Broadband acquisition and distribution platform suitable for satellite signal monitoring
By designing broadband collection and distribution platforms, including inverter modules, signal acquisition modules, and main control modules, the traditional L -band signal collection and pre -processing methods are complicated and difficult to achieve real -time collection. Collection and pre -processing effects.
Patent Information
- Application Number
- CN202323545026.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-12-25
AI Technical Summary
The traditional L-band signal acquisition and preprocessing methods have complex structures, making it difficult to realize real-time acquisition and preprocessing of broadband signals.
Design a broadband collection and distribution platform suitable for satellite signal monitoring, including frequency conversion modules, signal acquisition modules and main control modules. The frequency conversion module processes the receiving satellite signal, transforms the signal to the mid -frequency signal and sends it to the signal acquisition module; the signal collection module is collected by the high -speed modulus converter and the FPGA to achieve digital processing of analog signals, and and of. Send the DDC and FFT data generated after processing to the main control module; the main control module monitor and store broadband spectrum on DDC and FFT data in real time, and output multi -way DDC data and spectrum data through the fiber interface to complete the collection and storage of data , Distribution function.
The collection and pre -processing of high -speed and large bandwidth satellite signals can be used in the problem of complex and difficult to achieve real -time collection in conventional satellite, ultra -short wave spectrum monitoring and analysis, and group -carriers.
Smart Images
Figure CN222423687U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of satellite signal monitoring, and in particular to a broadband acquisition and distribution platform suitable for satellite signal monitoring. Background Art
[0002] The L-band signal in the satellite communication system has the characteristics of high frequency and large bandwidth, so the acquisition and preprocessing of L-band signals is particularly important.
[0003] Traditional L-band signal acquisition and preprocessing methods usually use separate hardware devices, which is not only complex in structure but also difficult to achieve real-time acquisition and preprocessing of broadband signals. Utility Model Content
[0004] In response to the deficiencies in the prior art, this application provides a broadband acquisition and distribution platform suitable for satellite signal monitoring. It uses an independent high-speed and high-precision analog-to-digital converter design to achieve high-speed, large-bandwidth acquisition characteristics and can be used in conventional satellites, ultra-short wave spectrum monitoring and analysis, and group carrier measurement and control systems.
[0005] The technical solution of this application to solve the above technical problems is as follows:
[0006] A broadband acquisition and distribution platform suitable for satellite signal monitoring includes a frequency conversion module, a signal acquisition module, and a main control module, wherein:
[0007] The frequency conversion module is in communication connection with the signal acquisition module, and the frequency conversion module includes an analog channel for performing processing operations such as filtering, amplification, down-conversion, and adjustable attenuation on the signal, and sending the processed intermediate frequency signal to the signal acquisition module;
[0008] The signal acquisition module is connected to the main control module for acquisition and processing of the intermediate frequency signal, realizing digital processing of the analog signal, and sending the DDC and FFT data generated after processing to the main control module. The signal acquisition module includes a high-speed analog-to-digital converter and an FPGA, and the FPGA is connected to multiple optical fiber interfaces;
[0009] The main control module is used to perform broadband spectrum real-time monitoring and storage of DDC and FFT data, and to directly output multiple channels of DDC data and spectrum data through FPGA by controlling the optical fiber interface, thereby completing the data distribution function.
[0010] By adopting the above technical solution, the frequency conversion module processes the received satellite signal, converts the satellite signal into an intermediate frequency signal and sends it to the signal acquisition module; then, the signal acquisition module performs acquisition and processing operations on the intermediate frequency signal to realize digital processing of the analog signal, and sends the DDC and FFT data generated after processing to the main control module; finally, the main control module performs broadband spectrum real-time monitoring and storage of the DDC and FFT data, and by controlling the optical fiber interface, the FPGA directly outputs multiple channels of DDC data and spectrum data, completing the data acquisition, storage, and distribution functions, so as to achieve the effect of high-speed and large-bandwidth data acquisition.
[0011] Furthermore, the signal acquisition module and the main control module are both connected to the data storage module, and the data storage module receives the DDC and FFT data sent by the signal acquisition module for data backup and recovery.
[0012] Furthermore, the signal acquisition module and the main control module are both connected to a preprocessing module, which is used to perform further frequency conversion, signal demodulation, and noise suppression processing on the collected data, and store the preprocessed data on a local hard disk or output it through a network.
[0013] Furthermore, the main control module includes a data distribution submodule, and the data distribution submodule sends the processed data or the original data to a local display or transmits it to a remote user terminal through a network according to user requirements.
[0014] Furthermore, the data storage module includes an NVME hard disk.
[0015] In summary, compared with the prior art, the above technical solution has the following beneficial effects:
[0016] The present application describes a broadband acquisition and distribution platform suitable for satellite signal monitoring. The frequency conversion module processes the received satellite signal, converts the satellite signal into an intermediate frequency signal and sends it to the signal acquisition module; then, the signal acquisition module performs acquisition and processing operations on the intermediate frequency signal to realize digital processing of the analog signal, and sends the DDC and FFT data generated after processing to the main control module; finally, the main control module performs broadband spectrum real-time monitoring and storage of the DDC and FFT data, and by controlling the optical fiber interface, the FPGA directly outputs multiple DDC data and spectrum data, completing the data acquisition, storage, and distribution functions to achieve the effect of high-speed and large-bandwidth data acquisition. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;
[0018] Figure 2It is a module block diagram of each module in the embodiment of this application.
[0019] Explanation of the accompanying drawings: 1. Frequency conversion module; 2. Signal acquisition module; 3. Main control module; 31. Distribution submodule; 4. Data storage module; 41. NVME hard disk; 5. Preprocessing module. DETAILED DESCRIPTION
[0020] The principles and features of the present application are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present application and are not used to limit the scope of the present application.
[0021] The embodiment of the present application discloses a broadband acquisition and distribution platform suitable for satellite signal monitoring.
[0022] Reference Figure 1-Figure 2 A broadband acquisition and distribution platform suitable for satellite signal monitoring includes a frequency conversion module 1, a signal acquisition module 2, and a main control module 3. The frequency conversion module 1 processes the received satellite signal, converts the satellite signal into an intermediate frequency signal and sends it to the signal acquisition module 2; then, the signal acquisition module 2 performs acquisition and processing operations on the intermediate frequency signal to realize the digital processing of the analog signal, and sends the DDC and FFT data generated after the processing to the main control module 3; finally, the main control module 3 performs broadband spectrum real-time monitoring and storage of the DDC and FFT data, and by controlling the optical fiber interface, the FPGA directly outputs multiple DDC data and spectrum data, completing the data acquisition, storage, and distribution functions, so as to achieve the effect of high-speed and large-bandwidth data acquisition.
[0023] Specifically, the frequency conversion module 1 is communicatively connected with the signal acquisition module 2. The frequency conversion module 1 includes an analog channel for filtering, amplifying, down-converting, and adjustable attenuation processing operations on the signal, and sending the processed intermediate frequency signal to the signal acquisition module 2; the frequency conversion module 1 performs signal conditioning functions such as filtering, amplifying, down-converting, and adjustable attenuation (gain adjustment range: ≥50dB, step 1dB) on the input analog signal in the range of 950MHz to 2150MHz, -60dbm to -20dBm, and converts the RF signal to a standard 1200MHz intermediate frequency with a bandwidth of 500MHz.
[0024] It should be noted that: DDC (Diaital Down-Converter), that is, digital down-conversion, down-converts the signal in the digital system to achieve the transformation from the radio frequency (intermediate frequency) signal to the baseband signal. DDC is mainly used for filtering and reducing the output data rate. The digital processing part includes a digitally controlled oscillator: NCO (Nu-merical Control Oscillator), a half-band extraction filter, a FIR filter, a gain stage, and a complex-real conversion stage. Each processing module has a control circuit that can be used alone or disabled to provide the required processing function. By configuring digital down-conversion, baseband real data or complex data can be output. The DDC data disclosed in the embodiment of the present application is the data after the above processing.
[0025] FFT, or Fast Fourier Transform, is an efficient algorithm for discrete Fourier transform (DFT). In audio processing, FFT is often used to transform waveforms (time domain signals) into frequency domain, so that users can better analyze signals. The FFT algorithm decomposes the original N-point sequence into a series of short sequences in turn, and makes full use of the symmetric and periodic properties of the exponential factors in the DFT calculation formula to obtain the corresponding DFTs of these short sequences and make appropriate combinations, thereby achieving the purpose of deleting repeated calculations, reducing multiplication operations and simplifying the structure. The FFT data disclosed in the embodiments of the present application is the data after the above processing.
[0026] FPGA (Field Programmable Gate Array) is a field programmable gate array, which is a further development of programmable devices such as PAL (Programmable Array Logic) and GAL (General Array Logic). It appears as a semi-custom circuit in the field of application-specific integrated circuits (ASICs), which not only solves the shortcomings of custom circuits, but also overcomes the shortcomings of the limited number of gate circuits of the original programmable devices.
[0027] FPGA can change its internal structure through programming to achieve different functions. The specific implementation process is as follows: design hardware description language, compile, synthesize, layout and route through EDA (electronic design automation) tools, convert it into a burnable file, and finally load it into the FPGA device to change the internal connection of the FPGA to complete the function.
[0028] The signal acquisition module 2 is communicatively connected with the main control module 3, and is used for collecting and processing the intermediate frequency signal, realizing the digital processing of the analog signal, and sending the DDC and FFT data generated after the processing to the main control module 3. The signal acquisition module 2 includes a high-speed analog-to-digital converter and an FPGA, and the FPGA is connected to multiple optical fiber interfaces; the signal acquisition module 2 uses the high-speed analog-to-digital converter and the FPGA as the processing core to complete the collection and processing of the intermediate frequency signal, and realize the digitization of the analog signal and the processing functions such as DDC and FFT.
[0029] In the embodiment of the present application, the analog-to-digital converter specifically adopts AD9689-2000, which has a 14-bit resolution, a spurious-free dynamic range of ≥60dB, and supports a maximum of 2GSPS, which can meet the signal acquisition capability of 500MHz bandwidth. FPGA performs DDC processing of signals of specified frequency and bandwidth, and the total number of DDC processing channels supports 16 channels, and the broadband DDC bandwidth meets 40MHz / 20MHz. FPGA performs broadband FFT processing, adopts a two-dimensional FFT processing architecture, supports a maximum of 512K point computing capability, a frequency resolution of up to 1.5KHz, and real-time FFT supports upload modes of different rates, with a minimum time resolution of ≤50ms. The acquisition module has time system access capability and supports information marking such as DDC data time stamp and channel number.
[0030] The main control module 3 is used to monitor and store the DDC and FFT data in broadband spectrum in real time, and by controlling the optical fiber interface, the FPGA directly outputs multiple channels of DDC data and spectrum data to complete the data distribution function. On the one hand, the processed DDC and FFT data are uploaded to the main control module 3 for real-time monitoring and storage of broadband spectrum; on the other hand, the 4*10G optical port interface connected to the FPGA directly outputs multiple channels of DDC data and spectrum data to complete the data distribution function.
[0031] In the embodiment of the present application, the main control module 3 is a signal processing and control module with Intel CPU as the core, which mainly completes the signal processing and control functions such as system self-check and abnormal alarm, status monitoring, time-frequency diagram display, file management, data release configuration, etc. The main control module 3 includes a data distribution submodule 31, which sends the processed data or raw data to the local display or transmits it to the remote user terminal through the network according to user needs.
[0032] The signal acquisition module 2 and the main control module 3 are both connected to the data storage module 4, and the data storage module 4 receives the DDC and FFT data sent by the signal acquisition module 2 for data backup and recovery. The data storage module 4 includes an NVME hard disk 41. The NVMe (Non-Volatile Memory express) hard disk is a solid-state hard disk specification that uses a PCI-E channel (the PCI-E channel is a system interconnection technology for transmitting data and control information, based on a point-to-point serial transmission protocol, which can meet the needs of high bandwidth and low latency). The NVMe specification aims to make full use of the low latency and parallelism of the PCI-E channel, as well as the parallelism of contemporary processors, platforms and applications, and greatly improve the read and write performance of the solid-state hard disk at a controllable storage cost. The NVME hard disk 41 is a storage disk for collected and processed data, using a PCIe interface, supporting high-speed data storage, and storing a variety of data types.
[0033] The signal acquisition module 2 and the main control module 3 are both connected to the preprocessing module 5, which is used to perform further frequency conversion, signal demodulation, and noise suppression processing on the collected data, and store the preprocessed data on the local hard disk or transmit it to the main control module 3 via the network.
[0034] The implementation principle of a broadband acquisition and distribution platform suitable for satellite signal monitoring in an embodiment of the present application is as follows: the frequency conversion module 1 processes the received satellite signal, converts the satellite signal into an intermediate frequency signal and sends it to the signal acquisition module 2; then, the signal acquisition module 2 performs acquisition and processing operations on the intermediate frequency signal to realize digital processing of the analog signal, and sends the DDC and FFT data generated after processing to the main control module 3; finally, the main control module 3 performs broadband spectrum real-time monitoring and storage of the DDC and FFT data, and by controlling the optical fiber interface, the FPGA directly outputs multiple DDC data and spectrum data, completing the data acquisition, storage, and distribution functions to achieve the effect of high-speed and large-bandwidth data acquisition.
[0035] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A broadband acquisition and distribution platform suitable for satellite signal monitoring, characterized in that: include: A frequency conversion module (1), a signal acquisition module (2), and a main control module (3), wherein: The frequency conversion module (1) is in communication connection with the signal acquisition module (2), and the frequency conversion module (1) comprises an analog channel for performing signal filtering, amplification, down-conversion, and adjustable attenuation processing operations, and sending the processed intermediate frequency signal to the signal acquisition module (2); The signal acquisition module (2) is in communication connection with the main control module (3), and is used for collecting and processing the intermediate frequency signal, realizing digital processing of the analog signal, and sending the DDC and FFT data generated after processing to the main control module (3), wherein the signal acquisition module (2) comprises a high-speed analog-to-digital converter and an FPGA, and the FPGA is connected to a plurality of optical fiber interfaces; The main control module (3) is used to perform broadband spectrum real-time monitoring and storage of DDC and FFT data, and to directly output multiple channels of DDC data and spectrum data through the FPGA by controlling the optical fiber interface, thereby completing the data distribution function.
2. A broadband acquisition and distribution platform suitable for satellite signal monitoring according to claim 1, characterized in that: The signal acquisition module (2) and the main control module (3) are both connected to a data storage module (4); the data storage module (4) receives the DDC and FFT data sent by the signal acquisition module (2) for data backup and recovery.
3. A broadband acquisition and distribution platform suitable for satellite signal monitoring according to claim 1, characterized in that: The signal acquisition module (2) and the main control module (3) are both connected to a preprocessing module (5), and the preprocessing module (5) is used to perform further frequency conversion, signal demodulation, and noise suppression processing on the collected data, and store the preprocessed data in a local hard disk or transmit it to the main control module (3) via a network.
4. The broadband acquisition and distribution platform for satellite signal monitoring according to claim 1, characterized in that: The main control module (3) comprises a data distribution submodule (31), and the data distribution submodule (31) sends the processed data or the original data to a local display or transmits it to a remote user terminal via a network according to user requirements.
5. The broadband acquisition and distribution platform suitable for satellite signal monitoring according to claim 2, characterized in that: The data storage module (4) comprises an NVME hard disk (41).