CN-121995343-A - Radar near zone target detection method and system based on semi-pulse pressure factor

CN121995343ACN 121995343 ACN121995343 ACN 121995343ACN-121995343-A

Abstract

The application relates to the technical field of radar detection, in particular to a radar near-area target detection method and system based on a half pulse pressure factor. The method comprises the steps of generating a factor library based on a transmitting signal, obtaining radar feedback data, setting a half pulse execution strategy according to the radar feedback data and a preset compression processing model, carrying out pulse compression processing on radar echo data according to the half pulse execution strategy, generating a waveform measurement result according to a pulse pressure result and a splicing instruction, constructing various half pulse pressure factors by utilizing back section data of full pulse pressure factors, and carrying out pulse compression on the radar echo data by dynamically adjusting processing parameters (processing data section proportion and selected half pulse pressure factors) of the half pulse pressure when detecting a target in a waveform mismatch interval, so that the signal-to-noise ratio, main-side flap ratio and ranging accuracy of the target are improved.

Inventors

XU WENWEN
Quan shuanglong
CHEN ZHIYAO
ZHANG PING

Assignees

安徽耀峰雷达科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260409

Claims (10)

1. A radar near zone target detection method based on a half pulse pressure factor is characterized by comprising the following steps: generating a factor library based on the transmit signal; Acquiring radar feedback data, and setting a half-pulse execution strategy according to the radar feedback data and a preset compression processing model; pulse compression processing is carried out on radar echo data according to a half pulse execution strategy, and a waveform measurement result is generated according to a pulse pressure result and a splicing instruction; the factor library comprises a single whole-pulse pressure factor and a plurality of half-pulse pressure factors; The radar feedback data includes radar base data and radar echo data.
2. The radar near zone target detection method based on a half pulse pressure factor as claimed in claim 1, wherein the preset compression processing model comprises: presetting a plurality of radar modes; A radar pattern array a is established, a= (a 1, a2.. ai...an), wherein ai is the ith radar mode; n is the number of radar modes; Sequentially setting ai as a target mode according to the radar mode sequence A; setting a reference processing strategy of a target mode; The reference processing strategy comprises a half pulse pressure processing range, a data segmentation length and a segmentation-half pulse pressure factor mapping table; Setting an auxiliary correction strategy of a target mode; Generating a semi-pulse pressure sub-strategy of a target mode, wherein the semi-pulse pressure sub-strategy comprises a reference processing strategy and an auxiliary correction strategy; and sequentially generating semi-pulse pressure sub-strategies of each radar mode, and establishing a compression processing model according to all the semi-pulse pressure sub-strategies.
3. The radar near zone target detection method based on the half pulse pressure factor as claimed in claim 2, wherein the auxiliary correction strategy for setting the target mode comprises: presetting a plurality of signal-to-noise ratio intervals; sequentially selecting a target interval from all signal-to-noise ratio intervals; setting a range correction amount of the reference processing strategy in the target section; setting the range correction quantity of the reference processing strategy in each signal-to-noise ratio interval in sequence; And generating an auxiliary correction strategy of the target mode according to the full-range correction quantity.
4. The radar near zone target detection method based on a half pulse pressure factor as claimed in claim 3, wherein said setting a half pulse execution strategy comprises: presetting a plurality of receiving time nodes; acquiring radar basic data and radar echo data of a current receiving time node; constructing an operation mode of the current receiving time node according to the radar basic data; generating a fitting value of the operation mode and each radar mode; selecting an execution sub-strategy of the current receiving time node according to all the fit values; generating an expected signal-to-noise ratio of the current receiving time node; selecting an execution correction amount of the current time node according to the expected signal-to-noise ratio; and generating a half-pulse execution strategy of the current receiving time node according to the execution sub-strategy and the execution correction quantity.
5. The radar near zone target detection method based on the half pulse pressure factor of claim 4, wherein the pulse compression processing of the radar echo data comprises: Acquiring radar echo data of a current receiving time node; Generating a full pulse pressure data segment and a half pulse pressure data segment according to the half pulse execution strategy and the radar echo data; Establishing a first storage space and a second storage space; Distributing the whole pulse pressure factors to a first storage space, and distributing all the half pulse pressure factors to a second storage space; Setting pulse compression parameters of the full pulse pressure data section and outputting a full pulse pressure result; setting pulse compression parameters of the half pulse pressure data section and outputting a half pulse pressure result.
6. The method for radar near zone target detection based on a half pulse pressure factor as claimed in claim 5, wherein said setting pulse compression parameters of the half pulse pressure data segment comprises: Setting a segmentation instruction of a half pulse pressure data segment based on a half pulse execution strategy, and generating a plurality of data subsections according to the segmentation instruction; establishing a data subsection number column B; B= (B1, b2... bi...bm), wherein, the bi is the generation of the ith data sub-segment according to the half pulse pressure data segment; m is the number of data fields in the half pulse pressure data segment; sequentially selecting target data subsections according to the data subsections array B; setting a segmentation-half pulse pressure factor mapping table in a half pulse execution strategy as a first-level mapping table; Setting a mapping half pulse pressure factor of a target data subsection according to the first-level mapping table; Sequentially selecting mapping half pulse pressure factors of all data subsections; And setting pulse compression parameters of the half pulse pressure data segment according to all the mapping half pulse pressure factors.
7. A radar near zone target detection system based on a half pulse pressure factor, employing the radar near zone target detection method based on a half pulse pressure factor as claimed in any one of claims 1 to 6, comprising: the factor unit is used for generating a factor library according to the emission signals, wherein the factor library comprises a whole pulse pressure factor and a plurality of half pulse pressure factors; the central operation unit is used for acquiring radar feedback data; the radar feedback data comprises radar basic data and radar echo data; the central operation unit includes: the first processing module is used for establishing a compression processing model; the second processing module is used for setting a half-pulse execution strategy according to the radar feedback data and a preset compression processing model; and the third processing module is used for carrying out pulse compression processing on the radar echo data according to the half pulse execution strategy and generating a waveform measurement result according to the pulse pressure result and the splicing instruction.
8. The radar near zone target detection system based on a half pulse pressure factor of claim 7, wherein the first processing module is further configured to: presetting a plurality of radar modes; A radar pattern array a is established, a= (a 1, a2.. ai...an), wherein ai is the ith radar mode; n is the number of radar modes; Sequentially setting ai as a target mode according to the radar mode sequence A; setting a reference processing strategy of a target mode; The reference processing strategy comprises a half pulse pressure processing range, a data segmentation length and a segmentation-half pulse pressure factor mapping table; Setting an auxiliary correction strategy of a target mode; Generating a semi-pulse pressure sub-strategy of a target mode, wherein the semi-pulse pressure sub-strategy comprises a reference processing strategy and an auxiliary correction strategy; Sequentially generating semi-pulse pressure sub-strategies of each radar mode, and establishing a compression processing model according to all the semi-pulse pressure sub-strategies; Wherein, the auxiliary correction strategy for setting the target mode comprises the following steps: presetting a plurality of signal-to-noise ratio intervals; sequentially selecting a target interval from all signal-to-noise ratio intervals; setting a range correction amount of the reference processing strategy in the target section; setting the range correction quantity of the reference processing strategy in each signal-to-noise ratio interval in sequence; And generating an auxiliary correction strategy of the target mode according to the full-range correction quantity.
9. The radar near zone target detection system based on a half pulse pressure factor of claim 8, wherein the second processing module is further configured to: presetting a plurality of receiving time nodes; acquiring radar basic data and radar echo data of a current receiving time node; constructing an operation mode of the current receiving time node according to the radar basic data; generating a fitting value of the operation mode and each radar mode; selecting an execution sub-strategy of the current receiving time node according to all the fit values; generating an expected signal-to-noise ratio of the current receiving time node; selecting an execution correction amount of the current time node according to the expected signal-to-noise ratio; and generating a half-pulse execution strategy of the current receiving time node according to the execution sub-strategy and the execution correction quantity.
10. The radar near zone target detection system based on a half pulse pressure factor of claim 9, wherein the third processing module is further configured to: Acquiring radar echo data of a current receiving time node; Generating a full pulse pressure data segment and a half pulse pressure data segment according to the half pulse execution strategy and the radar echo data; Establishing a first storage space and a second storage space; Distributing the whole pulse pressure factors to a first storage space, and distributing all the half pulse pressure factors to a second storage space; Setting pulse compression parameters of the full pulse pressure data section and outputting a full pulse pressure result; setting pulse compression parameters of a half pulse pressure data section and outputting a half pulse pressure result; Wherein, set up the pulse compression parameter of half pulse pressure data section, include: Setting a segmentation instruction of a half pulse pressure data segment based on a half pulse execution strategy, and generating a plurality of data subsections according to the segmentation instruction; establishing a data subsection number column B; B= (B1, b2... bi...bm), wherein, the bi is the generation of the ith data sub-segment according to the half pulse pressure data segment; m is the number of data fields in the half pulse pressure data segment; sequentially selecting target data subsections according to the data subsections array B; setting a segmentation-half pulse pressure factor mapping table in a half pulse execution strategy as a first-level mapping table; Setting a mapping half pulse pressure factor of a target data subsection according to the first-level mapping table; Sequentially selecting mapping half pulse pressure factors of all data subsections; And setting pulse compression parameters of the half pulse pressure data segment according to all the mapping half pulse pressure factors.

Description

Radar near zone target detection method and system based on semi-pulse pressure factor Technical Field The application relates to the technical field of radar detection, in particular to a radar near-area target detection method and system based on a half pulse pressure factor. Background In pulsed doppler radar, the radar emits a simple rectangular pulse, which measures distance with an inherent contradiction, the detection distance of the radar being dependent on the energy of the pulse. The greater the energy, the greater the detection distance. The energy of the pulse is calculated as peak power x pulse width. In the case of a limited peak power transmitter, increasing the energy of the pulse requires increasing the pulse width, which however affects the detection capability of the radar near field target. In the process of radar signal reception, in order to prevent leakage of the transmitted signal from affecting the quality of the received signal (in order to prevent a powerful received signal from directly burning out a sensitive receiver), the receiving channel is shielded during signal transmission, and in the process of signal shielding, detection of a near-zone target is affected. When the target is very close, the echo is only the signal of the rear part, and when pulse compression is carried out, the echo signal of the front part is shielded, so that waveform mismatch is caused, and the peak signal-to-noise ratio of the pulse pressure result is not high or the peak value is submerged in noise. When the pulse emitted by the radar is wider, the detection capability of a near-area target is weaker, and the detection blind area of the radar is larger. Disclosure of Invention The application aims to solve the technical problems, provides a radar near-zone target detection method and system based on a half pulse pressure factor, and aims to improve the detection capability of targets in a waveform mismatch zone. In some embodiments of the present application, a plurality of half pulse pressure factors are constructed by using the back-end data of the full pulse pressure factors, and when detecting the target in the waveform mismatch interval, the radar echo data is pulse-compressed by dynamically adjusting the processing parameters (the proportion of the processing data segment and the selected half pulse pressure factor) of the half pulse pressure, so as to improve the signal-to-noise ratio, the main-side lobe ratio and the ranging accuracy of the target. In some embodiments of the present application, the data range of the half pulse pressure processing is dynamically adjusted according to the current echo data, when the signal-to-noise ratio is higher, the half pulse pressure processing range is enlarged, so that the data processing speed is improved, when the signal-to-noise ratio is lower, the half pulse pressure processing range is reduced, the detection performance is improved, and the balance between the detection precision and the calculation efficiency is realized. In some embodiments of the present application, a radar near zone target detection method based on a half pulse pressure factor is provided, including: generating a factor library based on the transmit signal; Acquiring radar feedback data, and setting a half-pulse execution strategy according to the radar feedback data and a preset compression processing model; pulse compression processing is carried out on radar echo data according to a half pulse execution strategy, and a waveform measurement result is generated according to a pulse pressure result and a splicing instruction; the factor library comprises a single whole-pulse pressure factor and a plurality of half-pulse pressure factors; The radar feedback data includes radar base data and radar echo data. In some embodiments of the present application, the preset compression processing model includes: presetting a plurality of radar modes; A radar pattern array a is established, a= (a 1, a2.. ai...an), wherein ai is the ith radar mode; n is the number of radar modes; Sequentially setting ai as a target mode according to the radar mode sequence A; setting a reference processing strategy of a target mode; The reference processing strategy comprises a half pulse pressure processing range, a data segmentation length and a segmentation-half pulse pressure factor mapping table; Setting an auxiliary correction strategy of a target mode; Generating a semi-pulse pressure sub-strategy of a target mode, wherein the semi-pulse pressure sub-strategy comprises a reference processing strategy and an auxiliary correction strategy; and sequentially generating semi-pulse pressure sub-strategies of each radar mode, and establishing a compression processing model according to all the semi-pulse pressure sub-strategies. In some embodiments of the present application, the auxiliary correction strategy for setting the target mode includes: presetting a plurality of signal-to-noise ratio intervals;