CN114826442A - Phase calibration method, related device and equipment - Google Patents
Phase calibration method, related device and equipment Download PDFInfo
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- CN114826442A CN114826442A CN202210278789.1A CN202210278789A CN114826442A CN 114826442 A CN114826442 A CN 114826442A CN 202210278789 A CN202210278789 A CN 202210278789A CN 114826442 A CN114826442 A CN 114826442A
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- H04B17/00—Monitoring; Testing
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- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
Abstract
The embodiment of the application discloses a phase calibration method, a related device and equipment. The method comprises the following steps: enabling n channels of an array antenna, wherein n is a positive integer greater than or equal to 2, determining a reference phase difference between a debug signal and a reference signal in a reference channel of the n channels and a target phase difference between a debug signal and the reference signal in n-1 channels other than the reference channel, and adjusting a phase shifter in each of the n-1 channels based on a difference between the target phase difference and the reference phase difference of each of the n-1 channels, so that a phase of the debug signal of each of the n-1 channels is the same as a phase of a debug limit of the reference channel. According to the embodiment of the application, the phase of the array antenna channel is calibrated under the condition that n channels of the array antenna are started, so that the influence of the mutual coupling effect between the channels on the signal phase in the channels in the phase calibration of the array antenna channel can be overcome.
Description
The present application is a divisional application, the original application having application number 201880095116.4, the original application date 26/06/2018, the entire contents of the original application being incorporated by reference in the present application.
Technical Field
The present application relates to the field of antenna technologies, and in particular, to a method, a related apparatus, and a device for calibrating a multi-channel phase of an array antenna.
Background
An antenna is a necessary energy conversion device in a radio system, which is capable of transmitting and receiving electromagnetic waves with high efficiency. The array antenna is formed by spatially arranging two or more single antennas working at the same frequency according to a certain requirement, wherein each antenna corresponds to one channel, and each channel is used for transmitting a signal received by the corresponding antenna or transmitting a signal to be transmitted to the corresponding antenna. Since the array antenna has advantages of providing a flexible radiation pattern, conveniently adjusting a beam width, and improving an antenna gain, the array antenna has been widely used in various communication systems and radar systems.
However, in practical applications, due to the influence of factors such as differences of components, differences of circuit design and manufacturing, and coupling effects between channels, the problem of inconsistent phases usually exists between the channels of the array antenna, and therefore, the phases of signals in the channels of the array antenna must be corrected to make the phases of the signals in the channels of the array antenna consistent, but the conventional method for calibrating the phases of the array antenna cannot overcome the influence of the coupling effects between the channels on the phases of the signals in the channels.
Disclosure of Invention
The embodiment of the application provides a phase calibration method, a related device and equipment, which can overcome the influence of the coupling effect between channels on the signal phase in the channel in the phase calibration process of the traditional array antenna.
In a first aspect, an embodiment of the present application provides an array antenna multichannel phase calibration method, where the method includes:
enabling n channels of an array antenna, and determining a first phase difference between a debugging signal and a reference signal of each channel of the n channels, wherein the first phase difference comprises a reference phase difference and a target phase difference, the reference phase difference is a phase difference between the debugging signal and the reference signal of a reference channel of the n channels, and the target phase difference is a phase difference between the debugging signal and the reference signal of each of n-1 channels except the reference channel, and n is a positive integer greater than or equal to 2;
determining a second phase difference between the debugging signal of each channel in the n-1 channels and a reference signal according to a difference value between a target phase difference and a reference phase difference, wherein the reference signal is the debugging signal in the reference channel;
adjusting the phase shifter in each of the n-1 channels according to a second phase difference between the debug signal and the reference signal in each of the n-1 channels, such that the phase of the debug signal in each of the n-1 channels is the same as the phase of the reference signal.
As can be seen from the above, in the method for calibrating channels of an array antenna, n channels of the array antenna are simultaneously opened, a first phase difference between a debug signal and a reference signal in each channel is determined, then a debug signal in a reference channel is used as a reference signal, second phase differences between the debug signal and the reference signal in the remaining n-1 channels except the reference channel are determined according to the first phase difference between the debug signal and the reference signal in each channel, and then a phase shifter in each channel of the n-1 channels is adjusted according to the second phase differences between the debug signal and the reference signal in each channel of the n-1 channels, so that the phase of the debug signal in each channel can be calibrated to be the same as the reference signal through the phase shifter, and since the n channels of the array antenna are all opened in the calibration process, the first phase difference between the debugging signal and the reference signal in each channel and the second phase difference between the debugging signal and the reference signal in each channel are obtained under the condition that the interference of the coupling effect among the channels exists, and the influence of the coupling effect among the channels on the phase is calculated in the calibration process, so that the method can compensate the phase difference of the signals among the channels caused by the mutual coupling effect, and further overcomes the influence of the coupling effect among the channels on the phase of the signals in the channels in the phase calibration of the traditional array antenna channels.
In one possible embodiment, the kth first phase difference is determined according to a phase difference between the debug signal in the kth channel and an intermediate composite signal, an amplitude of the debug signal in the kth channel, and an amplitude of the intermediate composite signal, wherein the kth channel is any one of the n channels, the intermediate composite signal is a composite signal synthesized by the debug signals in n-1 channels other than the kth channel, and k is a positive integer smaller than or equal to n.
In one possible embodiment, the kth first phase difference is determined according to a vector algorithm based on a phase difference between the debug signal in the kth channel and the intermediate composite signal, an amplitude of the debug signal in the kth channel, and an amplitude of the intermediate composite signal.
In one possible embodiment, determining the phase difference between the debug signal in the k-th channel and the intermediate composite signal, the amplitude of the debug signal in the k-th channel, and the amplitude of the intermediate composite signal includes:
determining amplitudes of at least three synthesized signals synthesized by the debugging signals of the n channels when the phase shifter of the k channel is in at least three different phase states, wherein the different phase states are states of the phase shifter in different additional phase shifts, and the amplitudes of the at least three synthesized signals are in one-to-one correspondence with the at least three different phase states;
and determining the phase difference between the debugging signal in the kth channel and the intermediate synthetic signal, the amplitude of the debugging signal in the kth channel and the amplitude of the intermediate synthetic signal by combining a cosine law according to the amplitudes of the at least three synthetic signals.
In a possible embodiment, the determining the amplitudes of at least three synthesized signals synthesized by the n channels of the phase shifter in at least three different phase states includes:
acquiring first power of a first synthesized signal, and determining the amplitude of the first synthesized signal according to the first power, wherein the first synthesized signal is a synthesized signal synthesized by debugging signals of the n channels when a phase shifter of a kth channel is in a first phase state;
acquiring second power of a second synthesized signal, and determining the amplitude of the second synthesized signal according to the second power, wherein the second synthesized signal is a synthesized signal synthesized by debugging signals of the n channels when the phase shifter of the kth channel is in a second phase state;
and acquiring third power of a third composite signal, and determining the amplitude of the third composite signal according to the third power, wherein the third composite signal is a composite signal synthesized by debugging signals of the n channels when the phase shifter of the kth channel is in a third phase state.
In one possible embodiment, determining, according to amplitudes of at least three synthesized signals, a phase difference between the debug signal in the k-th channel and the intermediate synthesized signal, an amplitude of the debug signal in the k-th channel, and an amplitude of the intermediate synthesized signal by using a cosine law includes:
determining a phase difference between the debug signal in the kth channel and the intermediate composite signal, an amplitude of the debug signal in the kth channel, and an amplitude of the intermediate composite signal according to the following formulas:
wherein, C k Is the amplitude of the intermediate composite signal, A k Is the amplitude, θ, of the debug signal in the k-th channel k For the phase difference, γ, between the debug signal and the intermediate composite signal in the k-th channel 1 For an additional phase shift, γ, of the phase shifter in the first phase state 2 For an additional phase shift, γ, of the phase shifter in the second phase state 3 For an additional phase shift of the phase shifter in a third phase state, K 1 Is the amplitude, K, of said first composite signal 2 Is the amplitude, K, of said second composite signal 3 Is the amplitude of the third composite signal.
In one possible embodiment, the first power of the first composite signal, the second power of the second composite signal, and the third power of the third composite signal are obtained from a power meter.
In one possible implementation, the first phase difference between the debug signal and the reference signal in the kth channel is determined according to the following equation:
wherein A is k Is the amplitude, C, of the debug signal in the k-th channel k Is the amplitude, θ, of the intermediate composite signal k For the phase difference between the debug signal and the intermediate composite signal in the kth channel,
represents a debug signal in the k-th channel,
representing the intermediate composite signal, is then,
is the first phase difference between the debug signal and the reference signal in the kth channel.
In a possible embodiment, the first phase state is a state in which the additional phase shift of the phase shifter of the k-th channel is 0; the second phase state is a state when the additional phase shift of the phase shifter of the kth channel is pi/2; the third phase state is a state when the additional phase shift of the phase shifter of the kth channel is pi.
In a second aspect, an embodiment of the present application provides a multi-channel phase calibration apparatus, where the calibration apparatus includes a determining unit and an adjusting unit:
the determining unit is configured to determine, when n channels of the array antenna are started, a first phase difference between a debug signal and a reference signal of each of the n channels of the array antenna, where the first phase difference includes a reference phase difference and a target phase difference, the reference phase difference is a phase difference between the debug signal and the reference signal of a reference channel of the n channels, and the target phase difference is a phase difference between the debug signal and the reference signal of each of n-1 channels other than the reference channel, where n is a positive integer greater than or equal to 2;
the determining unit is further configured to determine, according to a difference between a target phase difference and a reference phase difference, a second phase difference between a debug signal and a reference signal of each of the n-1 channels, where the reference signal is a debug signal in the reference channel;
the adjusting unit is configured to adjust the phase shifter in each of the n-1 channels according to a second phase difference between the debug signal and the reference signal in each of the n-1 channels, so that the phase of the debug signal in each of the n-1 channels is the same as the phase of the reference signal.
In one possible embodiment, the kth first phase difference is determined according to a phase difference between the debug signal in the kth channel and an intermediate composite signal, an amplitude of the debug signal in the kth channel, and an amplitude of the intermediate composite signal, wherein the kth channel is any one of the n channels, the intermediate composite signal is a composite signal synthesized by the debug signals in n-1 channels other than the kth channel, and k is a positive integer smaller than or equal to n.
In one possible embodiment, the kth first phase difference is determined according to a vector algorithm based on a phase difference between the debug signal in the kth channel and the intermediate composite signal, an amplitude of the debug signal in the kth channel, and an amplitude of the intermediate composite signal.
In a possible implementation, the determining unit is further configured to:
determining amplitudes of at least three synthesized signals synthesized by the debugging signals of the n channels when the phase shifter of the k channel is in at least three different phase states, wherein the different phase states are states of the phase shifter in different additional phase shifts, and the amplitudes of the at least three synthesized signals are in one-to-one correspondence with the at least three different phase states;
and determining the phase difference between the debugging signal in the kth channel and the intermediate synthetic signal, the amplitude of the debugging signal in the kth channel and the amplitude of the intermediate synthetic signal by combining a cosine law according to the amplitudes of the at least three synthetic signals. In a possible embodiment, the apparatus further comprises:
in a possible embodiment, the apparatus further comprises: a power obtaining unit, configured to obtain a first power of a first synthesized signal, where the first synthesized signal is a synthesized signal obtained by synthesizing the n channels of debugging signals when the phase shifter of the kth channel is in a first phase state;
the determination unit is further configured to: determining an amplitude of the first composite signal from the first power;
the power acquisition unit is further configured to: acquiring second power of a second synthesized signal, wherein the second synthesized signal is a synthesized signal synthesized by the debugging signals of the n channels when the phase shifter of the kth channel is in a second phase state;
the determination unit is further configured to: determining an amplitude of the second composite signal according to the second power;
the power acquisition unit is further configured to: acquiring a third power of a third composite signal, wherein the third composite signal is a composite signal synthesized by the debugging signals of the n channels when the phase shifter of the kth channel is in a third phase state;
in a possible implementation, the determining unit is further configured to:
determining a phase difference between the debug signal in the kth channel and the intermediate composite signal, an amplitude of the debug signal in the kth channel, and an amplitude of the intermediate composite signal according to the following formulas:
wherein, C k Is the middle jointAmplitude of the resultant signal, A k Is the amplitude, θ, of the debug signal in the k-th channel k For the phase difference, γ, between the debug signal and the intermediate composite signal in the kth channel 1 For an additional phase shift, γ, of the phase shifter in the first phase state 2 For an additional phase shift, γ, of said phase shifter in the second phase state 3 For an additional phase shift of the phase shifter in a third phase state, K 1 Is the amplitude, K, of the first composite signal 2 Is the amplitude, K, of said second composite signal 3 Is the amplitude of the third composite signal.
In one possible embodiment, the power obtaining unit is a power meter.
The determination unit is further configured to: determining an amplitude of the third composite signal based on the third power.
In a possible implementation, the determining unit is further configured to:
determining a first phase difference between a debug signal and a reference signal in the kth channel according to the following equation:
wherein A is k For the amplitude of the debug signal in said k-th channel, C k Is the amplitude, theta, of the intermediate composite signal k For the phase difference between the debug signal and the intermediate composite signal in the kth channel,
represents a debug signal in the k-th channel,
representing the intermediate composite signal, is then,
is the first phase difference between the debug signal and the reference signal in the kth channel.
In a possible embodiment, the first phase state is a state in which the additional phase shift of the phase shifter of the k-th channel is 0; the second phase state is a state when the additional phase shift of the phase shifter of the kth channel is pi/2; the third phase state is a state when the additional phase shift of the phase shifter of the kth channel is pi.
In a third aspect, an embodiment of the present application provides a phase calibration device, including a processor, a transceiver, a power measurement module, and a memory, where the processor, the transceiver, the power measurement module, and the memory are connected to each other, where the memory is used to store application program codes, and the processor is configured to call the program codes to perform the method according to the first aspect.
In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, where the computer program is implemented to implement the method according to the first aspect when executed by a processor.
In the multi-channel phase calibration method for the array antenna, n channels of the array antenna are opened simultaneously to receive or transmit signals, and the debugging signals in each channel are obtained after interference including mutual coupling effect, so that the second phase difference between the debugging signals and the reference signals in each channel determined by the method is the phase difference obtained under the condition that the mutual coupling effect exists, namely the phase difference caused by the mutual coupling effect exists in the second phase difference, when the array antenna is calibrated according to the second phase difference obtained by the method, the phase difference caused by the mutual coupling effect can be compensated, and the influence of the mutual coupling effect on the signal phase in the channels in the traditional array antenna phase calibration is overcome.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic structural diagram of an array antenna according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a prior art phase calibration of an array antenna by a vector network analyzer.
Fig. 3 is a schematic flowchart of a multi-channel phase calibration method for an array antenna according to an embodiment of the present application.
Fig. 4 is a flowchart illustrating a method for determining a first phase difference according to an embodiment of the present application.
Fig. 5 is a flowchart illustrating a method for determining a phase difference between a debug signal and an intermediate composite signal in a k-th channel, an amplitude of the debug signal in the k-th channel, and an amplitude of the intermediate composite signal according to an embodiment of the present application.
Fig. 6 is a schematic diagram of an array antenna multichannel phase calibration system according to an embodiment of the present application.
Fig. 7 is a schematic diagram illustrating a relationship between a debug signal and a reference signal by using a signal vector according to an embodiment of the present application.
Fig. 8 is a schematic diagram of a cosine theorem according to an embodiment of the present disclosure.
Fig. 9 is a schematic diagram illustrating a relationship among signal vectors, intermediate combining vectors, and combining vectors in four channels of an array antenna according to an embodiment of the present application.
Fig. 10 is a diagram illustrating the effect of calibrating signals in each channel by implementing the multi-channel phase calibration method provided in the present application.
Fig. 11 is a schematic diagram of another array antenna multi-channel phase calibration system provided in the embodiments of the present application.
Fig. 12 is a schematic structural diagram of an array antenna multichannel phase calibration apparatus according to an embodiment of the present application.
Fig. 13 is a schematic structural diagram of an array antenna multichannel phase calibration device according to an embodiment of the present application.
Detailed Description
For ease of understanding, the following first describes how the array antenna performs signal transmission and signal reception.
The array antenna includes a plurality of channels, each of which is a radio frequency circuit including an antenna, a feeder, an amplifier, a phase shifter, and the like, as shown in fig. 1, fig. 1 is a schematic structural diagram of an array antenna provided in an embodiment of the present application. When the array antenna is in a receiving state, the array antenna transmits received signals to the high-frequency amplifier and the intermediate-frequency amplifier through the feeder line, the signals are subjected to phase compensation through the phase shifter after being amplified to obtain signals meeting the phase requirement, and finally the signals in each channel are synthesized into one path of signal through the power distribution network to serve as the signals finally received by the array antenna. When the array antenna is in a transmitting state, the signals are divided into multiple paths of signals through the power division network according to equal or unequal power division of the signals to be transmitted, phase compensation is carried out on the signals through phase shifters in all the channels to obtain signals meeting phase requirements, and finally the signals are amplified by the intermediate frequency amplifier and the high frequency amplifier and transmitted to the antenna through the feeder line, and then the signals are transmitted out through the antenna.
The array antenna generally adopts a power synthesis technology to synthesize signals transmitted or received by a plurality of channels of the array antenna into one path of signal, and when signals in different channels are synthesized, the signals in each channel can cause different enhancement or attenuation of the amplitude of the synthesized signal at different moments because of inconsistent phases (for example, after two same signals with a period of 2 pi pass through two different channels, if the phases of the signals are different by pi, the amplitude of the synthesized signal can be zero during synthesis), thereby seriously affecting the radiation characteristics of the array antenna such as synthesis gain, a directional diagram and the like, and therefore, the consistency of the phases of the signals in each channel of the array antenna must be ensured.
In order to overcome the problem that the phases of all channels of an array antenna are not consistent, the phases of signals in all channels of the array antenna need to be calibrated. As shown in fig. 2, fig. 2 is a schematic diagram illustrating phase calibration of an array antenna by a vector network analyzer, where a port 1 of the vector network analyzer is connected to a transmitting antenna, a port 2 of the vector network analyzer is connected to the array antenna, the transmitting antenna is configured to transmit a test signal generated by a signal source in the vector network analyzer, the array antenna receives the test signal, other channels except the test channel are closed, the received test signal is transmitted to the vector network analyzer through the test channel, and the vector network analyzer analyzes the test signal after passing through the test channel to obtain a phase of the test signal after passing through the test channel. For example, when the jth channel (j is a positive integer less than or equal to m) in all m channels (m is a positive integer greater than 1) of the array antenna is tested, only the jth channel is opened and other m-1 channels are closed, the array antenna can only receive a test signal through the antenna corresponding to the jth channel, and input the received test signal into the vector network analyzer through the jth channel, and the vector network analyzer analyzes the test signal after passing through the jth channel to obtain the phase of the test signal after passing through the jth channel. And then, by adopting the same method, one channel in the untested channels is opened as a test channel, the other m-1 channels are closed, the phase of the test signal passing through the test channel is obtained by a vector network analyzer, and finally the phase of the signal in each channel in the m channels is obtained. And finally, selecting a signal in any one of the m channels as a reference signal, determining the phase difference between the signals in the other m-1 channels and the reference signal according to the phase of the signal in each channel obtained by the vector network analyzer, and adjusting the additional phase shift of the phase shifter in the corresponding channel according to the phase difference between the signal in each channel of the m-1 channels and the reference signal, so that when the signal in each channel passes through the phase shifter, the phase of the signal in each channel can be compensated by the phase shifter, and the phase of the signal in each channel is calibrated to be the same as the phase of the reference signal.
However, in practical use, each channel of the array antenna is often opened at the same time to receive or transmit signals, and whether each antenna in the array antenna is in a transmitting state or a receiving state, each channel may have a part of electromagnetic energy radiated to some or all of the other channels, and may also receive electromagnetic energy radiated from some or all of the other channels.
To solve the problem of inconsistent signal phases in the channels due to mutual coupling effect between the channels of the array antenna, the present application provides a method for calibrating a multi-channel phase of an array antenna, please refer to fig. 3, where fig. 3 is a schematic flow chart of the method for calibrating a multi-channel phase of an array antenna provided in an embodiment of the present application, and as shown in the figure, the method for calibrating a phase includes:
and S20, enabling the n channels of the array antenna, and determining a first phase difference between the debugging signal and the reference signal of each of the n channels of the array antenna.
The debugging signal is a signal of a test signal received by each channel of the n channels after passing through the corresponding channel, and data carried by the test signal received by the antenna corresponding to each channel is the same. The first phase difference includes a reference phase difference between the debug signal of the reference channel of the n channels and the reference signal, and a target phase difference between the debug signal of each of the n-1 channels other than the reference channel and the reference signal. Wherein the reference channel is any one of the n channels.
In a possible embodiment, the reference signal is a composite signal of the phase shifters of each of the n channels, the debugging signals in the n channels being synthesized in the first phase state.
In this embodiment of the present application, the first phase state of the phase shifter in each channel may be a state when the additional phase shift of the phase shifter is 0 degrees, that is, before performing multi-channel phase calibration on the array antenna, the additional phase shifts of the phase shifters in the n channels are all adjusted to 0 degrees; for example, after the calibration of the four channels of the array antenna, the additional phase shifts of the phase shifters in the first channel to the fourth channel are respectively 15 degrees, 26 degrees, 45 degrees, and 60 degrees, and in this calibration, the first phase state of the phase shifter in the first channel is a state when the additional phase shift is 15 degrees, the first phase state of the phase shifter in the second channel is a state when the additional phase shift is 26 degrees, the first phase state of the phase shifter in the third channel is a state when the additional phase shift is 45 degrees, and the first phase state of the phase shifter in the fourth channel is a state when the additional phase shift is 60 degrees.
And S21, determining a second phase difference between the debugging signal and the reference signal of each channel in the n-1 channels according to the difference value between the target phase difference and the reference phase difference. The reference signal is a debugging signal in the reference channel.
S22, adjusting the phase shifter in each of the n-1 channels according to the second phase difference between the debugging signal and the reference signal in each of the n-1 channels, so that the phase of the debugging signal in each of the n-1 channels is the same as the phase of the reference signal.
And adjusting the additional phase shift of the phase shifter in the channel corresponding to each second phase difference according to the n-1 second phase differences obtained in the step S21, so that the phase of the signal in each channel of the n-1 channels can be compensated by the phase shifter when the signal passes through the phase shifter, and the phase of the signal in each channel is the same as the phase of the reference signal after the signal passes through the phase shifter.
The method for determining the first phase difference in step S20 is described below by taking the kth channel (k is a positive integer, k is 1,2, … n) of the n channels as an example, please refer to fig. 4, where fig. 4 is a schematic flowchart of a method for determining a first phase difference provided in an embodiment of the present application, and as shown in the drawing, the method includes:
s201, determining a phase difference between the debugging signal in the k-th channel and the intermediate composite signal, an amplitude of the debugging signal in the k-th channel and an amplitude of the intermediate composite signal.
Wherein the intermediate composite signal is a composite signal synthesized by the debugging signals in the rest n-1 channels except the k channel.
S202, determining a first phase difference between the debugging signal in the kth channel and the reference signal according to the phase difference between the debugging signal in the kth channel and the intermediate synthetic signal, the amplitude of the debugging signal in the kth channel and the amplitude of the intermediate synthetic signal by combining a vector algorithm.
Referring to fig. 5, the method for determining the phase difference between the debug signal and the intermediate composite signal in the kth channel, the amplitude of the debug signal in the kth channel, and the amplitude of the intermediate composite signal in the step S201 includes:
s2011, acquiring first power of a first synthesized signal, and determining the amplitude of the first synthesized signal according to the first power;
s2012, acquiring a second power of a second synthesized signal, and determining an amplitude of the second synthesized signal according to the second power;
s2013, obtaining third power of a third synthetic signal, and determining the amplitude of the third synthetic signal according to the third power;
the first synthesized signal is a synthesized signal synthesized by the debugging signals of the n channels when the phase shifter of the k channel is in a first phase state; the second synthetic signal is a synthetic signal synthesized by the debugging signals of the n channels when the phase shifter of the kth channel is in a second phase state; the third composite signal is a composite signal of the n channels of the debugging signals when the phase shifter of the kth channel is in a third phase state, and the first phase state, the second phase state and the third phase state are states of the phase shifter at different additional phase shifts. In the calibration process, after acquiring the first power of the first synthesized signal, determining the amplitude of the first synthesized signal according to the relationship between the signal power and the signal amplitude, then adjusting the additional phase shift of the phase shifter of the kth channel, adjusting the phase shifter of the kth channel from the first phase state to the second phase state, acquiring the second power of the second synthesized signal and determining the amplitude of the second synthesized signal, then continuing to adjust the additional phase shift of the phase shifter of the kth channel, adjusting the phase shifter of the kth channel from the second phase state to the third phase state, acquiring the third power of the third synthesized signal and determining the amplitude of the third synthesized signal.
In a possible embodiment, a signal source and a power meter are used to replace a vector network analyzer in a conventional calibration scheme, and the power meters are used to obtain the power of the first synthesized signal, the power of the second synthesized signal, and the power of the third synthesized signal, respectively, so as to determine the amplitude of each synthesized signal. As shown in fig. 6, fig. 6 is a schematic diagram of an array antenna multichannel phase calibration system provided in an embodiment of the present application, where an array antenna is in a receiving mode, a signal source is connected to a transmitting antenna, a power meter is connected to the array antenna, the signal source transmits a test signal to the array antenna through the transmitting antenna, the array antenna simultaneously opens n channels, and transmits n debug signals passing through the n channels to a power distribution network, where the n debug signals correspond to the n channels one to one, the power distribution network combines the n debug signals into a combined signal and inputs the combined signal to the power meter, and the power meter determines an amplitude of the combined signal according to a relationship between the power and the amplitude of the combined signal by measuring the power of the combined signal, where a relationship between the power and the amplitude of the combined signal is:
where M is the amplitude of the composite signal, P is the power of the composite signal, and Rs is the impedance of the array antenna. When determining the phase difference between the debugging signal in the kth channel and the intermediate synthesized signal, the amplitude of the debugging signal in the kth channel and the amplitude of the intermediate synthesized signal, synthesizing the debugging signals in n channels of a phase shifter in the kth channel into a first synthesized signal by a power division network in a first phase state, and then transmitting the first synthesized signal to a power meter, wherein the power meter acquires the first power of the first synthesized signal and further determines the first amplitude of the first synthesized signal; then, the phase shifter in the kth channel is adjusted to be in a second phase state, the power distribution network synthesizes debugging signals in n channels when the phase shifter in the kth channel is in the second phase state into a second synthesized signal, the power meter obtains second power of the second synthesized signal, and then a second amplitude of the second synthesized signal is determined; and adjusting the phase shifter in the kth channel to be in a third phase state, synthesizing debugging signals in the n channels of the phase shifter in the kth channel in the third phase state into a third synthesized signal by the power distribution network, acquiring third power of the third synthesized signal by the power meter, and further determining a third amplitude of the third synthesized signal.
And S2014, determining the phase difference between the debugging signal in the k-th channel and the intermediate synthetic signal, the amplitude of the debugging signal in the k-th channel and the amplitude of the intermediate synthetic signal by combining the cosine law according to the three amplitudes of the three synthetic signals of the phase shifter of the k-th channel in three different phase states.
In the following, taking n equal to 4 as an example, the method for calibrating the multi-channel phase of the array antenna provided by the present application is described in detail, and in a specific embodiment, the signal may be a signal vector
And (4) performing representation. FIG. 7 is a schematic diagram of a relationship between a debug signal and a reference signal for each channel of an array antenna represented by a signal vector, such as the signal vector shown in FIG. 7
And
respectively representing the debugging signals in the four channels from the first channel to the fourth channel of the array antenna before the calibration, and according to the vector synthesis principle, the signal vector
And
can be synthesized to obtain a synthesized vector
Dividing the signal vector in the fourth channel
Outer, signal vector
And
intermediate synthetic vectors can be synthesized
According to the cosine theorem as shown in FIG. 8, the following relationship exists in the triangle ABC as shown in FIG. 8:
the angle alpha is an included angle between the side AC and the side BC in the triangle, a is the side length of the side BC, b is the side length of the side AC, and c is the side length of the side AB.
Then in fig. 7, the vectors are synthesized
Can be determined by the power of the composite signal measured by a power meter, assuming a signal vector
Has an amplitude of X 4 Intermediate synthetic vectors
Of amplitude C, signal vector
And intermediate synthetic vector
Is set as beta in the vector
Vector
And a vector
Applying cosine theorem to the formed vector triangle, the following formula can be obtained:
where pi-beta corresponds to the angle alpha, intermediate resultant vector
The amplitude C of (a) is equivalent to the side length a, the signal vector
Amplitude X of 4 Equivalent to side length b, the resultant vector
The amplitude K of (a) corresponds to the side length c. By deriving equation 1, we can obtain:
according to the above principle, the step of determining the first phase difference between the debug signal and the reference signal in the kth channel comprises:
(1) taking the fourth channel as a debugging channel, that is, k is equal to 4, when the phase shifters of the four channels of the array antenna are in the first phase state during debugging, the signal vectors in the four channels are respectively
And
the four signal vectors are combined to obtain a first combined vector
And combining the first resultant vector
As reference vectors, i.e. vectors corresponding to said reference signals, signal vectors in three channels other than the fourth channel
And
the synthesis yields an intermediate synthesis vector of
As shown in fig. 9, fig. 9 is a schematic diagram of the relationship among the signal vectors, the intermediate composite vectors and the composite vectors in the four channels of the array antenna, wherein the first composite vector is
Amplitude K of 1 The first power of the first composite signal, which can be measured by a power meter, is determined, assuming a signal vector
Has an amplitude of A 4 Intermediate composite vector of
Has an amplitude of C 4 Of a signal vector
And intermediate synthetic vector
Is set to theta 4 Then in the vector
Vector
And a vector
Applying cosine theorem to the formed vector triangle, the following formula can be obtained according to formula 2:
(2) and continuing to use the fourth channel as a debugging channel, and adjusting the phase shifter in the fourth channel to be in a second phase state, wherein the additional phase shift of the second phase state relative to the first phase state is 90 degrees (namely the additional phase shift of the phase shifter is increased by 90 degrees on the basis of the first phase state), the phase states of the phase shifters in other channels are not changed, and the signal vector vectors in the four channels of the array antenna are adjusted to be in a second phase state
And
a second resultant vector may be synthesized
As shown in fig. 9, wherein the second resultant vector
Amplitude K of 2 The signal vector can be determined by the second power of the second composite signal measured by the power meter
Is still A 4 As shown in fig. 9, then in the vector
Vector
And a vector
Applying cosine law in the formed vector triangle, and obtaining the following formula according to the formula 2:
(3) continuing to use the fourth channel as a debugging channel, adjusting the phase shifter in the fourth channel to a third phase state, wherein the additional phase shift of the second phase state relative to the first phase state is 180 degrees (i.e. the additional phase shift of the phase shifter is increased by 180 degrees on the basis of the first phase state), the phase shifters in other channels are not changed, and the signal vectors of the signals in the four channels of the array antenna are not changed
And
a second resultant vector may be synthesized
As shown in fig. 9, wherein the third resultant vector
Amplitude K of 3 The signal vector may be determined by a third power of a third composite signal measured by a power meter
Is still A 4 Then in the vector
Vector
And a vector
Applying cosine law in the formed vector triangle, and obtaining the following formula according to the formula 2:
the two sides of the above formula 3 and formula 5 are subtracted respectively to obtain:
the two sides of the above formula 3 and formula 4 are subtracted respectively to obtain:
substituting equation 6 into equation 7 yields:
from the above equations 6 and 8, the following equations can be obtained
In obtaining a signal vector
And a reference vector
Angle theta therebetween 4 Then, the formula can be expressed by formula 3, formula 4, formula 5 and θ 4 Obtaining intermediate resultant vectors
Amplitude C of 4 And a signal vector
Amplitude A of 4 。
(4) Determining a signal vector from step (3)
And intermediate synthetic vector
Angle theta therebetween 4 Intermediate composite vector
Amplitude C of 4 And a signal vector
Amplitude A of 4 The signal vector may then be encoded
Is shown as
Reference vector
Is shown as
Setting signal vector
And a reference vector
Included angle therebetween is
Then, according to the calculation formula of the included angle between the vectors, it can be obtained:
the signal vector can be determined according to the above equation 10
And a reference vector
Angle therebetween
I.e. the first phase difference between the debug signal and the reference signal in the fourth channel.
In determining a signal vector
And a reference vector
Angle therebetween
Then, the phase shifter in the fourth channel is adjusted to be in the first phase state, then the third channel is taken as a debugging channel, and according to the steps, under the condition that the phase shifter of the third channel is in three different phase states, the first phase difference between the debugging signal and the reference signal of the third channel of the phase shifter in the first phase state is determined
Then, the phase shifter in the third channel is adjusted to the first phase state, the second channel is taken as a debugging channel, and under the condition that the phase shifter of the second channel is in three different phase states, the first phase difference between the debugging signal and the reference limit number in the second channel of the phase shifter in the first phase state is determined
Until a first phase difference between the debugging signal and the reference signal in the first channel of the phase shifter in the first phase state is obtained
In the embodiment of the present application, the first channel to the fourth channel are determined as described aboveThe order of the phase difference between the signal in the track and the reference signal is merely an example, and cannot be understood as a specific limitation.
In determining a signal vector
To
And a reference vector
Angle therebetween
To
Then, if the first channel is selected as the reference channel, the debugging signal in the first channel is the reference signal, and the signal vector in the first channel is
And a reference vector
Angle therebetween
Is the phase difference between the reference signal and the reference signal in the first channel, i.e. the reference phase difference, and the signal vector in the other three channels and the signal vector in the reference channel
The included angle therebetween can be obtained by the following formula:
wherein the content of the first and second substances,
is the angle between the signal vector and the reference vector in the k-th channel except the first channel, i.e. the target phase difference between the debugging signal and the reference signal in the k-th channel except the reference channel, alpha k1 The included angle between the signal vector of the debug signal in the kth channel and the signal vector of the reference signal, that is, the difference between the target phase difference and the reference phase difference of the debug signal in the kth channel. After determining the difference between the target phase difference and the reference phase difference in the other three channels, the additional phase shift of the phase shifter is increased or decreased (e.g., α) based on the difference between the target phase difference and the reference phase difference in each of the other three channels k1 Decreasing when it is greater than 0 and increasing when it is less than 0), that is, the phases of the debug signals in the other three channels can be calibrated to be the same as the phase of the reference signal, as shown in fig. 10, fig. 10 shows an effect diagram after the signals in each channel are calibrated by implementing the multi-channel phase calibration method provided by the present application.
In the embodiment of the present application, the phase shifter may directly shift the phase of the received analog signal, for example, the phase of the signal in each channel is shifted by using methods such as resistance-capacitance phase shifting, transformer phase shifting, and inductive voltage divider phase shifting, or the received analog signal is digitized first, and the digital phase shifter is used to shift the phase and then convert the phase-shifted signal into the analog signal.
In this embodiment, when determining the first phase difference between the debug signal and the reference signal, the additional phase shift of the second phase state relative to the first phase state or the third phase state relative to the second phase state may be pi/2, or pi/8, pi/6, pi/5, pi/4, pi/3, 2 pi/3, pi, 5 pi/4, 3 pi/2, 7 pi/4, and the like, which is not limited in this embodiment.
In another embodiment of the present application, the foregoing principle may also be used for phase calibration between multiple channels when the array antenna is in a transmission mode, as shown in fig. 11, fig. 11 is a schematic diagram of another array antenna multi-channel phase calibration system provided in the embodiment of the present application, where a signal source is connected to an input end of a power division network of an array antenna, the power division network divides a signal sent by the signal source into n channels of signals according to equal or unequal power, and outputs the n channels of the array antenna to n transmission antennas of the array antenna, the n transmission antennas of the array antenna transmit n identical test signals to a single reception antenna connected to a power meter, and the single reception antenna receives a synthesized signal synthesized by the n test signals by a spatial power synthesis method, and sends the synthesized signal to the power meter. In the embodiment of the present application, the method for implementing signal phase calibration in each channel of the array antenna is the same as that when the array antenna is in the receiving mode, and the embodiment of the present application is not elaborated in detail.
In the method for calibrating the multi-channel phase of the array antenna, n channels of the array antenna are opened simultaneously to receive or transmit signals, and the debugging signal in each channel is obtained after interference including mutual coupling effect, so that the phase difference between the debugging signal and the reference signal in each channel determined by the method is the phase difference obtained under the condition that the mutual coupling effect exists, namely the phase difference caused by the mutual coupling effect exists in the phase difference, when the array antenna is calibrated according to the second phase difference obtained by the method, the phase difference of the signals among the channels caused by the mutual coupling effect can be compensated, and the influence of the mutual coupling effect on the signal phase in the channels in the traditional array antenna channel phase calibration is overcome. Furthermore, because a vector network analyzer is adopted in the traditional calibration scheme for calibration, a multimeter in the radio frequency field is called as the king of the instrument and is expensive in price when the vector network analyzer is used, and in the array antenna multichannel phase calibration method, a signal source and a power meter can be adopted to replace the vector network analyzer in the traditional calibration scheme, so that the hardware cost during calibration can be reduced.
Based on the above principle, the present application also provides an array antenna multi-channel phase calibration apparatus, as shown in fig. 12, the phase calibration apparatus 100 includes: a determination unit 101 and an adjustment unit 102.
The determining unit 101 is configured to determine, when n channels of the array antenna are enabled, a first phase difference between a debug signal and a reference signal of each of the n channels of the array antenna, where the first phase difference includes a reference phase difference and a target phase difference, the reference phase difference is a phase difference between the debug signal and the reference signal of a reference channel of the n channels, and the target phase difference is a phase difference between the debug signal and the reference signal of each of n-1 channels other than the reference channel, where the reference channel is any one of the n channels, and n is a positive integer greater than or equal to 2;
the determining unit 101 is further configured to determine, according to a difference between the target phase difference and the reference phase difference, a second phase difference between the debug signal of each of the n-1 channels and a reference signal, where the reference signal is a debug signal in a reference channel;
the adjusting unit 102 is configured to adjust the phase shifter in each of the n-1 channels according to the second phase difference between the debug signal and the reference signal in each of the n-1 channels, so that the phase of the debug signal in each of the n-1 channels is the same as the phase of the reference signal.
The phase calibration apparatus further includes a power obtaining unit 103, where the power obtaining unit 103 is configured to obtain power of a synthesized signal synthesized by the n debug signals in the n channels.
Specifically, the determining unit 101 is configured to support the multi-channel phase calibration apparatus to perform steps S20 and S21 in fig. 3, steps S201 and S202 in fig. 4, and step S2014 in fig. 5, and the like, the adjusting unit 102 is configured to perform step S22 in fig. 3 after the determining unit 101 determines the second phase difference in step S21, and the power obtaining unit 103 is configured to obtain the first power of the first synthesized signal in step S2011, obtain the second power of the second synthesized signal in step S2012, and obtain the third power of the third synthesized signal in step S2013.
The determining unit 101 may be a processor or a controller, and may be a Central Processing Unit (CPU), or a combination of a CPU and a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof. The power acquisition unit 103 may be a device capable of measuring signal power, such as a power meter.
It will be appreciated that the multi-channel phase calibration apparatus, in order to implement the above-described functions, includes corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative elements and method steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiment of the present application, the multi-channel phase calibration apparatus may be divided into functional units according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that, in the embodiment of the present application, the division of the unit is schematic, and is only one logic function division, and when the actual implementation is realized, another division manner may be provided.
Referring to fig. 13, fig. 13 is a schematic structural diagram of a phase calibration apparatus according to an embodiment of the present application, and as shown in fig. 13, the phase calibration apparatus 300 at least includes: processor 310, transceiver 320, power measurement module 330, and memory 340, with processor 310, transceiver 320, power measurement module 330, and memory 340 being connected by bus 350.
The processor 310 may be a Central Processing Unit (CPU) or a combination of a CPU and a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.
The transceiver 320 may include a receiver and a transmitter, such as a radio frequency module, and the processor 310 described below receives or transmits a message, which is specifically understood to be the processor 310 receiving or transmitting through the transceiver.
The power measurement module 330 may be a module capable of measuring signal power, such as a power meter.
The Memory 340 includes, but is not limited to, a Random Access Memory (RAM), a Read-Only Memory (ROM), or an Erasable Programmable Read-Only Memory (EPROM or flash Memory), and the Memory 340 is used for storing relevant instructions and data and transmitting the stored data to the processor 310.
In this embodiment, the receiver in the transceiver 320 receives a synthesized signal synthesized by the n channels of the array antenna, and sends the synthesized signal to the power measurement module 330, the power measurement module 330 measures the power of the synthesized signal, and sends the power of the synthesized signal to the processor 310, and the processor 310 may finally determine the phase difference between the debugging signal and the reference signal in each channel of the array antenna according to the different power values of the synthesized signal of the phase shifters in each channel of the array antenna in different phase states. The specific implementation of each operation of the phase calibration device refers to the above method embodiment, and is not described herein again.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (14)
1. A method of phase calibration, comprising:
enabling n channels of the array antenna, wherein n is an integer greater than or equal to 2;
determining a reference phase difference of a reference channel and respective target phase differences of other n-1 channels, wherein the reference channel is any one of the n channels, and the reference phase difference is a phase difference between a debugging signal and a reference signal of the reference channel; the target phase difference is the phase difference between the debugging signals of the n-1 channels and the reference signals;
and calibrating the phases of the n-1 channels based on the respective target phase differences of the n-1 channels and the reference phase difference.
2. The method of claim 1,
the kth phase difference is determined according to a phase difference between the debug signal in the kth channel and the intermediate composite signal, an amplitude of the debug signal in the kth channel, and an amplitude of the intermediate composite signal, wherein the kth channel is any one of the n channels, the intermediate composite signal is a composite signal synthesized by the debug signals in the remaining n-1 channels except the kth channel, and k is a positive integer less than or equal to n.
3. The method of claim 2,
the kth phase difference is determined according to the phase difference between the debug signal in the kth channel and the intermediate composite signal, the amplitude of the debug signal in the kth channel, and the amplitude of the intermediate composite signal, in combination with a vector algorithm.
4. The method of claim 2, wherein determining the phase difference between the debug signal in the kth channel and the intermediate composite signal, the amplitude of the debug signal in the kth channel, and the amplitude of the intermediate composite signal comprises:
determining amplitudes of at least three synthesized signals synthesized by the debugging signals of the n channels when the phase shifter of the k channel is in at least three different phase states, wherein the different phase states are states of the phase shifter in different additional phase shifts, and the amplitudes of the at least three synthesized signals are in one-to-one correspondence with the at least three different phase states;
and determining the phase difference between the debugging signal in the kth channel and the intermediate synthetic signal, the amplitude of the debugging signal in the kth channel and the amplitude of the intermediate synthetic signal by combining a cosine law according to the amplitudes of the at least three synthetic signals.
5. The method of claim 4, wherein determining the magnitudes of at least three synthesized signals synthesized by the n channels of debug signals when the phase shifter for the k channel is in at least three different phase states comprises:
acquiring first power of a first synthesized signal, and determining the amplitude of the first synthesized signal according to the first power, wherein the first synthesized signal is a synthesized signal synthesized by debugging signals of the n channels when a phase shifter of a kth channel is in a first phase state;
acquiring second power of a second synthesized signal, and determining the amplitude of the second synthesized signal according to the second power, wherein the second synthesized signal is a synthesized signal synthesized by debugging signals of the n channels when the phase shifter of the kth channel is in a second phase state;
and acquiring third power of a third composite signal, and determining the amplitude of the third composite signal according to the third power, wherein the third composite signal is a composite signal synthesized by debugging signals of the n channels when the phase shifter of the kth channel is in a third phase state.
6. The method of claim 5, wherein determining the phase difference between the debug signal in the kth channel and the intermediate composite signal, the amplitude of the debug signal in the kth channel, and the amplitude of the intermediate composite signal according to the amplitudes of the at least three composite signals in combination with a cosine theorem comprises:
determining a phase difference between the debug signal in the kth channel and the intermediate composite signal, an amplitude of the debug signal in the kth channel, and an amplitude of the intermediate composite signal according to the following formulas:
wherein, C k Is the amplitude of the intermediate composite signal, A k Is the amplitude, θ, of the debug signal in the k-th channel k For the phase difference, γ, between the debug signal and the intermediate composite signal in the k-th channel 1 For an additional phase shift, γ, of the phase shifter in the first phase state 2 For an additional phase shift, γ, of the phase shifter in the second phase state 3 For an additional phase shift of the phase shifter in a third phase state, K 1 Is the amplitude, K, of the first composite signal 2 Is the amplitude, K, of said second composite signal 3 Is the amplitude of the third composite signal.
7. The method of claim 5, wherein the first power of the first composite signal, the second power of the second composite signal, and the third power of the third composite signal are obtained from a power meter.
8. The method according to any one of claims 2 to 6,
determining a phase difference between a debug signal and a reference signal in the kth channel according to the following formula:
wherein A is k For the amplitude of the debug signal in said k-th channel, C k Is the amplitude, theta, of the intermediate composite signal k For the phase difference between the debug signal and the intermediate composite signal in the kth channel,
represents a debug signal in the k-th channel,
representing the intermediate composite signal, is then,
is the phase difference between the debug signal and the reference signal in the kth channel.
9. The method according to claim 5 or 6, wherein the first phase state is a state when the additional phase shift of the phase shifter of the k-th channel is 0; the second phase state is a state when the additional phase shift of the phase shifter of the kth channel is pi/2; the third phase state is a state when the additional phase shift of the phase shifter of the kth channel is pi.
10. A method for determining a phase difference between channels of an array antenna, comprising:
determining amplitudes of at least three synthesized signals synthesized by debugging signals of n channels of the array antenna when a phase shifter of a kth channel in the array antenna is in at least three different phase states; wherein the kth channel is any one of the n channels, the different phase state is a state of the phase shifter at different additional phase shifts, and amplitudes of the at least three synthesized signals correspond to the at least three different phase states one to one;
determining a phase difference between the debugging signal in the k-th channel and an intermediate composite signal, an amplitude of the debugging signal in the k-th channel and an amplitude of the intermediate composite signal according to the amplitudes of the at least three composite signals, wherein the intermediate composite signal is a composite signal synthesized by the debugging signals in the rest n-1 channels except the k-th channel;
determining a phase difference between the debugging signal in the kth channel and the reference signal, a phase difference between the debugging signal in the kth channel and the intermediate composite signal, an amplitude of the debugging signal in the kth channel, and an amplitude of the intermediate composite signal;
and determining the phase difference between the channels of the array antenna according to the phase difference between the debugging signal of each channel of the n channels and the reference signal.
11. The method of claim 10, wherein determining the amplitudes of at least three composite signals synthesized by the n channels of the array antenna when the phase shifter for the k channel in the array antenna is in at least three different phase states comprises:
acquiring first power of a first synthesized signal, and determining the amplitude of the first synthesized signal according to the first power, wherein the first synthesized signal is a synthesized signal synthesized by debugging signals of the n channels when a phase shifter of a kth channel is in a first phase state;
acquiring second power of a second synthesized signal, and determining the amplitude of the second synthesized signal according to the second power, wherein the second synthesized signal is a synthesized signal synthesized by debugging signals of the n channels when the phase shifter of the kth channel is in a second phase state;
and acquiring third power of a third composite signal, and determining the amplitude of the third composite signal according to the third power, wherein the third composite signal is a composite signal synthesized by debugging signals of the n channels when the phase shifter of the kth channel is in a third phase state.
12. The method of claim 1, wherein the reference signal is any one of the first synthesized signal, the second synthesized signal, or the third synthesized signal.
13. A phase calibration device comprising a processor, a transceiver, a power measurement module and a memory, the processor, the transceiver, the power measurement module and the memory being interconnected, wherein the memory is configured to store application program code and the processor is configured to invoke the program code to perform the method of claims 1 to 9.
14. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to claims 1 to 9.
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| PCT/CN2018/092928 WO2020000204A1 (en) | 2018-06-26 | 2018-06-26 | Phase alignment method, related apparatus, and device |
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| JP3444270B2 (en) * | 2000-05-23 | 2003-09-08 | 日本電気株式会社 | Array antenna receiver calibration system |
| CN101483273B (en) * | 2009-02-24 | 2012-06-13 | 中国航天科技集团公司第五研究院第五○四研究所 | Calibration method for amplitude and phase variable array antenna |
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