CN112350751B - Multi-channel wide-band amplitude and phase calibration device for satellite communication - Google Patents
Multi-channel wide-band amplitude and phase calibration device for satellite communication Download PDFInfo
- Publication number
- CN112350751B CN112350751B CN202011213869.6A CN202011213869A CN112350751B CN 112350751 B CN112350751 B CN 112350751B CN 202011213869 A CN202011213869 A CN 202011213869A CN 112350751 B CN112350751 B CN 112350751B
- Authority
- CN
- China
- Prior art keywords
- amplitude
- module
- channel
- phase error
- digital
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/005—Control of transmission; Equalising
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a multichannel broadband amplitude and phase calibration device for satellite communication, and belongs to the technical field of signal processing. The device comprises a controller, a power supply processing module, a multiplexer, a balancing module, an amplitude-phase error calculation module and a plurality of TR components, wherein the amplitude-phase error calculation module is connected with the balancing module, each TR component is connected with the balancing module through an up-conversion channel and a down-conversion channel, and each down-conversion channel is also connected with the amplitude-phase error calculation module; in addition, each TR component is also connected with a multiplexer, and the multiplexer is connected with the amplitude-phase error calculation module through a down-conversion channel. Compared with the commonly applied single-tone signal calibration, the broadband and multichannel amplitude-phase error calibration method based on the linear frequency modulation signal calibration algorithm can conveniently realize the broadband and multichannel amplitude-phase error calibration function in a digital domain, and has the characteristics of high integration degree, simple structure, high reliability, convenience in scale expansion and the like.
Description
Technical Field
The invention belongs to the field of array signal processing of a digital phased array antenna and signal processing of satellite communication, and particularly relates to a multi-channel wide-band amplitude and phase calibration device for satellite communication.
Background
The active phased array antenna has the advantages of small volume, low loss, low profile, easy realization of beam zeroing, beam forming and multi-beam, agile adjustment of beam pointing and the like, and is widely applied in recent years. However, due to various factors such as inconsistency of devices and environmental changes, a phased array antenna may have a large amplitude-phase error, which causes a gain reduction and a side lobe increase, and thus, a self-calibration function of a receiving channel and a transmitting channel is required. The traditional method for calibrating the transceiving channel generally adopts a mode of transceiving single-frequency signals to calibrate, and only the amplitude-phase error of a single frequency point can be calibrated each time. When the phased array antenna works in different frequency ranges, in order to ensure the amplitude and phase calibration precision, the calibration needs to be carried out again, and the precision is low. In addition, the conventional calibration of the transmitting channel requires an external connection line for auxiliary test, each transmitting channel is connected to one receiving channel, multiple signals are simultaneously transmitted and looped back to test the amplitude-phase error of the whole loop, and finally, the amplitude-phase error information of the transmitting channel is calculated according to the amplitude-phase error of the whole loop and the amplitude-phase error of the receiving channel, so that the operation is complex.
Disclosure of Invention
The invention aims to avoid the defects in the background technology and provides a multi-channel wide-band amplitude and phase calibration device for satellite communication.
In order to achieve the purpose, the invention adopts the technical scheme that:
a multi-channel broadband amplitude and phase calibration device for satellite communication comprises a controller, a power supply processing module, a multi-channel selector, a balancing module, an amplitude and phase error calculation module and a plurality of TR components, wherein the amplitude and phase error calculation module is connected with the balancing module, each TR component is connected with the balancing module through an up-conversion channel and a first down-conversion channel, and each first down-conversion channel is also connected with the amplitude and phase error calculation module; in addition, each TR component is also connected with the multiplexer, and the multiplexer is connected with the amplitude-phase error calculation module through a second down-conversion channel; each down-conversion channel comprises an analog-to-digital converter and a digital down-converter which are sequentially connected along the signal direction, and each up-conversion channel comprises a digital up-converter and a digital-to-analog converter which are sequentially connected along the signal direction;
when the amplitude-phase error of a receiving channel is calibrated, the TR component receives an externally input broadband calibration signal and outputs the broadband calibration signal to the analog-to-digital converter of the corresponding first down-conversion channel, and the digital signal is output to the corresponding digital down-converter after analog-to-digital conversion; the digital down converter down converts the received digital signal to a baseband and then transmits the digital signal in two paths: one path of signal is output to an amplitude-phase error calculation module, amplitude-phase errors among all receiving channels are calculated under the control of a controller, and amplitude-phase error information is sent to a balancing module; the other path of signal is directly output to the equalization module, and the equalization module corrects the amplitude and phase errors of the signals of each receiving channel according to the amplitude and phase error information sent by the amplitude and phase error calculation module; finally, the equalization module outputs the signals of all receiving channels with corrected amplitude phase errors;
when the amplitude and phase error calibration of the transmitting channel is carried out, firstly, the controller controls the equalizing module to output broadband signals to each digital up-converter, the digital up-converters output the up-converted signals to corresponding digital-to-analog converters, the digital-to-analog converters output the digital-to-analog converted signals to corresponding TR assemblies, the TR assemblies loop the transmitting signals back to the multi-channel selector through the transmitting and coupling channel, the multi-channel selector selects one channel of the coupled signals to output to an analog-to-digital converter in a second down-conversion channel according to control signals sent by the controller, the signals are output to a digital down-converter in the second down-conversion channel after the analog-to-digital conversion is finished, and the signals are output to the amplitude and phase error calculating module after the digital down-conversion, under the control of the controller, the amplitude and phase error of the transmitting channel is calculated, and the amplitude and phase error information is sent to the balancing module, and carrying out amplitude-phase correction on the transmitting signal in the balancing module according to the issued amplitude-phase error information and outputting the signal.
Furthermore, the amplitude and phase error calculation module comprises a control logic module, a data cache module, an FFT processing module, a frequency domain extraction module and a comparison and judgment module;
when the amplitude-phase error of the receiving channel is calibrated, the signal of each first down-conversion channel is output to an FFT processing module, and the FFT processing module carries out fast Fourier transform on each path of calibration signal to obtain the frequency spectrum of each path of signal and outputs the frequency spectrum data to a frequency domain extraction module; the controller determines each frequency point required to be subjected to amplitude-phase error test according to the actual working frequency band, and then transmits the frequency point information to the control logic module, and the control logic module forwards the frequency point information to the frequency domain extraction module; the frequency domain extraction module extracts frequency spectrum data of corresponding frequency points on the frequency spectrum of each path of received signals according to the frequency point information issued by the control logic module and outputs the extracted frequency spectrum data to the comparison and judgment module; the comparison and judgment module calculates the amplitude and phase of each frequency point in each channel according to the extracted frequency spectrum data, calculates the amplitude-phase error of each frequency point of each channel according to the calculated amplitude and phase information, judges the calculated amplitude-phase error information, uploads the information to the controller through the control logic module if the judgment is invalid, the controller issues an instruction, restarts the amplitude-phase error calculation flow of the receiving channel, and issues the information to the equalization module for correcting the inter-channel amplitude-phase error of the receiving signal if the judgment is valid;
when the amplitude-phase error of the transmitting channel is calibrated, the equalizing module internally generates linear frequency modulation signals for calibration and outputs the linear frequency modulation signals to the corresponding TR component through each up-conversion channel, and then the signals are output to the multiplexer from the transmitting-coupling channel of the TR component; the controller controls the multi-path selector to sequentially gate each path of the transmitting coupling channel, and the signal is output to the data cache module through the second down-conversion path during each gating; after all the channels of data are cached completely, outputting all the cached data to an FFT processing module for fast Fourier transform, determining each frequency point needing to calculate amplitude-phase errors by the controller according to the actual working frequency band, sending frequency point information to a frequency domain extraction module through a control logic module, extracting frequency spectrum data of corresponding frequency points on each channel of emission signal frequency spectrum in the frequency domain extraction module according to the frequency spectrum information, and sending the frequency spectrum data to a comparison and judgment module; the comparison and judgment module calculates the amplitude and phase of each frequency point of each channel according to the extracted frequency spectrum data, calculates the amplitude-phase error of each frequency point of each channel according to the calculated amplitude and phase information, judges the calculated amplitude-phase error information, uploads the information to the controller through the control logic module if the information is invalid, the controller issues an instruction, the amplitude-phase error calculation flow of the emission channel is restarted, and the information is issued to the equalization module if the information is valid and used for calibrating the amplitude-phase error between the channels of the emission signal.
Furthermore, the equalization module comprises a digital phase shifter, a gain control module, a two-way switch and a chirp signal generator;
for the receiving channels, the received signals of each channel sequentially pass through a digital phase shifter and a gain control module, and the amplitude-phase error calibration of each channel of receiving channels is completed according to the amplitude-phase error information sent by the amplitude-phase error calculation module;
for the transmitting channel, if the transmitting channel is in a calibration mode at present, the controller controls the two-way switch to switch the transmitting data source to the chirp signal generator so as to send a broadband chirp signal for calibration; if the current working mode is normal, the controller controls the two-way switch to switch the transmitting data source into data which needs to be transmitted actually, and the transmitting data of each channel sequentially passes through the gain control module and the digital phase shifter, so that amplitude-phase error calibration of each path of transmitting signals is completed.
Further, the device is realized based on an FPGA.
Compared with the background technology, the invention has the following advantages:
1. the invention adopts a digital signal processing technology to realize multi-channel amplitude and phase error detection and calibration, for a receiving channel, firstly, an external broadband calibration signal is received, frequency spectrum analysis is carried out on signals of each channel, each frequency point needing to detect the phase error is determined according to an actual working frequency band, and simultaneously, the amplitude and phase error information of each frequency point of each receiving channel is detected; for the transmitting channel, generating a linear frequency modulation signal for calibration according to the current actual working frequency band and the signal bandwidth so as to calibrate the transmitting channel. Compared with the traditional mode of calibrating the amplitude and phase errors among the channels by using single-tone signals, the method greatly reduces the complexity of operation and improves the real-time performance and reliability of calibration.
2. The digital phase shifter is adopted in the equalization module to replace an analog phase shifter adopted by the traditional analog phased array, and the method has the characteristics of high precision, high reliability, strong adaptability and the like.
3. When the invention processes the calibration of the transmitting channels, the broadband linear frequency modulation calibration signals of each transmitting channel are transmitted back to the interior of the equalizing module through the same loopback branch based on the multi-path selector, thereby greatly reducing the complexity of the equipment, avoiding manual connection when the transmitting channels are calibrated every time, and greatly improving the effectiveness and the usability of the amplitude-phase error calibration of the transmitting channels.
Drawings
FIG. 1 is an electrical schematic block diagram of an embodiment of the present invention.
Fig. 2 is an electrical schematic block diagram of a magnitude-phase error calculation module in an embodiment of the invention.
Fig. 3 is an electrical schematic block diagram of an equalization module in an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 3, a multi-channel wideband amplitude and phase calibration apparatus for satellite communication includes an ARM controller, a multiplexer, a power processing module, a balancing module, an amplitude and phase error calculation module, and a plurality of TR components, where the amplitude and phase error calculation module is connected to the balancing module, each TR component is connected to the balancing module through an up-conversion channel and a first down-conversion channel, and each first down-conversion channel is further connected to the amplitude and phase error calculation module; in addition, each TR component is also connected with the multiplexer, and the multiplexer is connected with the amplitude-phase error calculation module through a second down-conversion channel; each down-conversion channel comprises an analog-to-digital converter and a digital down-converter which are sequentially connected along the signal direction, and each up-conversion channel comprises a digital up-converter and a digital-to-analog converter which are sequentially connected along the signal direction. Fig. 1 is an electrical schematic block diagram of the present embodiment, which is connected to the circuit of fig. 1.
The TR component is used for receiving and transmitting electromagnetic wave signals and comprises a transmitting and coupling channel, and transmitting channel signals are coupled out from the channel for debugging and calibration. The analog-to-digital converters used in this example are commercially available AD9361 and all the digital-to-analog converters used are commercially available AD 9364. The embodiment also adopts a commercially available FPGA chip with XC7Z045 model number, the FPGA chip is packaged into ffg900, all digital up-conversion and digital down-conversion modules are manufactured by the DUC/DDC Compiler in the FPGA chip, and a single DUC/DDC Compiler supports digital up-conversion and digital down-conversion of 8-channel signals at most simultaneously; the ARM controller is manufactured by a dual-core Cortex-A9 chip embedded in an FPGA chip and is used for controlling and supervising the calibration process of the whole transceiving channel. The amplitude and phase error calculation module and the equalization module are realized in the FPGA, the power supply processing module is manufactured by adopting a commercially available switching power supply regulator PTH05000, a linear voltage stabilizer LT1764EQ-1.8 and an LT1764EQ-3.3, and the power supply processing module is used for providing direct-current working voltage for all levels of parts.
The amplitude and phase error calculation module mainly has the following functions: and calculating amplitude and phase error information of 16 receiving channels, calculating amplitude and phase error information of 16 transmitting channels, and judging a calculation result. The device comprises a control logic module, a data caching module, an FFT processing module, a frequency domain extraction module and a comparison and judgment module. Fig. 2 is an electrical schematic block diagram of an amplitude-phase error calculation module, an embodiment of which is connected in the relationship of fig. 2. The control logic module is made of a configurable logic unit CLB in the FPGA and is used for data interaction with the ARM controller, and the control logic module is equivalent to a data transfer station. The data buffer module is made of an FIFO Generator inside the FPGA chip and is used for buffering the linear frequency modulation calibration signals received from the transmitting and coupling channel. The FFT processing module is made of LTE Fast Fourier Transform inside the FPGA and is used for converting the broadband signals into frequency domains for subsequent amplitude-phase error calculation. The frequency domain extraction module is manufactured based on a configurable logic unit CLB in the FPGA and is used for extracting frequency spectrum data of each frequency point of each channel according to frequency point information sent by the ARM controller. The comparison and judgment module is made by a configurable logic unit CLB in the FPGA and is used for calculating the amplitude-phase error of each receiving and transmitting channel according to the extracted frequency spectrum data and judging the calculation result of the amplitude-phase error among the channels, if the judgment result is wrong, the abnormal information is reported to an ARM controller through the control logic module, the amplitude-phase error calibration process is restarted, and if the judgment result is correct, the amplitude-phase error information is sent to the balance module.
The equalization module mainly functions to calibrate amplitude and phase errors of the 16 paths of receiving channel signals, calibrate amplitude and phase errors of the 16 paths of transmitting channel signals and generate linear frequency modulation broadband calibration signals. The device comprises a digital phase shifter, a gain control module, a two-way switch and a linear frequency modulation signal generator. Fig. 3 is an electrical schematic block diagram of an equalization module, an embodiment of which is connected in the relationship of fig. 3. The chirp generator is made by a configurable logic unit inside the FPGA in combination with the DSP48E, and can set the bandwidth and chirp rate of the chirp according to the actual operating bandwidth. The two-way switch is made by a configurable logic unit CLB in the FPGA, if the current mode is a calibration mode, the data source is switched to a linear frequency modulation signal generator under an ARM controller, and if the current mode is a normal working mode, the data source is switched to a signal needing to be transmitted. The gain control module is made of a configurable logic unit CLB and a DSP48E in the FPGA, the gain of the gain control module is 1 by default, which is equivalent to a direct-through mode, and when the gain control module works actually, the signal gain of each current transceiving channel is determined according to the center frequency of the current working bandwidth and the amplitude error information between the channels sent by the amplitude and phase error calculation module. The digital phase shifter module is manufactured by an IP core of CORDIC inside FPGA, the default phase shift value of the digital phase shifter is 0, which is equivalent to a direct mode, and when the digital phase shifter module works actually, the phase shift value of each current transceiving channel is determined according to the center frequency of the current working bandwidth and the phase error information between the channels sent by the amplitude-phase error calculation module, so that the phase calibration between the channels is realized.
The simple working principle of the device is as follows:
setting the signal output by the linear frequency modulation signal generator as U1(t)：
Wherein U is1For signal amplitude, k is the chirp rate, T is the pulse width, f0For the start frequency, the signal bandwidth B ═ kT, rect (T/T) is a rectangular signal:
linear frequency modulated signal U1(t) the signals are output from the equalization module 11, and are output to the transmitting channels of 16 paths of TR components after digital up-conversion and analog-to-digital conversion, then under the control of an ARM controller, the data channels between the transmitting coupling channels and the multi-path selector of each TR component are sequentially gated, and after the signals are subjected to analog-to-digital converter and digital down-conversion, the calibration signals of the 16 paths of transmitting channels are sequentially output to a data cache module, and 16 paths of signals in the data cache module are:
wherein A isiFor the amplitude, τ, of the channel signal received by the i-th pathiIs the time delay of the ith receiving channel, k is the frequency modulation slope, T is the pulse width, f0Is the starting frequency.
The 16-path linear frequency modulation signals in the data cache module sequentially pass through the FFT frequency spectrum processing module and the frequency domain extraction module to obtain frequency spectrum data of each frequency point of 16 channels:
wherein, Fw (i, n) is the frequency spectrum data of the ith signal and the nth frequency point.
The frequency domain extraction module outputs the extracted frequency spectrum data to the comparison and judgment module, and other 15 paths of signals use the 1 st path of signal as reference, and calculate the amplitude and phase error between the signals and the first path of signal to obtain corresponding amplitude and phase error data:
and E (k, n) is a complex number, the modulus value represents an amplitude error, and the phase value represents a phase error.
And the amplitude and phase error calculation module sends the calculated amplitude and phase error information to the balancing module. In the equalization module, an ARM controller controls a two-way switch to switch a data source to transmit data, and the ith actual transmission signal is set to be X1i(t), output signal X2 of the gain control modulei(t) is:
X2i(t)＝X1i(t)×|E(i,n)| (6)
and E (i, n) is the amplitude-phase error of the ith signal and the 1 st signal at the nth frequency point, and the value of n is determined by the actual working bandwidth of the transmitting channel.
Output signal X2 of gain control modulei(t) passing through a digital phase shifter to obtain a phase-corrected signal X3i(t)：
X3i(t)＝X2i(t)×ej(angle(E(i,n))) (7)
And E (i, n) is the amplitude-phase error of the ith signal and the 1 st signal at the nth frequency point, and the value of n is determined by the actual working bandwidth of the transmitting channel.
I path transmitting signal X3 for completing amplitude and phase error calibrationiAnd (t) after digital up-conversion and digital-to-analog conversion, finally outputting to a TR component and transmitting. The calibration procedure of the receiving channel is different from the calibration procedure of the transmitting channel in that the linearity for calibration is directly received by the TR component during the calibration of the receiving channelFrequency modulation signals and other work flows are completely consistent.
The installation structure of the device is as follows: all circuit components are attached to a 12-layer printed board with the length multiplied by the width of 200 multiplied by 180 mm on two sides, the top layer and the bottom layer are signal layers, the components are installed, the middle layer is a six-layer inner electric layer and four signal layers, and the six-layer inner electric layer comprises four large-area grounding layers with digital and analog separation and two isolated power supply layers. In order to avoid cross-talk of signals between channels through power supplies, particularly an AD9361 frequency agile converter, each chip power supply is provided separately. The embodiment adopts the installation of upper and lower shielding box bodies, except the cavity isolation design in the radio frequency signal area, on the FPGA and the power chip with large heat quantity in the upper layer, the structure design of the embedded heat pipe and the radiating fin is combined to form good conduction and radiation; the structure can realize the spatial isolation of electromagnetic signals, facilitates the nearby grounding end of radio-frequency signals, avoids the mutual interference of the radio-frequency signals in the box body, can efficiently conduct the local heat of the chip to the whole box body, and dissipates the heat outwards through the dense fins.
The invention can realize high-precision calibration of amplitude and phase errors among a plurality of digital channels in the whole working frequency band, thereby laying a foundation for multi-channel digital beam control and array signal processing. The device can realize the amplitude and phase error calibration function of the receiving channel and the transmitting channel. The receiving channel calibration is to send 16 paths of calibration signals to an amplitude-phase error calculation module through a TR component, an analog-to-digital converter and a digital down-conversion module, calculate the amplitude-phase error of each receiving channel under the control of an ARM (advanced RISC machine), and send the calculated amplitude-phase error to a balancing module to calibrate the amplitude-phase error of the received signals; the calibration process of the transmitting channel is that the TR component transmitting-coupling channel outputs a calibration signal to the amplitude-phase error calculation module through the multiplexer, the analog-to-digital converter and the digital down-conversion. Different from the receiving channel, the transmitting channel can only control the multiplexer to transmit one path of calibration signal to the amplitude-phase error calculation module and buffer by the ARM each time, starts to calculate the amplitude-phase error between the channels after receiving all 16 paths of calibration signals, and sends the calculation result to the balancing module. Compared with the commonly applied single-tone signal calibration, the calibration algorithm based on the broadband Linear Frequency Modulation (LFM) signal is adopted, the calibration method can conveniently realize the functions of calibrating the amplitude and phase errors of the broadband and the multichannel in a digital domain, and has the characteristics of high integration degree, simple structure, high reliability, convenience in scale expansion and the like.
Claims (3)
1. A multi-channel broadband amplitude and phase calibration device for satellite communication is characterized by comprising a controller, a power supply processing module, a multi-channel selector, a balancing module, an amplitude and phase error calculation module and a plurality of TR components, wherein the amplitude and phase error calculation module is connected with the balancing module, each TR component is connected with the balancing module through an up-conversion channel and a first down-conversion channel, and each first down-conversion channel is also connected with the amplitude and phase error calculation module; in addition, each TR component is also connected with the multiplexer, and the multiplexer is connected with the amplitude-phase error calculation module through a second down-conversion channel; each down-conversion channel comprises an analog-to-digital converter and a digital down-converter which are sequentially connected along the signal direction, and each up-conversion channel comprises a digital up-converter and a digital-to-analog converter which are sequentially connected along the signal direction;
when the amplitude-phase error of a receiving channel is calibrated, the TR component receives an externally input broadband calibration signal and outputs the broadband calibration signal to the analog-to-digital converter of the corresponding first down-conversion channel, and the digital signal is output to the corresponding digital down-converter after analog-to-digital conversion; the digital down converter down converts the received digital signal to a baseband and then transmits the digital signal in two paths: one path of signal is output to an amplitude-phase error calculation module, amplitude-phase errors among all receiving channels are calculated under the control of a controller, and amplitude-phase error information is sent to a balancing module; the other path of signal is directly output to the equalization module, and the equalization module corrects the amplitude and phase errors of the signals of each receiving channel according to the amplitude and phase error information sent by the amplitude and phase error calculation module; finally, the equalization module outputs the signals of all receiving channels with corrected amplitude phase errors;
when the amplitude and phase error calibration of the transmitting channel is carried out, firstly, the controller controls the equalizing module to output broadband signals to each digital up-converter, the digital up-converters output the up-converted signals to corresponding digital-to-analog converters, the digital-to-analog converters output the digital-to-analog converted signals to corresponding TR assemblies, the TR assemblies loop the transmitting signals back to the multi-channel selector through the transmitting and coupling channel, the multi-channel selector selects one channel of the coupled signals to output to an analog-to-digital converter in a second down-conversion channel according to control signals sent by the controller, the signals are output to a digital down-converter in the second down-conversion channel after the analog-to-digital conversion is finished, and the signals are output to the amplitude and phase error calculating module after the digital down-conversion, under the control of the controller, the amplitude-phase error of the transmitting channel is calculated, and the amplitude-phase error information is sent to the balancing module, carrying out amplitude-phase correction on the transmitting signal in the equalizing module according to the issued amplitude-phase error information and outputting the signal;
the amplitude and phase error calculation module comprises a control logic module, a data cache module, an FFT processing module, a frequency domain extraction module and a comparison and judgment module;
when the amplitude-phase error of the receiving channel is calibrated, the signal of each first down-conversion channel is output to an FFT processing module, and the FFT processing module carries out fast Fourier transform on each path of calibration signal to obtain the frequency spectrum of each path of signal and outputs the frequency spectrum data to a frequency domain extraction module; the controller determines each frequency point required to be subjected to amplitude-phase error test according to the actual working frequency band, and then transmits the frequency point information to the control logic module, and the control logic module forwards the frequency point information to the frequency domain extraction module; the frequency domain extraction module extracts frequency spectrum data of corresponding frequency points on each channel of received signal frequency spectrum according to the frequency point information issued by the control logic module, and outputs the extracted frequency spectrum data to the comparison and judgment module; the comparison and judgment module calculates the amplitude and phase of each frequency point in each channel according to the extracted frequency spectrum data, calculates the amplitude-phase error of each frequency point of each channel according to the calculated amplitude and phase information, judges the calculated amplitude-phase error information, uploads the information to the controller through the control logic module if the judgment is invalid, the controller issues an instruction, the amplitude-phase error calculation flow of the receiving channel is restarted, and if the judgment is valid, the information is issued to the equalization module for correcting the inter-channel amplitude-phase error of the receiving signal;
when the amplitude-phase error of the transmitting channel is calibrated, the equalizing module internally generates linear frequency modulation signals for calibration and outputs the linear frequency modulation signals to the corresponding TR component through each up-conversion channel, and then the signals are output to the multiplexer from the transmitting-coupling channel of the TR component; the controller controls the multi-path selector to sequentially gate each path of the transmitting coupling channel, and the signal is output to the data cache module through the second down-conversion path during each gating; after all the channels of data are cached completely, outputting all the cached data to an FFT processing module for fast Fourier transform, determining each frequency point needing to calculate amplitude-phase errors by the controller according to the actual working frequency band, sending frequency point information to a frequency domain extraction module through a control logic module, extracting frequency spectrum data of corresponding frequency points on each channel of emission signal frequency spectrum in the frequency domain extraction module according to the frequency spectrum information, and sending the frequency spectrum data to a comparison and judgment module; the comparison and judgment module calculates the amplitude and phase of each frequency point of each channel according to the extracted frequency spectrum data, calculates the amplitude-phase error of each frequency point of each channel according to the calculated amplitude and phase information, judges the calculated amplitude-phase error information, uploads the information to the controller through the control logic module if the information is invalid, the controller issues an instruction, the amplitude-phase error calculation flow of the emission channel is restarted, and the information is issued to the equalization module if the information is valid and used for calibrating the amplitude-phase error between the channels of the emission signal.
2. The multi-channel wideband amplitude and phase calibration apparatus for satellite communications according to claim 1, wherein the equalization module comprises a digital phase shifter, a gain control module, a two-way switch, and a chirp signal generator;
for the receiving channels, the received signals of each channel sequentially pass through a digital phase shifter and a gain control module, and the amplitude-phase error calibration of each channel of receiving channels is completed according to the amplitude-phase error information sent by the amplitude-phase error calculation module;
for the transmitting channel, if the transmitting channel is in a calibration mode at present, the controller controls the two-way switch to switch the transmitting data source to the chirp signal generator so as to send a broadband chirp signal for calibration; if the current working mode is normal, the controller controls the two-way switch to switch the transmitting data source into data which needs to be transmitted actually, and the transmitting data of each channel sequentially passes through the gain control module and the digital phase shifter, so that amplitude-phase error calibration of each path of transmitting signals is completed.
3. The multi-channel wideband amplitude and phase calibration apparatus for satellite communication according to claim 2, wherein the apparatus is implemented based on FPGA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011213869.6A CN112350751B (en) | 2020-11-04 | 2020-11-04 | Multi-channel wide-band amplitude and phase calibration device for satellite communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011213869.6A CN112350751B (en) | 2020-11-04 | 2020-11-04 | Multi-channel wide-band amplitude and phase calibration device for satellite communication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112350751A CN112350751A (en) | 2021-02-09 |
| CN112350751B true CN112350751B (en) | 2022-07-08 |
Family
ID=74356417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011213869.6A Active CN112350751B (en) | 2020-11-04 | 2020-11-04 | Multi-channel wide-band amplitude and phase calibration device for satellite communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112350751B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824491B (en) * | 2021-11-22 | 2022-01-21 | 中国人民解放军海军工程大学 | Ku/Ka dual-band satellite-communication ground station-oriented multi-frequency-point interference sampling circuit and method |
| CN116743170B (en) * | 2023-08-16 | 2023-10-13 | 南京芯惠半导体有限公司 | Multichannel analog-to-digital converter and calibration method thereof |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349741A (en) * | 2008-08-29 | 2009-01-21 | 西安电子科技大学 | Phased array digital multi-beam forming machine for electron reconnaissance |
| CN101957444A (en) * | 2010-09-30 | 2011-01-26 | 中国船舶重工集团公司第七二三研究所 | Multichannel radar amplitude and phase automatic correcting method and device |
| CN101964449A (en) * | 2010-08-27 | 2011-02-02 | 中国科学院上海微系统与信息技术研究所 | On-track correcting device of space-borne phased array transmitting antenna |
| CN103117781A (en) * | 2013-02-01 | 2013-05-22 | 华中科技大学 | Method and device for antenna array calibration under complex electromagnetic environment |
| CN103391123A (en) * | 2013-07-25 | 2013-11-13 | 中国科学院上海微系统与信息技术研究所 | Satellite-borne multi-beam receiving antenna correction system and method |
| CN104297738A (en) * | 2014-11-13 | 2015-01-21 | 中国科学院电子学研究所 | Synchronization calibration device and synchronization calibration and error compensation method for multi-channel receiver |
| CN104316913A (en) * | 2014-11-13 | 2015-01-28 | 中国科学院电子学研究所 | Multichannel receiver real-time calibration device and calibration and error compensation method |
| CN107315183A (en) * | 2017-06-01 | 2017-11-03 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The calibration method of aeronautical satellite array antenna received system |
| CN110149157A (en) * | 2018-02-11 | 2019-08-20 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Array antenna wideband channel parallel calibration method |
| CN110531325A (en) * | 2019-07-30 | 2019-12-03 | 中国人民解放军91550部队 | Digital if receiver and method for monopulse radar |
| CN209897046U (en) * | 2019-06-21 | 2020-01-03 | 成都九洲迪飞科技有限责任公司 | Small phased array digital radio frequency subsystem |
| CN110808794A (en) * | 2019-11-05 | 2020-02-18 | 中国电子科技集团公司第二十研究所 | Large-scale phased array calibration system based on dual-channel calibration circuit and control method |
| CN111245529A (en) * | 2020-04-09 | 2020-06-05 | 成都坤恒顺维科技股份有限公司 | Phase calibration method of digital phased array antenna and phased array antenna |
| CN111638494A (en) * | 2020-05-31 | 2020-09-08 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Multi-channel amplitude and phase correction method for digital beam synthesis system |
| CN111726173A (en) * | 2020-06-29 | 2020-09-29 | 中国电子科技集团公司第五十四研究所 | Internal calibration system and method for transmitting-receiving duplex phased array antenna |
-
2020
- 2020-11-04 CN CN202011213869.6A patent/CN112350751B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349741A (en) * | 2008-08-29 | 2009-01-21 | 西安电子科技大学 | Phased array digital multi-beam forming machine for electron reconnaissance |
| CN101964449A (en) * | 2010-08-27 | 2011-02-02 | 中国科学院上海微系统与信息技术研究所 | On-track correcting device of space-borne phased array transmitting antenna |
| CN101957444A (en) * | 2010-09-30 | 2011-01-26 | 中国船舶重工集团公司第七二三研究所 | Multichannel radar amplitude and phase automatic correcting method and device |
| CN103117781A (en) * | 2013-02-01 | 2013-05-22 | 华中科技大学 | Method and device for antenna array calibration under complex electromagnetic environment |
| CN103391123A (en) * | 2013-07-25 | 2013-11-13 | 中国科学院上海微系统与信息技术研究所 | Satellite-borne multi-beam receiving antenna correction system and method |
| CN104316913A (en) * | 2014-11-13 | 2015-01-28 | 中国科学院电子学研究所 | Multichannel receiver real-time calibration device and calibration and error compensation method |
| CN104297738A (en) * | 2014-11-13 | 2015-01-21 | 中国科学院电子学研究所 | Synchronization calibration device and synchronization calibration and error compensation method for multi-channel receiver |
| CN107315183A (en) * | 2017-06-01 | 2017-11-03 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The calibration method of aeronautical satellite array antenna received system |
| CN110149157A (en) * | 2018-02-11 | 2019-08-20 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Array antenna wideband channel parallel calibration method |
| CN209897046U (en) * | 2019-06-21 | 2020-01-03 | 成都九洲迪飞科技有限责任公司 | Small phased array digital radio frequency subsystem |
| CN110531325A (en) * | 2019-07-30 | 2019-12-03 | 中国人民解放军91550部队 | Digital if receiver and method for monopulse radar |
| CN110808794A (en) * | 2019-11-05 | 2020-02-18 | 中国电子科技集团公司第二十研究所 | Large-scale phased array calibration system based on dual-channel calibration circuit and control method |
| CN111245529A (en) * | 2020-04-09 | 2020-06-05 | 成都坤恒顺维科技股份有限公司 | Phase calibration method of digital phased array antenna and phased array antenna |
| CN111638494A (en) * | 2020-05-31 | 2020-09-08 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Multi-channel amplitude and phase correction method for digital beam synthesis system |
| CN111726173A (en) * | 2020-06-29 | 2020-09-29 | 中国电子科技集团公司第五十四研究所 | Internal calibration system and method for transmitting-receiving duplex phased array antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112350751A (en) | 2021-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11522501B2 (en) | Phased array amplifier linearization | |
| CN112350751B (en) | Multi-channel wide-band amplitude and phase calibration device for satellite communication | |
| JP5933471B2 (en) | Phased array transmitter | |
| CN103391123B (en) | Satellite-borne multi-beam receiving antenna correction system and correction method thereof | |
| CN102273097B (en) | Calibration apparatus and method | |
| CN108562880B (en) | Internal calibration network unit and internal calibration method of reflector spaceborne SAR system | |
| US8432997B2 (en) | Method and system of beamforming a broadband signal through a multiport network | |
| KR20150105235A (en) | Apparatus and method for antenna array self-calibration | |
| WO2013123753A1 (en) | Device and method for synchronously calibrating multi-transmitting/receiving channel of active antenna | |
| WO2011097651A1 (en) | Method and system of beamforming a broadband signal through a multiport network | |
| CN105467371A (en) | Amplitude phase calibrating device for semi-closed loop coupled phased array channels | |
| KR20030034259A (en) | Apparatus for Calibration in Adaptive Array Antenna and Method Thereof | |
| CN100550673C (en) | The calibrating installation of array communication system receiving chain and method | |
| KR20120034811A (en) | Apparatus for calibrating radiofrequency paths of a phased-array antenna | |
| CN114185008A (en) | System and method for compensating amplitude-phase error of receiving channel of narrow-band digital array radar system | |
| CN112804016B (en) | Self-calibration method for broadband phased array antenna of analog-digital hybrid transceiver shared system | |
| US7088173B1 (en) | Adjustable multiport power/phase method and system with minimum phase error | |
| CN114185017B (en) | Method for controlling amplitude-phase error of active feed of azimuth multi-channel antenna | |
| CN107994959B (en) | Method and device for detecting standing-wave ratio of remote radio unit RRU | |
| CN116405352A (en) | System for improving power amplification efficiency of distributed antenna and calibration method thereof | |
| CN114185016B (en) | Method for measuring and compensating amplitude-phase error between channels of multi-channel satellite-borne SAR (synthetic aperture radar) antenna | |
| CN113014294B (en) | Two-dimensional phased array microwave front end calibration network and method | |
| CN105897351A (en) | Uplink and downlink wave beam shaping measure system and method | |
| Fischer et al. | Development of a high-resolution wide-swath SAR demonstrator | |
| KR20070060818A (en) | Rf signal coupling and dividing device for error correction, transmitting/receiving apparatus of smart antenna system using the device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |