in the step A3 mutually
The calculation formula of relevant treatment isWherein i=1,2 ..., M.
3. inter-channel phase difference measurements according to claim 1 and calibration method, it is characterised in that: surveyed in the step A3
Simple signal is closed after amount, is had an impact to avoid to normal received signal.
4. inter-channel phase difference measurements according to claim 1 and calibration method, it is characterised in that: phase in the step A4
The calculation formula of displacement error compensation isWherein i=1,2 ..., M.
5. inter-channel phase difference measurements according to claim 1 and calibration method, it is characterised in that:, in the step B3
The calculation formula of cross correlation process isWherein k=1 ..., N.
6. inter-channel phase difference measurements according to claim 1 and calibration method, it is characterised in that: surveyed in the step B3
Spread-spectrum signal is closed after amount, is had an impact to avoid to normal received signal.
7. inter-channel phase difference measurements according to claim 1 and calibration method, it is characterised in that: phase in the step B4
The calculation formula of displacement error compensation isWherein k=1 ..., N.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448774A (en) * | 2020-10-23 | 2021-03-05 | 中国电子科技集团公司第二十九研究所 | Self-checking method of broadband radio frequency receiving and processing system based on external radiation signal |
| CN112615680A (en) * | 2020-12-10 | 2021-04-06 | 上海移远通信技术股份有限公司 | Phase calibration method and device of transmitting channel and network equipment |
| WO2022267853A1 (en) * | 2021-06-22 | 2022-12-29 | 华为技术有限公司 | Channel phase correction method and related apparatus |
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| CN112448774A (en) * | 2020-10-23 | 2021-03-05 | 中国电子科技集团公司第二十九研究所 | Self-checking method of broadband radio frequency receiving and processing system based on external radiation signal |
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| WO2022267853A1 (en) * | 2021-06-22 | 2022-12-29 | 华为技术有限公司 | Channel phase correction method and related apparatus |
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Application publication date: 20191115 |