A method of radar bow clutter suppression

Abstract

The application discloses a radar ship bow interference suppression method, according to the ship bow structure to determine the radar distribution position, according to the number and position of the ship bow interference source, the radar distribution position is adjusted, according to the radar coverage range requirement and the required radar frequency band to determine the number of radars, according to the coverage range of each radar to determine the corresponding frequency band, so that multiple radar frequency bands can realize all-around coverage of the ship bow position, based on the radar distribution position and the coverage range requirement to confirm the radar azimuth and elevation, so that the ship bow direction can realize the reception of radar signals, based on the interference source signal frequency to adjust the beam scanning rate and the repetition period of the corresponding radar, adjust the pulse width of the corresponding radar, adjust the radar frequency band based on the distance change parameter of the detection echo, determine the receiving amplifier power according to the radar echo receiving frequency, and carry out the signal processing of the corresponding radar. The application can reduce the interference frequency of the ship bow radar.

Description

TECHNICAL FIELD

[0001] The present application relates to radar applications, in particular to a radar bow interference suppression method. BACKGROUND

[0002] Radar is also known as radio positioning, which is an electronic device for detecting targets using electromagnetic waves. The structure of radar includes a transmitter, a transmitting antenna, a receiver, a receiving antenna, a processing part, and a display, as well as auxiliary equipment such as power supply equipment, data acquisition equipment, and anti-interference equipment. Screws are the most commonly used fastening parts and are an indispensable part of radar. The detection means of radar has developed from only one radar detector to the integration and cooperation of infrared light, ultraviolet light, laser, and other optical detection means. Radar can emit electromagnetic waves to irradiate targets and receive their echoes to obtain information such as the distance, distance change rate (radial velocity), azimuth, and altitude of the targets from the electromagnetic wave emission point. The specific use and structure of various radars are not the same, but the basic form is consistent, including a transmitter, a transmitting antenna, a receiver, a receiving antenna, a processing part, and a display, as well as auxiliary equipment such as power supply equipment, data acquisition equipment, and anti-interference equipment. Radar plays a similar role to the eyes and ears, but it is not a natural masterpiece. Its information carrier is radio waves. In fact, visible light and radio waves are essentially the same thing, both of which are electromagnetic waves that propagate at the speed of light in a vacuum. The difference lies in their respective frequencies and wavelengths. The principle of radar is that the transmitter of the radar device emits electromagnetic wave energy in a certain direction through the antenna, and the objects in this direction reflect the electromagnetic waves that they encounter. The radar antenna receives the reflected waves and sends them to the receiving device for processing to extract certain information about the objects.

[0003] There are many types of radars, and the classification methods are very complex. Radars can usually be classified according to their use, such as early warning radars, search and warning radars, guidance and command radars, height measurement radars, airborne radars, weather radars, and navigation radars. In the existing patent "CN201320738799.5 A ship navigation radar system", it can reduce signal interference and make the radar image clearer. However, the radar installed at the bow of the ship has various interference sources, which not only limits the radar frequency band of the monitored direction, but also generates interference sources from the bow itself, which can affect the effective monitoring of the radar. Moreover, the radar is easily affected by the frequency of the interference source, leading to complex radar reception echo frequency bands, which are not easy to effectively distinguish, and affecting radar monitoring. Therefore, a radar bow interference suppression method is proposed to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a radar bow interference suppression method.

[0005] The technical solution for achieving the object of the application is as follows: a radar ship bow interference suppression method, comprising the following steps:

[0006] Step 1, determining the radar distribution position according to the ship bow structure, adjusting the radar distribution position according to the number and position of the ship bow interference sources, determining the number of radars according to the radar coverage range requirement and the required radar frequency band, and installing the radars after the number and position of the radars are determined;

[0007] Step 2, determining the corresponding frequency band according to the coverage range of each radar, so that the multiple radar frequency bands can realize all-around coverage of the ship bow position;

[0008] Step 3, confirming the radar azimuth and elevation based on the radar distribution position and the coverage range requirement, so that the ship bow direction can realize the reception of radar signals;

[0009] Step 4, adjusting the beam scanning rate and repetition period of the corresponding radar based on the interference source signal frequency, and adjusting the pulse width of the corresponding radar, so as to minimize the radar interference rate, and adjusting the radar frequency band based on the distance change parameter of the detected echo;

[0010] Step 5, determining the receiving amplifier power according to the radar echo receiving frequency, and performing signal processing on the corresponding radar, so that the radar can achieve maximum working efficiency.

[0011] Further, a filter is installed in the radar, and the filter is used to filter the interference frequency band.

[0012] Further, the method further comprises the steps of detecting the interference source signal frequency and selecting the corresponding radar frequency based on the interference source.

[0013] Further, multiple radars are arranged at the ship bow position, and radars are arranged on both sides of the ship bow to realize all-around coverage.

[0014] A radar ship bow interference suppression system is used to implement the radar ship bow interference suppression method and realize radar ship bow interference suppression.

[0015] Compared with the prior art, the application has the following advantages: the number and distribution position of the radars are determined according to the ship bow structure, the frequency band of the ship bow radar is confirmed based on the frequency band and position of the ship bow interference source, the interference source frequency is dispersed in the determined radar frequency band, the interference frequency received by the radar can be minimized, and the anti-interference capability of the ship bow radar is improved; the frequency band of the radar is determined based on the ship bow use environment, so that the radar monitoring can meet the requirement, and the radar coverage range can be improved as much as possible; the anti-interference function of the radar monitoring can be effectively improved by increasing the radar echo receiving frequency, and the application is suitable for reducing the interference frequency of the ship bow radar. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1A flow chart of a radar ship bow interference suppression method. DETAILED DESCRIPTION

[0017] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0018] Embodiment one

[0019] A radar ship bow interference suppression method, comprising the following steps:

[0020] (1) determining the ship bow area position, determining the radar distribution position based on the ship bow structure and the interference source distribution;

[0021] (2) multi-band radar installation, determining the number of radars based on the ship bow area position;

[0022] (3) radar frequency band confirmation, determining the radar frequency band based on the ship bow interference source and the sailing route;

[0023] (4) adjusting the azimuth and elevation of the receiving beam, adjusting the elevation and azimuth of the receiving beam to achieve uniform signal distribution;

[0024] (5) parameter change adjustment, adjusting the pulse width, repetition period and beam scanning rate parameters of the radar;

[0025] (6) signal receiving and processing, determining the power of the receiving amplifier and the signal processor.

[0026] In the step (1), the radar distribution position is determined according to the ship bow structure, and the ship bow interference source position is determined, the radar distribution position is adjusted based on the interference source, a plurality of radars are arranged at the ship bow position, and radars are arranged on both sides of the ship bow to achieve full coverage.

[0027] In the step (1), after the number and position of the ship bow interference sources are determined, the signal frequency of the interference source is detected, and the corresponding radar frequency is selected based on the interference source.

[0028] In the step (2), the number of radars is determined according to the radar coverage range requirement and the required radar frequency band, and the radars are installed after the number and position of the radars are determined.

[0029] In the step (3), the corresponding frequency band is determined according to the coverage range of each radar, so that the multiple radar frequency bands achieve full coverage of the ship bow position.

[0030] In the step (3), a filter is installed in the radar, and the interference band is filtered through the filter.

[0031] The step (4) confirms the azimuth and elevation of the radar based on the radar distribution position and the coverage requirement, so that the bow direction can receive the radar signal.

[0032] The step (5) adjusts the beam scanning rate and repetition period of the corresponding radar based on the signal frequency of the interference source, and adjusts the pulse width of the corresponding radar to minimize the radar interference rate as much as possible.

[0033] The step (5) adjusts the radar frequency band based on the distance variation parameter of the detected echo.

[0034] The step (6) determines the power of the receiving amplifier according to the radar echo receiving frequency, and performs signal processing and data processing of the corresponding radar, so that the radar can achieve maximum working efficiency.

[0035] The above method is suitable for all-around monitoring of the bow radar, which can improve the radar anti-interference capability of the bow position and monitor comprehensively, but the cost is relatively high.

[0036] Embodiment two

[0037] A radar bow interference suppression method, comprising the following steps:

[0038] (1) determining the position of the bow area, determining the radar distribution position based on the bow structure and the distribution of the interference source;

[0039] (2) multi-band radar installation, determining the number of radars based on the position of the bow area;

[0040] (3) radar frequency band confirmation, determining the radar frequency band based on the bow interference source and the sailing route;

[0041] (4) adjusting the receiving beam azimuth and elevation, adjusting the receiving beam elevation and azimuth to achieve uniform signal distribution;

[0042] (5) parameter change adjustment, adjusting the pulse width, repetition period and beam scanning rate parameters of the radar;

[0043] (6) signal receiving processing, determining the power of the receiving amplifier and the signal processor.

[0044] The step (1) determines the radar distribution position according to the bow structure, determines the position of the bow interference source, adjusts the radar distribution position based on the interference source, sets two radars at the bow position and sets radars on both sides of the bow to achieve all-around coverage.

[0045] After determining the number and position of the bow interference source in the step (1), the signal frequency of the interference source is detected, and the corresponding radar frequency is selected based on the interference source.

[0046] The step (2) determines the number of radars according to the radar coverage requirement and the required radar frequency band, and installs the radars after determining the number and position of the radars.

[0047] The step (3) determines the corresponding frequency band according to the coverage of each radar, so that the multiple radar frequency bands realize the full coverage of the bow position.

[0048] The step (3) installs a filter in the radar, and filters the interference frequency band through the filter.

[0049] The step (4) confirms the azimuth and elevation of the radar based on the distribution position of the radar and the coverage requirement, so that the bow direction can realize the reception of the radar signal.

[0050] The step (5) adjusts the beam scanning rate and repetition period of the corresponding radar based on the signal frequency of the interference source, and adjusts the pulse width of the corresponding radar to minimize the radar interference rate as much as possible.

[0051] The step (5) adjusts the radar frequency band based on the distance change parameter of the detected echo.

[0052] The step (6) determines the receiving amplifier power according to the radar echo receiving frequency, and performs signal processing and data processing of the corresponding radar, so that the radar can achieve maximum working efficiency.

[0053] The above method is suitable for the omnidirectional monitoring of the bow radar, and can improve the radar anti-interference capability of the bow position, and has comprehensive monitoring and low cost.

[0054] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0055] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method for suppressing radar bow interference, characterized in that, Includes the following steps: Step 1: Determine the radar distribution location based on the bow structure; adjust the radar distribution location based on the number and location of interference sources at the bow; determine the number of radars based on radar coverage requirements and the required radar frequency bands; and install the radars after determining the number and location. Step 2: Determine the corresponding frequency band based on the coverage range of each radar, so that multiple radar frequency bands can achieve full coverage of the bow position. Step 3: Confirm the radar azimuth and elevation angle based on the radar distribution location and coverage requirements to enable radar signal reception in the bow direction. Step 4: Adjust the beam scanning rate and repetition period of the corresponding radar based on the frequency of the interference source signal, and adjust the pulse width of the corresponding radar to minimize the radar interference rate. Adjust the radar frequency band based on the distance change parameters of the detected echo. Step 5: Determine the power of the receiving amplifier based on the radar echo reception frequency, and perform corresponding radar signal processing to maximize the radar's operating efficiency.

2. The radar bow interference suppression method according to claim 1, characterized in that, Install filters in the radar to filter out interference bands.

3. The radar bow interference suppression method according to claim 1, characterized in that, It also includes the steps of detecting the frequency of the interference source signal and selecting the corresponding radar frequency based on the interference source.

4. The radar bow interference suppression method according to claim 1, characterized in that, Multiple radars are installed at the bow, and radars are also installed on both sides of the bow to achieve full coverage.

5. A radar bow interference suppression system, characterized in that, Implement the radar bow interference suppression method according to any one of claims 1-4 to achieve radar bow interference suppression.

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