Method and device for dynamic real-time calibration of zero value of TT&C transponder

Abstract

The application provides a method and device for dynamically real-time calibration of zero value of a TT&C (Telemetry, Tracking and Command) transponder, and belongs to the technical field of space TT&C. The method comprises the following steps: sending an uplink measurement signal to the TT&C transponder to obtain a downlink measurement signal; performing frequency down-conversion on the uplink calibration signal to obtain a downlink calibration signal; performing radio frequency combination on the downlink measurement signal and the downlink calibration signal and converting the downlink measurement signal and the downlink calibration signal into a downlink measurement baseband signal and a downlink calibration baseband signal; determining an uplink measurement phase and a downlink measurement phase based on the downlink measurement baseband signal, obtaining a total zero value of a TT&C system based on the uplink measurement phase, the downlink measurement phase and a phase change rate reference; determining a downlink calibration phase based on the downlink calibration baseband signal, and obtaining a total delay of a calibration link based on the downlink calibration phase and the phase change rate reference; and obtaining a calibration result of the zero value of the transponder based on the total zero value of the TT&C system, the total delay of the calibration link, a fixed delay of the calibration link and a cable zero value. The application can improve the timeliness and precision of calibration.

Description

Technical Field

[0001] This application belongs to the field of aerospace measurement and control technology, and more specifically, it relates to a method and device for dynamic real-time calibration of zero value of measurement and control transponder. Background Technology

[0002] The telemetry, tracking, and command (TT&C) transponder is the core terminal equipment of the aerospace TT&C system. It mainly undertakes the functions of receiving uplink TT&C signals and outputting downlink ranging signals. The signal transmission delay inside the equipment is defined as zero. Zero-value calibration is a core testing link to ensure the accuracy of aerospace ranging, velocity measurement, and time synchronization, and directly determines the accuracy of spacecraft orbit calculation and status monitoring.

[0003] As space exploration missions evolve towards high-precision, long-duration on-orbit operation, spaceborne telemetry and control transponders face complex operating conditions such as temperature gradient changes and air pressure fluctuations during ground testing and on-orbit operation. This causes dynamic drift in the transmission delay of the internal radio frequency channels and baseband processing units, making it impossible to maintain constant zero-value parameters. Failure to perform real-time dynamic zero-value calibration directly leads to deviations in ranging data, resulting in errors in spacecraft orbit calculations and severely impacting the reliability of space missions. Therefore, it is urgent to achieve real-time dynamic zero-value calibration without affecting the normal operation of the equipment.

[0004] Currently, the industry commonly uses ground-based closed-loop calibration technology to achieve zero-value calibration of telemetry and control transponders. This technology relies on ground-based telemetry and control equipment to build a radio frequency loopback link, converting the uplink signal into a downlink frequency after frequency conversion and reconstruction to complete self-closed-loop time delay measurement. This existing technology has significant drawbacks. During calibration, the normal telemetry and control link between the transponder and the ground-based telemetry and control equipment must be disconnected. This physical disconnection avoids mutual interference between the loopback signal and the operational signal, preventing the zero-value calibration operation from being carried out in parallel with normal telemetry and control operations. Calibration and testing processes must be performed in a time-sharing manner, significantly extending the ground testing cycle. Furthermore, it cannot continuously monitor the dynamic drift of zero values ​​under complex operating conditions in real time, making it difficult to meet the dynamic calibration requirements of high-precision aerospace missions. Summary of the Invention

[0005] The purpose of this application is to provide a method and device for dynamic real-time calibration of zero value of telemetry and control transponders, so as to solve the problem that traditional calibration cannot meet the requirements of high-precision aerospace telemetry and control missions.

[0006] A first aspect of this application provides a method for dynamic real-time calibration of a zero value in a telemetry and control transponder, comprising: Generate uplink measurement signals and uplink calibration signals; send the uplink measurement signals to the telemetry and control transponder and obtain the downlink measurement signals output by the telemetry and control transponder; perform down-conversion processing on the uplink calibration signals to obtain the downlink calibration signals; the uplink measurement signals are uplink telemetry and control service signals carrying uplink telemetry and control data and uplink ranging pseudocode, and the uplink calibration signals are reference signals that are time-synchronized with the uplink measurement signals and obtained through frame reconstruction and pseudocode reconstruction; The downlink measurement signal and the downlink calibration signal are radio frequency combined and converted into downlink measurement baseband signal and downlink calibration baseband signal; The uplink and downlink measurement phases are determined based on the downlink measurement baseband signal. The total zero value of the measurement and control system is obtained based on the uplink measurement phase, downlink measurement phase, and phase change rate reference data. The downlink calibration phase is determined based on the downlink calibration baseband signal. The total delay of the calibration link is obtained based on the downlink calibration phase and phase change rate reference data. Based on the total zero value of the measurement and control system, the total delay of the calibration link, the fixed delay of the calibration link, and the pre-calibrated zero value of the cable, the zero value calibration result of the transponder is obtained.

[0007] A second aspect of this application provides a dynamic real-time calibration device for zero value of a telemetry and control transponder, comprising: The signal acquisition module is used to generate uplink measurement signals and uplink calibration signals; send the uplink measurement signals to the telemetry and control transponder and acquire the downlink measurement signals output by the telemetry and control transponder; perform down-conversion processing on the uplink calibration signals to obtain the downlink calibration signals; the uplink measurement signals are uplink telemetry and control service signals carrying uplink telemetry and control data and uplink ranging pseudocode, and the uplink calibration signals are reference signals that are time-synchronized with the uplink measurement signals and obtained through frame reconstruction and pseudocode reconstruction; The baseband conversion module is used to perform radio frequency combining of the downlink measurement signal and the downlink calibration signal and convert them into downlink measurement baseband signal and downlink calibration baseband signal; The dual-path delay calculation module is used to determine the uplink and downlink measurement phases based on the downlink measurement baseband signal, and to obtain the total zero value of the measurement and control system based on the uplink measurement phase, downlink measurement phase, and phase change rate reference data; it also determines the downlink calibration phase based on the downlink calibration baseband signal, and to obtain the total delay of the calibration link based on the downlink calibration phase and phase change rate reference data. The calibration result generation module is used to obtain the zero value calibration result of the transponder based on the total zero value of the measurement and control system, the total delay of the calibration link, the fixed delay of the calibration link, and the pre-calibrated zero value of the cable.

[0008] A third aspect of this application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to implement the steps of the above-described dynamic real-time calibration method for zero value of a measurement and control transponder.

[0009] In a fourth aspect of this application, a computer-readable storage medium is provided, which stores a computer program that, when executed by a processor, implements the steps of the above-described method for dynamic real-time calibration of the zero value of a measurement and control transponder.

[0010] The beneficial effects of the measurement and control transponder zero-value dynamic real-time calibration method and device provided in this application are as follows: This application embodiment does not require disconnecting the normal link between the telemetry and control transponder and the ground telemetry and control testing equipment throughout the calibration process. By synchronously generating uplink measurement signals and uplink calibration signals, the zero-value calibration process and telemetry and control services can be executed in parallel, completely eliminating the limitations of time-sharing operations, shortening the ground testing cycle, and meeting the requirements for efficient testing.

[0011] To address the issue of dynamic zero-value drift in transponders under complex operating conditions, this application's embodiment relies on frame reconstruction and pseudo-code reconstruction to ensure timing synchronization of the two signals. It eliminates signal interference through radio frequency combining and unified channel processing, and then calculates the total zero value of the system and the calibration link delay in real time based on phase parameters and reference data. Combining fixed delay and cable zero value, it accurately obtains the transponder zero-value calibration result, which can continuously monitor zero-value changes in real time and effectively avoid ranging errors and track calculation deviations caused by temperature and air pressure fluctuations.

[0012] Meanwhile, the embodiments of this application do not require hardware modification of the telemetry and control transponder, do not change the original working state of the equipment, reduce the complexity of calibration operations and the risk of equipment modification, and improve the convenience and stability of the calibration process while ensuring the accuracy of aerospace ranging, velocity measurement and time synchronization. It can fully meet the dynamic calibration requirements of high-precision aerospace exploration missions and provide reliable support for spacecraft orbit calculation and status monitoring. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A flowchart illustrating a method for dynamic real-time calibration of a zero value transponder provided in an embodiment of this application; Figure 2 A flowchart illustrating a method for dynamic real-time calibration of a zero value transponder provided in another embodiment of this application; Figure 3 This is a structural block diagram of a real-time dynamic calibration device for zero value of a telemetry and control transponder provided in an embodiment of this application; Figure 4 This is a schematic block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0015] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the following description will be provided in conjunction with the accompanying drawings and specific embodiments.

[0017] The ranging function of aerospace telemetry and control systems is typically implemented using phase delay ranging, which includes two forms: pseudo-random code phase ranging and carrier phase ranging. This embodiment focuses on pseudo-random code phase ranging, measuring the pseudo-random code phase. The essence of the transponder's zero value is the inherent pseudo-random code phase delay of the ranging link. The fixed time delay generated during signal transmission within the device is directly equivalent to a fixed offset of the pseudo-random code phase. The core of zero-value calibration is to accurately measure and eliminate the influence of this fixed phase offset on the ranging result. Pseudo-random code phase has the characteristics of strong anti-interference capability, low phase ambiguity, and a large delay measurement range. It can stably reflect the true transmission delay of the link and does not rely on carrier phase coherence, making it suitable for telemetry and control transponders operating in non-coherent mode. This application utilizes the linear correspondence between the pseudo-random code phase and the link delay, and achieves accurate extraction of the transponder's zero value through pseudo-random code phase difference calculation of co-originating dual signals.

[0018] Please refer to Figure 1 , Figure 1 This is a flowchart illustrating a method for dynamic real-time calibration of a telemetry and control transponder zero value according to an embodiment of this application. The method can be executed by an electronic device, which can be a ground-based telemetry and control detection device. The method may include: S101: Generate uplink measurement signal and uplink calibration signal; send uplink measurement signal to telemetry and control transponder, and obtain downlink measurement signal output by telemetry and control transponder; perform downconversion processing on uplink calibration signal to obtain downlink calibration signal; uplink measurement signal is uplink telemetry and control service signal carrying uplink telemetry and control data and uplink ranging pseudocode, and uplink calibration signal is reference signal obtained by frame reconstruction and pseudocode reconstruction and synchronized with uplink measurement signal timing.

[0019] In this embodiment, the downlink measurement signal is generated by the telemetry and control transponder in the following manner: the uplink measurement phase is extracted from the uplink measurement signal; the downlink carrier signal is determined based on preset downlink signal parameters; the downlink carrier signal is modulated; and the uplink measurement phase is loaded into the downlink carrier signal to obtain the downlink measurement signal.

[0020] In this embodiment, the uplink measurement signal can be a signal used to transmit telemetry and control commands and ranging references to the telemetry and control transponder. The uplink calibration signal can be a reference signal from the same source used to calibrate link delay, such as a radio frequency reference signal that shares the same carrier and sequence as the uplink measurement signal but differs only in pseudocode pattern. The telemetry and control transponder refers to the core aerospace telemetry and control equipment that receives the uplink signal. The downlink measurement signal refers to the downlink telemetry and control and ranging signal generated by the telemetry and control transponder after receiving the uplink measurement signal. Downconversion processing refers to the signal processing operation that converts the radio frequency signal frequency to the target downlink frequency. The downlink calibration signal refers to the calibration reference signal obtained after downconverting the uplink calibration signal. Uplink telemetry and control data refers to the telemetry and control commands and status configuration data transmitted to the telemetry and control transponder, such as transmit power configuration commands and operating mode switching commands.

[0021] Uplink ranging pseudo-random code refers to the pseudo-random code used as a ranging reference, such as the 10.23 MHz pseudo-random code rate and 1 millisecond period pseudo-random ranging code commonly used in aerospace telemetry and control. Frame reconstruction refers to adjusting the format of the uplink measurement signal's original data frame according to the standard frame structure of the downlink measurement signal: unifying the frame length, frame period, and data bit arrangement, and only replacing the intra-frame service data with calibration-specific reference data. For example, the uplink frame is reconstructed to a fixed length of 256 bits consistent with the downlink frame, ensuring complete synchronization of the data bit timing of the two signals after reconstruction. Pseudo-code reconstruction is performed after frame reconstruction. Pseudo-code reconstruction refers to maintaining the pseudo-code rate and pseudo-code period completely consistent with the ranging pseudo-code of the uplink measurement signal, only replacing the uplink service data with Gold code and then replacing it with a self-closing loop-specific orthogonal pseudo-code. For example, maintaining the 10.23 MHz pseudo-code rate and 1 millisecond pseudo-code period ensures complete synchronization of the pseudo-code timing of the two signals after reconstruction. Preset downlink signal parameters refer to fixed operating parameters that are pre-configured at the factory by the telemetry and control transponder and are unrelated to the uplink signal. These parameters include, for example, downlink carrier frequency, downlink signal modulation method, and downlink signal frame format.

[0022] This embodiment prioritizes disruptive operation, high precision, and ease of implementation. It employs a dual-signal architecture to ensure consistency between the calibration benchmark and the service signal, avoiding errors introduced by external calibration equipment. This embodiment generates downlink measurement signals using the telemetry and control transponder, eliminating the need to modify transponder hardware and preventing reliability degradation caused by redundant structures. This embodiment performs down-conversion processing on the uplink calibration signal to match its frequency with the downlink measurement signal, laying the foundation for subsequent common-channel processing. This embodiment focuses on uninterrupted telemetry and control services, no equipment modifications, and improved calibration accuracy, solving problems such as service interruption, hardware modification, and insufficient accuracy associated with traditional calibration methods.

[0023] For example, ground-based telemetry and control (TT&C) equipment can generate uplink TT&C data according to general aerospace TT&C specifications. This uplink TT&C data includes status configuration and control information such as TT&C transponder transmit power configuration commands. The ground-based TT&C equipment integrates and modulates the uplink TT&C data with a 10.23 MHz uplink ranging pseudocode according to a preset uplink frame format specification, and uses a 2025 MHz uplink carrier to complete signal modulation processing, generating a standard uplink measurement signal.

[0024] Ground-based telemetry and control equipment synchronously generates an uplink calibration signal. Following the 256-bit fixed frame structure and 256-millisecond frame period of the downlink measurement signal, frame reconstruction is performed to ensure complete consistency in frame format and data rate between the uplink calibration signal and the uplink measurement signal. Simultaneously, a self-closing loop-specific pseudocode is used for pseudocode reconstruction, maintaining a 10.23 MHz pseudocode rate and a 1-millisecond pseudocode period, adjusting only the pseudocode pattern to achieve signal differentiation. The uplink calibration signal also uses 2025 MHz uplink carrier modulation and is output through the same hardware RF channel as the uplink measurement signal, ensuring complete uniformity in timing, carrier, and transmission channel between the two signals.

[0025] Generated uplink measurement signal and uplink calibration signal As shown below: ; ; in, The uplink measurement signal modulation amplitude is the RF signal amplitude parameter of the uplink measurement signal. These are the uplink measurement signal data bits, which are used to carry the measurement and control data information in the uplink measurement signal. The uplink measurement signal pseudocode is a pseudo-random code used as the ranging reference in the uplink measurement signal. J characterizes the calibration link, where j is the imaginary unit and t is the time variable. The uplink carrier frequency is the radio frequency used for the uplink measurement signal. To calibrate the signal modulation amplitude, The uplink calibration signal data bits are used to carry the calibration reference data information of the uplink calibration signal. The frame structure corresponding to the uplink calibration signal data bits is strictly designed according to the data frame structure of the downlink measurement signal. Since the data transmission rate and frame period parameters of the uplink measurement signal frame and the downlink measurement signal frame are completely consistent, only the data content carried within the frame is different. Therefore, after the measurement data frame reconstruction process, the timing of the uplink calibration signal data bits is completely synchronized with the timing of the uplink measurement signal data bits.

[0026] The uplink calibration signal pseudocode uses a dedicated self-closing loop pseudocode. The pseudocode rate and period of this pseudocode are consistent with the corresponding parameters of the downlink measurement signal pseudocode sequence; only the pseudocode pattern differs to distinguish the signals. After pseudocode reconstruction, the timing of the calibration signal pseudocode is completely synchronized with the timing of the uplink measurement signal pseudocode. Uplink calibration signal With uplink measurement signal The same frequency radio frequency carrier is used for modulation, and both signals are transmitted through the same hardware radio frequency channel of the ground measurement and control equipment.

[0027] For example, this embodiment can generate uplink measurement signals. The signal is transmitted to the telemetry and control transponder. The transponder receives the uplink measurement signal transmitted from the ground, completes signal acquisition and tracking, and establishes phase synchronization with the uplink ranging pseudocode to determine the uplink measurement phase. The transponder records the pseudocode phase reference after synchronization with the uplink measurement signal; this phase is used to unify the timing start of the uplink and downlink pseudocodes. The transponder generates a downlink carrier using an internal independent frequency source; this carrier has no frequency correlation or phase coherence with the uplink carrier. The transponder independently generates downlink ranging pseudocode according to the preset downlink ranging pseudocode rate and downlink ranging pseudocode period. The transponder generates downlink data frames according to the preset downlink frame structure, loads the acquired uplink measurement phase into the downlink data frames, and modulates the downlink data and downlink ranging pseudocode together onto the independently generated downlink carrier to form a downlink measurement signal, which is then transmitted outwards.

[0028] For example, the uplink calibration signal maintains the same carrier characteristics, pseudocode timing, and frame structure as the uplink measurement signal, and is directly input to a high-stability mixer for mixing. The signal output after mixing is the downlink calibration signal. This downlink calibration signal retains all the characteristics of the uplink calibration signal after frame reconstruction and pseudocode reconstruction. The data bit timing, pseudocode rate, and period remain unchanged, and the carrier frequency is completely consistent with the downlink measurement signal output by the telemetry and control transponder. It can achieve interference-free RF combining with the downlink measurement signal, providing a stable and reliable source reference signal for subsequent co-channel reception processing and calibration calculation.

[0029] This embodiment requires no modification to the telemetry and control transponder hardware, avoiding the problems of increased size, power consumption, and reduced reliability caused by redundant structures. The calibration process does not interrupt telemetry and control services, achieving disturbance-free real-time calibration. This embodiment employs a dual-signal design with synchronized timing to ensure consistency between the calibration benchmark and the service signal processing path, effectively improving calibration accuracy. This embodiment utilizes the transponder's native coherent forwarding capability to generate downlink measurement signals, requiring no additional hardware support and simplifying the calibration process. Frame reconstruction and pseudocode reconstruction ensure signal format matching, and down-conversion processing enables co-channel signal reception, reducing the complexity of calibration operations and adapting to dynamic calibration needs in changing environments.

[0030] S102: Perform radio frequency combining on-line measurement signal and on-line calibration signal and convert them into on-line measurement baseband signal and on-line calibration baseband signal.

[0031] In this embodiment, the downlink measurement signal and the downlink calibration signal are radio frequency combined and converted into downlink measurement baseband signal and downlink calibration baseband signal, including: after radio frequency combining the downlink measurement signal and the downlink calibration signal, amplification, filtering, downconversion and analog-to-digital conversion are performed synchronously through the same channel to obtain the downlink measurement baseband signal corresponding to the downlink measurement signal and the downlink calibration baseband signal corresponding to the downlink calibration signal, respectively.

[0032] In this embodiment, RF combining refers to the signal integration operation of merging multiple RF signals into a single RF signal. For example, merging a downlink measurement signal and a downlink calibration signal into a single combined RF signal. This combined RF signal is then converted into a digital baseband signal, which includes both the downlink measurement baseband signal and the downlink calibration baseband signal. "Same channel" refers to a single hardware transmission and processing path used for signal processing. "Amplification" refers to a signal conditioning operation that increases the signal amplitude. "Filtering" refers to a signal purification operation that removes spurious interference from the signal. "Analog-to-digital conversion" refers to a signal format conversion operation that converts an analog RF signal into a digital baseband signal. "Downlink measurement baseband signal" refers to the digital baseband signal obtained after analog processing and digital conversion of the downlink measurement signal. "Downlink calibration baseband signal" refers to the digital baseband signal obtained after analog processing and digital conversion of the downlink calibration signal.

[0033] This embodiment employs a method of RF combining and synchronous processing in a common channel. The core objective is to eliminate amplitude, phase, and delay differences caused by different signal processing channels, ensuring complete consistency between the calibration reference and the processing conditions of the service signal. This embodiment completes amplification, filtering, down-conversion, and analog-to-digital conversion within the same channel, avoiding calibration errors introduced by inconsistencies in the hardware characteristics of multiple channels, while also simplifying the hardware architecture. Synchronous processing ensures timing alignment of the two signals, providing a precise reference for subsequent phase extraction and zero-value calculation. This embodiment improves calibration accuracy, simplifies system implementation, and ensures signal processing consistency, adapting to the application requirements of dynamic real-time calibration.

[0034] For example, downlink calibration signal Downlink measurement signal output by the telemetry and control transponder The signal undergoes radio frequency combining (RF) processing. The combined signal is then input to the receiver of the ground-based telemetry and control (TT&C) equipment. Through the same receiving channel of the equipment, it sequentially undergoes amplification, filtering, and down-conversion processing, ultimately converting into a digital baseband signal. This digital baseband signal includes downlink measurement baseband and downlink calibration baseband signals. Specifically, the ground-based TT&C equipment uses two independent and parallel baseband processing units, employing identical processing timing sequences, to separately acquire and track the downlink measurement baseband and downlink calibration baseband signals.

[0035] ; ; = + ; in, This is a downlink calibration signal. For link delay The uplink calibration signal data bits, For link delay The uplink calibration signal pseudocode, This is the downlink carrier frequency. To calibrate the total link delay, For downlink measurement signals, This represents the modulation amplitude of the downlink measurement signal, which is the amplitude parameter of the radio frequency signal of the downlink measurement signal. This is the pseudocode for the downlink measurement signal with the total zero value of the measurement and control system. This refers to the downlink measurement signal data bits with the total zero value of the measurement and control system. This is the total zero value of the measurement and control system.

[0036] This represents the closed-loop zero value of the calibration signal. The closed-loop zero value of the calibration signal is the total time delay of the calibration signal transmission and processing within the ground-based telemetry and control equipment. This refers to the delay of the transceiver channel for ground-based telemetry, control, and testing equipment. The transceiver channel delay is defined as zero. The ground-based telemetry, control, and testing equipment refers to ground-based inspection equipment or ground-based devices. Delay for closed-loop cables and high-stability mixers.

[0037] The amplitude of the downlink calibration signal is characterized by the modulation amplitude of the calibration signal. The calibration signal data bits and the calibration signal pseudocode carried by the signal are both superimposed with the time delay corresponding to the closed-loop zero value of the calibration signal. The signal carrier is the radio frequency carrier corresponding to the downlink carrier frequency point. The amplitude of the downlink measurement signal is characterized by the amplitude of the downlink measurement modulation signal. The downlink measurement signal data bits and the downlink measurement signal pseudocode carried by the signal are both superimposed with the time delay corresponding to the total zero value of the measurement and control system. The signal carrier is the radio frequency carrier corresponding to the downlink carrier frequency point.

[0038] This embodiment employs RF combining and shared-channel synchronous processing, which eliminates calibration errors introduced by hardware differences across multiple channels, significantly improving calibration accuracy. The synchronous processing ensures timing alignment of the two signals, simplifies the hardware architecture, and reduces system implementation costs. This embodiment requires no additional hardware modifications, does not interrupt measurement and control services, adapts to dynamic real-time calibration requirements, and ensures the stability and reliability of the calibration process.

[0039] S103: Determine the uplink measurement phase and downlink measurement phase based on the downlink measurement baseband signal, and obtain the total zero value of the measurement and control system based on the uplink measurement phase, downlink measurement phase and phase change rate reference data; determine the downlink calibration phase based on the downlink calibration baseband signal, and obtain the total delay of the calibration link based on the downlink calibration phase and phase change rate reference data.

[0040] In this embodiment, determining the uplink measurement phase and downlink measurement phase based on the downlink measurement baseband signal includes: performing pseudocode phase tracking on the downlink measurement baseband signal, extracting the downlink measurement phase based on the tracked downlink measurement baseband signal; and performing downlink frame data parsing on the downlink measurement baseband signal, determining the uplink measurement phase from the parsing results.

[0041] In this embodiment, the total zero value of the measurement and control system is obtained based on the uplink measurement phase, downlink measurement phase, and phase change rate reference data, including: calculating the phase difference between the uplink measurement phase and the downlink measurement phase to obtain the measurement phase difference; and using the ratio of the measurement phase difference to the phase change rate reference data as the total zero value of the measurement and control system.

[0042] In this embodiment, the total calibration link delay is obtained based on the downlink calibration phase and phase change rate reference data, including: calculating the phase difference between the downlink calibration phase and the preset reference phase to obtain the calibration phase difference; and using the ratio of the calibration phase difference to the phase change rate reference data as the total calibration link delay.

[0043] In this embodiment, the uplink measurement phase refers to the pseudocode phase data corresponding to the uplink measurement signal received by the telemetry and control transponder and collected based on the downlink measurement signal. It is the core phase reference for the overall zero-value calculation of the telemetry and control system. The downlink measurement phase refers to the pseudocode phase data of the uplink measurement signal collected based on the downlink measurement signal after tracking the downlink measurement baseband signal. The phase change rate reference data refers to the standard rate data of the pseudocode phase changing with time preset in the aerospace telemetry and control system. It is the core reference for converting phase difference into time delay data. The overall zero value of the telemetry and control system refers to the overall system time delay data including the zero value of the telemetry and control transponder, the zero value of the ground equipment, and the zero value of the cable. The downlink calibration phase refers to the processed pseudocode phase data of the uplink measurement signal collected based on the downlink calibration signal, used to calibrate the ground link time delay. The total delay of the calibration link refers to the overall time delay data of the transmission and processing link of the ground calibration signal (i.e., the uplink calibration signal). Tracking refers to the signal processing operation of carrier and pseudocode synchronization of the digital baseband signal through the tracking module. Downlink frame data parsing refers to the processing operation of parsing the frame data of the downlink measurement baseband signal to extract the target parameters. The measured phase difference refers to the phase difference calculated between the uplink and downlink measured phases. The calibration phase difference refers to the phase difference calculated between the downlink calibration phase and the preset reference phase. The preset reference phase refers to the reference phase value set in advance during the calibration link phase calculation, used to unify the calculation benchmark for the calibration phase.

[0044] This embodiment focuses on delay calculation using pseudocode phase resolution. It accurately acquires two phase data streams through tracking and frame data parsing, ensuring the accuracy of phase parameters. This embodiment uses unified phase change rate reference data to ensure consistency between the system's total zero value and the calculation benchmark for the total delay of the calibration link, eliminating calibration errors caused by inconsistent benchmarks. This embodiment achieves a linear conversion from phase to delay through phase difference calculation and division operations, resulting in a simple calculation logic with controllable accuracy. A preset reference phase provides a fixed starting point for the calibration link, ensuring the stability of the calibration delay. This embodiment can accurately extract phase, unify the calculation benchmark, and simplify the calculation logic, ensuring the real-time performance and accuracy of zero value calculation, and adapting to dynamic calibration requirements.

[0045] For example, this embodiment obtains the uplink measurement phase separately. Phase with downlink measurement Calculate the phase difference between the two paths. This refers to the phase change of the signal transmitted from the ground-based telemetry and control equipment to the telemetry and control transponder, and then relayed back to the ground-based telemetry and control equipment. This embodiment uses the aforementioned phase difference value... Divide by the preset phase change rate reference data This will give you the total zero value of the measurement and control system.

[0046] During the zero-value calibration of the telemetry and control transponder, the ground telemetry and control equipment does not perform dynamic trajectory simulation operation. At this time, the total propagation delay of the uplink and downlink signals consists of only three parts: the transmission and reception channel delay of the ground telemetry and control equipment, the transmission and reception channel delay of the telemetry and control transponder, and the external transmission cable delay. This total propagation delay is the total zero value of the telemetry and control system. = ;in, This is the total zero value of the measurement and control system.

[0047] After receiving the downlink calibration signal, the ground-based telemetry and control equipment completes the downlink phase calibration. The data acquisition process is then used to calculate the total transmission delay of the closed-loop calibration link. The calculation method for the total transmission delay of the closed-loop calibration link is as follows: the difference between the downlink calibration signal phase and a preset reference phase is calculated, and then the calculated phase difference is divided by the phase change rate reference data. The preset reference phase is the uplink reference phase of the closed-loop calibration link, and this value is preset to zero. The calculation formula is: ;in, This indicates the uplink measurement phase of the calibration link, and is set to 0.

[0048] Meanwhile, the ground-based telemetry and control (TT&C) equipment receives downlink measurement signals from the TT&C transponder, completes the acquisition of downlink measurement phases, and then calculates the total transmission delay of the link under normal operating conditions of the TT&C transponder. This delay is the total zero value of the TT&C system. The total zero value of the TT&C system is calculated by taking the difference between the downlink measurement phase and the uplink measurement phase, and then dividing the calculated phase difference by the phase change rate reference data. The uplink measurement phase is acquired in real time by the TT&C transponder when receiving uplink measurement signals and transmitted to the ground-based TT&C equipment through downlink measurement signal frames.

[0049] The final zero-value calibration result of the telemetry and control transponder is calculated by subtracting the zero value of the ground telemetry and control testing equipment and the pre-calibrated cable zero value from the total zero value of the telemetry and control system. The zero value of the ground telemetry and control testing equipment is obtained by subtracting the fixed delay of the calibration link from the total delay of the calibration link. The fixed delay of the calibration link is the combined delay of the closed-loop cable and the high-stability mixer. The pre-calibrated cable zero value is the inherent delay of the external transmission cable. Both of these delay parameters are known values ​​pre-calibrated before calibration. The calculation formula is: ; - Among them, the delay of closed-loop cables and high-stability mixers and cable zero value All of these are known quantities. For the transponder zero value, For ground-based measurement and control testing equipment, zero value, For cable zero value, This indicates the closed-loop zero value of the calibration signal. Cable zero value. It can be calibrated in advance and is minimally affected by the environment during testing.

[0050] For example, this embodiment can perform tracking processing on the downlink measurement baseband signal. Specifically, the tracking processing uses a code tracking loop and a carrier tracking loop, which are commonly used in the aerospace telemetry and control field, to synchronize the downlink measurement signal, and then acquire the downlink measurement phase based on the downlink measurement signal. The downlink measurement phase reflects the pseudo-code phase state of the downlink measurement signal in real time. This embodiment can perform downlink frame data parsing processing on the downlink measurement baseband signal. After frame synchronization confirmation, the downlink frame data content is parsed field by field, and the uplink measurement phase uploaded by the telemetry and control transponder is extracted from the parsed data fields. The uplink measurement phase is acquired in real time by the telemetry and control transponder when receiving the uplink measurement signal and filled into the downlink measurement signal frame data.

[0051] After extracting the phase data, this embodiment first calculates the phase difference between the determined uplink and downlink measurement phases. The calculation process uses direct subtraction to obtain the measured phase difference, which represents the total phase change between the uplink and downlink signals. This embodiment can retrieve the system's preset phase change rate reference data, perform a division operation between the measured phase difference and the phase change rate reference data, and use the resulting ratio as the total zero value of the telemetry and control system. This value includes the overall time delay information of the telemetry and control transponder, ground equipment, and transmission cables. The calculation process is performed in real time with no data delay, meeting the real-time requirements of dynamic calibration.

[0052] In this embodiment, the downlink calibration baseband signal can be tracked and processed in the same way as the downlink measurement phase extraction to extract the downlink calibration phase.

[0053] This embodiment can first retrieve a preset reference phase, which is a fixed reference for calculating the calibration link phase, specifically set as the standard initial phase value of the 0-code phase. This embodiment can perform phase difference calculation processing on the downlink calibration phase and the preset reference phase, obtaining the calibration phase difference by direct subtraction. This data represents the total phase change of the calibration signal from generation to reception. This embodiment can perform a division operation on the calibration phase difference and the phase change rate reference data 10.23 MHz, and the resulting ratio is directly used as the total calibration link delay. The total calibration link delay only includes the transmission and processing delay of the ground calibration link, without a transponder delay component, providing a pure ground link delay reference for the subsequent accurate calculation of the transponder zero value.

[0054] This embodiment improves the accuracy of zero-value calculation by precise phase extraction and unified calculation benchmark, and ensures the real-time performance of calibration by real-time phase processing and linear operation.

[0055] S104: Based on the total zero value of the measurement and control system, the total delay of the calibration link, the fixed delay of the calibration link, and the pre-calibrated zero value of the cable, the zero value calibration result of the transponder is obtained.

[0056] In this embodiment, the zero value calibration result of the transponder is obtained based on the total zero value of the telemetry and control system, the total delay of the calibration link, the fixed delay of the calibration link, and the pre-calibrated zero value of the cable. This includes: calculating the difference between the total delay of the calibration link and the fixed delay of the calibration link to obtain the zero value of the ground testing equipment of the ground telemetry and control equipment; and determining the difference between the total zero value of the telemetry and control system and the zero value of the ground testing equipment as the first difference. The difference between the first difference and the pre-calibrated zero value of the cable is determined as the second difference, and the second difference is determined as the zero value calibration result of the transponder.

[0057] In this embodiment, the calibration link fixed delay refers to the preset fixed delay data of standard components such as the high-stability mixer and closed-loop cable in the calibration link. This data is obtained through the factory calibration of the components. For example, the fixed delay value of the combination of closed-loop cable and high-stability mixer is 50 nanoseconds. The ground test equipment zero value refers to the transmission delay data of the ground control and testing equipment's own transceiver channel, which is the difference between the total delay of the calibration link and the calibration link fixed delay. The transponder zero value calibration result refers to the inherent delay data of the control and testing transponder itself after removing the ground equipment delay, the link fixed delay, and the cable delay. The transponder zero value calibration result is the final target data of zero value calibration, used to characterize the true delay characteristics of the transponder.

[0058] This embodiment employs a delay-layering and stripping calculation logic. First, by subtracting the total delay of the calibration link from its fixed delay, the inherent delay of the ground-based telemetry and control equipment is separated, eliminating the interference of fixed component delays on the ground equipment's zero value. Using the total zero value of the telemetry and control system as a benchmark, this embodiment sequentially subtracts the zero value of the ground testing equipment and the pre-calibrated cable zero value, completely stripping the delay components of the ground link and transmission cables, ultimately obtaining zero value data that reflects only the telemetry and control transponder itself.

[0059] This embodiment uses layered delay stripping calculations to accurately remove delay components from ground equipment, link fixing devices, and cables, obtaining the true zero-value data of the transponder. The calculation logic of this embodiment is simple, highly real-time, and the calibration results are accurate and reliable. It requires no additional hardware or complex operations, effectively improving the accuracy and efficiency of zero-value calibration and adapting to dynamic real-time calibration requirements.

[0060] For example, such as Figure 2 As shown, the method in this embodiment mainly operates between the ground detection equipment (GDS) and the telemetry and control transponder (DUT). The core logic of this embodiment is: generating two co-source signals, one uplink measurement signal (service signal) and the other uplink calibration signal (calibration reference). These two co-source signals are combined and simultaneously sent to the receiving channels of both the telemetry and control transponder and the GDS. Since the pseudo-code sequence of the uplink calibration signal is not within the acquisition channel of the telemetry and control transponder, it only adds an extra off-address signal to the transponder and does not affect its operation. The telemetry and control transponder actually only captures the uplink measurement signal and generates the downlink measurement signal based on the received uplink measurement signal. Similarly, the pseudo-code sequence of the uplink measurement signal is not within the acquisition range of the GDS and does not affect the GDS's reception of the downlink measurement signal. The uplink calibration signal is frequency-converted to a downlink calibration signal by a high-stability mixer and combined with the downlink measurement signal for shared channel reception. Through dual-channel phase difference calculation, the ground link delay is removed, and the transponder's own zero value (inherent delay of the transmit / receive channel) is accurately extracted.

[0061] Specifically, the human interaction and control unit is responsible for sending frequency configuration commands to the frequency control module, sending signal simulation start / stop commands and calibration enable control commands to the signal simulation control module, and receiving the transponder zero value output by the ground detection zero value calculation module. Complete the display and storage of results.

[0062] The ground inspection unit is the core execution unit of the calibration system, functionally divided into three parts: the transmitter, the receiver, and the computing unit. Specifically, the transmitter is responsible for generating dual signals from the same source and outputting radio frequency signals, including: (1) The frequency control module receives the frequency configuration instructions from the manual interaction and control unit, and provides a carrier frequency reference for the direct digital synthesizer (DDS) in the measurement signal analog module.

[0063] (2) The signal simulation control module receives the signal simulation start / stop and calibration enable control commands from the human interaction and control unit, and controls the signal generation status of the measurement signal simulation module.

[0064] (3) The clock unit provides a unified global clock for the measurement signal analog module, the RF up-conversion module, the RF down-conversion module, and the downlink measurement baseband signal synchronization module, ensuring the timing synchronization of the two signals.

[0065] (4) Measurement signal simulation module (core dual signal generation unit): Uplink calibration signal link: Calibration measurement data board outputs calibration measurement data frames. Calibration pseudocode sequence output calibration pseudocode After XOR spreading, the two are multiplied and modulated with the carrier generated by DDS; Uplink measurement signal link: Measurement data board outputs measurement data frames Measure pseudocode sequence output Measure pseudocode After XOR spreading, the two are multiplied and modulated with the same DDS carrier. (5) The two modulated signals are combined and then output to the RF upconversion module.

[0066] (6) RF upconversion module: The combined signal is sequentially processed by a digital-to-analog converter (DAC), upconversion, low noise amplifier, and RF power amplifier. The processed combined signal is sent to the measurement and control transponder and the high stability mixer. The processed combined signal includes uplink measurement signal and uplink calibration signal.

[0067] (7) The high-stability mixer receives the combined signal containing the uplink calibration signal, downconverts the frequency of the uplink calibration signal from the uplink frequency point to the downlink frequency point, generates the combined signal containing the downlink calibration signal, and outputs it to the ground detection combiner.

[0068] The receiver is responsible for common channel signal processing and baseband synchronization, including: (1) The combiner receives the downlink measurement signal output by the telemetry and control transponder and the downlink calibration signal output by the high-stability mixer, combines the two signals into one, and outputs it to the radio frequency downconversion module.

[0069] (2) RF downconversion module: The downlink calibration signal and the downlink measurement signal are combined by RF. The combined signal is then passed through a filter, low noise amplifier, downconversion, and analog-to-digital converter (ADC) to convert it into a digital baseband signal. The digital baseband signal includes the downlink measurement baseband signal and the downlink calibration baseband signal. The digital baseband signal is then output to the downlink measurement baseband signal synchronization module.

[0070] (3) Downlink measurement baseband signal synchronization module (dual-link parallel processing): Downlink measurement signal link: The digital baseband signal is sequentially acquired and tracked to obtain downlink measurement data. And by calibrating the pseudocode sequence and downlink measurement data Extracting downlink measurement phase Simultaneously, the uplink measurement phase transmitted by the transponder is parsed from the downlink data frame. ,Will and Output to the distance measurement calculation module.

[0071] Downlink calibration signal link: The digital baseband signal is sequentially acquired and tracked to obtain calibration measurement data. And by calibrating the pseudocode sequence and calibrating the measurement data. The downlink calibration phase was extracted by analysis. Simultaneously, a preset reference phase is introduced. ,Will and Output to the calibration measurement distance calculation module.

[0072] The computing end is responsible for layered delay calculation, including: (1) The distance calculation module is based on the downlink measurement phase. Phase with uplink measurement The total zero value of the measurement and control system was calculated. The output is sent to the zero-value calculation module.

[0073] (2) The calibration measurement distance calculation module is based on the downlink calibration phase. Phase with preset reference The total delay of the calibration link is calculated. The output is sent to the zero-value calculation module.

[0074] (3) The zero-value calculation module is used to peel off the ground link delay in layers and extract the zero value of the transponder. The results are then output to the human interaction and control unit.

[0075] The telemetry and control transponder module maintains normal operational status, including: (1) Uplink measurement signal receiving module: Receives the combined signal containing the uplink measurement signal sent by the ground detection, completes signal acquisition and pseudocode tracking, and extracts the uplink measurement phase. The signal is output to the downlink measurement signal simulation module.

[0076] (2) Downlink measurement signal simulation module: based on uplink measurement phase Generate downlink measurement signals, Encapsulated into a downlink data frame, the downlink measurement signal is output to the ground detection combiner.

[0077] This embodiment enables calibration signals to bypass the transponder without affecting normal telemetry and control services, achieving dynamic real-time calibration; dual-channel signals are received from the same source and through the same channel, eliminating hardware differences and timing errors between multiple channels; downlink signals are generated based on the transponder's native coherent forwarding capability, without requiring modification of the device under test hardware; ground link delay is layered and stripped to accurately extract the transponder's zero value, and the results are unaffected by environmental interference.

[0078] Corresponding to the dynamic real-time calibration method for zero value of the telemetry and control transponder in the above embodiment, Figure 3 This is a structural block diagram of a real-time dynamic calibration device for zero-value telemetry and control transponders provided in one embodiment of this application. For ease of explanation, only the parts relevant to the embodiment of this application are shown. References Figure 3 The zero-value dynamic real-time calibration device 20 for the telemetry and control transponder includes: a dual-channel signal acquisition module 21, a baseband conversion module 22, a dual-channel delay calculation module 23, and a calibration result generation module 24.

[0079] The dual-channel signal acquisition module 21 is used to generate uplink measurement signals and uplink calibration signals; send the uplink measurement signals to the telemetry and control transponder and acquire the downlink measurement signals output by the telemetry and control transponder; perform down-conversion processing on the uplink calibration signals to obtain the downlink calibration signals; the uplink measurement signals are uplink telemetry and control service signals carrying uplink telemetry and control data and uplink ranging pseudocode, and the uplink calibration signals are reference signals that are time-synchronized with the uplink measurement signals and obtained through frame reconstruction and pseudocode reconstruction; Baseband conversion module 22 is used to perform radio frequency combining of downlink measurement signal and downlink calibration signal and convert them into downlink measurement baseband signal and downlink calibration baseband signal; The dual-path delay calculation module 23 is used to determine the uplink measurement phase and downlink measurement phase based on the downlink measurement baseband signal, and to obtain the total zero value of the measurement and control system based on the uplink measurement phase, downlink measurement phase and phase change rate reference data; it also determines the downlink calibration phase based on the downlink calibration baseband signal, and to obtain the total delay of the calibration link based on the downlink calibration phase and phase change rate reference data. The calibration result generation module 24 is used to obtain the zero value calibration result of the transponder based on the total zero value of the measurement and control system, the total delay of the calibration link, the fixed delay of the calibration link, and the pre-calibrated zero value of the cable.

[0080] In one embodiment of this application, the downlink measurement signal is generated by a telemetry and control transponder in the following manner: Extract the uplink measurement phase from the uplink measurement signal; The downlink carrier signal is determined based on preset downlink signal parameters, the downlink carrier signal is modulated, and the uplink measurement phase is loaded into the downlink carrier signal to obtain the downlink measurement signal.

[0081] In one embodiment of this application, the baseband conversion module 22 is specifically used to: after radio frequency combining the downlink measurement signal and the downlink calibration signal, perform amplification, filtering, downconversion and analog-to-digital conversion processing through the same channel to obtain the downlink measurement baseband signal corresponding to the downlink measurement signal and the downlink calibration baseband signal corresponding to the downlink calibration signal, respectively.

[0082] In one embodiment of this application, the dual-path delay calculation module 23 is specifically used for: performing pseudocode phase tracking on the downlink measurement baseband signal, extracting the downlink measurement phase based on the tracked downlink measurement baseband signal; and performing downlink frame data parsing on the downlink measurement baseband signal to determine the uplink measurement phase from the parsing results.

[0083] In one embodiment of this application, the dual-path delay calculation module 23 is further configured to: calculate the phase difference between the uplink measurement phase and the downlink measurement phase to obtain the measurement phase difference; and use the ratio of the measurement phase difference to the phase change rate reference data as the total zero value of the measurement and control system.

[0084] In one embodiment of this application, the dual-path delay calculation module 23 is further configured to: calculate the phase difference between the downlink calibration phase and the preset reference phase to obtain the calibration phase difference; and use the ratio of the calibration phase difference to the phase change rate reference data as the total delay of the calibration link.

[0085] In one embodiment of this application, the calibration result generation module 24 is specifically used to: calculate the difference between the total delay of the calibration link and the fixed delay of the calibration link to obtain the ground inspection equipment zero value of the ground telemetry and control equipment; and determine the difference between the total zero value of the telemetry and control system and the zero value of the ground inspection equipment as the first difference. The difference between the first difference and the pre-calibrated zero value of the cable is determined as the second difference, and the second difference is determined as the zero value calibration result of the transponder.

[0086] See Figure 4 , Figure 4 This is a schematic block diagram of an electronic device provided according to an embodiment of this application. Figure 4 The electronic device 300 in this embodiment may include one or more processors 301, one or more input devices 302, one or more output devices 303, and one or more memories 304. The processors 301, input devices 302, output devices 303, and memories 304 communicate with each other via a communication bus 305. The memories 304 store computer programs, including program instructions. The processors 301 execute the program instructions stored in the memories 304. Specifically, the processors 301 are configured to invoke the program instructions to perform the functions of each module / unit in the above-described device embodiments, for example... Figure 3 The functions of the dual-channel signal acquisition module 21, baseband conversion module 22, dual-channel delay calculation module 23, and calibration result generation module 24 are shown.

[0087] It should be understood that, in the embodiments of this application, the processor 301 may be a central processing unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0088] Input device 302 may include a touchpad, a fingerprint sensor (for collecting the user's fingerprint information and fingerprint orientation information), a microphone, etc., and output device 303 may include a display (LCD, etc.), a speaker, etc.

[0089] The memory 304 may include read-only memory and random access memory, and provides instructions and data to the processor 301. A portion of the memory 304 may also include non-volatile random access memory. For example, the memory 304 may also store information from a telemetry and control transponder.

[0090] In specific implementations, the processor 301, input device 302, and output device 303 described in the embodiments of this application can execute the implementation method described in the measurement and control transponder zero value dynamic real-time calibration method provided in the embodiments of this application, or they can execute the implementation method of the electronic device described in the embodiments of this application, which will not be repeated here.

[0091] In another embodiment of this application, a computer-readable storage medium is provided. This computer-readable storage medium stores a computer program, which includes program instructions. When executed by a processor, the program instructions implement all or part of the processes in the methods described above. Alternatively, the computer program can instruct related hardware to complete the process. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include any entity or device capable of carrying computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0092] The computer-readable storage medium can be an internal storage unit of the electronic device in any of the foregoing embodiments, such as a hard disk or memory of the electronic device. The computer-readable storage medium can also be an external storage device of the electronic device, such as a plug-in hard disk, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the electronic device. Furthermore, the computer-readable storage medium can include both internal and external storage units of the electronic device. The computer-readable storage medium is used to store computer programs and other programs and data required by the electronic device. The computer-readable storage medium can also be used to temporarily store data that has been output or will be output.

[0093] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0094] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the electronic devices and units described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0095] In the several embodiments provided in this application, it should be understood that the disclosed electronic devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through some interfaces or units, or they may be electrical, mechanical, or other forms of connection.

[0096] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of this application, depending on actual needs.

[0097] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0098] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for dynamic real-time calibration of zero value in a telemetry and control transponder, characterized in that, include: Generate an uplink measurement signal and an uplink calibration signal; send the uplink measurement signal to the telemetry and control transponder, and obtain the downlink measurement signal output by the telemetry and control transponder; The uplink calibration signal is downconverted to obtain the downlink calibration signal. The uplink measurement signal is an uplink measurement and control service signal carrying uplink measurement and control data and uplink ranging pseudocode. The uplink calibration signal is a reference signal that is time-synchronized with the uplink measurement signal and obtained through frame reconstruction and pseudocode reconstruction. The uplink calibration signal and the uplink measurement signal differ only in the pseudocode pattern. Pseudocode reconstruction refers to keeping the pseudocode rate and pseudocode period consistent with the ranging pseudocode of the uplink measurement signal, and only replacing the uplink service with orthogonal pseudocode. After the downlink measurement signal and the downlink calibration signal are radio frequency combined, they are synchronously amplified, filtered, downconverted and analog-to-digital converted through the same channel to obtain a digital baseband signal, which includes the downlink measurement baseband signal and the downlink calibration baseband signal. The uplink and downlink measurement phases are determined based on the downlink measurement baseband signal, and the total zero value of the measurement and control system is obtained based on the uplink measurement phase, the downlink measurement phase, and the phase change rate reference data. The downlink calibration phase is determined based on the downlink calibration baseband signal, and the total calibration link delay is obtained based on the downlink calibration phase and phase change rate reference data. Based on the total zero value of the measurement and control system, the total delay of the calibration link, the fixed delay of the calibration link, and the pre-calibrated zero value of the cable, the zero value calibration result of the transponder is obtained; The downlink measurement signal is generated by the telemetry and control transponder in the following manner: extracting the uplink measurement phase from the uplink measurement signal; determining the downlink carrier signal based on preset downlink signal parameters; modulating the downlink carrier signal; and incorporating the uplink measurement phase into the downlink carrier signal to obtain the downlink measurement signal. The step of determining the uplink measurement phase and downlink measurement phase based on the downlink measurement baseband signal includes: performing pseudocode phase tracking on the downlink measurement baseband signal, and extracting the downlink measurement phase based on the tracked downlink measurement baseband signal; The downlink measurement baseband signal is parsed to determine the uplink measurement phase from the parsing results.

2. The method for dynamic real-time calibration of zero value of a telemetry and control transponder as described in claim 1, characterized in that, The process of obtaining the total zero value of the measurement and control system based on the uplink measurement phase, the downlink measurement phase, and the phase change rate reference data includes: The phase difference between the uplink measurement phase and the downlink measurement phase is calculated to obtain the measurement phase difference. The ratio of the measured phase difference to the phase change rate reference data is taken as the total zero value of the measurement and control system.

3. The method for dynamic real-time calibration of zero value of a telemetry and control transponder as described in claim 1, characterized in that, The process of obtaining the total calibration link delay based on the downlink calibration phase and phase change rate reference data includes: The phase difference between the downlink calibration phase and the preset reference phase is calculated to obtain the calibration phase difference; The ratio of the calibration phase difference to the phase change rate reference data is used as the total delay of the calibration link.

4. The method for dynamic real-time calibration of zero value of a telemetry and control transponder as described in claim 1, characterized in that, The process of obtaining the transponder zero-value calibration result based on the total zero value of the measurement and control system, the total delay of the calibration link, the fixed delay of the calibration link, and the pre-calibrated zero value of the cable includes: The difference between the total delay of the calibration link and the fixed delay of the calibration link is calculated to obtain the zero value of the ground inspection equipment of the ground telemetry and control testing equipment. The difference between the total zero value of the measurement and control system and the zero value of the ground inspection equipment is determined as the first difference; The difference between the first difference and the pre-calibrated zero value of the cable is determined as the second difference, and the second difference is determined as the zero value calibration result of the transponder.

5. A dynamic real-time calibration device for a telemetry and control transponder using the dynamic real-time calibration method for zero value of a telemetry and control transponder according to any one of claims 1-4, characterized in that, include: A dual-channel signal acquisition module is used to generate uplink measurement signals and uplink calibration signals; The uplink measurement signal is sent to the telemetry and control transponder to obtain the downlink measurement signal output by the telemetry and control transponder; the uplink calibration signal is downconverted to obtain the downlink calibration signal; the uplink measurement signal is an uplink telemetry and control service signal carrying uplink telemetry and control data and uplink ranging pseudocode, and the uplink calibration signal is a reference signal that is time-synchronized with the uplink measurement signal and obtained by frame reconstruction and pseudocode reconstruction; The baseband conversion module is used to perform radio frequency combining on the downlink measurement signal and the downlink calibration signal and convert them into downlink measurement baseband signal and downlink calibration baseband signal; The dual-path delay calculation module is used to determine the uplink measurement phase and the downlink measurement phase based on the downlink measurement baseband signal, and to obtain the total zero value of the measurement and control system based on the uplink measurement phase, the downlink measurement phase and the phase change rate reference data. The downlink calibration phase is determined based on the downlink calibration baseband signal, and the total calibration link delay is obtained based on the downlink calibration phase and phase change rate reference data. The calibration result generation module is used to obtain the zero value calibration result of the transponder based on the total zero value of the measurement and control system, the total delay of the calibration link, the fixed delay of the calibration link, and the pre-calibrated zero value of the cable.

6. The zero-value dynamic real-time calibration device for a telemetry and control transponder as described in claim 5, characterized in that, When the dual-path delay calculation module obtains the total zero value of the measurement and control system based on the uplink measurement phase, the downlink measurement phase, and the phase change rate reference data, it is specifically used for: The phase difference between the uplink measurement phase and the downlink measurement phase is calculated to obtain the measurement phase difference. The ratio of the measured phase difference to the phase change rate reference data is taken as the total zero value of the measurement and control system.

Images