CN107359922B - A kind of neighbours that beam scanning is combined with DOA discovery and accuracy alignment method - Google Patents
A kind of neighbours that beam scanning is combined with DOA discovery and accuracy alignment method Download PDFInfo
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- CN107359922B CN107359922B CN201710497885.4A CN201710497885A CN107359922B CN 107359922 B CN107359922 B CN 107359922B CN 201710497885 A CN201710497885 A CN 201710497885A CN 107359922 B CN107359922 B CN 107359922B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
Abstract
The invention discloses neighbours' discoveries and alignment scheme that a kind of beam scanning is combined with DOA, it is related to the discovery of the neighbours in microwave phased antenna systems non-stop layer networking and beam alignment.Each node switches first with antenna in the program and fixed beam figuration realizes that thick beam scanning and neighbours are found, then further realizes accurate wave beam using DOA estimation and digital beam forming and is aligned.This scheme can be applied in microwave non-stop layer constructing communication network, solves neighbours' discovery and accurate wave beam alignment issues, effectively reduces hardware and software algorithm complexity, can satisfy the demand of vehicle-mounted, carrier-borne and unloaded microwave equipment multinode non-stop layer networking.
Description
Technical field
The present invention relates to neighbours' discoveries and alignment scheme that a kind of beam scanning is combined with DOA, can be realized each node
The more neighbours' discoveries of omnidirectional are precisely aligned with wave beam, are applicable in the networking of non-stop layer multinode, be can satisfy vehicle-mounted, carrier-borne and unloaded microwave
The needs of equipment communication and networking.
Background technique
In vehicle-mounted, carrier-borne and unloaded microwave communication, in order to meet the requirement of multinode networking, its phased antenna system is needed
System can be realized 360 ° of high-precision neighbours discoveries and be aligned with wave beam.Neighbours' discovery common at present is aligned with wave beam mainly to be had: 1)
DOA algorithm for estimating, using multichannel T/R component receive signal, base band using DOA algorithm for estimating carry out neighbours find with it is adaptive
Answer wave beam forming；2) antenna switching scheme switches using to antenna beam, realizes the scanning and switching of wave beam.However DOA estimates
Algorithm needs a large amount of radio-frequency channel, the device is complicated degree and higher cost；Antenna switching scheme precision is intersected, and wave beam crosspoint
Gain is lower, is not able to satisfy the requirement of high-precision wave beam alignment.With the continuous development of networking microwave, it is badly in need of a kind of cost
Neighbours' discovery low, with high accuracy and wave beam alignment scheme, meet the requirement of microwave communication networking.
Summary of the invention
It is an object of the invention to avoid above-mentioned background technique from applying the shortcoming in directional communication, and provide one
The high-precision neighbours' discovery of kind low complex degree and alignment scheme.The program forms multiple wave beams first with switching antenna
Omnidirectional is scanned, between node wave beam alignment realize neighbours discovery, then each node using the corresponding mutiple antennas of wave beam into
Row DOA estimation, realizes precisely aligning for wave beam.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of neighbours that beam scanning is combined with DOA discovery with precisely align scheme, comprising the following steps:
(1) after each node time synchronizes, the N channel baseband processing component control M of transmitting node selects N switch block at M
Adjacent N number of plane directional aerial is selected to form an antenna element in plane directional aerial；Wherein, M is oneself more than or equal to 6
So number, N are the natural number less than or equal to M/2；
(2) transmitting node generates that neighbours have found frame and incoming N channel baseband processing unit is modulated and emits in MAC layer
Thick wave beam forming carries out up-conversion by N channel radio frequency component, is emitted by the antenna element of selection；
(3) the N channel baseband processing component control of receiving node selects N component control M to select N switch block flat at M by M
Adjacent N number of plane directional aerial is selected to form an antenna element in the directional aerial of face；
(4) receiving node receives neighbours by the antenna element of selection and finds frame, if receiving neighbours finds frame, through N
Channel radio frequency component carries out down coversion, carries out receiving thick wave beam forming and demodulation by N channel baseband processing unit, is passed to and receives
AC layers of node M, and replied message to transmitting node transmission；Otherwise return step (1)；
(5) transmitting node, which receives, replies message laggard traveling wave beam alignment；
(6) determine that transmitting node and receiving node participate in N number of antenna of work respectively and carry out time slot after wave beam alignment
Neighbours' discovery between node is completed in reservation；
(7) transmitting node emits signal by participating in N number of antenna of work；
(8) receiving node receives the signal of transmitting node by participating in N number of antenna of work, carries out phase excitation to signal
It is equivalent to linear array, and carries out DOA estimation, the direction estimation of useful signal and interference signal is realized, according to direction estimation to transmitting
Node carries out wave beam and precisely aligns, and carries out null wave to interference signal.
Wherein, in step (1) and step (3) transmitting node and receiving node selected in M plane directional aerial it is adjacent
N number of plane directional aerial form an antenna element, selected according to the scanning direction of setting, and transmitting node and reception
The scanning direction of node is consistent, but the different scanning period uses different starting points.
Wherein, each antenna element forms one or more thick wave beams, and a time slot only has 1 thick wave beam and works, respectively
Wave beam realizes 360 ° of scannings according to sequence clockwise or counterclockwise.
It has the advantages that compared with the background technology, the present invention
1. the present invention, compared with beam switchover scheme, each node can obtain the incoming wave angle estimation of higher precision, thus
Wave beam maximum gain can be directed at communication node, and avoid in beam switchover scheme that wave beam crosspoint antenna gain is too low to ask
Topic.
2. on the one hand the present invention uses less radio-frequency channel compared with omnidirectional DOA estimation, system hardware reality is reduced
Existing complexity, to reduce costs；On the other hand reduce processing signal dimension, reduce computational complexity.
Detailed description of the invention
Fig. 1 is that neighbours of the invention have found to be directed at schematic diagram with wave beam.
Fig. 2 is node device composition block diagram of the invention.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawing:
Fig. 1 shows neighbor discovery process of the invention by taking M=8 as an example, and entire neighbours' discovery is divided into two steps.First
Step, beam scanning alignment after each node time synchronizes, emit signal, (100-A) % using the probability of A% in identical time slot
Probability receive signal；It controls wave beam and carries out 360 ° of scannings, transmitting-receiving node is scanned according to different scan patterns, embodiment
Each node emits according to 30% probability, and 70% probability receives, and node 1 is transmitting node, and node 2 is receiving node, scanning
Wave beam coarse alignment and interactive information after for several times realize neighbours' discovery, determine work antenna.Second step, DOA estimation, each node benefit
Useful signal is carried out with user oriented N (N=3) a antenna and interference signal direction is accurately estimated, DOA estimated accuracy≤
1°。
Fig. 2 is each node physical layer composition of the invention, including N channel baseband processing component 1, N channel radio frequency component 2, M
N switch block 3 and the aerial array 4 of M (M=8) array element compositions is selected to form.Example carries out line according to Fig. 2, and wherein solid line is
Signal is transmitted, dotted line is control signal.
Wherein, N channel baseband processing component is responsible for DOA estimation and wave beam forming, can control M and N switch block is selected to select
Corresponding work antenna is able to carry out DOA estimation, and carries out wave beam forming with signal is received to transmitting；N channel radio frequency component is negative
The power amplification and the road N of blaming the road N transmitting signal receive the low noise amplification of signal；M selects N switch block can be according to the control information
N number of (N=3) antenna is selected from M antenna to emit and receive for signal, rear end radio-frequency channel quantity is reduced, to reduce
System complexity reduces cost；Aerial array is the face M battle array, and every face directional aerial can be realized N/M*180 ° of wave cover, often
Coverage area of a direction in the face N (N=3) antenna.
Wherein, each node selects N (N=3) switch selection component that N number of day towards all directions may be selected using M (M=8)
Line can form 360 ° of multiple thick wave covers in conjunction with wave beam forming；N number of adjacent antenna can form 1 thick wave beam；One time slot is only
There is 1 wave beam to work, 360 ° of scannings can be realized according to clockwise or quasi- clocking sequence in each wave beam.
Wherein, after wave beam coarse alignment, N channel baseband processing component can carry out phase to the signal that respective antenna receives
Excitation is equivalent to linear array, can carry out DOA estimation in conjunction with MUSIC, ESPRIT scheduling algorithm, and carry out transmitting signal up to information according to wave
With the null wave of the accurate wave beam forming and interference signal that receive signal.Specific step is as follows:
(1) after each node time synchronizes, the N channel baseband processing component control M of transmitting node selects N switch block at M
Adjacent N number of plane directional aerial is selected to form an antenna element in plane directional aerial；Wherein, M is oneself more than or equal to 6
So number, N are the natural number less than or equal to M/2；
(2) transmitting node generates that neighbours have found frame and incoming N channel baseband processing unit is modulated and emits in MAC layer
Thick wave beam forming carries out up-conversion by N channel radio frequency component, is emitted by the antenna element of selection；
(3) the N channel baseband processing component control of receiving node selects N component control M to select N switch block flat at M by M
Adjacent N number of plane directional aerial is selected to form an antenna element in the directional aerial of face；
(4) receiving node receives neighbours by the antenna element of selection and finds frame, if receiving neighbours finds frame, through N
Channel radio frequency component carries out down coversion, carries out receiving thick wave beam forming and demodulation by N channel baseband processing unit, is passed to and receives
AC layers of node M, and replied message to transmitting node transmission；Otherwise return step (1)；
(5) transmitting node, which receives, replies message laggard traveling wave beam alignment；
(6) it determines that transmitting node and receiving node participate in N number of antenna of work respectively after wave beam alignment, completes between node
Neighbours discovery；
(7) transmitting node emits signal by participating in N number of antenna of work；
(8) receiving node receives the signal of transmitting node by participating in N number of antenna of work, carries out phase excitation to signal
It is equivalent to linear array, and and MUSIC, ESPRIT scheduling algorithm is combined to carry out DOA estimation, the direction of realization useful signal and interference signal
Estimation carries out wave beam to transmitting node according to direction estimation and precisely aligns, and carries out null wave to interference signal.
Working principle: each node is emitted and is received with certain probability, and using switching antenna, and sequence figuration M thick
Wave beam is scanned according to scanning pattern, realizes the wave beam coarse alignment of each adjacent node；Each node selection is towards phase after coarse alignment
The antenna of neighbors carries out DOA estimation using MUSIC algorithm or other DOA algorithms, realizes that each node is useful and interference signal
Direction estimation；According to direction estimation information, wave beam is carried out to neighbours and is precisely aligned, and null wave is carried out to interference.
Claims (3)
1. neighbours' discovery and accuracy alignment method that a kind of beam scanning is combined with DOA, which is characterized in that including following step
It is rapid:
(1) after each node time synchronizes, the N channel baseband processing component control M of transmitting node selects N switch block in M plane
Adjacent N number of plane directional aerial is selected to form an antenna element in directional aerial；Wherein, M is the nature more than or equal to 6
Number, N are the natural number less than or equal to M/2；
(2) transmitting node generates neighbours' discovery frame in MAC layer and incoming N channel baseband processing component is modulated and emits thick wave
Beam figuration carries out up-conversion by N channel radio frequency component, is emitted by the antenna element of selection；
(3) the N channel baseband processing component control M of receiving node selects N switch block to select in M plane directional aerial adjacent
N number of plane directional aerial form an antenna element；
(4) receiving node receives neighbours by the antenna element of selection and finds frame, if receiving neighbours finds frame, through N channel
Radio frequency component carries out down coversion, carries out receiving thick wave beam forming and demodulation by N channel baseband processing component, is passed to receiving node
MAC layer, and replied message to transmitting node transmission；Otherwise return step (1)；
(5) transmitting node, which receives, replies message laggard traveling wave beam alignment；
(6) determine that transmitting node and receiving node participate in N number of antenna of work respectively and carry out time slot reservation after wave beam alignment,
Complete neighbours' discovery between node；
(7) transmitting node emits signal by participating in N number of antenna of work；
(8) receiving node receives the signal of transmitting node by participating in N number of antenna of work, and it is equivalent to carry out phase excitation to signal
For linear array, and DOA estimation is carried out, the direction estimation of useful signal and interference signal is realized, according to direction estimation to transmitting node
It carries out wave beam to precisely align, and null wave is carried out to interference signal；
The neighbours that beam scanning is combined with DOA are completed to find and precisely align.
2. neighbours' discovery and accuracy alignment method that a kind of beam scanning according to claim 1 is combined with DOA, special
Sign is, transmitting node and receiving node select adjacent N number of flat in M plane directional aerial in step (1) and step (3)
Face directional aerial forms an antenna element, is selected according to the scanning direction of setting, and transmitting node and receiving node
Scanning direction is consistent, but the different scanning period uses different starting points.
3. neighbours' discovery and accuracy alignment method that a kind of beam scanning according to claim 2 is combined with DOA, special
Sign is that each antenna element forms one or more thick wave beams, and a time slot only has 1 thick wave beam and works, each thick wave
Beam realizes 360 ° of scannings according to sequence clockwise or counterclockwise.
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| CN110098856B (en) * | 2018-01-31 | 2021-06-22 | 华为技术有限公司 | Antenna device and related equipment |
| CN110149126B (en) * | 2019-05-24 | 2021-04-13 | 北京睿信丰科技有限公司 | Beam forming method and beam forming device of 3D-MIMO system |
| CN115334489B (en) * | 2022-10-13 | 2023-03-24 | 天地信息网络研究院(安徽)有限公司 | High mobility platform ad hoc network neighbor discovery method based on panoramic beams |
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