Fast independent real-time self-calibration method for transmitting channel of phased-array antenna

Abstract

The invention discloses a fast and independent real-time self-calibration method for a phased-array antenna transmitting channel, which belongs to the technical field of phased-array antennae, and comprises the following steps: determining an acquisition channel, placing a channel to be calibrated in a transmitting state, placing the acquisition channel in a load state, and reading detection amplitude information and a reference vector; keeping the channel state of one to-be-calibrated channel unchanged, and adjusting the phase of the other to-be-calibrated channel to obtain amplitude data of each acquisition channel of the other to-be-calibrated channel in different phase shift states; based on the amplitude data and the reference vector, calculating to obtain an initial phase difference value of the to-be-calibrated channel; based on the detection amplitude information and the initial phase difference value, taking the target to-be-calibrated channel as a reference, and obtaining an amplitude value and a relative phase difference of each to-be-calibrated channel; the invention aims to solve the problems that the existing independent real-time self-calibration method for the transmitting channel of the phased-array antenna is tedious in process and complex in method, is limited by environments, equipment, sites and technicians, and cannot independently realize real-time array plane monitoring and channel calibration compensation.

Description

Technical Field

[0001] The invention relates to the technical field of phased array antennas, and in particular to a fast independent real-time self-calibration method for a phased array antenna transmission channel. Background Art

[0002] With the rapid development of phased array antenna technology in the field of wireless communications, the system has higher and higher requirements for important performance indicators of phased array antennas, such as sidelobe level, gain, and beam pointing. Therefore, the phased array antenna must calibrate the amplitude and phase of the radiation of each channel array element before leaving the factory. The amplitude and phase accuracy of all channel-related array elements are important factors affecting the electrical performance of the phased array antenna. The phased array antenna controls the compensation values ​​of the phase shifter and attenuator through the wave control system, and performs differentiated compensation for the amplitude and phase of the array, thereby achieving the best radiation performance of the phased array antenna. After delivery to the customer, the phased array antenna also needs to test and diagnose the performance of the phased array antenna from time to time.

[0003] Real-time self-calibration of phased array antennas means that during the use of phased array antennas, the antennas can perform performance tests on the amplitude and phase of the array at any time and anywhere; diagnose and screen out failed array elements, and evaluate performance in real time; independently measure and adjust the amplitude and phase of each channel of the array to ensure good radiation characteristics of the phased array antenna. This will achieve health monitoring of the phased array antenna throughout its life cycle. At present, according to the different injection or acquisition points of the measurement signal, the basic methods of phased array antenna array monitoring are divided into two types: "internal monitoring" and "external monitoring". The existing traditional near-field and far-field calibration commonly used phase commutation method, modulation method and mutual coupling method all fall into the category of these two basic methods.

[0004] However, whether it is "external monitoring" or "internal monitoring", external computers and supporting test equipment are required, including computers, control equipment, vector network analyzers, signal sources, spectrum analyzers, etc. Some self-calibration methods use multiple sub-arrays after analog-to-digital circuit conversion, which can achieve simultaneous transmission and reception in the digital domain, thereby realizing channel or sub-array calibration. However, this method will accumulate errors in multi-level RF devices and integrated circuits, deteriorating the calibration accuracy. This makes the realization of array monitoring and calibration functions highly dependent on external resources and human and technical capabilities, resulting in extremely high testing costs, and poor real-time performance in evaluating the performance of phased array antennas.

[0005] Currently, the independent real-time self-calibration method of the phased array antenna transmitting channel is mostly achieved by relying on external test equipment or multiple receiving sub-arrays. The process is cumbersome and the method is complicated. It is limited by the environment, equipment, site and technical personnel, and it is impossible to independently realize real-time array monitoring and channel calibration compensation. Summary of the invention

[0006] The purpose of the present invention is to provide a method for fast independent real-time self-calibration of a phased array antenna transmission channel, so as to solve the problems that the current method for independent real-time self-calibration of a phased array antenna transmission channel is cumbersome, complex, limited by the environment, equipment, site and technical personnel, and cannot independently realize real-time array surface monitoring and channel calibration compensation, thereby improving the global fast calibration accuracy and realizing channel amplitude and phase performance monitoring and precise automatic compensation.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] On the one hand, this specification provides a phased array antenna transmission channel fast independent real-time self-calibration method, comprising:

[0009] Step 102, determine the acquisition channel, put the channel to be calibrated in the transmitting state, put the acquisition channel in the load state, and read the detection amplitude information and reference vector corresponding to the channel to be calibrated;

[0010] Step 104, keeping the channel state of one channel to be calibrated unchanged, adjusting the phase of another channel to be calibrated to change in sequence according to the initial phase shift step, and obtaining the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated;

[0011] Step 106, calculating and obtaining an initial phase difference value of the channel to be calibrated based on the amplitude data and the reference vector;

[0012] Step 108, based on the detection amplitude information and initial phase difference value of each channel to be calibrated, taking the target channel to be calibrated as a reference, obtaining the amplitude value and relative phase difference of each channel to be calibrated;

[0013] Step 110: Perform phase compensation based on the relative phase difference of each channel to be calibrated to complete the self-calibration of the channel.

[0014] On the other hand, the present specification provides a phased array antenna transmission channel fast independent real-time self-calibration device, comprising:

[0015] The reference vector determination module is used to determine the acquisition channel, put the channel to be calibrated in the transmitting state and the acquisition channel in the load state, and read the detection amplitude information and reference vector corresponding to the channel to be calibrated;

[0016] An amplitude data acquisition module is used to keep the channel state of a channel to be calibrated unchanged, adjust the phase of another channel to be calibrated to change in sequence according to the initial phase shift step, and obtain the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated;

[0017] An initial phase difference calculation module is used to calculate the initial phase difference value of the channel to be calibrated based on the amplitude data and the reference vector;

[0018] The relative phase difference calculation module is used to obtain the amplitude value and relative phase difference of each channel to be calibrated based on the detection amplitude information and initial phase difference value of each channel to be calibrated and taking the target channel to be calibrated as a reference;

[0019] The channel phase self-calibration module is used to perform phase compensation based on the relative phase difference of each channel to be calibrated to complete the channel self-calibration.

[0020] Based on the above technical solution, this specification can achieve the following technical effects:

[0021] 1. Utilizing the coupling characteristics between channels of phased array antenna array, a method for real-time monitoring of phased array antenna array and adaptive channel calibration compensation is proposed, which realizes the real-time amplitude and phase performance monitoring and channel self-calibration compensation of the phased array antenna array receiving and transmitting channels. It has the characteristics of high calibration accuracy, strong practicality and wide applicability.

[0022] 2. The phased array antenna real-time monitoring and channel self-calibration method is based on the improved rotating electric field vector and mutual coupling method. Combined with the optimized self-calibration strategy, it can efficiently and accurately realize the performance monitoring and adaptive compensation of channel amplitude and phase.

[0023] 3. This method obtains the amplitude information of the codeword format by adding a silicon-based detection circuit to the front end of the RF chip. When calibrating the transmit channel, no other receiving sub-arrays or other test equipment are required, and real-time channel self-calibration can be performed independently.

[0024] 4. This method shortens the test time by using multi-channel simultaneous calculation, and ensures the test accuracy by using two-dimensional difference.

[0025] 5. This method only needs to obtain the amplitude information of the channel, and then obtains the phase difference information of each channel by processing the amplitude information. Therefore, it is not limited by the frequency response characteristics of the RF device, especially in the millimeter wave and higher frequency bands, and can achieve higher calibration accuracy.

[0026] 6. This method does not directly obtain the absolute value information of the channel phase. It uses the IQ two-way phase difference calculation to achieve calibration, improve the anti-interference ability, effectively increase the accuracy of calibration, and reduce the impact of test errors and environment on the calibration effect.

[0027] 7. This method is not limited to the position layout of the phased array antenna array unit, and can be applied to the triangular position layout or rectangular position layout of the array unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a flow chart of a method for rapid independent real-time self-calibration of a phased array antenna transmission channel in one embodiment of the present invention.

[0029] Figure 2 Schematic diagram of the coupling path between channels in the horizontal direction and the energy vector transmission direction diagram in the case of a rectangular array in one embodiment of the present invention.

[0030] Figure 3 It is a schematic diagram of the aggregate port amplitude data and the corresponding relationship curve in one embodiment of the present invention.

[0031] Figure 4 FIG. 2 is a schematic diagram of two-dimensional interpolation in one embodiment of the present invention.

[0032] Figure 5 The present invention is a schematic structural diagram of a phased array antenna transmission channel fast independent real-time self-calibration device according to an embodiment of the present invention.

[0033] Figure 6 The figure is a schematic diagram of an electronic device according to the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are all in very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0035] It should be noted that, in order to clearly explain the content of the present invention, the present invention specifically cites multiple embodiments to further illustrate different implementations of the present invention, wherein the multiple embodiments are enumerated rather than exhaustive. In addition, for the sake of brevity of explanation, the contents mentioned in the previous embodiments are often omitted in the subsequent embodiments. Therefore, the contents not mentioned in the subsequent embodiments can refer to the previous embodiments accordingly.

[0036] Example 1

[0037] Please refer to Figure 1 , Figure 1 The figure shows a phased array antenna transmission channel fast independent real-time self-calibration method provided by this embodiment. In this embodiment, the method includes:

[0038] Step 102, determine the acquisition channel, put the channel to be calibrated in the transmitting state, put the acquisition channel in the load state, and read the detection amplitude information and reference vector corresponding to the channel to be calibrated;

[0039] Optionally, one implementation of step 102 is:

[0040] Step 202, based on the position of the channel to be calibrated, determining the acquisition channel corresponding to the channel to be calibrated; the channel to be calibrated is two emission channels that are horizontally adjacent or vertically adjacent;

[0041] Step 204, turn on the channel to be calibrated and put it in the transmitting state, put the acquisition channel in the load state, read the detection amplitude information corresponding to the channel to be calibrated and the amplitude detection information of the channel to be calibrated coupled to all acquisition channels;

[0042] Step 206, based on the amplitude detection information, obtaining an energy synthesis vector of the channel to be calibrated coupled to all acquisition channels;

[0043] Step 208: Obtain a reference vector based on the energy synthesis vector.

[0044] Step 104, keeping the channel state of one channel to be calibrated unchanged, adjusting the phase of another channel to be calibrated to change in sequence according to the initial phase shift step, and obtaining the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated;

[0045] In this embodiment, one implementation of step 104 is:

[0046] The channel state of one channel to be calibrated is kept unchanged, and the phase shifter of another channel to be calibrated is controlled by the wave control system in the phased array antenna, so that the phase of the other channel to be calibrated changes within the range of 0 to 360° with an initial phase shift step, and the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated is obtained.

[0047] Step 106, calculating and obtaining an initial phase difference value of the channel to be calibrated based on the amplitude data and the reference vector;

[0048] In this embodiment, the amplitude data includes a power vector of another channel to be calibrated and a synthesized vector; the synthesized vector is an energy vector of each acquisition channel coupled to another channel to be calibrated;

[0049] In this embodiment, one implementation of step 106 is:

[0050] Step 302, calculating and obtaining a synthetic vector based on the amplitude data and the reference vector;

[0051] In this embodiment, one implementation of step 302 is:

[0052] Step 3021, calculating the difference between the reference vector and the synthesized vector to obtain a first difference;

[0053] Step 3022: Add the first difference to the power vector to obtain a composite vector.

[0054] Step 304, based on the synthesized vector, the synthesized vector, and the reference vector, calculate and obtain the coupling phase difference of the channel to be calibrated;

[0055] In this embodiment, one implementation of step 304 is:

[0056] Step 3041, based on the amplitude value and phase value of the synthesized vector and the reference vector, calculate and obtain the relative amplitude and relative phase of the synthesized vector and the reference vector;

[0057] Step 3042, simplifying and modulo-finding the synthesized vector based on the relative amplitude and the relative phase to obtain a modulus value of the synthesized vector;

[0058] Step 3043, obtaining a target variable based on the synthetic vector modulus and the reference vector; the target variable is used to characterize the change relationship between the synthetic vector and the reference vector;

[0059] Step 3044: Based on the maximum value of the target variable, the coupling phase difference of the channel to be calibrated is calculated.

[0060] Step 306: Based on the coupling phase difference of the channel to be calibrated, an initial phase difference value of the channel to be calibrated is calculated.

[0061] In this embodiment, the coupling phase difference of the channel to be calibrated includes an I-channel coupling phase difference and a Q-channel coupling phase difference;

[0062] In this embodiment, one implementation of step 306 is:

[0063] The average value of the I-channel coupling phase difference and the Q-channel coupling phase difference is calculated as the initial phase difference value of the channel to be calibrated.

[0064] In this embodiment, after step 104, the following steps are further included:

[0065] Step 402, obtaining the number of original phase shifter bits based on the initial phase shift step;

[0066] Step 404, calculating and obtaining a new phase shifter bit number based on the original phase shifter bit number and the interpolation dimension;

[0067] Step 406, obtaining a new phase shift step based on the new phase shifter bit number;

[0068] Step 408, keeping the channel state of one channel to be calibrated unchanged, adjusting the phase of another channel to be calibrated to change in sequence according to the new phase shift step, and obtaining new amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated.

[0069] In this embodiment, after step 106, the following steps are included:

[0070] Step 502, based on the position coordinates of the channel to be calibrated, obtaining the positioning midpoint coordinates of the two channels to be calibrated;

[0071] Step 504 , based on the phase position relationship between each acquisition channel and the positioning midpoint coordinate and the phase difference of each acquisition channel, two-dimensional interpolation is performed to obtain an adjusted initial phase difference.

[0072] Step 108, based on the detection amplitude information and initial phase difference value of each channel to be calibrated, taking the target channel to be calibrated as a reference, obtaining the amplitude value and relative phase difference of each channel to be calibrated;

[0073] Step 110: Perform phase compensation based on the relative phase difference of each channel to be calibrated to complete the self-calibration of the channel.

[0074] Specifically, the specific implementation method is as follows:

[0075] The first step, reference Figure 2 , divide the phased array antenna surface into regions according to the channel scale, and select the transmission channels C1, C2, C3, C4 to be calibrated and the multi-channel simultaneous calibration information acquisition channels Q11-I(Q), Q12-I(Q), Q21-I(Q), Q22-I(Q) according to the positions of the channels to be calibrated;

[0076] The second step is to turn on channels C2 and C3 in the transmitting state, and the multi-channel simultaneous calibration information acquisition channels Q11-I (Q), Q12-I (Q), Q21-I (Q), Q22-I (Q) (collection channels for short) are all in the load state, and read the output detection amplitude information E of channels C2 and C3. C2 、E C3 , and read the energy synthesis vector of C2 and C3 channels coupled to each acquisition channel The corresponding amplitude detection information E0;

[0077] Where E C2 、E C3 , channel transmission amplitude detection information for channels C2 and C3;

[0078] The energy vector synthesized by each acquisition channel is the reference vector

[0079]

[0080] The third step is to keep the state of C3 channel unchanged, and control the phase shifter of C2 channel through the wave control system in the phased array antenna to adjust the phase of C2 channel from 0 to 360°, with a phase shift step of Δ (such as ), the synthetic electric field vector Rotate the phase according to the number of phase shifters (assuming N bits), 0 to π rotation, a total of 2 N phase states. Where n=1,2,3,…,2 N , the phase of the nth state is

[0081] Due to the use of the improved method of multi-channel simultaneous calibration and two-dimensional difference, the phase step can be adaptively adjusted. The relationship between the phase step and the difference dimension is: N0 = NN C . Where N0 is the number of equivalent phase shifters after adjustment, N is the number of original (equivalent) phase shifters, and N C is the interpolation dimension, and the phase shift step is

[0082] At this time, the power vector of C2 channel is

[0083] The energy vector of each acquisition channel coupled to the C2 channel is the synthesized vector

[0084]

[0085] The fourth step is to read the amplitude data E of each acquisition channel, and obtain the amplitude data and corresponding relationship curve of the collective port corresponding to different phase shift states of the C2 channel, refer to Figure 3 It can be seen that the acquisition channel amplitude data E changes with the change of the C2 channel phase.

[0086] along with Phase changes at each acquisition channel and The resultant energy vector It can be expressed as:

[0087]

[0088] Step 5: Since the coupling paths from the acquisition channel to the C2 channel and the C3 channel are different, the coupling phase difference IΔ from each acquisition channel to the C2 channel and from each acquisition channel to the C3 channel can be obtained according to the amplitude information of the acquisition channel. 23 (QΔ 23 ). The phase difference can be calculated by the following formula:

[0089] Define the synthesized vector With the reference vector The relative amplitude is k and the relative phase is X:

[0090]

[0091] The calculation formula is derived, split, and extracted After simplification, we can get:

[0092]

[0093] Substitution Simplifying and modulo we can get:

[0094]

[0095] Define the variable Q to characterize the change of the synthesized energy vector and the reference vector. When Q is the largest, the vector phases are the same, and when Q is the smallest, the vector phases are opposite:

[0096]

[0097] After simplification, we can get:

[0098] Q = (cos(X)-k) 2 +sin 2 X+k 2 +2k{(cos(X)-k)cos(Δ)-sin(X)sin(Δ)}

[0099] Define the substitution variable Y 2 : Y 2 =(cos(X)-k) 2 +sin 2 X

[0100] The above formula can be changed to:

[0101] Q=(Y) 2 +k 2 +2kYcos(Δ+Δ0)

[0102] By calculation, we can get the phase difference Δ0 between the 8 channels of C2 and C3 when Q is the largest, i.e., IΔ 23 (QΔ 23 ).

[0103] The sixth step is to calculate the actual initial phase difference between the C2 channel and the C3 channel, that is, the initial phase of the C2 channel. Initial phase with C3 channel The difference (4 channels) is calculated by using the IQ two-channel differential calculation method to reduce the impact of the environment on the calibration accuracy and improve the robustness of the method:

[0104]

[0105] Step 7. According to the relative positions of the four acquisition channels and the channels to be calibrated, the coordinates of each acquisition channel are Q11: (x1, y1), Q12: (x1, y2), Q21: (x2, y1), Q22: (x2, y2)

[0106] Where (x1, y1) is the coordinate of Q11; (x1, y2) is the coordinate of Q12; (x2, y1) is the coordinate of Q21; (x2, y2) is the coordinate of Q22; (x, y) is the coordinate of the positioning midpoint of C2 and C3 channels;

[0107]

[0108] The phase difference between the C2 channel and the C3 channel is obtained by two-dimensional interpolation. See the interpolation diagram for details. Figure 4 .

[0109] Step 8. Repeat steps 2 to 7 to get the initial phase of channel C1. Initial phase with C4 channel The difference, that is:

[0110]

[0111] Step 9. After completing the horizontal channel calibration, reselect the vertical multi-channel simultaneous calibration information acquisition channel and repeat steps 1 to 8 to obtain the E corresponding to channels C1, C2 and C4, C3. C1 、E C4 and E and IΔ 12 , QΔ 12 , IΔ 43 , QΔ 43 , the initial phase difference between the C1 channel and the C2 channel, and the initial phase difference between the C4 channel and the C3 channel can be obtained through calculation.

[0112] Step 10: After calculation in step 9, the phase difference of all channels based on a certain channel (C1 channel) is obtained.

[0113] So far, the amplitudes of the four calibration channels C1, C2, C3, and C4 are obtained: E C1 、E C2 、E C3 、E C4 And phase: After compensating the obtained phase difference, adaptive calibration of the array can be achieved.

[0114] Based on this, this method realizes independent, real-time performance monitoring of the phased array antenna transmission channel and adaptive calibration compensation during use. This method only requires the channel's detection amplitude information to achieve channel amplitude and phase calibration. At the same time, this method does not rely on external test equipment, has strong applicability, and its application form is not limited by the phased array antenna array layout, and has great application and promotion potential.

[0115] In summary, the technical effects of this method are as follows:

[0116] (1) Utilizing the coupling characteristics between channels of phased array antenna arrays, a method for real-time monitoring of phased array antenna arrays and adaptive channel calibration compensation is proposed. This method realizes the real-time amplitude and phase performance monitoring and channel self-calibration compensation functions of the phased array antenna array transceiver channels. It has the characteristics of high calibration accuracy, strong practicality and wide applicability.

[0117] (2) The phased array antenna real-time monitoring and channel self-calibration method is based on the improved rotating electric field vector and mutual coupling method. Combined with the optimized self-calibration strategy, it can efficiently and accurately realize the performance monitoring and adaptive compensation of channel amplitude and phase.

[0118] (3) This method obtains the amplitude information of the codeword format by adding a silicon-based detection circuit to the front end of the RF chip. When calibrating the transmit channel, no other receiving sub-arrays or other test equipment are required, and real-time channel self-calibration can be performed independently.

[0119] (4) This method shortens the test time by performing multi-channel simultaneous calculations and ensures test accuracy through two-dimensional interpolation.

[0120] (5) This method only needs to obtain the amplitude information of the channel, and then obtains the phase difference information of each channel by processing the amplitude information. Therefore, it is not limited by the frequency response characteristics of the RF device, especially in the millimeter wave and higher frequency bands, and can achieve higher calibration accuracy.

[0121] (6) This method does not directly obtain the absolute value information of the channel phase. It uses the IQ two-way phase difference calculation to achieve calibration, improve the anti-interference ability, effectively increase the accuracy of calibration, and reduce the impact of test errors and environment on the calibration effect.

[0122] (7) This method is not limited to the position layout of the phased array antenna array elements, and can be applied to both triangular position layout and rectangular position layout of the array elements.

[0123] Example 2

[0124] Please refer to Figure 5 , Figure 5 The figure shows a phased array antenna transmission channel fast independent real-time self-calibration device provided by this embodiment. In this embodiment, the device includes:

[0125] The reference vector determination module is used to determine the acquisition channel, put the channel to be calibrated in the transmitting state and the acquisition channel in the load state, and read the detection amplitude information and reference vector corresponding to the channel to be calibrated;

[0126] An amplitude data acquisition module is used to keep the channel state of a channel to be calibrated unchanged, adjust the phase of another channel to be calibrated to change in sequence according to the initial phase shift step, and obtain the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated;

[0127] An initial phase difference calculation module is used to calculate the initial phase difference value of the channel to be calibrated based on the amplitude data and the reference vector;

[0128] The relative phase difference calculation module is used to obtain the amplitude value and relative phase difference of each channel to be calibrated based on the detection amplitude information and initial phase difference value of each channel to be calibrated and taking the target channel to be calibrated as a reference;

[0129] The channel phase self-calibration module is used to perform phase compensation based on the relative phase difference of each channel to be calibrated to complete the channel self-calibration.

[0130] Optionally, the reference vector determination module includes:

[0131] An acquisition channel determination unit, used to determine the acquisition channel corresponding to the channel to be calibrated based on the position of the channel to be calibrated; the channel to be calibrated is two horizontally adjacent or vertically adjacent transmission channels;

[0132] The amplitude detection unit is used to turn on the channel to be calibrated and put it in the transmitting state, and put the acquisition channel in the load state, and read the detection amplitude information corresponding to the channel to be calibrated and the amplitude detection information of the channel to be calibrated coupled to all acquisition channels;

[0133] An energy synthesis calculation unit, used for obtaining an energy synthesis vector of the channel to be calibrated coupled to all acquisition channels based on amplitude detection information;

[0134] The reference vector calculation unit is used to obtain a reference vector based on the energy synthesis vector.

[0135] Optionally, an amplitude data acquisition module is used to keep the channel state of a channel to be calibrated unchanged, and control the phase shifter of another channel to be calibrated through the wave control system in the phased array antenna, so that the phase of the other channel to be calibrated changes within the range of 0 to 360° with an initial phase shift step, thereby obtaining the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated.

[0136] Optionally, the amplitude data includes a power vector of another channel to be calibrated and a synthesized vector; the synthesized vector is an energy vector of each acquisition channel coupled to another channel to be calibrated;

[0137] Optionally, the initial phase difference calculation module includes:

[0138] A synthetic vector calculation unit, used for calculating and obtaining a synthetic vector based on the amplitude data and the reference vector;

[0139] A coupling phase difference calculation unit, used for calculating the coupling phase difference of the channel to be calibrated based on the synthesized vector, the synthesized vector and the reference vector;

[0140] The initial phase difference value calculation unit is used to calculate and obtain the initial phase difference value of the channel to be calibrated based on the coupling phase difference of the channel to be calibrated.

[0141] Optionally, the synthetic vector calculation unit includes:

[0142] A difference calculation subunit, used for calculating the difference between the reference vector and the synthesized vector to obtain a first difference;

[0143] The synthetic vector calculation subunit is used to add the first difference to the power vector to obtain a synthetic vector.

[0144] Optionally, the coupling phase difference calculation unit includes:

[0145] A relative information calculation subunit, used for calculating the relative amplitude and relative phase of the synthesized vector and the reference vector based on the amplitude and phase values ​​of the synthesized vector and the reference vector;

[0146] A synthetic vector modulus subunit, used for simplifying the synthetic vector based on the relative amplitude and relative phase to obtain a synthetic vector modulus value;

[0147] A target variable definition subunit is used to obtain a target variable based on the synthetic vector modulus and the reference vector; the target variable is used to characterize the change relationship between the synthetic vector and the reference vector;

[0148] The coupling phase difference calculation subunit is used to calculate the coupling phase difference of the channel to be calibrated based on the maximum value of the target variable.

[0149] Optionally, the coupling phase difference of the channel to be calibrated includes an I-channel coupling phase difference and a Q-channel coupling phase difference;

[0150] Optionally, the initial phase difference value calculation unit is used to calculate the average value of the I-channel coupling phase difference and the Q-channel coupling phase difference as the initial phase difference value of the channel to be calibrated.

[0151] Optionally, also include:

[0152] An original phase shifter bit number calculation module is used to obtain the original phase shifter bit number based on the initial phase shift step;

[0153] A new phase shifter bit number calculation module, used for calculating the number of new phase shifter bits based on the number of original phase shifter bits and the interpolation dimension;

[0154] A new phase shift step calculation module, used for obtaining a new phase shift step based on the number of bits of the new phase shifter;

[0155] The phase adjustment module is used to keep the channel state of one channel to be calibrated unchanged, adjust the phase of another channel to be calibrated to change in sequence according to the new phase shift step, and obtain new amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated.

[0156] Optionally, also include:

[0157] A positioning midpoint coordinate module is used to obtain the positioning midpoint coordinates of two channels to be calibrated based on the position coordinates of the channels to be calibrated;

[0158] The two-dimensional interpolation module is used to perform two-dimensional interpolation based on the phase position relationship between each acquisition channel and the positioning midpoint coordinate and the phase difference of each acquisition channel to obtain the adjusted initial phase difference.

[0159] Based on this, this device method realizes independent, real-time performance monitoring of the phased array antenna transmission channel and adaptive calibration compensation during use. The amplitude and phase calibration of the channel can be achieved only with the detection amplitude information of the channel. At the same time, it does not rely on external test equipment, has strong applicability, and its application form is not restricted by the layout of the phased array antenna, and has great potential for application promotion.

[0160] Example 3

[0161] Please refer to Figure 6 , this embodiment provides an electronic device, which includes a processor, an internal bus, a network interface, a memory and a non-volatile memory, and of course may also include hardware required for other services. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it, forming a phased array antenna transmission channel fast independent real-time self-calibration method at the logical level. Of course, in addition to software implementation, this specification does not exclude other implementation methods, such as logic devices or a combination of software and hardware, etc., that is, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0162] The network interface, processor and memory can be connected to each other through a bus system. The above bus can be divided into an address bus, a data bus, a control bus, etc.

[0163] The memory is used to store programs. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory may include a read-only memory and a random access memory, and provides instructions and data to the processor.

[0164] The processor is used to execute the program stored in the above memory, and specifically perform:

[0165] Step 102, determine the acquisition channel, put the channel to be calibrated in the transmitting state, put the acquisition channel in the load state, and read the detection amplitude information and reference vector corresponding to the channel to be calibrated;

[0166] Step 104, keeping the channel state of one channel to be calibrated unchanged, adjusting the phase of another channel to be calibrated to change in sequence according to the initial phase shift step, and obtaining the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated;

[0167] Step 106, calculating and obtaining an initial phase difference value of the channel to be calibrated based on the amplitude data and the reference vector;

[0168] Step 108, based on the detection amplitude information and initial phase difference value of each channel to be calibrated, taking the target channel to be calibrated as a reference, obtaining the amplitude value and relative phase difference of each channel to be calibrated;

[0169] Step 110: Perform phase compensation based on the relative phase difference of each channel to be calibrated to complete the self-calibration of the channel.

[0170] The processor may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method may be completed by an integrated logic circuit of the processor hardware or by instructions in the form of software.

[0171] Based on the same invention, the embodiment of this specification also provides a computer-readable storage medium, which stores one or more programs. When the one or more programs are executed by an electronic device including multiple application programs, the electronic device executes Figure 1-Figure 4 A corresponding embodiment provides a method for rapid independent real-time self-calibration of a phased array antenna transmission channel.

[0172] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems, or computer program products. Therefore, this specification may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this specification may take the form of a computer program product implemented on one or more computer-readable storage media containing computer-usable program code.

[0173] In addition, for the above-mentioned specific implementation of the system, since it is basically similar to the method implementation, the description is relatively simple, and the relevant parts can be referred to the partial description of the method implementation. Moreover, it should be noted that in each module of the system of the present application, the components therein are logically divided according to the functions to be implemented, but the present application is not limited thereto, and the components can be re-divided or combined as needed.

[0174] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences between it and other embodiments.

[0175] The above is a description of a specific embodiment of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the specific order or sequential order shown in the process depicted in the drawings is not necessarily required to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0176] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A fast independent real-time self-calibration method for a phased array antenna transmission channel, characterized in that: include: Determine the acquisition channel, put the channel to be calibrated in the transmitting state and the acquisition channel in the loading state, and read the detection amplitude information and reference vector corresponding to the channel to be calibrated; Keep the channel state of one channel to be calibrated unchanged, adjust the phase of another channel to be calibrated to change in sequence according to the initial phase shift step, and obtain the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated; Based on the amplitude data and the reference vector, an initial phase difference value of the channel to be calibrated is calculated; Based on the detection amplitude information and initial phase difference value of each channel to be calibrated, taking the target channel to be calibrated as a reference, the amplitude value and relative phase difference of each channel to be calibrated are obtained; Phase compensation is performed based on the relative phase difference of each channel to be calibrated to complete the self-calibration of the channel.

2. The method according to claim 1, characterized in that The step of determining the acquisition channel, placing the channel to be calibrated in a transmitting state, placing the acquisition channel in a load state, and reading the detection amplitude information and reference vector corresponding to the channel to be calibrated includes: Based on the position of the channel to be calibrated, determining the acquisition channel corresponding to the channel to be calibrated; the channel to be calibrated is two emission channels that are horizontally adjacent or vertically adjacent; Turn on the channel to be calibrated and put it in the transmitting state, and put the acquisition channel in the load state, and read the detection amplitude information corresponding to the channel to be calibrated and the amplitude detection information of the channel to be calibrated coupled to all acquisition channels; Based on the amplitude detection information, an energy synthesis vector of the channel to be calibrated coupled to all acquisition channels is obtained; Based on the energy synthesis vector, a reference vector is obtained.

3. The method according to claim 2, characterized in that The step of keeping the channel state of one channel to be calibrated unchanged, adjusting the phase of another channel to be calibrated to change in sequence according to the initial phase shift step, and obtaining the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated includes: The channel state of one channel to be calibrated is kept unchanged, and the phase shifter of another channel to be calibrated is controlled by the wave control system in the phased array antenna, so that the phase of the other channel to be calibrated changes within the range of 0 to 360° with an initial phase shift step, and the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated is obtained.

4. The method according to claim 3, characterized in that The amplitude data includes a power vector of another channel to be calibrated and a synthesized vector; the synthesized vector is an energy vector of each acquisition channel coupled to another channel to be calibrated; The step of calculating the initial phase difference value of the channel to be calibrated based on the amplitude data and the reference vector includes: Based on the amplitude data and the reference vector, a synthetic vector is obtained by calculation; Based on the synthesized vector, the synthesized vector and the reference vector, the coupling phase difference of the channel to be calibrated is calculated; Based on the coupling phase difference of the channel to be calibrated, an initial phase difference value of the channel to be calibrated is obtained by calculation.

5. The method according to claim 4, characterized in that The step of calculating and obtaining a synthetic vector based on the amplitude data and the reference vector comprises: Calculate the difference between the reference vector and the synthesized vector to obtain a first difference; The first difference is added to the power vector to obtain a resultant vector.

6. The method according to claim 5, characterized in that The step of calculating the coupling phase difference of the channel to be calibrated based on the synthesized vector, the synthesized vector, and the reference vector includes: Based on the amplitude value and phase value of the synthesized vector and the reference vector, the relative amplitude and relative phase of the synthesized vector and the reference vector are calculated; Simplifying and modulating the synthetic vector based on the relative amplitude and relative phase to obtain a synthetic vector modulus value; Based on the synthetic vector modulus and the reference vector, a target variable is obtained; the target variable is used to characterize the change relationship between the synthetic vector and the reference vector; Based on the maximum value of the target variable, the coupling phase difference of the channel to be calibrated is calculated.

7. The method according to claim 6, characterized in that The coupling phase difference of the channel to be calibrated includes an I-channel coupling phase difference and a Q-channel coupling phase difference; The step of calculating the initial phase difference value of the channel to be calibrated based on the coupling phase difference of the channel to be calibrated includes: The average value of the I-channel coupling phase difference and the Q-channel coupling phase difference is calculated as the initial phase difference value of the channel to be calibrated.

8. The method according to claim 3, characterized in that After the channel state of one channel to be calibrated is kept unchanged, the phase of another channel to be calibrated is adjusted to change in sequence according to the initial phase shift step, and the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated is obtained, the method further includes: Based on the initial phase shift step, the number of bits of the original phase shifter is obtained; Based on the number of bits of the original phase shifter and the interpolation dimension, the number of bits of the new phase shifter is calculated; Based on the number of new phase shifter bits, a new phase shift step is obtained; The channel state of one channel to be calibrated is kept unchanged, and the phase of another channel to be calibrated is adjusted to change in sequence according to the new phase shift step, so as to obtain new amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated.

9. The method according to claim 8, characterized in that After calculating the initial phase difference value of the channel to be calibrated based on the amplitude data and the reference vector, the method further includes: Based on the position coordinates of the channels to be calibrated, the positioning midpoint coordinates of the two channels to be calibrated are obtained; Based on the phase position relationship between each acquisition channel and the positioning midpoint coordinate and the phase difference of each acquisition channel, two-dimensional interpolation is performed to obtain the adjusted initial phase difference.

10. A phased array antenna transmission channel fast independent real-time self-calibration device, characterized in that: include: The reference vector determination module is used to determine the acquisition channel, put the channel to be calibrated in the transmitting state and the acquisition channel in the load state, and read the detection amplitude information and reference vector corresponding to the channel to be calibrated; An amplitude data acquisition module is used to keep the channel state of a channel to be calibrated unchanged, adjust the phase of another channel to be calibrated to change in sequence according to the initial phase shift step, and obtain the amplitude data of each acquisition channel under different phase shift states of the other channel to be calibrated; An initial phase difference calculation module is used to calculate the initial phase difference value of the channel to be calibrated based on the amplitude data and the reference vector; The relative phase difference calculation module is used to obtain the amplitude value and relative phase difference of each channel to be calibrated based on the detection amplitude information and initial phase difference value of each channel to be calibrated and taking the target channel to be calibrated as a reference; The channel phase self-calibration module is used to perform phase compensation based on the relative phase difference of each channel to be calibrated to complete the channel self-calibration.

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