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 PDF

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Publication number
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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calibration
phased array
antenna
signal
transmitting
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CN109683146B (en
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季帅
王敬东
关炀
王轶
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CETC 20 Research Institute
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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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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • 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

A kind of phased array emission calibrating method based on orthogonal coding waveform
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)

1.一种基于正交编码波形的相控阵发射校准方法，其特征在于包括下述步骤：1. a phased array transmission calibration method based on quadrature coded waveform, is characterized in that comprising the following steps: (1)搭建标校塔，并在其上放置辅助天线和信号收发系统，待测相控阵天线与辅助天线的位置满足天线的远场辐射条件，且待测相控阵天线与辅助天线工作在同一频段；(1) Build a calibration tower, and place an auxiliary antenna and a signal transceiver system on it. The positions of the phased array antenna to be tested and the auxiliary antenna meet the far-field radiation conditions of the antenna, and the phased array antenna to be tested and the auxiliary antenna work in the same frequency band; (2)利用正交编码产生N个相互正交的发射波形，分别通过待测相控阵天线对应的N个通道发射；所有通道的正交编码波形具有图钉形的模糊函数；(2) Using orthogonal coding to generate N mutually orthogonal transmit waveforms, which are respectively transmitted through N channels corresponding to the phased array antenna to be tested; the orthogonal coding waveforms of all channels have a pushpin-shaped fuzzy function; (3)各通道发射信号经放大后在空间中合成发射波束；(3) The transmitted signals of each channel are amplified and synthesized in space to transmit beams; (4)辅助天线接收到发射信号，传输至信号收发系统，利用相应的正交编码进行N次并行解扩处理，形成了N组回波信号，并对N组回波信号同时进行AD采样，同时得到所有通道的幅相参数；(4) The auxiliary antenna receives the transmitted signal, transmits it to the signal transceiver system, and performs N parallel despreading processing using the corresponding orthogonal code to form N groups of echo signals, and simultaneously perform AD sampling on the N groups of echo signals, Obtain the amplitude and phase parameters of all channels at the same time; (5)依据得到的所有通道幅相值参数，实现最终的阵面发射校准。(5) According to the obtained amplitude and phase value parameters of all channels, the final frontal emission calibration is realized. 2.根据权利要求1所述的一种基于正交编码波形的相控阵发射校准方法，其特征在于：2. a kind of phased array transmission calibration method based on quadrature coded waveform according to claim 1, is characterized in that: 所述的步骤(5)中，假定第(i，k)个阵元的接收/发射信号为其中，Δaik、Δφik分别为第(i，k)个阵元的幅相不一致性参数；为修正幅相不一致性参数，应与对应的校正系数相乘，第i个校正通道测试采样信号为zi＝Ii+jQi，校正系统 In the described step (5), it is assumed that the received/transmitted signal of the (i, k)th array element is: Among them, Δa ik and Δφ ik are the amplitude-phase inconsistency parameters of the (i, k)th array element, respectively; to correct the amplitude-phase inconsistency parameters, they should be multiplied by the corresponding correction coefficients, The i-th calibration channel test sample signal is zi =I i +jQ i , the calibration system
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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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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
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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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