Rapid phase synchronization calibration method for multipath vector signals
Through the fast phase synchronization calibration method of multiple vector signals, the phase shifter angle value is calculated and set using circuit modules such as signal source, power divider, and phase shifter, which solves the problems of low synchronization accuracy and efficiency in multi-channel signal synthesis, and achieves efficient and fast signal synthesis.
Patent Information
- Application Number
- CN202510605824.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2025-07-25
AI Technical Summary
In the existing multi-channel signal synthesis technology, synchronization accuracy and efficiency are difficult to improve simultaneously, and hardware consistency cannot guarantee the synchronization accuracy between multiple signals, resulting in poor system synthesis effect.
The fast phase synchronization calibration method of multiple vector signals is adopted, and the angular value of the phase shifter is calculated and set through circuit modules such as signal source, power divider, phase shifter, coupler, switching network and reception channel to achieve efficient signal synthesis using simple comparison and table lookup steps.
It realizes high-precision synchronization with a phase difference of ≤10° between multiple signals, and has a shorter synchronization time, which is suitable for various application scenarios where signal synchronization is required.
Smart Images
Figure CN120378077A_ABST
Abstract
Description
Technical Field
[0001] The present invention mainly relates to the field of radio technology, and particularly to a fast phase synchronization calibration method for multi-channel vector signals. Background Art
[0002] Constrained by factors such as physical size, cost-effectiveness ratio, and realizability, the output signal power of a single device cannot be increased infinitely. To meet the requirements of electronic systems such as communication and radar for high-power signals, signal synthesis of multiple channels is usually adopted, and the effect of signal synthesis depends on the synchronization accuracy between multiple channels. Due to factors such as differences in electronic devices and tolerances in assembly processes, ensuring the synchronization accuracy between multiple channels through hardware consistency cannot achieve good results. Therefore, synchronization calibration technology has become the key to ensuring the synthesis effect of the system. Summary of the Invention
[0003] The purpose of the present invention is to solve the synthesis efficiency problem of existing multi-channel signals, and provide a fast phase synchronization calibration method for multi-channel vector signals, which realizes the efficient synthesis of signals through simple steps such as comparison and look-up table.
[0004] The present invention provides a fast phase synchronization calibration method for multi-channel vector signals, including the following steps: Step 1: Use a fast phase synchronization calibration circuit for multi-channel vector signals, where the circuit includes a signal source, a power divider, N phase shifters, N couplers, a switch network, a receiving channel, and a sampling and analysis circuit module; Step 2: Obtain the original calibration signal: The signal source generates a calibration signal Y = aX(ωt + φ), which is divided into N paths through the power divider, and the N-path signals respectively pass through the phase shifters and couplers, and the N-path radio frequency signals are sent to the switch network; Step 3: Under the control of the system signal, the switch network sequentially sends the N-path radio frequency signals and the signals after pairwise synthesis of the N-path radio frequency signals to the receiving channel; Step 4: The receiving channel transforms the frequency of the received radio frequency signal to a frequency suitable for ADC sampling, and performs analysis and processing after completing the A / D conversion; Step 5: Through sampling and analysis, calculate relationship table, The relationship table is an efficiency-phase difference table, is the synthesis efficiency, is the angle value corresponding to the phase shifter; Step 6: For the calculated synthesis efficiency of pairwise synthesis of the N-path radio frequency signals, find the angle value corresponding to the phase shifter by querying the efficiency-phase difference table , and set the N phase shifters to the corresponding angle values.
[0005] Further, it further includes step 7: through steps 1 to 6, the synthesis efficiency of pairwise synthesis of N RF signals is greater than or equal to 0.95.
[0006] Further, N is 4. A signal source generates a calibration signal Y = aX(ωt + φ), which is divided into 4 paths by a power divider. The 4 paths of signals respectively pass through phase shifters and couplers, and the 4 paths of coupled signals 、 、 、 are sent to a switching network. Under the control of the system signal, the switching network sequentially sends Y1, Y2, Y3, Y4 and the signal Y after synthesis of Y1 and Y2 12 、the signal Y after synthesis of Y1 and Y3 13 、the signal Y after synthesis of Y1 and Y4 14 to a receiving channel. The receiving channel transforms the frequency of the received RF signal to a frequency suitable for ADC sampling, and after completing the A / D conversion, it performs analysis and processing.
[0007] Further, the method for analysis and processing in step 4 includes the following steps: S1: Through sampling and analysis, obtain the powers of signals Y1, Y2, Y3, Y4, Y 12 、Y 13 、Y 14 ; 、 、 、 、 、 、 ; S2: Calculate and record , , , , , , , , ; S3: Let ,According to the cosine theorem, ,So the square of the synthesis efficiency is ,where 、 、 and are the amplitudes of the signals, and L and m are intermediate variables set for the simplicity of the formula; Let , , ,So (1), (2) , (3); S4: Calculate according to formulas (1) to (3) , , relation table.
[0008] Furthermore, N is 4, and the signal source generates a calibration signal , where , with a power of 0 dBm and a pulse width of , which is divided into 4 paths by a power divider. The 4 paths of signals pass through phase shifters and couplers respectively, and the 4 paths of coupled signals , , , are sent to the switch network. Under the control of the system signal, the switch network sequentially sends Y1, Y2, Y3, Y4 and the signal Y synthesized by Y1 and Y2 12 , the signal Y synthesized by Y1 and Y3 13 , the signal Y synthesized by Y1 and Y4 14 to the receiving channel. The receiving channel transforms the frequency of the received RF signal to a frequency suitable for ADC sampling, and performs analysis and processing after completing the A / D conversion.
[0009] Advantageous effects: The present invention provides a fast phase synchronization calibration method for multi-channel vector signals. Compared with the existing multi-channel signal synchronization methods, the synchronization time of the present invention is shorter and the synchronization accuracy is higher, and the phase difference between multi-signals can be ≤10°; compared with the prior art, the present invention is more flexible and can be widely applied in various application scenarios requiring signal synchronization. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 is the calibration principle block diagram of the fast phase synchronization calibration method for multi-channel vector signals according to the embodiment of the present invention; Figure 2 is the switch network principle block diagram of the fast phase synchronization calibration method for multi-channel vector signals according to the embodiment of the present invention; Figure 3 is the effect diagram of the fast phase synchronization calibration method for multi-channel vector signals according to the embodiment of the present invention; Figure 4 is the synthesis schematic diagram of 2 vector signals according to the embodiment of the present invention; Figure 5 is the test site diagram of the fast phase synchronization calibration method for multi-channel vector signals according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0011] As Figures 1 to 5 shown, the present invention provides a fast phase synchronization calibration method for multi-channel vector signals. Embodiment
[0012] A fast phase synchronization calibration method for multi-channel vector signals is as shown in the appendix Figure 1 (for the convenience of description, taking the calibration of 4-channel signals as an example, the calibration principle of multi-channel signals is the same). The signal source generates a calibration signal Y = aX(ωt + φ), which is divided into 4 channels by a power divider. The 4-channel signals pass through phase shifters and couplers respectively, and the 4-channel coupled signals 、 、 、 are sent to the switching network.
[0013] The principle block diagram of the switching network is as shown in Figure 2 . Under the control of the system signal, the switching network sequentially sends Y1, Y2, Y3, Y4 and the synthesized signal Y of Y1 and Y2 12 , the synthesized signal Y of Y1 and Y3 13 , the synthesized signal Y of Y1 and Y4 14 to the receiving channel. The receiving channel transforms the received RF signal frequency to the appropriate frequency for ADC sampling, and after completing the A / D conversion, it is analyzed and processed. The analysis and processing method is as follows: After sampling and analysis, the powers of signals Y1, Y2, Y3, Y4, Y 12 , Y 13 , Y 14 are obtained 、 、 、 、 、 、 ; Calculate and record , , , , , , , , ; Referring to Figure 4 as shown, let , according to the cosine theorem: .
[0014] So the square of the synthesis efficiency is: .
[0015] Let , , , so (1), (2), (3); According to formulas (1) to (3), calculate 、 、 relationship table (abbreviated as efficiency-difference table).
[0016] According to the calculated 、 、 , by referring to the efficiency-difference table, find the corresponding included angle value, and set the phase shifters 1, 2, 3, and 4 in Figure 1 to the corresponding angle values; Repeat the above steps to make 、 、 all greater than or equal to 0.95. Embodiment
[0017] Combined with the attached Figure 1 , use an example to further describe the technical solution of the present invention in detail. The attached Figure 5 is the system sample test equipment platform.
[0018] A fast phase synchronization calibration method circuit for multi-channel vector signals mainly includes the following circuit modules: signal source, power splitter, phase shifter, coupler, switch network, receiving channel, sampling and analysis, etc. circuit modules. The main steps are as follows: Step 1: Obtain the original calibration signal: The signal source generates a calibration signal , with a power of 0 dBm and a pulse width (for ease of description, unless otherwise specified, the pulse width of the signal waveform in the subsequent description of this document is defaulted to , and the signal analytical formula is not marked anymore). It is divided into 4 paths by a power splitter, and the 4 paths of signals pass through phase shifters and couplers respectively, and the 4 paths of coupled signals 、 、 、 are sent to the switch network.
[0019] The principle block diagram of the switch network is as shown in Figure 2 . Under the control of the system signal, the switch network sequentially connects 、 、 、 and with to synthesize the signal 、 and to synthesize the signal 、 After combining with the synthesized signal is sent to the receiving channel. The receiving channel converts the frequency of the received RF signal to a frequency suitable for ADC sampling, and the ADC samples and stores the above signal.
[0020] After calculation, the insertion loss powers of the power divider, phase shifter, coupler, switch network, and cable are -8dB, -2dB, -10dB, -9dB, and 4dB respectively, and the total power loss is 33dB. The gain of the receiving channel is 33dB. Therefore, the power loss of the front link from the signal source to before ADC sampling is equivalently 0dB.
[0021] Step 2: Calculation and analysis: After sampling, obtain , , , , , , , and calculate to obtain: , , , , , , , , , , , , .
[0022] Obtain: , , , , , .
[0023] Step 3: Obtain the phase shift value by looking up the table: According to , , , calculate , , relationship table (abbreviated as efficiency-phase difference table), as shown in Table 1.
[0024]
[0025]
[0026]
[0027]
[0028]
[0029] According to the look-up table, , , the corresponding differences are 79°, 75°, and 81° respectively. Set the attachment Figure 1 in , , .
[0030] Step 4: Calculation and verification Repeat Step 1 and Step 2, and calculate to obtain , , , achieving the expected effect, and the synchronization effect is as shown in the attachment Figure 3 .
[0031] The present invention provides a fast phase synchronization calibration method for multi-channel vector signals. Compared with the existing multi-channel signal synchronization methods, the synchronization time of the present invention is shorter and the synchronization accuracy is higher, and the phase difference between multiple signals can be ≤10°; compared with the prior art, the present invention is more flexible and can be widely applied to various application scenarios requiring signal synchronization.
[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A fast phase synchronization calibration method for multi-channel vector signals, characterized in that including the following steps: Step 1: Use a fast phase synchronization calibration circuit for multi-channel vector signals, which includes a signal source, a power divider, N phase shifters, N couplers, a switching network, a receiving channel, and a sampling and analysis circuit module; Step 2: Obtain the original calibration signal: The signal source generates a calibration signal Y = aX(ωt + φ), which is divided into N channels by the power divider. The N-channel signals pass through the phase shifters and couplers respectively, and the N-channel RF signals are sent to the switching network; Step 3: Under the control of the system signal, the switching network sequentially sends the N-channel RF signals and the signals synthesized by combining the N-channel RF signals in pairs to the receiving channel; Step 4: The receiving channel transforms the frequency of the received RF signal to a frequency suitable for ADC sampling, and performs analysis and processing after completing the A / D conversion; Step 5: Through sampling and analysis, calculate relation table, The relation table is an efficiency-phase difference table, is the synthesis efficiency, is the angle value corresponding to the phase shifter; Step 6: For the synthesis efficiency obtained by pairwise synthesis of the calculated N RF signals, find the corresponding angular value of the phase shifter by querying the efficiency-phase difference table. and set the N phase shifters to the corresponding angular values.
2. The fast phase synchronization calibration method for multi-channel vector signals according to claim 1, characterized in that It also includes Step 7: Through Steps 1 to 6, the synthesis efficiency of the synthesis of the N-channel RF signals in pairs is greater than or equal to 0.
95.
3. The fast phase synchronization calibration method for multi-channel vector signals according to claim 1 or 2, characterized in that N is 4. The signal source generates a calibration signal Y = aX(ωt + φ), which is divided into 4 paths by a power divider. The 4 paths of signals respectively pass through phase shifters and couplers, and the 4 paths of coupled signals , , , are sent to a switching network. Under the control of the system signal, the switching network sequentially sends Y1, Y2, Y3, Y4 and the signal Y after synthesizing Y1 and Y2 12 , the signal Y after synthesizing Y1 and Y3 13 , the signal Y after synthesizing Y1 and Y4 14 to the receiving channel. The receiving channel transforms the frequency of the received RF signal to a frequency suitable for ADC sampling, and after completing the A / D conversion, it is analyzed and processed.
4. The fast phase synchronization calibration method for multi-channel vector signals according to claim 3, characterized in that The method for analysis and processing in Step 4 includes the following steps: S1: Through sampling and analysis, obtain the power of signals Y1, Y2, Y3, Y4, Y 12 、Y 13 、Y 14 ; 、 、 、 、 、 、 ; S2: Calculate and record , , , , , , , , ; S3: Set , according to the cosine theorem, , so the square of the synthesis efficiency is , where , , and are the amplitudes of the signals, and L and m are intermediate variables set for the simplicity of the formula; Let , , So (1), (2), (3); S4: Calculate according to formulas (1) to (3) , , relationship table.
5. The fast phase synchronization calibration method for multi-channel vector signals according to claim 3, wherein N is 4, and the signal source generates a calibration signal , where , the power is 0 dBm, and the pulse width is . It is divided into 4 paths by a power divider. The 4 paths of signals pass through phase shifters and couplers respectively, and the 4 paths of coupled signals , , , are sent to the switch network. Under the control of the system signal, the switch network sequentially sends the signals Y1, Y2, Y3, Y4 and the signal Y 12 synthesized by Y1 and Y2, the signal Y 13 synthesized by Y1 and Y3, and the signal Y 14 synthesized by Y1 and Y4 to the receiving channel. The receiving channel transforms the frequency of the received RF signal to a frequency suitable for ADC sampling, and after completing the A / D conversion, it is analyzed and processed.