CN109683146A - A kind of phased array emission calibrating method based on orthogonal coding waveform - Google Patents
A kind of phased array emission calibrating method based on orthogonal coding waveform Download PDFInfo
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- CN109683146A CN109683146A CN201811579142.2A CN201811579142A CN109683146A CN 109683146 A CN109683146 A CN 109683146A CN 201811579142 A CN201811579142 A CN 201811579142A CN 109683146 A CN109683146 A CN 109683146A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
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- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The present invention provides a kind of phased array emission calibrating methods based on orthogonal coding waveform, build calibration tower, and auxiliary antenna and signal receiving and transmitting system are placed on it, N number of mutually orthogonal transmitted waveform is generated using orthogonal coding, each channel emission signal is amplified to synthesize launching beam in space, and auxiliary antenna receives transmitting signal, is transmitted to signal receiving and transmitting system, according to obtained all channel width phase value parameters, final front transmitting calibration is realized.The present invention orthogonal coding waveform mutually orthogonal by using transmitting several groups, calibrates while realization to all transmission channels of digital active phase array antenna, simplifies calibration process, shorten the time of system calibration.
Description
Technical field
The present invention relates to a kind of calibration method, while transmission channels multiple mainly for digital Connectors for Active Phased Array Radar
Calibration.
Background technique
The calibration of antenna to engineering Multi-mode Solid-state Phased Array Radar for it is extremely important, can be used for inspecting periodically active antenna,
T/R component operation state, assesses active antenna performance.The purpose of monitoring be measurement active device and with potential result ratio
Compared with to judge the quality of active channel；The purpose of calibration is the design for making test result constantly approach antenna by closed-loop control
Original intention.
The calibration of the current digital multiple receiving channels of active phased array mainly passes through external sort algorithm and issues in far field condition
Parallel wave is penetrated, parallel wave is received simultaneously by all receiving channels, is obtained through low noise amplification, frequency conversion, AD sampling, digital processing
The width in all channels is mutually worth, and on the basis of wherein any channel, realizes the calibration of amplitude and phase in other channels.
In transmit state, the transmitting signal in all channels will synthesize digital active phased array in space, in remote
Receiving antenna under field condition can not isolate the signal in each channel from the echo-signal received, therefore calibrate under far field condition
The mode that digital active phased array can only take single channel to calibrate constitutes all of digital active phased array by control
The working condition of component, width phase state of the test per transmission channel all the way, then on the basis of wherein any channel, finally realize whole
The calibration of a front transmission channel.Such transmitting calibration mode causes the waste of great time resource and process resource, urgently
New transmitting calibration mode is needed to improve.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of phased array transmitting calibration based on orthogonal coding waveform
Method, transmission channels multiple mainly for digital Connectors for Active Phased Array Radar whiles, calibrate.
The technical solution adopted by the present invention to solve the technical problems the following steps are included:
(1) calibration tower is built, and places auxiliary antenna and signal receiving and transmitting system on it, phased array antenna to be measured and auxiliary
The position of antenna meets the far-field radiation condition of antenna, and phased array antenna to be measured and auxiliary antenna work in same frequency range；
(2) N number of mutually orthogonal transmitted waveform is generated using orthogonal coding, it is corresponding by phased array antenna to be measured respectively
N number of channel emission；The orthogonal coding waveform in all channels has the ambiguity function of drawing pin shape；
(3) each channel emission signal is amplified synthesizes launching beam in space；
(4) auxiliary antenna receives transmitting signal, is transmitted to signal receiving and transmitting system, carries out N using corresponding orthogonal coding
Secondary parallel despreading processing forms N group echo-signal, and carries out AD sampling simultaneously to N group echo-signal, while obtaining all logical
The width phase parameter in road；
(5) according to obtained all channel width phase value parameters, final front transmitting calibration is realized.
In the step (5), it is assumed that the reception of (i, k) a array element/transmitting signal isWherein, Δ aik、ΔφikThe respectively sensor gain and phase uncertainties ginseng of (i, k) a array element
Number；For amendment sensor gain and phase uncertainties parameter, should be multiplied with corresponding correction coefficient,I-th of correction channel
Test sample signal is zi=Ii+jQi, correct system
The beneficial effects of the present invention are: the orthogonal coding waveform mutually orthogonal by using transmitting several groups, is realized to complete
It is calibrated while all transmission channels of digital active phased array antenna, simplifies calibration process, shorten the time of system calibration.
Detailed description of the invention
Fig. 1 is systematic schematic diagram of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples, and the present invention includes but are not limited to following implementations
Example.
Referring to Fig. 1, the system that the embodiment of the present invention is related to includes phased array antenna to be measured and coupled transmitting letter
Number control system, the calibration tower with far field condition built according to phased array antenna position and its auxiliary day being placed above
Line, signal receiving and transmitting system.Wherein, phased array antenna and calibration tower and its auxiliary antenna placement location being placed above need to meet day
The far-field radiation condition of line, and above two antenna needs work in same frequency range；Transmitting whistle control system is phased-array radar
Included, function is to receive external control signal to carry out real-time control to the transmitting signal of phased array antenna；Signal receiving and transmitting system
Major function includes: to receive auxiliary antenna when providing control signal, reception for the transmitting whistle control system of phased-array radar
To microwave signal be converted to the width in each channel and be mutually worth, and be mutually worth according to this width and realize final front transmitting calibration.
The embodiment of the present invention the following steps are included:
The N number of channel for emitting the digital active phase array antenna of whistle control system control transmitting utilizes orthogonal coding to generate
N number of mutually orthogonal transmitted waveform (transmitting signal through mutually orthogonal N group orthogonal coding spread processing, all channels it is orthogonal
Coding waveforms have the ambiguity function of drawing pin shape)；
Each channel emission signal is amplified to synthesize launching beam in space；
Auxiliary antenna receives the transmitting signal of digital active phase array antenna, is transmitted to signal receiving and transmitting system, signal
Receive-transmit system carries out the despreading that n times carry out parallel using corresponding orthogonal coding to echo-signal and handles, and forms N group echo letter
Number, and AD sampling and pretreatment are carried out simultaneously to N group echo-signal, it is final to obtain the width phase parameter in all channels simultaneously
According to obtained all channel width phase value parameters, final front transmitting calibration is realized.
It is assumed that the reception of (i, k) a array element/transmitting signal isWherein, Δ aik、
ΔφikThe respectively sensor gain and phase uncertainties parameter of (i, k) a array element；For correct sensor gain and phase uncertainties parameter, should with it is corresponding
Correction coefficient is multiplied,I-th of correction channel test sample signal is zi=Ii+jQi, corrects system
Claims (2)
1. a kind of phased array emission calibrating method based on orthogonal coding waveform, it is characterised in that include the following steps:
(1) calibration tower is built, and places auxiliary antenna and signal receiving and transmitting system, phased array antenna to be measured and auxiliary antenna on it
Position meet the far-field radiation condition of antenna, and phased array antenna to be measured and auxiliary antenna work in same frequency range；
(2) N number of mutually orthogonal transmitted waveform is generated using orthogonal coding, it is corresponding N number of by phased array antenna to be measured respectively
Channel emission；The orthogonal coding waveform in all channels has the ambiguity function of drawing pin shape；
(3) each channel emission signal is amplified synthesizes launching beam in space；
(4) auxiliary antenna receives transmitting signal, is transmitted to signal receiving and transmitting system, carries out n times simultaneously using corresponding orthogonal coding
Row despreading processing forms N group echo-signal, and carries out AD sampling simultaneously to N group echo-signal, while obtaining all channels
Width phase parameter；
(5) according to obtained all channel width phase value parameters, final front transmitting calibration is realized.
2. a kind of phased array emission calibrating method based on orthogonal coding waveform according to claim 1, it is characterised in that:
In the step (5), it is assumed that the reception of (i, k) a array element/transmitting signal is
Wherein, Δ aik、ΔφikThe respectively sensor gain and phase uncertainties parameter of (i, k) a array element；To correct sensor gain and phase uncertainties parameter,
It should be multiplied with corresponding correction coefficient,I-th of correction channel test sample signal is zi=Ii+jQi, school
Positive system
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Cited By (5)
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|---|---|---|---|---|
| CN109946662A (en) * | 2019-05-06 | 2019-06-28 | 成都远望科技有限责任公司 | Calibration System in a kind of phased array weather radar machine |
| CN110261830A (en) * | 2019-06-26 | 2019-09-20 | 南京国睿安泰信科技股份有限公司 | A kind of performance calibration device for radar echo simulator |
| CN111431636A (en) * | 2020-04-21 | 2020-07-17 | 中国电子科技集团公司第五十四研究所 | Online calibration method for large phased array antenna |
| WO2022236487A1 (en) * | 2021-05-08 | 2022-11-17 | Oppo广东移动通信有限公司 | Wireless communication method, terminal device, and network device |
| CN117518206A (en) * | 2024-01-04 | 2024-02-06 | 湖南卫导信息科技有限公司 | Multi-beam phased array antenna performance parameter testing system and method |
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