CN109995417B - Method for generating satellite-borne SAR combined data to transmission channel data functional module - Google Patents

Method for generating satellite-borne SAR combined data to transmission channel data functional module Download PDF

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CN109995417B
CN109995417B CN201910017430.7A CN201910017430A CN109995417B CN 109995417 B CN109995417 B CN 109995417B CN 201910017430 A CN201910017430 A CN 201910017430A CN 109995417 B CN109995417 B CN 109995417B
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data
functional module
transmission channel
join
function
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CN109995417A (en
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范季夏
陶满意
景桂凤
汪少林
邹莹
路瑞峰
纪鹏
陆洋
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Shanghai Institute of Satellite Engineering
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Shanghai Institute of Satellite Engineering
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00—Arrangements for software engineering
    • G06F8/30—Creation or generation of source code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance

Abstract

The invention provides a method for generating a satellite-borne SAR combined data-to-transmission channel data functional module, which comprises the following steps: selecting Matlab software and language as a development environment for designing a functional module, and selecting a function form as a model for designing the functional module; defining function names and input and output parameters according to the function form and the external interface content; the program development of the functional module is realized by calling a Matlab software command; and packaging according to the developed function M file to realize interface matching and fusion of the functional module and the integrated test system. The method mainly solves the problems of high efficiency, standardization, universalization and expandability of combined data transfer transmission channel data in the process of satellite-borne SAR ground satellite-mounted integration test or ground application processing, meets the requirement of standardized development of a satellite-borne SAR ground satellite-mounted integration test system or a ground application processing system, and improves the efficiency of integration test and ground application processing.

Description

Method for generating satellite-borne SAR combined data to transmission channel data functional module
Technical Field
The invention relates to a ground integration test or ground application processing of a satellite-borne SAR, in particular to a method for generating a functional module for converting combined data of the satellite-borne SAR into transmission channel data. In particular to a technology for converting standardized generalized satellite-borne SAR combined data into transmission channel data required by integrated test or ground application processing.
Background
The satellite-borne SAR echo data are downloaded to the ground through a data transmission subsystem, a ground data transmission server decodes the echo data downloaded by the satellite to generate multi-channel transmission channel data, and for convenience of data management, the multi-channel transmission channel data are required to be regularly combined to form dat combining data of 1 file. In the subsequent data processing process, the combined data needs to be converted into multi-channel transmission channel data, and the transmission correctness of the data of each transmission channel can be judged and detected through data conversion.
Before the invention, the combined data is not converted into the transmission channel data by independently developed software or programs, the function is only contained in the whole data format conversion, the condition of independently judging and detecting the correctness of the transmission channel data is not provided, and the function cannot adapt to the development of a standardized ground integrated test system or a ground application system and cannot realize the requirements of high-efficiency and automatic test or data processing.
With the continuous development of the satellite-borne SAR technology, particularly the development of a high-resolution SAR satellite, the amount of echo data acquired by one-time startup imaging is larger and larger, and for efficiently managing and processing mass data, an efficient integrated test system or a ground application processing system needs to be developed; and secondly, aiming at the requirements of generalization, expandability and replaceability, the whole processing flow needs to be subjected to modularized division and standardized design and development according to the functional characteristics.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for generating a satellite-borne SAR combined data-to-transmission channel data functional module.
The invention provides a method for generating a satellite-borne SAR combined data-to-transmission channel data functional module, which comprises the following steps:
the method comprises the following steps: selecting Matlab software and language as a development environment for designing a functional module, and selecting a function form as a model for designing the functional module;
step two: defining function names and input and output parameters according to the function form and the external interface content;
step three: the program development of the functional module is realized by calling a Matlab software command;
step four: and packaging according to the developed function M file to realize interface matching and fusion of the functional module and the integrated test system.
Preferably, in the step one:
and selecting a function with input and output parameters as a standardized development module of the functional module.
Preferably, in the step two:
defining join _ data _ to _ transmit _ data as a function name; defining an address path character array where the combination data join _ data is located, a frame length detection result frame _ check _ result array of the combination data join _ data, a pulse sequence pulse _ list array needing data conversion and a combination stepping join _ step as input parameters; and defining the converted transmission channel data transmit _ data array as an output parameter, wherein the array form is a cellular array.
Preferably, in the third step:
taking the pulse as a cycle unit;
firstly, calling fopen commands to open combiner data;
secondly, calling a fseek command according to the frame header position corresponding to each pulse to position the initial position of the pulse and calling a fread command according to the frame length to read the combined data of the pulse;
then, calculating the combining combination repetition times according to the combining stepping join _ step, the frame length calculation and the transmission channel number; calling kron and replay commands to form position information of each transmission channel data in the combined data;
and finally, extracting the data of each transmission channel from the combined data according to the position information and storing the data as an array.
Preferably, in step four:
the choice is based on the idea of componentized packaging to carry out standardized packaging and solidification on the join _ data _ to _ transmit _ data.m.
According to the computer-readable storage medium stored with the computer program provided by the invention, when the computer program is executed by a processor, the steps of the method for generating the satellite-borne SAR combined path data-to-transmission channel data functional module are realized.
Compared with the prior art, the invention has the following beneficial effects:
the method mainly solves the problems of high efficiency, standardization, universalization and expandability of combined data transfer transmission channel data in the process of satellite-borne SAR ground satellite-mounted integration test or ground application processing, meets the requirement of standardized development of a satellite-borne SAR ground satellite-mounted integration test system or a ground application processing system, and improves the efficiency of integration test and ground application processing.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a diagram of an idea of a method for generating a functional module for converting satellite-borne SAR combined data into multi-channel data according to the present invention;
fig. 2 is a program algorithm design diagram of the satellite-borne SAR combined path data transfer channel data of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Aiming at a functional module for converting combined data into transmission channel data, the invention realizes the standardized design and development of the functional module by adopting Matlab software and language, applying a function form, defining input and output external interface parameters, developing a conversion algorithm adapting to parallel operation and adopting a packaging technology based on a componentization idea. The function module after standardized design and development can form a test flow or a processing flow with other function modules according to the external interface parameters to complete specific tasks, and can only realize the upgrade of the ground integrated test system or the ground application processing system by an upgrade algorithm on the basis of not changing the input and output external interface parameters of the function modules, thereby realizing the purposes of generalization and expandability of the whole ground integrated test system or the ground application system.
The invention provides a method for generating a satellite-borne SAR combined data-to-transmission channel data functional module, which comprises the following steps:
the method comprises the following steps: matlab software and language are selected as the development environment of functional module design, and a function form is selected as a model of functional module design. Firstly, the mature, stable and efficient operational performance is optimized; secondly, selecting simple and convenient various commands; and thirdly, a function form with input and output parameters is preferred, so that the design development with standardization, expandability and replacement is facilitated. In the first step: and selecting a function with input and output parameters as a standardized development module of the functional module.
Step two: defining function names and input and output parameters according to the function form and the external interface content; referring to fig. 2, a function form is adopted, external interface contents are defined, and function names and input and output parameters are defined. In the second step: defining join _ data _ to _ transmit _ data as a function name; defining an address path character array where combined data join _ data is located, a frame length detection result frame _ check _ result array of the combined data join _ data, a pulse sequence pulse _ list array needing data conversion and a combined stepping join _ step as input parameters, wherein the frame _ check _ result array is an array of N _1 rows multiplied by M _1 columns, the rows represent all pulse numbers of the combined data join _ data, the columns respectively represent a frame length, a frame header position, a system working state word and an interruption state word corresponding to each pulse, the pulse _ list is an array of 1 row multiplied by M _2 columns, and the columns represent random integers from small to large from 1 to N _ 1; defining a converted transmission channel data transmit _ data array as an output parameter, wherein the array is in a cellular array form and contains M _1 elements, each cellular element is N _2 rows multiplied by M _3 columns, wherein the N _2 rows represent the number of transmission channels corresponding to each pulse, and the M _3 columns represent the number of bytes corresponding to each transmission channel.
Step three: the program development of the functional module is realized by calling a Matlab software command; specifically, referring to fig. 2, a data conversion algorithm based on a Matlab parallel operation toolbox is developed by combining with a satellite-borne SAR combining algorithm, and program development is realized by calling related commands of Matlab software. In the third step: defining ii as a pulse number variable of a pulse sequence pulse _ list by taking a pulse as a cycle unit, wherein ii is 1: length (pulse _ list); firstly, calling fopen commands to open combiner data; secondly, calling a fseek command according to the frame header position corresponding to each pulse to position the initial position of the pulse and calling a fread command according to the frame length to read the combined data of the pulse; then, calculating the combining combination repetition times according to the combining stepping join _ step, the frame length calculation and the transmission channel number; calling kron and replay commands to form position information of each transmission channel data in the combined data; and finally, extracting the data of each transmission channel from the combined data according to the position information and storing the data as an array.
Step four: and packaging according to the developed function M file to realize interface matching and fusion of the functional module and the integrated test system. Specifically, a packaging technology based on a componentization idea is adopted to carry out standardized, generalized, extensible and callable packaging, and interface matching and fusion of a functional module and an integrated test system are realized. In the fourth step: the choice is based on the idea of componentized packaging to carry out standardized packaging and solidification on the join _ data _ to _ transmit _ data.m.
The present invention will be described more specifically with reference to preferred examples. The improvement of the invention mainly relates to data format conversion algorithm design, function design and standardized packaging design.
1. Data format conversion algorithm design
And generating a position matrix of each pulse transmission channel data in the combined data according to the frame length detection result frame _ check _ result array, the pulse sequence pulse _ list array which needs to be subjected to data conversion, the combined stepping join _ step and the converted channel number channel _ num, and then directly extracting the arrays to form each transmission channel data.
2. function design
The method comprises the steps that a forming development program of a Matlab standard function is adopted, firstly, combined data, a storage path of a dat file, a frame length detection result array, a pulse sequence array group needing to be converted, a combined stepping and the number of channels needing to be converted are defined as input parameters, and a converted multi-channel data element packet array is defined as an output parameter; secondly, calling fseek and fread command functions when the combined data are read, and calling kron and repmat command functions when a position array of the multi-channel data corresponding to each pulse in the combined data is formed; and finally, program development is carried out among the pulses according to the requirement of meeting the parallel operation rule.
3. Standardized package design
Firstly, carrying out Matlab algorithm modification, mainly aiming at join _ data _ to _ transmit _ data. m files, wherein a standardized function header is added, and function output is join _ data _ to _ transmit _ data (input);
second, add input parameter interface, where path is input, frame _ check _ result, pulse _ list is input, pulse _ list, and join _ step is input, join _ step; and thirdly, adding an output parameter interface, output, transmit _ data, or transmit _ data. And secondly, carrying out Matlab algorithm calling, wherein a Matlab engine adopts a Client/Server (Client/Server) computing mode. In software, the Qt program acts as a client to pass commands and data to the Matlab engine and receives the return results of the calculations and data from the engine. The Matlab engine serves as a server and calls a parallel tool box to perform distributed parallel computation in the background after receiving related commands and data.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (1)

1. A method for generating a satellite-borne SAR combined data-to-transmission channel data functional module is characterized by comprising the following steps:
the method comprises the following steps: selecting Matlab software and language as a development environment for designing a functional module, and selecting a function form as a model for designing the functional module;
step two: defining function names and input and output parameters according to the function form and the external interface content;
step three: the program development of the functional module is realized by calling a Matlab software command;
step four: packaging according to the developed function M file to realize interface matching and fusion of the functional module and the integrated test system;
in the second step:
defining join _ data _ to _ transmit _ data as a function name; defining an address path character array where the combination data join _ data is located, a frame length detection result frame _ check _ result array of the combination data join _ data, a pulse sequence pulse _ list array needing data conversion and a combination stepping join _ step as input parameters; defining the converted transmission channel data transmit _ data array as an output parameter, wherein the array form is a cellular array;
in the third step:
taking the pulse as a cycle unit;
firstly, calling fopen commands to open combiner data;
secondly, calling a fseek command according to the frame header position corresponding to each pulse to position the initial position of the pulse and calling a fread command according to the frame length to read the combined data of the pulse;
then, calculating the combining combination repetition times according to the combining stepping join _ step, the frame length calculation and the transmission channel number; calling kron and replay commands to form position information of each transmission channel data in the combined data;
finally, extracting data of each transmission channel from the combined data according to the position information and storing the data as an array;
in the first step:
selecting a function with input and output parameters as a standardized development module of the functional module;
in the fourth step:
the method comprises the following steps of selecting to carry out standardized packaging and solidification on the join _ data _ to _ transmit _ data.m based on a componentized packaging idea:
adding a standardized function header, function output = join _ data _ to _ transmit _ data (input);
an input parameter interface is added to the system,
path =input.path、frame_check_result=input.frame_check_result、pulse_list=input. pulse_list、join_step=input.join_step；
an output parameter interface is added, output. transmit _ data = transmit _ data.
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