CN219938367U - Signal phase compensating device and phased array - Google Patents
Signal phase compensating device and phased array Download PDFInfo
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Abstract
The utility model relates to the technical field of communication, in particular to a signal phase compensation device and a phased array, which aim to solve the problem of efficiently and accurately compensating the phase of a signal. The device provided by the utility model comprises a first phase shifter, a quadrature coupler, a quadrature modulator and a voltage acquirer; the quadrature coupler is used for acquiring a first in-phase signal and a first quadrature signal of a first path of signals and a second in-phase signal and a second quadrature signal of a second path of signals; the quadrature modulator is used for quadrature modulating the first in-phase signal, the second in-phase signal and the first quadrature signal and the second quadrature signal; the voltage acquirer is used for acquiring a phase compensation control voltage according to the quadrature modulation signal; the first phase shifter is used for respectively carrying out phase compensation on the first path of signal and the second path of signal according to the phase compensation control voltage. Based on the device, the phase compensation control voltage can be accurately obtained before the phase compensation is carried out, and the phase compensation can be rapidly and accurately completed according to the phase compensation control voltage.
Description
Technical Field
The utility model relates to the technical field of communication, in particular to a signal phase compensation device and a phased array.
Background
When signals transmitted by a signal source are received by a device (such as an array antenna) with a plurality of signal channels, the signals received by the channels are added to obtain a final received signal, and the frequencies of the signals are the same. However, since the transmission paths of the signals received by the channels are different, a certain phase difference exists between the signals, and if the signals with the phase difference are directly added, the accuracy of the final received signal is greatly affected. Therefore, before adding the signals, the phase compensation is performed on each signal so that the phases of the signals are consistent, and then the signals with the phase compensation are added, and at this time, the signal strength of the added signal reaches the maximum value.
However, the conventional signal phase compensation device at present cannot accurately acquire the phase difference between the signals of all paths and perform phase compensation according to the phase difference, and only perform feedback control on the phase compensation of the signals of all paths according to the signal strength of the summation signal, until the signal strength of the summation signal reaches the maximum value, the phase compensation is stopped, and long time is required to be spent to complete the phase compensation, so that the communication efficiency is affected.
Accordingly, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
The present utility model has been made to overcome the above-mentioned drawbacks, and provides a signal phase compensation device and a phased array which solve or at least partially solve the technical problem of how to efficiently and accurately phase compensate a signal.
In a first aspect, a signal phase compensation apparatus is provided, the apparatus comprising a voltage acquisition component and a first phase shifter, the voltage acquisition component comprising a quadrature coupler, a quadrature modulator and a voltage acquisition device connected in sequence; the quadrature coupler is used for acquiring a first in-phase signal and a first quadrature signal which are respectively identical and quadrature to the phase of the first path of signal, and acquiring a second in-phase signal and a second quadrature signal which are respectively identical and quadrature to the phase of the second path of signal; the quadrature modulator is used for carrying out quadrature modulation on the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal so as to obtain quadrature modulation signals; the voltage acquirer is used for acquiring phase compensation control voltages of the first path of signals and the second path of signals according to the quadrature modulation signals; the first phase shifter is used for respectively carrying out phase compensation on the first path of signal and the second path of signal according to the phase compensation control voltage of the first path of signal and the second path of signal.
In one aspect of the above signal phase compensation device, the quadrature coupler includes: the first quadrature coupling module is used for acquiring a first in-phase signal and a first quadrature signal which are respectively identical and quadrature with the phase of the first path of signal; and the second quadrature coupling module is used for acquiring a second in-phase signal and a second quadrature signal which are respectively identical and quadrature with the phase of the second path signal.
In one aspect of the above signal phase compensation apparatus, the quadrature modulator includes: a first multiplier for multiplying the first in-phase signal and the second quadrature signal to obtain a first modulated signal; a second multiplier for multiplying the second in-phase signal with the first quadrature signal to obtain a second modulated signal; and a subtractor for subtracting the first modulation signal from the second modulation signal to obtain a quadrature modulation signal.
In one aspect of the above signal phase compensation device, the voltage acquisition component further includes a first amplifier connected to the quadrature coupler and the quadrature modulator, respectively; the first amplifier is used for respectively amplifying the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal; the quadrature modulator is further configured to perform quadrature modulation on the first inphase signal, the first quadrature signal, the second inphase signal, and the second quadrature signal after signal amplification, so as to obtain a quadrature modulated signal.
In one aspect of the signal phase compensation device, the number of the first amplifiers is four, and each of the first amplifiers is configured to amplify a first in-phase signal, a first quadrature signal, a second in-phase signal, and a second quadrature signal.
In one aspect of the above signal phase compensation device, the voltage acquirer includes: a direct current component acquisition module for acquiring a direct current component in the quadrature modulated signal; the voltage acquirer is also used for respectively acquiring phase compensation control voltages of the first path of signals and the second path of signals according to the direct current component.
In one aspect of the foregoing signal phase compensation apparatus, the direct current component obtaining module includes a low-pass filter, and the low-pass filter is configured to perform low-pass filtering on the quadrature modulated signal to obtain the direct current component.
In one technical scheme of the signal phase compensation device, the direct current component acquisition module further comprises a first direct current unit and a second direct current unit; the first direct current unit is used for acquiring a direct current component corresponding to the first path of signal based on a preset proportion corresponding to the first path of signal and according to the direct current component; the second direct current unit is used for acquiring a direct current component corresponding to the second path of signal based on a preset proportion corresponding to the second path of signal and according to the direct current component; the voltage acquirer is also used for acquiring the phase compensation control voltage of the first path of signal according to the direct current component corresponding to the first path of signal and acquiring the phase compensation control voltage of the second path of signal according to the direct current component corresponding to the second path of signal; wherein, the sum of the preset proportion corresponding to each of the first path of signals and the second path of signals is 1.
In one aspect of the above signal phase compensation device, the voltage acquisition assembly further includes a second amplifier connected to the dc component acquisition module; the second amplifier is used for amplifying the direct current component acquired by the direct current component acquisition module; the voltage acquirer is also used for respectively acquiring phase compensation control voltages of the first path of signals and the second path of signals according to the amplified direct current component.
In one aspect of the above signal phase compensation apparatus, the apparatus further includes a second phase shifter connected to the voltage acquisition component; the voltage acquisition component is further used for acquiring phase compensation control voltages of the first path of signals and the second path of signals according to the first path of signals and the second path of signals after phase compensation, and outputting the acquired phase compensation control voltages to the second phase shifter; the second phase shifter is used for respectively carrying out phase compensation on the first path of signals and the second path of signals after phase compensation according to the re-acquired phase compensation control voltage.
In one aspect of the signal phase compensation device, the device further includes a third amplifier connected to the voltage acquisition component and the second phase shifter, respectively; the third amplifier is used for amplifying the re-acquired phase compensation control voltage and outputting the amplified phase compensation control voltage to the second phase shifter; the second phase shifter is further used for respectively carrying out phase compensation on the first path of signals and the second path of signals after phase compensation according to the amplified phase compensation control voltage; the gain of the third amplifier is the inverse of a preset gain product, and the preset gain product is the product of the corresponding gains of the voltage acquisition component and the second phase shifter.
In a second aspect, there is provided a phased array comprising:
a plurality of phase shifters; a control device for respectively controlling each phase shifter to perform phase compensation on signals received by each antenna in the array antenna, wherein the control device comprises the signal phase compensation device provided by the first aspect; and the signal adder is used for carrying out signal superposition on the signals received by each path of antenna after the phase compensation and outputting the signals.
The technical scheme provided by the utility model has at least one or more of the following beneficial effects:
in the technical scheme for implementing the signal phase compensation device provided by the utility model, the device comprises a voltage acquisition component and a first phase shifter, wherein the voltage acquisition component comprises a quadrature coupler, a quadrature modulator and a voltage acquirer which are sequentially connected. Specifically, the quadrature coupler may be configured to acquire a first in-phase signal and a first quadrature signal that are respectively identical and quadrature to a phase of the first path signal, and acquire a second in-phase signal and a second quadrature signal that are respectively identical and quadrature to a phase of the second path signal; the quadrature modulator may be configured to quadrature modulate the first in-phase signal, the first quadrature signal, the second in-phase signal, and the second quadrature signal to obtain a quadrature modulated signal; the voltage acquirer can be used for respectively acquiring phase compensation control voltages of the first path of signals and the second path of signals according to the quadrature modulation signals; the first phase shifter may be configured to perform phase compensation on the first signal and the second signal according to the phase compensation control voltages of the first signal and the second signal. Based on the structure, the phase compensation control voltage which can accurately acquire the voltage phase and can represent the phase difference between the first path of signal and the second path of signal before the phase compensation is carried out can rapidly and accurately complete the phase compensation according to the phase compensation control voltage, and the defect that the prior art needs to take a long time to complete the phase compensation is overcome.
In the technical scheme of implementing the phased array of the utility model, the phased array can comprise a plurality of phase shifters, a control device and a signal adder, and the control device can comprise the signal phase compensation device. Specifically, the control device may be configured to control the phase shifters to perform phase compensation on signals received by the antennas in the array antenna, and the signal adder may be configured to perform signal addition on signals received by the antennas after the phase compensation and output the signals. Based on the phased array, the phase compensation efficiency of the received signals of the array antenna can be improved, and the communication efficiency and the communication reliability of the array antenna are further improved.
Drawings
The present disclosure will become more readily understood with reference to the accompanying drawings. As will be readily appreciated by those skilled in the art: the drawings are for illustrative purposes only and are not intended to limit the scope of the present utility model. Wherein:
fig. 1 is a schematic diagram of the main structure of a signal phase compensation apparatus according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the main structure of a quadrature coupler according to one embodiment of the present utility model;
fig. 3 is a main structural diagram of a quadrature modulator according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a signal phase difference detection principle according to one embodiment of the present utility model;
FIG. 5 is a schematic diagram 1 of the principle of signal phase compensation according to one embodiment of the utility model;
FIG. 6 is a schematic diagram of signal phase compensation principles of FIG. 2 according to one embodiment of the utility model;
FIG. 7 is a schematic diagram of signal phase compensation principle 3 according to one embodiment of the present utility model;
FIG. 8 is a schematic diagram of signal phase compensation principles of FIG. 4 according to one embodiment of the utility model;
FIG. 9 is a schematic diagram 1 of the signal phase compensation effect according to one embodiment of the present utility model;
FIG. 10 is a schematic diagram of signal phase compensation effects 2 according to one embodiment of the utility model;
FIG. 11 is a schematic diagram of signal phase compensation effects 3 according to one embodiment of the utility model;
FIG. 12 is a schematic diagram 5 of the principle of signal phase compensation according to one embodiment of the utility model;
fig. 13 is a schematic diagram of the main structure of a phased array according to one embodiment of the utility model.
Detailed Description
Some embodiments of the utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.
In the description of the utility model, the term "a and/or B" means all possible combinations of a and B, such as a alone, B alone or a and B. The term "at least one A or B" or "at least one of A and B" has a meaning similar to "A and/or B" and may include A alone, B alone or A and B. The singular forms "a", "an" and "the" include plural referents.
Referring to fig. 1, fig. 1 is a schematic diagram of a main structure of a signal phase compensation apparatus according to an embodiment of the present utility model. As shown in fig. 1, the signal phase compensation device in the embodiment of the present utility model mainly includes a voltage acquisition component and a first phase shifter, where the voltage acquisition component includes a quadrature coupler, a quadrature modulator, and a voltage acquirer that are sequentially connected, and the quadrature coupler, the quadrature modulator, the voltage acquirer, and the first phase shifter are described below.
1. Orthogonal coupler
The quadrature coupler may be configured to acquire a first in-phase signal and a first quadrature signal that are respectively identical and quadrature to a phase of the first path signal, and to acquire a second in-phase signal and a second quadrature signal that are respectively identical and quadrature to a phase of the second path signal.
The first signal and the second signal are electric signals with the same signal frequency, and the first signal and the second signal can be low-frequency signals (such as signals with signal frequency smaller than or equal to a set threshold value) or high-frequency signals (such as signals with signal frequency larger than the set threshold value). In some embodiments, the first and second signals may be electrical signals converted from millimeter wave (millimeter wave) signals, where the electromagnetic wave frequency of the millimeter wave signals is typically between 30GHz and 300GHz, which are high frequency signals. Wherein the signal frequency of the electric signal converted from the millimeter wave signal is the same as the electromagnetic wave frequency of the millimeter wave signal, and therefore the electric signal converted from the millimeter wave signal is still a high frequency signal. In some embodiments, the first and second signals may be electrical signals converted from radio frequency signals, and the signal frequency of the electrical signals is equal to the signal frequency of the radio frequency signals.
The phase difference between the first quadrature signal and the first path signal is the same as the phase difference between the second quadrature signal and the second path signal. In some embodiments, a signal that is 90 ° out of phase with the first signal may be acquired as a first quadrature signal, and a signal that is 90 ° out of phase with the second signal may be acquired as a second quadrature signal. In some embodiments, a signal having a phase difference of 270 ° from the first signal may be obtained as the first orthogonal signal, and a signal having a phase difference of 270 ° from the second signal may be obtained as the second orthogonal signal.
It should be noted that, a person skilled in the art may construct the quadrature coupler by using an electronic device that is conventional in the technical field of electronic devices, and configure the function of the quadrature coupler by using a conventional implementation method, such as a software method, in the technical field of signal processing, so long as the quadrature coupler can obtain a first in-phase signal and a first quadrature signal that are the same as and are orthogonal to the first path of signal, and obtain a second in-phase signal and a second quadrature signal that are the same as and are orthogonal to the second path of signal, which are the same as and are orthogonal to the second path of signal, and the embodiment of the present utility model does not specifically define the type and model of the device used by the quadrature coupler, or does not specifically define the implementation method of the function of the quadrature coupler.
2. Quadrature modulator
The quadrature modulator may be configured to quadrature modulate the first in-phase signal, the first quadrature signal, the second in-phase signal, and the second quadrature signal to obtain a quadrature modulated signal. By quadrature modulating the four signals, the phase difference between the first signal and the second signal can be converted into the phase of the quadrature modulated signal, that is, the phase of the quadrature modulated signal can represent the phase difference between the first signal and the second signal.
It should be noted that, a person skilled in the art may construct the quadrature modulator by using an electronic device that is conventional in the technical field of electronic devices, and configure the function of the quadrature modulator by using a conventional implementation method, such as a software method, in the technical field of signal processing, so long as the quadrature modulator can perform quadrature modulation on the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal to obtain a quadrature modulation signal.
3. Voltage acquirer
The voltage acquirer can be used for respectively acquiring phase compensation control voltages of the first path of signals and the second path of signals according to the quadrature modulation signals. The first path of signal and the second path of signal are electric signals, the quadrature modulation signal obtained based on the two paths of signals is also an electric signal, and the phase compensation control voltage of the first path of signal and the phase compensation control voltage of the second path of signal can be obtained according to the voltage component of the electric signal.
It should be noted that, a person skilled in the art may construct the voltage acquirer by using a conventional electronic device in the technical field of electronic devices, and configure the function of the voltage acquirer by using a conventional implementation method in the technical field of signal processing, such as a software method, so long as the voltage acquirer can obtain the phase compensation control voltages of the first path of signal and the second path of signal according to the quadrature modulation signal, and the embodiment of the utility model does not specifically limit the type and model of the device adopted by the voltage acquirer and the implementation method of the function thereof.
4. First phase shifter
The first phase shifter may be configured to perform phase compensation on the first signal and the second signal according to the phase compensation control voltages of the first signal and the second signal.
Based on the signal phase compensation device formed by the quadrature coupler, the quadrature modulator, the voltage acquirer and the first phase shifter, accurate phase compensation control voltage can be acquired before phase compensation is carried out, so that the phase compensation can be rapidly and accurately completed, and the defect that the prior art needs to take a long time to complete the phase compensation is overcome.
In one application scenario based on the above device embodiment, millimeter wave signals sent by signal sources are received by a phased array radar (Phased Array Radar), and a phase difference exists between signals due to different transmission paths of signals received by antennas in the phased array radar. In this case, the signal phase compensation device of the above device embodiment may be used to perform phase compensation on each signal, and perform signal superposition on each signal after phase compensation to obtain a superposition signal, and further perform other signal processing on the superposition signal.
The quadrature coupler, quadrature modulator and voltage acquirer are further described below.
1. Orthogonal coupler
Referring to fig. 2, in some embodiments, the quadrature coupler may include a first quadrature coupling module and a second quadrature coupling module. The first quadrature coupling module may receive the first path of signal and be used to obtain a first in-phase signal and a first quadrature signal which are respectively identical and quadrature to the phase of the first path of signal, and the second quadrature coupling module may receive the second path of signal and obtain a second in-phase signal and a second quadrature signal which are respectively identical and quadrature to the phase of the second path of signal.
It should be noted that, a person skilled in the art may construct the first quadrature coupling module and the second quadrature coupling module by using an electronic device that is conventional in the technical field of electronic devices, and configure functions of each unit in the first quadrature coupling module and the second quadrature coupling module by using a conventional implementation method in the technical field of signal processing, such as a software method, so long as the first quadrature coupling module can obtain the first in-phase signal and the first quadrature signal and the second quadrature coupling module can obtain the second in-phase signal and the second quadrature signal. The embodiment of the utility model does not specifically limit the type and model of the devices adopted by the first orthogonal coupling module and the second orthogonal coupling module and the realization method of the functions.
2. Quadrature modulator
Referring to fig. 3, in some embodiments, the quadrature modulator may include a first multiplier, a second multiplier, and a subtractor. The first multiplier may be configured to multiply the first in-phase signal with the second quadrature signal to obtain a first modulated signal. The second multiplier may be configured to multiply the second in-phase signal with the first quadrature signal to obtain a second modulated signal. The subtractor may be configured to subtract the first modulated signal from the second modulated signal to obtain a quadrature modulated signal. It should be noted that, those skilled in the art may use multipliers and subtractors that are conventional in the electronic device technology field to construct the quadrature modulator, and the embodiment of the present utility model does not specifically limit the type and model of the device used in the quadrature modulator.
Referring to fig. 4, fig. 4 illustrates a principle of acquiring a phase difference from a quadrature modulated signal. As shown in the figure4, the first path of signal is denoted as A 1 sin(ω 0 t+θ det 2) whose phase is denoted A 1 ∠(θ det 2), the second signal is denoted A 2 sin(ω 0 t-θ det 2) whose phase is denoted A 2 ∠(-θ det 2) the phase difference between the first and second signals can be expressed as A 1 /A 2 ∠(θ det )。
The first phase is denoted as alpha A 1 sin(ω 0 t+θ det 2) whose phase is denoted as alpha A 1 ∠(θ det 2), the first quadrature signal is denoted as αA 1 sin(ω 0 t+θ det 2+90 deg.), the phase of which is denoted αa 1 ∠(θ det /2+90°)，
The second in-phase signal is denoted as alpha A 2 sin(ω 0 t-θ det 2) whose phase is denoted as alpha A 2 ∠(-θ det 2) the second quadrature signal is denoted as αA 2 sin(ω 0 t-θ det 2+90 deg.), the phase of which is denoted αa 2 ∠(-θ det /2+90°)，
The phase difference (quadrature error) between the first quadrature signal and the second in-phase signal can be expressed as a 1 /A 2 ∠(θ det The phase difference (quadrature error) between the first in-phase signal and the second quadrature signal can be expressed as a + 1 /A 2 ∠(θ det -90 °). θ in the above quadrature error det I.e. the phase difference between the first and second signals. Therefore, the phase of the quadrature modulated signal can be expressed as the phase difference between the first and second signals by the quadrature modulator, and the phase difference between the first and second signals can be obtained by analyzing the quadrature modulated signal.
Further, in an embodiment of the signal phase difference obtaining apparatus provided in accordance with the present utility model, the apparatus may further include amplifiers connected to the quadrature coupler and the quadrature modulator, respectively. The amplifier may be configured to amplify the first in-phase signal, the first quadrature signal, the second in-phase signal, and the second quadrature signal, respectively. In this embodiment, the quadrature modulator may be configured to quadrature modulate the first in-phase signal, the first quadrature signal, the second in-phase signal, and the second quadrature signal after the signal is amplified, so as to obtain a quadrature modulated signal. In some embodiments, the number of the amplifiers may be four, and the four amplifiers are used for amplifying the first in-phase signal, the first quadrature signal, the second in-phase signal, and the second quadrature signal, respectively. The amplifier may be constructed using a signal amplifying device conventional in the signal processing technology field in this embodiment. For example, VGA (Variable Gain Amplifier) circuits can be used to construct an amplifier
By amplifying the first in-phase signal and the second in-phase signal and amplifying the first quadrature signal and the second quadrature signal, signal interference can be reduced, quadrature modulation is facilitated on each signal, and quadrature modulation signals are obtained.
3. Voltage acquirer
The voltage acquirer may further include a direct current component acquiring module, and the direct current component acquiring module may be configured to acquire a direct current component in the quadrature modulated signal, and the voltage acquirer may be further configured to acquire phase compensation control voltages of the first path signal and the second path signal according to the direct current component, respectively. In some preferred embodiments, the direct current component acquisition module may include a low pass filter that may low pass filter the quadrature modulated signal to acquire the direct current component. The quadrature modulation signal is a composite signal composed of a direct current component and an alternating current component, the phase of the direct current component is fixed, and the phase can represent the phase difference between the first signal and the second signal, i.e. the phase of the direct current component can be directly used as the phase difference. In this case, the phase compensation control voltages of the first and second signals can be obtained directly from the direct current component.
In some embodiments, the voltage acquirer may include a voltage acquirer capable of acquiring the phase compensation control voltages of the first path signal and the second path signal according to the direct current component, respectively. It should be noted that, a person skilled in the art may construct the voltage acquisition unit by using an electronic device that is conventional in the technical field of electronic devices, and configure the function of the voltage acquisition unit by using a conventional implementation method, such as a software method, in the technical field of signal processing, so long as the voltage acquisition unit can respectively acquire the phase compensation control voltages of the first path of signal and the second path of signal according to the direct current component. The embodiment of the utility model does not specifically limit the type and model of the device adopted by the voltage acquisition unit and the realization method of the function.
It is further noted that the voltage acquisition unit is merely provided to illustrate the functional units of the voltage acquirer, and that the physical devices corresponding to these units may be electronic devices or processors themselves, or a part of the software in the electronic devices or processors, a part of the hardware, or a part of a combination of the software and the hardware.
Referring to fig. 5, fig. 5 illustrates the principle of signal phase compensation, wherein the first and second signals, the first and second in-phase signals, and the first and second quadrature signals are the same as the respective related signals shown in fig. 4. As shown in fig. 5, the first modulated signal obtained by multiplying the first in-phase signal and the second quadrature signal is represented as beta 1 (αA 2 sin(ω 0 t-θ det /2+90°)·αA 1 sin(ω 0 t+θ det 2) the second modulation signal obtained by multiplying the second in-phase signal with the first quadrature signal is denoted beta 2 (αA 2 sin(ω 0 t-θ det /2)·αA 1 sin(ω 0 t+θ det 2+90 deg.), subtracting the first and second modulated signals to obtain a quadrature modulated signal (not shown in fig. 5). After that, the quadrature modulated signal is subjected to low pass filtering by a low pass filter circuit in a transimpedance amplifier circuit (Trans Impedance Amplifier, TIA) to obtain the direct current component beta of the quadrature modulated signal 1 β 2 A 1 A 2 sin(θ det ) 2, the phase of the DC component is theta det I.e. between the first and second signals Phase difference. At this time, the phase compensation control voltage V of the first and second signals can be obtained directly from the DC component CTR1 And V CTR2 。
Referring to fig. 6, a phase compensation control voltage V is obtained CTR1 And V CTR2 Thereafter, the phase compensation control voltage V CTR1 Input to the phase shifter PS1 corresponding to the first path signal, and control the phase compensation voltage V CTR2 The phase shifter PS2 corresponding to the second signal is input, and the phases of the first and second signals are compensated to be substantially the same under the control of the phase shifters PS1 and PS 2.
Referring to fig. 7, fig. 7 further illustrates the principle of signal phase compensation, and it is noted that the first and second signals are considered as a whole for analysis due to their principle description. Specifically, the phase difference before and after the phase compensation of the first and second signals is respectively theta in And theta det According to the embodiment of the device, the phase compensation control voltage V can be obtained CTR V is set up CTR Inputting to the phase shifter to obtain the phase theta to be compensated COM1 PD represents a structure for acquiring a phase compensation control voltage in the embodiment of the present utility model. In the principle shown in FIG. 7, the output result of PD is the phase compensation control voltage V CTR . As shown in fig. 7, the phase difference θ after the phase compensation det Has approached 0 indicating that the phases of the first and second signals are substantially identical.
Wherein G is Loop Indicating loop gain, G Loop The calculation formula of (2) is as follows:
k represents the gain of the phase shifter, G represents the acquisition V CTR The gain that is generated in this time is, representation->
Due toThus, G can be adjusted Loop Let θ det Minimizing. However, it is known based on the control theory that G is not caused Loop Maximum, θ det Can reach the minimum and increase G without limit Loop Probably will lead to V CTR Produces severe oscillations, even diverged, and cannot recover to a stable state, where V CTR Under the control of (a) the phase shifter is out of control, theta det It is impossible to minimize. Therefore, before the signal phase compensation device is adopted, G is to be compared with Loop Debugging is carried out to obtain a V-shaped interface CTR Stabilize and enable theta det Minimum optimum G Loop . Due to G Loop KG, so G can be adjusted by adjusting the size of K and/or G Loop Further, beta can be adjusted when the G is adjusted 1 And/or beta 2 Obtain the best G Loop I.e. to obtain the best K, beta 1 、β 2 Is a combination of (a) and (b). The optimum parameters for the completion of the above-mentioned debugging can be directly called when the signal phase compensation device is employed.
In some embodiments, the voltage acquisition component further includes a second amplifier, where the second amplifier is connected to the dc component acquisition module, and the second amplifier is configured to amplify the dc component acquired by the dc component acquisition module, and the voltage acquirer in the voltage acquisition component is further configured to acquire the phase compensation control voltages of the first signal path and the second signal path according to the amplified dc component, respectively. As shown in fig. 6, a direct current component β of the quadrature modulated signal is obtained 1 β 2 A 1 A 2 sin(θ det ) After/2, the VGA circuit can be used to amplify the DC component to obtain amplified DC component G 1 β 1 β 2 A 1 A 2 sin(θ det ) 2, wherein G 1 Representing the gain of the VGA circuit.
By amplifying the direct current component, more accurate phase compensation control voltage is obtained, and therefore the phase compensation effect of the signal is improved.
Referring to fig. 8, fig. 8 illustrates the principle of signal phase compensation after adding the control link of amplifying the dc component based on fig. 7. At this time, the calculation formula of the loop gain is G Loop ＝K 1 G 1 G 2 ，K 1 Representing the gain of the phase shifter, G 1 Represents the gain when amplifying the output result of PD, where G 2 The same as G in fig. 6. In addition to adjusting K when obtaining optimal loop gain 1 And G 2 Can also adjust G 1 Is a value of (2). In the principle shown in FIG. 8, the VGA output result is the phase compensation control voltage V CTR 。
The compensation effect of the phase compensation based on the principle shown in fig. 8 will be described with reference to fig. 9 to 11.
Fig. 9 illustrates waveforms of an input signal, and the abscissa of fig. 9 is an input Phase of the input signal, the unit of the Phase is a Degree, and the ordinate of fig. 9 is a Response Time, and the unit of the Response Time is nanoseconds ns.
FIG. 10 is an exemplary graph of the phase compensation control voltage V before and after phase compensation of an input signal at a response time of 73.5ns and an input phase of-180 CTR Is a waveform of (a). As shown in fig. 10, no phase compensation, V, is performed before 73.5ns CTR Substantially zero. Phase compensation starts at 73.5ns, V CTR Rapidly increases and stabilizes at 200.6mV with V CTR Indicating that the phase compensation of the input signal also tends to stabilize. As can be seen from fig. 10, V CTR Does not generate significant fluctuation and can be quickly stabilizedThis shows that the phase compensation of the input signal will not fluctuate and can be fast stabilized with a high phase compensation effect.
FIG. 11 is an exemplary graph of the phase compensation control voltage V before and after phase compensation of an input signal at a response time of 40.6ns and an input phase of 60 CTR Is a waveform of (a). Similar to FIG. 10, V CTR The phase compensation of the input signal can not fluctuate and can be stabilized quickly, and the phase compensation effect is high.
In some embodiments, the dc component obtaining module further includes a first dc unit and a second dc unit. The first direct current unit may be configured to obtain a direct current component corresponding to the first signal based on a preset ratio corresponding to the first signal and according to the direct current component, and the second direct current unit may be configured to obtain a direct current component corresponding to the second signal based on a preset ratio corresponding to the second signal and according to the direct current component, where a sum of preset ratios corresponding to the first signal and the second signal is 1. In this embodiment, the voltage acquirer is further configured to acquire the phase compensation control voltage of the first signal according to the dc component corresponding to the first signal, and acquire the phase compensation control voltage of the second signal according to the dc component corresponding to the second signal.
The first direct current unit can multiply the direct current component by the preset proportion corresponding to the first path of signal, the multiplication result is the direct current component corresponding to the first path of signal, and the second direct current unit can multiply the direct current component by the preset proportion corresponding to the second path of signal to obtain the direct current component corresponding to the second path of signal. In some preferred embodiments, the preset ratio of each of the first signal and the second signal is 1/2, that is, the dc component of each of the first signal and the second signal is half of the original dc component. It should be noted that, although the embodiment of the present utility model only provides a specific implementation in which the preset ratio is 1/2, those skilled in the art can understand that the preset ratio corresponding to each of the first and second signals may be modified without departing from the technical principles of the present utility model. For example, the preset ratios corresponding to the first and second signals are 0 and 1, respectively. The technical solution after the modification of the preset proportion still falls within the protection scope of the present utility model.
It should be noted that, a person skilled in the art may construct the first and second dc units by using a conventional electronic device in the technical field of electronic devices, and configure functions of the first and second dc units by using a conventional implementation method in the technical field of signal processing, such as a software method, so long as the first and second dc units can obtain dc air volumes corresponding to the first and second signals respectively according to dc components.
The phase compensation control voltage of the first path of signals and the phase compensation control voltage of the second path of signals can be flexibly adjusted based on the direct current components corresponding to the first path of signals and the second path of signals, so that under the control of different phase compensation control voltages, the phase shifter can output different compensation phases, and under the control of different compensation phases, the phases of the first path of signals and the second path of signals after compensation are different.
As shown in fig. 6, the phase of the first path signal is a 1 ∠(θ det 2) the phase of the second path signal is A 2 ∠(-θ det 2) the DC component obtained from the quadrature modulated signal is G 1 β 1 β 2 A 1 A 2 sin(θ det )/2。
If the preset ratio of the first and second signals is 1/2, the phase compensation control voltage V of the first and second signals CTR1 And V CTR2 Are all G 1 β 1 β 2 A 1 A 2 sin(θ det )/4. At V CTR1 Under control of the phase shifter PS1 can shift the phase of the first path signal from θ det Compensation of/2 to theta det At V CTR2 The phase shifter PS2 under control of (a) can shift the phase of the second path signal from- θ det Compensation of/2 to theta det 。
If the first and second paths of signals are presetThe ratios are 0 and 1, respectively, then V CTR1 Is 0, V CTR2 Is G 1 β 1 β 2 A 1 A 2 sin(θ det )/2. At V CTR1 The phase shifter PS1 does not change the phase of the first path signal under control of (a), and is still θ det 2, at V CTR2 The phase shifter PS2 under control of (a) can shift the phase of the second path signal from- θ det Compensation of/2 to theta det /2。
Based on the direct current component acquisition module, the phase after the compensation of the first and second paths of signals can be flexibly changed, so that the requirements of different application scenes on the phase after the compensation can be met, and the application range of the phase compensation device disclosed by the embodiment of the utility model is improved.
Further, in the signal phase compensation device according to the embodiment of the utility model, the device further includes a second phase shifter connected to the voltage acquisition component, and the voltage acquisition component is further configured to acquire the phase compensation control voltages of the first signal and the second signal according to the first signal and the second signal after phase compensation, and output the acquired phase compensation control voltages to the second phase shifter. The second phase shifter is used for respectively carrying out phase compensation on the first path of signals and the second path of signals after the phase compensation according to the re-acquired phase compensation control voltage.
The voltage acquisition component acquires the phase compensation control voltage of the first and second signals according to the phase difference. When the voltage acquisition component is used again to acquire the phase compensation control voltage of the first and second signals after phase compensation, the phase compensation control voltage is actually acquired according to the phase difference between the first and second signals after phase compensation, that is, the phase difference remaining after one phase compensation. Under the control of the phase compensation control voltage, the phase shifter can effectively eliminate the residual phase difference, so that the phase difference between the first signal and the second signal reaches zero. As shown in fig. 12, fig. 12 illustrates the addition of a second phase shifter K on the basis of fig. 8 2 Signal phase compensation after this secondary compensation stepIs a principle of (a). Phase difference theta between the first and second signals after the first compensation is completed det Outputs the phase compensation control voltage to the second phase shifter K again through the PD 2 Through a second phase shifter K 2 The phase difference between the first and second signals after the phase compensation is theta out ，θ out Less than theta det And has been very small, approaching zero.
In some embodiments, the signal phase compensation apparatus further comprises a third amplifier connected to the voltage acquisition component and the second phase shifter, respectively. The third amplifier is used for amplifying the re-acquired phase compensation control voltage and outputting the amplified phase compensation control voltage to the second phase shifter, the second phase shifter is also used for respectively carrying out phase compensation on the first path of signal and the second path of signal after phase compensation according to the amplified phase compensation control voltage, the gain of the third amplifier is the inverse of the product of preset gains, and the product of the preset gains is the product of the respective corresponding gains of the voltage acquisition component and the second phase shifter. As shown in fig. 12, the phase compensation control voltage is outputted via the PD and first passed through the third amplifier G 3 Amplified and output to the second phase shifter K 2 Third amplifier G 3 The gain of (2) can be expressed as 1/K 2 G 1 G 2 ，K 2 Representing the gain of the second phase shifter.
The following describes embodiments of the phased array provided by the present utility model.
In an embodiment of the phased array according to an embodiment of the utility model, the phased array may comprise a control device, a phase shifter and a signal adder. The control device is a phased array control device according to the foregoing device embodiment, and may be used to control each phase shifter to perform phase compensation on signals received by each antenna in the array antenna. The signal adder may be configured to perform signal addition on the signals received by the antennas after the phase compensation and output the signals.
Referring to fig. 13, fig. 13 illustrates the main structure of the phased array. As shown in FIG. 13, the phased array includes N phase shifters (N.gtoreq.4), i.e., PS 1 To PS (PS) N ，PS 1 To PS (PS) N Respectively for signals x received by N paths of antennas 1 (t) to x N (t) performing phase compensation, and performing phase compensation on the phase of each signalTo->And the same signals after phase compensation are input to a signal adder to obtain a superimposed signal y (t).
Based on the phased array, the phase compensation of each path of signal can be accurately completed, and the signal quality of the received signal is improved.
Thus far, the technical solution of the present utility model has been described in connection with one embodiment shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.
Claims (12)
1. A signal phase compensation device, which is characterized by comprising a voltage acquisition component and a first phase shifter, wherein the voltage acquisition component comprises a quadrature coupler, a quadrature modulator and a voltage acquisition device which are connected in sequence;
the quadrature coupler is used for acquiring a first in-phase signal and a first quadrature signal which are respectively identical and quadrature to the phase of the first path of signal, and acquiring a second in-phase signal and a second quadrature signal which are respectively identical and quadrature to the phase of the second path of signal;
the quadrature modulator is used for carrying out quadrature modulation on the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal so as to obtain quadrature modulation signals;
The voltage acquirer is used for acquiring phase compensation control voltages of the first path of signals and the second path of signals according to the quadrature modulation signals;
the first phase shifter is used for respectively carrying out phase compensation on the first path of signal and the second path of signal according to the phase compensation control voltage of the first path of signal and the second path of signal.
2. The apparatus of claim 1, wherein the quadrature coupler comprises:
the first quadrature coupling module is used for acquiring a first in-phase signal and a first quadrature signal which are respectively identical and quadrature with the phase of the first path of signal;
and the second quadrature coupling module is used for acquiring a second in-phase signal and a second quadrature signal which are respectively identical and quadrature with the phase of the second path signal.
3. The apparatus of claim 1, wherein the quadrature modulator comprises:
a first multiplier for multiplying the first in-phase signal and the second quadrature signal to obtain a first modulated signal;
a second multiplier for multiplying the second in-phase signal with the first quadrature signal to obtain a second modulated signal;
and a subtractor for subtracting the first modulation signal from the second modulation signal to obtain a quadrature modulation signal.
4. The apparatus of claim 1, wherein the voltage acquisition component further comprises a first amplifier connected to the quadrature coupler and the quadrature modulator, respectively;
the first amplifier is used for respectively amplifying the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal;
the quadrature modulator is further configured to perform quadrature modulation on the first inphase signal, the first quadrature signal, the second inphase signal, and the second quadrature signal after signal amplification, so as to obtain a quadrature modulated signal.
5. The apparatus of claim 4, wherein the number of first amplifiers is four and each first amplifier is configured to amplify a first in-phase signal, a first quadrature signal, a second in-phase signal, and a second quadrature signal, respectively.
6. The apparatus of claim 1, wherein the voltage acquirer comprises:
a direct current component acquisition module for acquiring a direct current component in the quadrature modulated signal;
the voltage acquirer is also used for respectively acquiring phase compensation control voltages of the first path of signals and the second path of signals according to the direct current component.
7. The apparatus of claim 6, wherein the direct current component acquisition module comprises a low pass filter for low pass filtering the quadrature modulated signal to acquire the direct current component.
8. The apparatus of claim 6, wherein the direct current component acquisition module further comprises a first direct current unit and a second direct current unit;
the first direct current unit is used for acquiring a direct current component corresponding to the first path of signal based on a preset proportion corresponding to the first path of signal and according to the direct current component;
the second direct current unit is used for acquiring a direct current component corresponding to the second path of signal based on a preset proportion corresponding to the second path of signal and according to the direct current component;
the voltage acquirer is also used for acquiring the phase compensation control voltage of the first path of signal according to the direct current component corresponding to the first path of signal and acquiring the phase compensation control voltage of the second path of signal according to the direct current component corresponding to the second path of signal;
wherein, the sum of the preset proportion corresponding to each of the first path of signals and the second path of signals is 1.
9. The apparatus of claim 6, wherein the voltage acquisition component further comprises a second amplifier coupled to the dc component acquisition module;
The second amplifier is used for amplifying the direct current component acquired by the direct current component acquisition module;
the voltage acquirer is also used for respectively acquiring phase compensation control voltages of the first path of signals and the second path of signals according to the amplified direct current component.
10. The apparatus of any one of claims 1 to 9, further comprising a second phase shifter connected to the voltage acquisition component;
the voltage acquisition component is further used for acquiring phase compensation control voltages of the first path of signals and the second path of signals according to the first path of signals and the second path of signals after phase compensation, and outputting the acquired phase compensation control voltages to the second phase shifter;
the second phase shifter is used for respectively carrying out phase compensation on the first path of signals and the second path of signals after phase compensation according to the re-acquired phase compensation control voltage.
11. The apparatus of claim 10, further comprising a third amplifier connected to the voltage acquisition component and the second phase shifter, respectively;
the third amplifier is used for amplifying the re-acquired phase compensation control voltage and outputting the amplified phase compensation control voltage to the second phase shifter;
The second phase shifter is further used for respectively carrying out phase compensation on the first path of signals and the second path of signals after phase compensation according to the amplified phase compensation control voltage;
the gain of the third amplifier is the inverse of a preset gain product, and the preset gain product is the product of the corresponding gains of the voltage acquisition component and the second phase shifter.
12. A phased array, the phased array comprising:
a plurality of phase shifters;
control means for controlling each phase shifter to perform phase compensation on signals received by each antenna in the array antenna, respectively, the control means comprising the signal phase compensation means according to any one of claims 1 to 11;
and the signal adder is used for carrying out signal superposition on the signals received by each path of antenna after the phase compensation and outputting the signals.
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Denomination of utility model: Signal phase compensation device, phased array Granted publication date: 20231031 Pledgee: Beijing Zhongguancun bank Limited by Share Ltd. Pledgor: Beijing Jushu Technology Co.,Ltd. Registration number: Y2024980038722 |