CN110809005A - Unified characterization method for radar pulse description words - Google Patents
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- CN110809005A CN110809005A CN201911111312.9A CN201911111312A CN110809005A CN 110809005 A CN110809005 A CN 110809005A CN 201911111312 A CN201911111312 A CN 201911111312A CN 110809005 A CN110809005 A CN 110809005A
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Abstract
The invention provides a unified characterization method of radar pulse description words, which is characterized in that PDW formats generated by a receiver are sorted out, parameters simultaneously contained in each pulse description word format are taken, the greatest common divisor of the parameter resolution ratio is taken as the resolution ratio of the unified characterization format, unique parameters in each pulse description word format are summarized according to the original resolution ratio as the resolution ratio of the unified characterization format, various flag bits are put into flag bit fields of the unified characterization format, and all the parameters are spliced into the pulse description word format of the unified characterization method.
Description
Technical Field
The invention belongs to the field of electronic reconnaissance signal processing, and particularly relates to a unified characterization method of a radar pulse description word.
Background
The traditional radar pulse description word generating system and the sorting system are matched with each other, and parameters and resolution, total length of pulse description words, head and tail values and the like contained in different pulse description word formats are different, so that pulse description words of other systems cannot be used among different sorting systems, and scientific research and production are not facilitated.
Disclosure of Invention
The invention aims to provide a unified characterization method of a radar pulse description word.
The technical solution for realizing the purpose of the invention is as follows: a unified characterization method of a radar pulse description word comprises the following specific steps:
step 1, determining the format definition of a pulse description word generated by a receiver;
step 2, determining the field values of the head and the tail of the message of the unified representation method according to the head and the tail of the message of each pulse description word format;
step 3, for parameters simultaneously contained in each pulse description word format, taking the greatest common divisor of all parameter resolutions as the resolution of the unified representation format, calculating the maximum value of the parameter according to the resolution and the length of the parameter field, verifying whether the maximum value of the current parameter meets the threshold requirement of the equipment, if not, increasing the length of the field to the threshold requirement of the equipment, and taking the length of the field meeting the threshold requirement as the length of the field in the unified representation format;
and for the parameters contained in each pulse description word format, taking the resolution of the original parameters as the resolution of the unified representation format, and taking the length of the original field as the length of the field in the unified representation format.
Preferably, the specific formula for calculating the maximum value of the parameter according to the resolution and the length of the parameter field is as follows:
Cmax＝2L×N
in the formula, N is resolution, and L is parameter field length.
Compared with the prior art, the invention has the following remarkable advantages: the pulse description word represented by the invention contains all common parameters, meets the original precision requirement, can be used by different sorting systems, and improves the compatibility of a pulse description word generating system.
The present invention is described in further detail below with reference to the attached drawings.
Drawings
FIG. 1 is a flow chart of a unified characterization method of a radar pulse description word.
Detailed Description
A unified characterization method of a radar pulse description word comprises the following specific steps:
step 1, determining the format definition of a pulse description word generated by a receiver, as shown in tables 1, 2 and 3;
TABLE 1 pulse description word format, resolution example table
TABLE 2 pulse description word format, resolution example table
TABLE 3 pulse description word format, resolution example table
Step 2, determining the field values of the head and the tail of the message of the unified representation method according to the head and the tail of the message of each pulse description word format;
step 3, for parameters simultaneously contained in each pulse description word format, taking the greatest common divisor of all parameter resolutions as the resolution of a unified representation format, calculating the maximum value of the parameter according to the resolution and the length of the parameter field, verifying whether the maximum value of the current parameter meets the threshold requirement of each device, and if not, increasing the length of the field to the threshold requirement of the device;
and for the parameters contained in each pulse description word format, taking the resolution of the original parameters as the resolution of the unified representation format, and taking the length of the original field as the length of the field in the unified representation format.
The invention summarizes the format and the parameter resolution of the pulse description word generated by the current commonly used receiver, and generates a new pulse description word by using the invention under the condition of not losing all information in each pulse description word, thereby realizing the compatibility of different pulse description word generation systems and sorting systems and improving the scientific research and production efficiency.
Examples
A unified characterization method of a radar pulse description word comprises the following specific steps:
step 1, collecting format definitions of pulse description words generated by a common receiver, as shown in tables 1-3;
step 2, according to the message head and tail conditions of three pulse description word formats in the table, the message head of the unified representation format is set as 0xAA55, and the tail is set as 0x55 AA;
and 3, for parameters simultaneously contained in each pulse description word format, taking the greatest common divisor of each parameter resolution as the resolution of the unified characterization method, calculating the maximum value of the parameter according to the resolution and the length of the parameter field, verifying whether the maximum value of the current parameter meets the threshold requirement of the equipment, if not, increasing the length of the field to the threshold requirement of the equipment, and if not, increasing the length of the field.
The 16 bits behind the message header are determined as mark codes, marks applied in each format are put into the 16 bits of the mark codes in the unified representation format, wherein the value of each bit is 0 and is invalid, and 1 is valid. The 16 bits behind the marker code are determined as azimuth parameters, the highest precision 360/8192 of the azimuth parameters in each format is taken as the azimuth precision of the unified representation format, the true north is determined as the basis, the range of 1-8192 is determined to represent 0-360 degrees of azimuth information, wherein the code value is 0 to represent invalidity, and the debugging of a sorting system is facilitated. And determining 16bit behind the azimuth as a pitching parameter, taking the highest precision 360/8192 of the pitching parameter in each format as the pitching precision of the unified representation format, and determining the range of 1-8192 to represent-180 degrees of pitching information on the basis of leveling. The code value of 0 indicates invalidity, so that the sorting system is convenient to debug. And after pitching, 32 bits are set as frequency parameters, the highest precision 1/32M of the frequency in each format is taken as the frequency precision of a uniform representation format, and the length of the field is set as 32 bits because 16 bits are not enough to cover a common frequency range. And after the frequency, 32 bits are set as the bandwidth, the highest precision 1/32M of the bandwidth in each format is taken as the bandwidth precision of the unified representation format, the modulation modes related to the bandwidth are placed in the bandwidth field, 0-3 bits are set to mark the modulation modes, 4-15 bits are empty, and 16-31 bits are bandwidth values. And after the bandwidth, 32 bits are determined as pulse width, and 1nm which meets the pulse width parameter precision in each format and is convenient to debug is taken as the pulse width precision of the uniform representation format. Two 32 bits behind the pulse width are determined as a high order and a low order of the arrival time, and 1nm which meets the pulse width parameter precision in each format and is convenient to debug is taken as the arrival time cycle precision of the uniform representation format. And determining the amplitude after the arrival time, wherein the amplitude has no fixed resolution, and the amplitude representation method of the uniform representation format is determined as a code value of 0-255.
And for the parameters contained in each pulse description word format, taking the resolution of the original parameters as the resolution of the unified representation format, and taking the length of the original field as the length of the field in the unified representation format. After the amplitude field, a tracking channel number of 16 bits, a date time of 32 bits, an arrival time (second system) of 32 bits, a heading angle of 16 bits, a pitch of 16 bits, a roll of 16 bits, a sensitivity of 16 bits, a center frequency of 16 bits, and an azimuth code (original azimuth) of 16 bits are sequentially determined, and a blank of 48 bits is added to make the total length of the unified characterization method 512 bits convenient for memory operation, checksum of 16 bits, and finally characterized radar pulse descriptors are shown in table 4.
Table 4 uniform characterization format, resolution
Claims (2)
1. A unified characterization method for radar pulse description words is characterized by comprising the following specific steps:
step 1, determining the format definition of a pulse description word generated by a receiver;
step 2, determining the field values of the head and the tail of the message of the unified representation method according to the head and the tail of the message of each pulse description word format;
step 3, for parameters simultaneously contained in each pulse description word format, taking the greatest common divisor of all parameter resolutions as the resolution of the unified representation format, calculating the maximum value of the parameter according to the resolution and the length of the parameter field, verifying whether the maximum value of the current parameter meets the threshold requirement of the equipment, if not, increasing the length of the field to the threshold requirement of the equipment, and taking the length of the field meeting the threshold requirement as the length of the field in the unified representation format;
and for the parameters contained in each pulse description word format, taking the resolution of the original parameters as the resolution of the unified representation format, and taking the length of the original field as the length of the field in the unified representation format.
2. The method for uniformly characterizing radar pulse description words according to claim 1, wherein the specific formula for calculating the maximum value of the parameter according to the resolution and the length of the parameter field is as follows:
Cmax＝2L×N
in the formula, N is resolution, and L is parameter field length.
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