CN103986531A - Axis alignment adjustment method and system for orbital angular momentum wireless communication system - Google Patents
Axis alignment adjustment method and system for orbital angular momentum wireless communication system Download PDFInfo
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- CN103986531A CN103986531A CN201410175771.4A CN201410175771A CN103986531A CN 103986531 A CN103986531 A CN 103986531A CN 201410175771 A CN201410175771 A CN 201410175771A CN 103986531 A CN103986531 A CN 103986531A
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Abstract
The invention relates to an axis alignment adjustment method and system for an orbital angular momentum wireless communication system. The axis alignment adjustment method for the orbital angular momentum wireless communication system comprises the steps that S1, a receiving end recognizes the mode of a training signal after receiving the training signal sent by the sending end; S2, if the mode of the training signal is consistent with a set mode, an alignment confirmation signal is sent to the sending end; S3, if the mode of the training signal is not consistent with the set mode, axis alignment adjustment is conducted on the receiving end, and an alignment confirmation signal is sent to the sending end after adjustment is completed. According to the axis alignment adjustment method and system for the orbital angular momentum wireless communication system, due to the fact that the process of retransmission confirmation achieved through the training signal and the automatic axis alignment adjustment method are adopted, the influence of axis misalignment on detection is avoided during orbital angular momentum wireless communication, and the reliability of end-to-end communication is guaranteed.
Description
Technical field
The present invention relates to wireless communication system, the axle that especially relates to a kind of orbital angular momentum radio communication is aimed at control method and system thereof.
Background technology
At present, along with popularizing of mobile phone terminal, existing dense coding and Channel Sharing technology can not effectively have been avoided the congested of available wireless electric wave frequency range, and this has caused very big inconvenience to use of user.Therefore, develop new technology and effectively utilize frequency spectrum, heighten the rate of information throughput and seem most important.
A kind of way is to utilize electromagnetic field orbital angular momentum---this is not up to now also for the essential physical attribute of radio communication.Electromagnetic field not only has energy and also has angular momentum, and according to quantum-mechanical viewpoint, angular momentum can be decomposed into two parts: spin angular momentaum (SAM) and orbital angular momentum (OAM).Wherein, spin angular momentaum is relevant with polarization of electromagnetic wave, has therefore characterized the helicity of photon, orbital angular momentum with electromagnetic wave the helical phase section on vertical transmission direction of principal axis relevant.Orbital angular momentum is a basic physical quantity, has infinite multiple intrinsic state, and it provides another degree of freedom that is different from spin angular momentaum.Because orbital angular momentum state is orthogonal, thereby do not increasing under the prerequisite of spectrum width, orbital angular momentum state can be used as orthogonal communication channel, and the communication protocol sth. made by twisting that infinite multichannel is traditional is combined together.In theory, can be by 10 (or 100 or 1000 ...) road WiFi or LTE signal transmit, thereby throughput of system is increased to 10 (or 100 or 1000) doubly on single Shu Bo.This provides a solution full of hope for the serious radio communication in short supply of frequency spectrum resource.Thereby orbital angular momentum can be used as another the useful degree of freedom that is different from time domain, spatial domain, frequency domain, code territory, thereby greatly promote the capacity of communication system.
The prerequisite that realizes orbital angular momentum communication is arbitrary pattern that receiving terminal can accurately be identified orbital angular momentum.The method of detection track angular momentum can be divided into two classes at present, and a class is phase gradient method, and this method utilizes the phase difference of coplanar two electromagnetic fields that antenna is surveyed to estimate the mode value of orbital angular momentum.Another kind of is to obtain the power spectrum about different orbital angular momentum patterns by the complete information of measurement electromagnetic field.But, be different from traditional mobile communication, the detection of orbital angular momentum pattern all requires sniffer accurately to aim at emitter axle, otherwise, small departing from can bring even mistake of error to measurement, and this can have a strong impact on the performance of orbital angular momentum wireless communication system.Therefore, axle alignment issues has conclusive effect in orbital angular momentum communication.
Summary of the invention
The invention provides a kind of axle that is applicable to orbital angular momentum radio communication and aim at self-adaptation control method and system thereof, use training signal to retransmit the flow process of confirmation and the method that regulating shaft is aimed at automatically, solve orbital angular momentum radio communication axis misalignment to the impact of surveying, ensured the reliability of end-to-end communication.
According to above-mentioned purpose, the axle that the invention provides a kind of orbital angular momentum wireless communication system is aimed at control method, and described method comprises: S1, and receiving terminal, receiving after the training signal of transmitting terminal transmission, is identified the pattern of described training signal; S2, if consistent with the pattern of setting, send and confirms registration signal to described transmitting terminal; S3, if fruit is inconsistent with the pattern of setting, carries out axle to described receiving terminal and aims at adjusting, after having regulated, sends and confirms registration signal to transmitting terminal.
Wherein, described transmitting terminal is in the time sending training signal, monitor and within the time of setting, whether receive the confirmation registration signal that described transmitting terminal sends, if do not receive, resend above-mentioned training signal, when receiving that after described confirmation registration signal, described transmitting terminal stops sending above-mentioned training signal, parallel transmitting terminal sends the confirmation signal identical with described confirmation registration signal.
Wherein, whether described transmitting terminal receive and confirm when registration signal monitoring in the time of setting, and periodically sends training signal with the time interval of setting, until receive described confirmation registration signal.
Wherein, describedly receiving terminal is carried out to axle aim to regulate and comprise: using the variance of orbital angular momentum power spectrum as weighing the index of described receiving terminal departure degree, find the minimum direction of variance by specific algorithm, thereby determine the adjusting direction that axle is aimed at.
Wherein, describedly receiving terminal is carried out to axle aim to regulate and comprise respectively and regulating in the lateral shift (x, y) to axle with on to inclination (γ, the η) direction of axle.
Wherein, the concrete steps of described receiving terminal being carried out to the adjusting of axle aligning comprise: S61, described receiving terminal is carried out to coarse adjustment, and estimate the aligned position of described receiving terminal, and determine adjusting direction; S62 chooses arbitrarily two position L in adjusting direction
iand R
j, and L
iand R
jbe distributed in the both sides of described aligned position, wherein, i and j are positive integer, and i=j; S63, chooses L
iwith R
jpoint midway m, and R
jwith the point midway M of m, measure respectively and calculate the variance V (m) of orbital angular momentum power spectrum of described m position and the variance V (M) of the orbital angular momentum power spectrum of M position; S64, if V (m) >V (M), by L
i+1be chosen for the position of m, and determine whether and meet L
i+1+ eps<R
jif, not meeting, repeating step S63, if meet, arrives corresponding L by the position adjustments of described receiving terminal
i+1position, and finish regulate; If V (m)≤V (M), by R
j+1be chosen for the position of M, and determine whether and meet L
i+ eps<R
j+1if, not meeting, repeating step S63, if meet, arrives corresponding R by the position adjustments of described receiving terminal
j+1position, and finish to regulate, wherein, eps is according to the environment at described receiving terminal place with to regulating the parameter value that arranges of required precision.
Wherein, the orbital angular momentum electromagnetic that described training signal is preset mode.
According to another aspect of the present invention, provide a kind of axle of orbital angular momentum wireless communication system to aim at regulating system, described system comprises transmitting terminal and receiving terminal, wherein, described transmitting terminal comprises first signal transmitting element, for sending above-mentioned training signal and confirmation signal; Timing unit, continues to send described training signal for judging whether, and first signal receiving element, the described confirmation registration signal sending for receiving described receiving terminal; Described receiving terminal comprises secondary signal receiving element, the training signal and the confirmation signal that send for receiving described transmitting terminal; Pattern recognition unit, whether consistent with default pattern for judging the pattern of described training signal, and judge whether that described receiving terminal is carried out to axle aims at adjusting; Regulon, aims at adjusting for described receiving terminal being carried out to axle, and secondary signal transmitting element, for sending described confirmation registration signal.
The axle of a kind of orbital angular momentum radio communication of the present invention is aimed at control method and system thereof, use training signal to retransmit the flow process of confirmation and the method that regulating shaft is aimed at automatically, solve orbital angular momentum radio communication axis misalignment to the impact of surveying, ensured the reliability of end-to-end communication.
Brief description of the drawings
Can more clearly understand the features and advantages of the present invention by reference to accompanying drawing, accompanying drawing is schematically to should not be construed as the present invention is carried out to any restriction, in the accompanying drawings:
Fig. 1 shows the flow chart of the axle aligning control method of a kind of orbital angular momentum wireless communication system of the present invention;
Fig. 2 shows and uses the axle aligning control method of a kind of orbital angular momentum wireless communication system of the present invention to carry out the flow chart of the embodiment of axle aligning adjusting;
Fig. 3 shows the schematic diagram that X-direction is regulated of embodiments of the invention;
Fig. 4 shows the axle of a kind of orbital angular momentum wireless communication system of the present invention and aims at the structured flowchart of regulating system.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is described in detail.
Fig. 1 shows the flow chart of the axle aligning control method of a kind of orbital angular momentum wireless communication system of the present invention.
With reference to Fig. 1, the axle of a kind of orbital angular momentum wireless communication system of embodiments of the invention is aimed at control method, comprises step:
S1, receiving terminal, receiving after the training signal of transmitting terminal transmission, is identified the pattern of described training signal;
S2, if consistent with the pattern of setting, send and confirms registration signal to described transmitting terminal;
S3, if fruit is inconsistent with the pattern of setting, carries out axle to described receiving terminal and aims at adjusting, after having regulated, sends and confirms registration signal to transmitting terminal.
Receiving terminal is carried out to the adjusting of axle aligning specifically to be comprised: using the variance of orbital angular momentum power spectrum as the index of weighing departure degree, find the minimum direction of variance by specific algorithm, thereby determine the direction of axle aligning.
In the present embodiment, transmitting terminal, in the time sending training signal, monitors within the time of setting, whether to receive the confirmation registration signal that described transmitting terminal sends;
If do not receive, resend above-mentioned training signal, and with set the time interval periodically send training signal, until receive described confirmation registration signal;
When receiving that after described confirmation registration signal, described transmitting terminal stops sending above-mentioned training signal, parallel transmitting terminal sends the confirmation signal identical with described confirmation registration signal.
In the present embodiment, the training signal that transmitting terminal sends is predefined signal, as being the orbital angular momentum electromagnetic of preset mode.
In the present embodiment, the training signal that transmitting terminal sends be the orbital angular momentum mode value single-mode electromagnetic wave that is 0, in receiving terminal and the out-of-alignment situation of transmitting terminal, the electromagnetic wave that receiving terminal measures is the stack of different orbital angular momentum patterns, now receiving terminal can obtain the normalized power spectrum of different orbital angular momentum patterns, and calculate according to this recognition result, if this result is inconsistent with the pattern of setting in advance, transmitting terminal and receiving terminal misalignment are described, receiving terminal carries out the adjusting of axle aligning.
In the present embodiment, the out-of-alignment situation of axle can be divided into two classes, a class lateral shift (x, y), and another kind of is inclination (γ, η) to axle.When establishing x, y, γ, in η, any three is fixed value, while changing remaining variable, can obtain different power spectrum correspondingly and then obtain the variance V that different capacity is composed.Fig. 3 shows y, γ, and η is certain, the V-x curve of different x.With reference to Fig. 3, can see that curve is class parabolic type, and be aim in x direction in the situation that at x=0, variance minimum; And the axle deviation distance of increase x direction, variance V is dull increase thereupon.Similarly, only change y or γ or η, still can lead to the same conclusion.This explanation, variance V can be used as the index of weighing axle departure degree: variance V along with axle departure degree increases and monotonic increase, and when axle is on time, variance V reaches minimum value.
Based on this, the mechanism that can adopt quadruple to regulate, at x, y, γ, regulates respectively in the direction of η, finds the point of direction upside deviation minimum separately, the direction that has also just found axle to aim at.
Fig. 2 shows and uses the axle aligning control method of a kind of orbital angular momentum wireless communication system of the present invention to carry out the flow chart of the embodiment of axle aligning adjusting.Fig. 3 shows the schematic diagram that x direction of principal axis is regulated of embodiments of the invention.
The present embodiment is with the axial example that is adjusted to of x, referring to figs. 2 and 3, the concrete steps of the adjusting that the axle of receiving terminal is aimed at are:
S61, carries out coarse adjustment to receiving terminal, the aligned position O of estimation receiving terminal, and determine adjusting direction, i.e. x direction of principal axis;
S62 chooses arbitrarily two position L on x axle
iand R
j, and L
iand R
jbe distributed in the both sides of described aligned position, wherein, i and j are positive integer, and i=j;
S63 chooses L on x axle
iwith R
jpoint midway m, and R
jwith the point midway M of m, measure respectively and calculate the variance V (m) of orbital angular momentum power spectrum of described m position and the variance V (M) of the orbital angular momentum power spectrum of M position;
S64, if V (m) >V (M), by L
i+1be chosen for the position of m, and determine whether and meet L
i+1+ eps<R
jif, not meeting, repeating step S63, if meet, arrives corresponding L by the position adjustments of described receiving terminal
i+1position, and finish regulate;
If V (m)≤V (M), by R
j+1be chosen for the position of M, and determine whether and meet L
i+ eps<R
j+ 1, if do not meet, repeating step S63, if meet, arrives corresponding R by the position adjustments of described receiving terminal
j+1position, and finish regulate,
Wherein, eps is according to the environment at described receiving terminal place with to the parameter value that regulates required precision to arrange.
In an embodiment of the present invention, for the adjusting in other directions of receiving terminal, can use above-mentioned identical method, not repeat them here.
In another embodiment of the present invention, provide a kind of axle of orbital angular momentum wireless communication system to aim at regulating system, this system comprises transmitting terminal 100 and the receiving terminal 200 in said method, wherein,
Transmitting terminal 100 comprises first signal transmitting element 110, for sending above-mentioned training signal and confirmation signal;
Timing unit 120, for judging whether to continue to send described training signal, and
First signal receiving element 130, the confirmation registration signal sending for receiving receiving terminal 200.
Receiving terminal 200 comprises secondary signal receiving element 210, the training signal sending for receiving end/sending end 100 and confirmation signal;
Pattern recognition unit 220, whether consistent with default pattern for the pattern of training of judgement signal, and judge whether that receiving terminal 200 is carried out to axle aims at adjusting;
Regulon 230, aims at adjusting for receiving terminal 200 being carried out to axle, and
Secondary signal transmitting element 240, for sending and confirm registration signal to transmitting terminal 100.
Table 1 shows and uses the axle aligning control method of orbital angular momentum wireless communication system to carry out the simulation result that axle aligning regulates.
As shown in table 1, L and R are respectively two initial positions of choosing when axle is aimed at adjusting carrying out, and its offset distance is set to the value of (R-L).In table 1, can calculate, in the scope of required precision, in the situation that deviation distance increase is 10 times, need the number of times of the adjusting increasing to be no more than 5 times, as in the time that deviation distance is increased to 1 from 0.1, it regulates number of times to increase by 5 times.
In an embodiment of the present invention, in the time calculating the offset distance of transmitting terminal and receiving terminal, its offset distance is by electromagnetic waist beamwidth band (millimeter magnitude) normalization, therefore uses the method for enforcement of the present invention to carry out axle and aims to regulate and can obtain higher precision.
Table 1 uses the axle of orbital angular momentum wireless communication system to aim at the simulation result of control method
| L | R | Regulate number of times | Error |
| -0.05 | 0.05 | 12 | -0.0023 |
| -0.5 | 0.5 | 17 | -0.0028 |
| -5 | 5 | 21 | -0.0025 |
| -0.9 | 0.1 | 15 | -0.0023 |
| -9 | 1 | 20 | -0.0027 |
The axle of a kind of orbital angular momentum radio communication of the present invention is aimed at control method and system thereof, use training signal to retransmit the flow process of confirmation and the method that regulating shaft is aimed at automatically, solve orbital angular momentum radio communication axis misalignment to the impact of surveying, ensured the reliability of end-to-end communication.
Although described by reference to the accompanying drawings embodiments of the present invention, but those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, such amendment and modification all fall into by within claims limited range.
Claims (8)
1. the axle of orbital angular momentum wireless communication system is aimed at a control method, it is characterized in that, comprising:
S1, receiving terminal, receiving after the training signal of transmitting terminal transmission, is identified the pattern of described training signal;
S2, if consistent with the pattern of setting, send and confirms registration signal to described transmitting terminal;
S3, if fruit is inconsistent with the pattern of setting, carries out axle to described receiving terminal and aims at adjusting, after having regulated, sends and confirms registration signal to transmitting terminal.
2. the axle of a kind of orbital angular momentum wireless communication system according to claim 1 is aimed at control method, it is characterized in that,
Described transmitting terminal is in the time sending training signal, monitor and within the time of setting, whether receive the confirmation registration signal that described transmitting terminal sends, if do not receive, resend above-mentioned training signal, when receiving after described confirmation registration signal, described transmitting terminal stops sending above-mentioned training signal, and parallel transmitting terminal sends the confirmation signal identical with described confirmation registration signal.
3. the axle of a kind of orbital angular momentum wireless communication system according to claim 1 is aimed at control method, it is characterized in that, in the time that described transmitting terminal is being set in monitoring, whether receive while confirming registration signal, the time interval with setting periodically sends training signal, until receive described confirmation registration signal.
4. the axle of a kind of orbital angular momentum wireless communication system according to claim 1 is aimed at control method, it is characterized in that, describedly receiving terminal is carried out to axle aim to regulate and comprise: using the variance of orbital angular momentum power spectrum as weighing the index of described receiving terminal departure degree, find the minimum direction of variance by specific algorithm, thereby determine the adjusting direction that axle is aimed at.
5. the axle of a kind of orbital angular momentum wireless communication system according to claim 4 is aimed at control method, it is characterized in that, describedly receiving terminal is carried out to axle aims to regulate and comprises respectively and regulating in the lateral shift to axle with on to the incline direction of axle.
6. the axle of a kind of orbital angular momentum wireless communication system according to claim 4 is aimed at control method, it is characterized in that, the concrete steps of described receiving terminal being carried out to the adjusting of axle aligning comprise:
S61, carries out coarse adjustment to described receiving terminal, estimates the aligned position of described receiving terminal, and determines adjusting direction;
S62 chooses arbitrarily two position L in adjusting direction
iand R
j, and L
iand R
jbe distributed in the both sides of described aligned position, wherein, i and j are positive integer, and i=j;
S63, chooses L
iwith R
jpoint midway m, and R
jwith the point midway M of m, measure respectively and calculate the variance V (m) of orbital angular momentum power spectrum of described m position and the variance V (M) of the orbital angular momentum power spectrum of M position;
S64, if V (m) >V (M), by L
i+1be chosen for the position of m, and determine whether and meet L
i+1+ eps<R
jif, not meeting, repeating step S63, if meet, arrives corresponding L by the position adjustments of described receiving terminal
i+1position, and finish regulate;
If V (m)≤V (M), by R
j+1be chosen for the position of M, and determine whether and meet L
i+ eps<R
j+1if, not meeting, repeating step S63, if meet, arrives corresponding R by the position adjustments of described receiving terminal
j+1position, and finish regulate,
Wherein, eps is according to the environment at described receiving terminal place with to the parameter value that regulates required precision to arrange.
7. the axle of a kind of orbital angular momentum wireless communication system according to claim 1 is aimed at control method, it is characterized in that the orbital angular momentum electromagnetic that described training signal is preset mode.
8. the axle of orbital angular momentum wireless communication system is aimed at a regulating system, it is characterized in that, described system comprises transmitting terminal and receiving terminal, wherein,
Described transmitting terminal comprises first signal transmitting element, for sending above-mentioned training signal and confirmation signal;
Timing unit, for judging whether to continue to send described training signal, and
First signal receiving element, the described confirmation registration signal sending for receiving described receiving terminal;
Described receiving terminal comprises secondary signal receiving element, the training signal and the confirmation signal that send for receiving described transmitting terminal;
Pattern recognition unit, whether consistent with default pattern for judging the pattern of described training signal, and judge whether that described receiving terminal is carried out to axle aims at adjusting;
Regulon, aims at adjusting for described receiving terminal being carried out to axle, and
Secondary signal transmitting element, for sending described confirmation registration signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410175771.4A CN103986531B (en) | 2014-04-28 | 2014-04-28 | A kind of the axis alignment adjusting method and its system of orbital angular momentum wireless communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410175771.4A CN103986531B (en) | 2014-04-28 | 2014-04-28 | A kind of the axis alignment adjusting method and its system of orbital angular momentum wireless communication system |
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| Publication Number | Publication Date |
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| CN103986531A true CN103986531A (en) | 2014-08-13 |
| CN103986531B CN103986531B (en) | 2019-04-02 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106888059A (en) * | 2017-01-22 | 2017-06-23 | 浙江大学 | A kind of off-axis detection method of vortex beam rail angular momentum pattern |
| CN112702096A (en) * | 2019-10-23 | 2021-04-23 | 华为技术有限公司 | Signal processing method and related device |
| WO2022184158A1 (en) * | 2021-03-05 | 2022-09-09 | Qualcomm Incorporated | Connection setup in oam-based communication system |
| WO2022198669A1 (en) * | 2021-03-26 | 2022-09-29 | 北京小米移动软件有限公司 | Method and apparatus for determining oam beam transmission direction, and terminal device, access network device and storage medium |
| WO2023141848A1 (en) * | 2022-01-27 | 2023-08-03 | Qualcomm Incorporated | Boresight direction alignment based on reference signal transmission and reception |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902276A (en) * | 2010-06-24 | 2010-12-01 | 北京理工大学 | Free space laser communication system based on orbital angular momentum of light beams |
| WO2013092470A1 (en) * | 2011-12-21 | 2013-06-27 | Studio Lambda Sas Di Viviana Marangoni & C. | Apparatus for the realization of a radio link and relative method |
| CN103474776A (en) * | 2013-09-22 | 2013-12-25 | 浙江大学 | Method for generating radio frequency orbital angular momentum beams based on annular traveling wave antenna |
-
2014
- 2014-04-28 CN CN201410175771.4A patent/CN103986531B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902276A (en) * | 2010-06-24 | 2010-12-01 | 北京理工大学 | Free space laser communication system based on orbital angular momentum of light beams |
| WO2013092470A1 (en) * | 2011-12-21 | 2013-06-27 | Studio Lambda Sas Di Viviana Marangoni & C. | Apparatus for the realization of a radio link and relative method |
| CN103474776A (en) * | 2013-09-22 | 2013-12-25 | 浙江大学 | Method for generating radio frequency orbital angular momentum beams based on annular traveling wave antenna |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106888059A (en) * | 2017-01-22 | 2017-06-23 | 浙江大学 | A kind of off-axis detection method of vortex beam rail angular momentum pattern |
| CN112702096A (en) * | 2019-10-23 | 2021-04-23 | 华为技术有限公司 | Signal processing method and related device |
| WO2021077921A1 (en) * | 2019-10-23 | 2021-04-29 | 华为技术有限公司 | Signal processing method and related apparatus |
| CN112702096B (en) * | 2019-10-23 | 2022-12-06 | 华为技术有限公司 | Signal processing method and related device |
| WO2022184158A1 (en) * | 2021-03-05 | 2022-09-09 | Qualcomm Incorporated | Connection setup in oam-based communication system |
| WO2022198669A1 (en) * | 2021-03-26 | 2022-09-29 | 北京小米移动软件有限公司 | Method and apparatus for determining oam beam transmission direction, and terminal device, access network device and storage medium |
| WO2023141848A1 (en) * | 2022-01-27 | 2023-08-03 | Qualcomm Incorporated | Boresight direction alignment based on reference signal transmission and reception |
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