CN114866387A - Processing method and system for burst type satellite signals in high dynamic environment - Google Patents
Processing method and system for burst type satellite signals in high dynamic environment Download PDFInfo
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- CN114866387A CN114866387A CN202210780369.3A CN202210780369A CN114866387A CN 114866387 A CN114866387 A CN 114866387A CN 202210780369 A CN202210780369 A CN 202210780369A CN 114866387 A CN114866387 A CN 114866387A
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Abstract
The embodiment of the specification provides a processing method and a system for burst-type satellite signals in a high dynamic environment, which belong to the technical field of satellite communication, wherein the method comprises the following steps: obtaining a baseband digital signal to be analyzed, and caching the baseband digital signal to be analyzed in an RAM (random access memory); judging whether the length of data stored in the RAM memory meets a preset condition or not; if the length of the data stored in the RAM memory meets a preset condition, acquiring the data stored in the RAM memory; judging whether the data stored in the RAM memory has a burst data packet header or not; if the data stored in the RAM memory has a burst data packet header, reading a target baseband digital signal based on the initial position of the burst data packet header; updating a local carrier based on the target baseband digital signal; and a second I branch integral value and a second Q branch integral value are obtained based on the updated local carrier, and the telegraph text analysis is carried out, so that the accuracy of the analyzed telegraph text data is improved, and the error code is effectively reduced.
Description
Technical Field
The present disclosure relates to the field of satellite communications, and in particular, to a method and a system for processing a burst-type satellite signal in a high dynamic environment.
Background
The bidirectional data transmission of 'terminal-satellite-ground station' can be realized through the satellite, and the data communication can be realized in remote areas or ocean areas without ground base stations. At present, most of terminals are in a static or low-speed motion state, or the terminals are in a high-speed motion state, satellite signals are continuous signals, and when the terminals are in a high-speed motion state and the satellite signals are burst signals, the existing terminal cannot adapt. In the prior art, a local fixed frequency carrier is used for stripping a carrier of a received signal, the carrier can be normally analyzed when the carrier is in a static or low dynamic environment, and error codes are easily generated due to large carrier frequency deviation when the carrier is in a high dynamic environment.
Therefore, it is desirable to provide a method and a system for processing a burst-type satellite signal in a high dynamic environment, so as to achieve consistency between the frequency and phase of a local carrier and a received signal in the high dynamic environment, so as to accurately analyze text data and effectively reduce error codes.
Disclosure of Invention
One embodiment of the present disclosure provides a method for processing a burst-type satellite signal in a high dynamic environment, including: obtaining a baseband digital signal to be analyzed, and caching the baseband digital signal to be analyzed in an RAM (random access memory); judging whether the length of the data stored in the RAM memory meets a preset condition or not; if the length of the data stored in the RAM memory meets the preset condition, acquiring the data stored in the RAM memory; judging whether the data stored in the RAM memory has a burst data packet header or not; if the data stored in the RAM memory has a burst data packet header, reading a target baseband digital signal based on the initial position of the burst data packet header; updating a local carrier based on the target baseband digital signal; and acquiring a second I branch integral value and a second Q branch integral value based on the updated local carrier, and carrying out text analysis.
In the prior art, a local fixed frequency carrier is used for stripping a carrier of a received signal, the carrier can be normally analyzed when the carrier is in a static or low dynamic environment, and error codes are easily generated due to large carrier frequency deviation when the carrier is in a high dynamic environment.
In some embodiments, the storage depth of the baseband digital signal to be resolved in the RAM memory is greater than the length of 2 burst data packets.
In some embodiments, the determining whether the length of the data stored in the RAM memory satisfies a preset condition includes: judging whether the length of the data stored in the RAM memory is larger than the length of 1 burst data packet or not; and if the length of the data stored in the RAM memory is greater than the length of 1 burst data packet, the length of the data stored in the RAM memory meets a preset condition.
In some embodiments, said updating a local carrier based on said target baseband digital signal comprises:
multiplying and mixing the target baseband digital signal with a cos branch signal and a sin branch signal of a preset local carrier respectively to obtain a first I branch signal and a first Q branch signal; integrating the first I branch signal to obtain a first I branch integral value, and integrating the first Q branch signal to obtain a first Q branch integral value; sending the first I branch integral value and the first Q branch integral value into a phase discriminator to obtain a phase discrimination result; sending the phase discrimination result to a loop filter to obtain a loop filtering result; and sending the loop filtering result to a DDS carrier synthesizer to obtain cos branch signals and sin branch signals of the updated local carrier.
In some embodiments, the obtaining the second I branch integrated value and the second Q branch integrated value based on the updated local carrier includes multiplying and mixing the target baseband digital signal with a cos branch signal and a sin branch signal of the updated local carrier to obtain a second I branch signal and a second Q branch signal; and integrating the second I branch signal to obtain a second I branch integral value, and integrating the second Q branch signal to obtain a second Q branch integral value.
One embodiment of the present disclosure provides a system for processing a burst-type satellite signal in a high dynamic environment, including: the data storage module is used for acquiring a baseband digital signal to be analyzed and caching the baseband digital signal to be analyzed in an RAM (random access memory); the RAM is also used for judging whether the length of the data stored in the RAM meets a preset condition or not; the RAM is also used for acquiring the data stored in the RAM if the length of the data stored in the RAM meets the preset condition; the RAM is also used for judging whether the data stored in the RAM memory has a burst data packet header or not; the processor is further configured to read a target baseband digital signal based on an initial position of a burst data packet header if the data stored in the RAM memory has the burst data packet header; the loop tracking analysis module is used for updating a local carrier based on the target baseband digital signal; and the local carrier is also used for acquiring a second I branch integral value and a second Q branch integral value based on the updated local carrier, and carrying out text analysis.
In some embodiments, the storage depth of the baseband digital signal to be resolved in the RAM memory is greater than the length of 2 burst data packets.
In some embodiments, the data storage module is further to: judging whether the length of the data stored in the RAM memory is larger than the length of 1 burst data packet or not; and if the length of the data stored in the RAM memory is greater than the length of 1 burst data packet, the length of the data stored in the RAM memory meets a preset condition.
In some embodiments, the loop trace resolution module is further to: multiplying and mixing the target baseband digital signal with a cos branch signal and a sin branch signal of a preset local carrier respectively to obtain a first I branch signal and a first Q branch signal; integrating the first I branch signal to obtain a first I branch integral value, and integrating the first Q branch signal to obtain a first Q branch integral value; sending the first I branch integral value and the first Q branch integral value into a phase discriminator to obtain a phase discrimination result; sending the phase discrimination result to a loop filter to obtain a loop filtering result; and sending the loop filtering result to a DDS carrier synthesizer to obtain cos branch signals and sin branch signals of the updated local carrier.
In some embodiments, the loop trace resolution module is further to: multiplying and mixing the target baseband digital signal with the cos branch signal and the sin branch signal of the updated local carrier to obtain a second I branch signal and a second Q branch signal; and integrating the second I branch signal to obtain a second I branch integral value, and integrating the second Q branch signal to obtain a second Q branch integral value.
One of the embodiments of the present disclosure provides an apparatus for processing a burst-type satellite signal in a high dynamic environment, including a processor, where the processor is configured to perform a method for processing a burst-type satellite signal in a high dynamic environment.
One embodiment of the present disclosure provides a computer-readable storage medium, where the storage medium stores computer instructions, and when the computer instructions in the storage medium are read by a computer, the computer executes a method for processing a burst-type satellite signal in a high dynamic environment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Wherein:
FIG. 1 is an exemplary block diagram of a system for processing bursty satellite signals in a high dynamic environment according to some embodiments described herein;
FIG. 2 is an exemplary flow chart of a method for processing a satellite burst signal in a high dynamic environment according to some embodiments of the present disclosure;
FIG. 3 is a schematic diagram illustrating the acquisition of a baseband digital signal to be resolved in accordance with some embodiments of the present description;
FIG. 4 is a schematic diagram of a loop trace resolution module updating a local carrier based on a target baseband digital signal in accordance with some embodiments of the present description;
fig. 5 is a schematic diagram of a loop filter shown in accordance with some embodiments herein.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only examples or embodiments of the present description, and that for a person skilled in the art, the present description can also be applied to other similar scenarios on the basis of these drawings without inventive effort. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.
It should be understood that "system", "apparatus", "unit" and/or "module" as used herein is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.
As used in this specification and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
Flow charts are used in this description to illustrate operations performed by a system according to embodiments of the present description. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.
Fig. 1 is an exemplary block diagram of a system for processing a satellite signal in a high dynamic environment in accordance with some embodiments of the present disclosure.
As shown in fig. 1, a system for processing a burst-type satellite signal in a high dynamic environment may include a data storage module and a loop tracking and analyzing module.
The data storage module can be used for acquiring the baseband digital signal to be analyzed and caching the baseband digital signal to be analyzed in the RAM memory; the RAM is also used for judging whether the length of the data stored in the RAM meets a preset condition or not; the RAM is also used for acquiring the data stored in the RAM if the length of the data stored in the RAM meets a preset condition; the RAM is also used for judging whether the data stored in the RAM memory has a burst data packet header or not; and the processor is also used for reading the target baseband digital signal based on the initial position of the burst data packet header if the data stored in the RAM memory has the burst data packet header. In some embodiments, the data storage module may be further operable to: judging whether the length of data stored in the RAM memory is larger than the length of 1 burst data packet or not; and if the length of the data stored in the RAM memory is greater than the length of 1 burst data packet, the length of the data stored in the RAM memory meets a preset condition.
In some embodiments, the data storage module may include a processing device, which may be used to perform the functions described above. In some embodiments, the processing device may execute on a cloud platform. For example, the cloud platform may include one or any combination of a private cloud, a public cloud, a hybrid cloud, a community cloud, a decentralized cloud, an internal cloud, and the like. In some embodiments, the processing device 110 may comprise a processor, which may comprise one or more sub-processors (e.g., a single core processing device or a multi-core processing device). Merely by way of example, a processor may include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), an Application Specific Instruction Processor (ASIP), a Graphics Processor (GPU), a Physical Processor (PPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), a programmable logic circuit (PLD), a controller, a microcontroller unit, a Reduced Instruction Set Computer (RISC), a microprocessor, and the like or any combination thereof.
The loop tracking resolution module may be configured to update the local carrier based on the target baseband digital signal. In some embodiments, the loop trace resolution module may be further operable to: multiplying and mixing the target baseband digital signal with a cos branch signal and a sin branch signal of a preset local carrier respectively to obtain a first I branch signal and a first Q branch signal; integrating the first I branch signal to obtain a first I branch integral value, and integrating the first Q branch signal to obtain a first Q branch integral value; sending the first I branch integral value and the first Q branch integral value into a phase discriminator to obtain a phase discrimination result; sending the phase discrimination result to a loop filter to obtain a loop filtering result; and sending the loop filtering result to a DDS carrier synthesizer to obtain cos branch signals and sin branch signals of the updated local carrier.
The loop tracking analysis module can be further used for acquiring a second I branch integral value and a second Q branch integral value based on the updated local carrier to perform text analysis. In some embodiments, the loop trace resolution module may be further operable to: multiplying and mixing the target baseband digital signal with the cos branch signal and the sin branch signal of the updated local carrier to obtain a second I branch signal and a second Q branch signal; the signal processing module may obtain a second I branch integral value, and integrate the second Q branch signal to obtain a second Q branch integral value.
For more description of the data storage module and the loop tracking resolution module, reference may be made to fig. 2 and the related description thereof, which are not repeated herein.
It should be noted that the above description of the processing system and the modules thereof for burst-mode satellite signals in a high dynamic environment is only for convenience of description, and the present specification is not limited to the scope of the illustrated embodiments. It will be appreciated by those skilled in the art that, given the teachings of the present system, any combination of modules or sub-system configurations may be used to connect to other modules without departing from such teachings. In some embodiments, the data storage module, the carrier update module and the signal processing module disclosed in fig. 1 may be different modules in a system, or may be a module that implements the functions of two or more modules. For example, each module may share one memory module, and each module may have its own memory module. Such variations are within the scope of the present disclosure.
Fig. 2 is an exemplary flow chart of a method for processing a burst oriented satellite signal in a high dynamic environment according to some embodiments of the present disclosure. As shown in fig. 2, the method for processing a burst-type satellite signal in a high dynamic environment includes the following steps. In some embodiments, the processing method of the burst oriented satellite signal in the high dynamic environment may be performed by a processing system of the burst oriented satellite signal in the high dynamic environment.
And step 210, acquiring the baseband digital signal to be analyzed, and caching the baseband digital signal to be analyzed in an RAM memory. In some embodiments, step 210 may be performed by a data storage module.
Referring to fig. 3, in some embodiments, the data storage module may receive information to be processed based on the antenna. In some embodiments, the data storage module may store the baseband digital signal in the RAM memory at an AD sampling clock frequency storage cycle. In some embodiments, the storage depth of the baseband digital signal to be resolved in the RAM memory is greater than the length of 2 burst data packets. In some embodiments, the length of 1 burst packet may be 2000-5000 bits.
Step 220, determining whether the length of the data stored in the RAM memory meets a preset condition. In some embodiments, step 220 may be performed by a data storage module.
The preset condition may be a preset condition for triggering the detection of the burst data packet header. In some embodiments, the predetermined condition may include a threshold, for example, a length of 1 burst of data packets.
In some embodiments, the determining, by the data storage module, whether the length of the data stored in the RAM memory satisfies a preset condition includes:
judging whether the length of data stored in the RAM memory is larger than the length of 1 burst data packet or not;
and if the length of the data stored in the RAM memory is greater than the length of 1 burst data packet, the length of the data stored in the RAM memory meets a preset condition.
In step 230, if the length of the data stored in the RAM memory meets a preset condition, the data stored in the RAM memory is obtained. In some embodiments, step 230 may be performed by a data storage module.
Step 240, determine whether there is a burst packet header in the data stored in the RAM memory. In some embodiments, step 240 may be performed by a data storage module.
The header of the burst data packet is fixed data, and the data size of the burst data packet is generally 80-200 bits.
In some embodiments, the data storage module may determine whether the burst packet header exists in the data stored in the RAM memory based on a similarity between the data stored in the RAM memory and a preset burst packet header.
For example, when the similarity between the data stored in the RAM memory and the preset burst packet header is greater than a preset threshold (e.g., 90%), it may be determined that the burst packet header exists in the data stored in the RAM memory.
In step 250, if the data stored in the RAM memory has a burst data packet header, the target baseband digital signal is read based on the start position of the burst data packet header. In some embodiments, step 240 may be performed by a data storage module.
It is understood that the data storage module may read the target baseband digital signal from the start position of the burst data packet header, and the data before the start position of the burst data packet header is not read.
Step 260, updating the local carrier based on the target baseband digital signal. In some embodiments, step 240 may be performed by the loop trace resolution module.
It is understood that, in order to reduce the error code, the loop tracking parsing module may update the local carrier based on the target baseband digital signal, so that the frequency and phase of the updated local carrier are consistent with the target baseband digital signal.
Referring to fig. 4, in some embodiments, the loop tracking resolution module updates the local carrier based on the target baseband digital signal, which may include:
multiplying and mixing the target baseband digital signal with a cos branch signal and a sin branch signal of a preset local carrier respectively to obtain a first I branch signal and a first Q branch signal;
integrating the first I branch signal to obtain a first I branch integral value, and integrating the first Q branch signal to obtain a first Q branch integral value;
sending the first I branch integral value and the first Q branch integral value into a phase discriminator to obtain a phase discrimination result;
sending the phase discrimination result to a loop filter to obtain a loop filtering result;
and sending the loop filtering result to a DDS carrier synthesizer to obtain cos branch signals and sin branch signals of the updated local carrier.
Referring to fig. 5, in some embodiments, the loop filter may be a third-order loop filter, and to implement signal processing in a high dynamic environment, the parameters of the third-order loop filter are set as follows: w is a group of P =22.9, a =1.1, b = 2.4; t is the telegraph text rate period, and T is less than or equal to 1 ms.
And 270, acquiring a second I branch integral value and a second Q branch integral value based on the updated local carrier, and analyzing the telegraph text. In some embodiments, step 270 may be performed by the loop trace resolution module.
In some embodiments, the loop tracking parsing module obtaining the second I-branch integrated value and the second Q-branch integrated value based on the updated local carrier may include:
multiplying and mixing the target baseband digital signal with the cos branch signal and the sin branch signal of the updated local carrier to obtain a second I branch signal and a second Q branch signal;
and integrating the second I branch signal to obtain a second I branch integral value, and integrating the second Q branch signal to obtain a second Q branch integral value.
It can be understood that the second I branch integral value and the second Q branch integral value obtained by the loop tracking parsing module are parsed into text messages and converted into serial data, and the bottom layer text message information transmitted by the satellite signal is obtained and enters the subsequent module for processing.
It can be understood that, in the prior art, the carrier wave of the received signal is stripped by using the local fixed frequency carrier wave, when the carrier is in a static or low dynamic environment, the carrier wave can be analyzed normally, when the carrier is in a high dynamic environment, because the carrier frequency deviation is large, the error code is easy to generate, the method adopts a loop tracking mode, even if the carrier wave is a pulse signal, the received signal still keeps stable carrier tracking, and the frequency and the phase of the local carrier wave can be kept consistent with the received signal under the high dynamic environment, thereby accurately analyzing the text data and effectively reducing the error code.
One of the embodiments of the present disclosure provides an apparatus for processing a burst-type satellite signal in a high dynamic environment, including a processor, where the processor is configured to perform a method for processing a burst-type satellite signal in a high dynamic environment.
One embodiment of the present disclosure provides a computer-readable storage medium, where the storage medium stores computer instructions, and when the computer instructions in the storage medium are read by a computer, the computer executes a method for processing a burst-type satellite signal in a high dynamic environment.
It should be noted that the above description of the rf processing method of the combiner is only for illustration and description, and does not limit the application scope of the present specification. It will be apparent to those skilled in the art that various modifications and variations can be made in the rf processing method of the combiner under the guidance of the present specification. However, such modifications and variations are intended to be within the scope of the present description.
Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing detailed disclosure is to be regarded as illustrative only and not as limiting the present specification. Various modifications, improvements and adaptations to the present description may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present specification and thus fall within the spirit and scope of the exemplary embodiments of the present specification.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROZ, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A method for processing burst-mode satellite signals in a high dynamic environment is characterized by comprising the following steps:
obtaining a baseband digital signal to be analyzed, and caching the baseband digital signal to be analyzed in an RAM (random access memory);
judging whether the length of the data stored in the RAM memory meets a preset condition or not;
if the length of the data stored in the RAM memory meets the preset condition, acquiring the data stored in the RAM memory;
judging whether the data stored in the RAM memory has a burst data packet header or not;
if the data stored in the RAM memory has a burst data packet header, reading a target baseband digital signal based on the initial position of the burst data packet header;
updating a local carrier based on the target baseband digital signal;
and acquiring a second I branch integral value and a second Q branch integral value based on the updated local carrier, and carrying out text analysis.
2. The method as claimed in claim 1, wherein the storage depth of the baseband digital signal to be analyzed in the RAM memory is greater than 2 burst packets in length.
3. The method for processing satellite signals in a burst mode under a high dynamic environment according to claim 1, wherein the determining whether the length of the data stored in the RAM memory satisfies a predetermined condition includes:
judging whether the length of the data stored in the RAM memory is larger than the length of 1 burst data packet or not;
and if the length of the data stored in the RAM memory is greater than the length of 1 burst data packet, the length of the data stored in the RAM memory meets a preset condition.
4. The method for processing satellite signals in a burst mode under a high dynamic environment according to any one of claims 1 to 3, wherein the updating the local carrier based on the target baseband digital signal comprises:
multiplying and mixing the target baseband digital signal with a cos branch signal and a sin branch signal of a preset local carrier respectively to obtain a first I branch signal and a first Q branch signal;
integrating the first I branch signal to obtain a first I branch integral value, and integrating the first Q branch signal to obtain a first Q branch integral value;
sending the first I branch integral value and the first Q branch integral value into a phase discriminator to obtain a phase discrimination result;
sending the phase discrimination result to a loop filter to obtain a loop filtering result;
and sending the loop filtering result to a DDS carrier synthesizer to obtain cos branch signals and sin branch signals of the updated local carrier.
5. The method for processing the satellite signal burst according to claim 4, wherein the obtaining the second I-branch integrated value and the second Q-branch integrated value based on the updated local carrier comprises:
multiplying and mixing the target baseband digital signal with the cos branch signal and the sin branch signal of the updated local carrier to obtain a second I branch signal and a second Q branch signal;
and integrating the second I branch signal to obtain a second I branch integral value, and integrating the second Q branch signal to obtain a second Q branch integral value.
6. A processing system of burst-type satellite signals in a high dynamic environment comprises;
the data storage module is used for acquiring a baseband digital signal to be analyzed and caching the baseband digital signal to be analyzed in an RAM (random access memory); the RAM is also used for judging whether the length of the data stored in the RAM meets a preset condition or not; the RAM is also used for acquiring the data stored in the RAM if the length of the data stored in the RAM meets the preset condition; the RAM is also used for judging whether the data stored in the RAM memory has a burst data packet header or not; the processor is further configured to read a target baseband digital signal based on an initial position of a burst data packet header if the data stored in the RAM memory has the burst data packet header;
the loop tracking analysis module is used for updating a local carrier based on the target baseband digital signal; and the local carrier is also used for acquiring a second I branch integral value and a second Q branch integral value based on the updated local carrier to analyze the telegraph text.
7. The system for processing satellite signals in bursts under high dynamic environment as claimed in claim 6, wherein the storage depth of the baseband digital signals to be resolved in the RAM memory is greater than the length of 2 data packets in bursts.
8. The system for processing satellite signals in a high dynamic environment, as set forth in claim 6, wherein the data storage module is further configured to:
judging whether the length of the data stored in the RAM memory is larger than the length of 1 burst data packet or not;
and if the length of the data stored in the RAM memory is greater than the length of 1 burst data packet, the length of the data stored in the RAM memory meets a preset condition.
9. The system for processing satellite signals in a high dynamic environment according to any one of claims 6 to 8, wherein the loop tracking analysis module is further configured to:
multiplying and mixing the target baseband digital signal with a cos branch signal and a sin branch signal of a preset local carrier respectively to obtain a first I branch signal and a first Q branch signal;
integrating the first I branch signal to obtain a first I branch integral value, and integrating the first Q branch signal to obtain a first Q branch integral value;
sending the first I branch integral value and the first Q branch integral value into a phase discriminator to obtain a phase discrimination result;
sending the phase discrimination result to a loop filter to obtain a loop filtering result;
and sending the loop filtering result to a DDS carrier synthesizer to obtain cos branch signals and sin branch signals of the updated local carrier.
10. The system for processing satellite signals in a high dynamic environment, as set forth in claim 9, wherein the loop tracking resolution module is further configured to:
multiplying and mixing the target baseband digital signal with the cos branch signal and the sin branch signal of the updated local carrier to obtain a second I branch signal and a second Q branch signal;
and integrating the second I branch signal to obtain a second I branch integral value, and integrating the second Q branch signal to obtain a second Q branch integral value.
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| CN202210780369.3A CN114866387B (en) | 2022-07-05 | 2022-07-05 | Processing method and system for burst type satellite signals in high dynamic environment |
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