Optimization Method of Airborne Radar Clutter Power Spectrum Based on Doppler Channel Division
A technology of Doppler channel and clutter power is applied in the simulation of ground clutter power spectrum for airborne phased array radar, and in the field of optimization of airborne radar clutter power spectrum. Array radar system design and signal processing are inconvenient, and the ground clutter simulation data cannot be obtained in time, so as to shorten the time and reduce the number of blocks.
Active Publication Date: 2018-03-06
XIDIAN UNIV
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Assuming that there are M Doppler channels in the simulation, M is a natural number greater than 1, and the clutter on a range ring is divided into N independent clutter blocks, generally to ensure that the accuracy of the simulated ground clutter data is high enough Let N be much larger than M, but actually there are only M Doppler channels, which makes it too long to run the ground clutter simulation program due to the large number of clutter blocks divided by a range ring, so that it cannot be obtained in time The simulation data of ground clutter, which in turn caused great inconvenience to the system design and signal processing of the airborne phased array radar
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[0022] refer to figure 1 , is a flow chart of a method for optimizing the power spectrum of airborne radar clutter based on Doppler channel division of the present invention, and the method for optimizing the power spectrum of airborne radar clutter based on Doppler channel division comprises the following steps :
[0023] Step 1, establishing the geometric model of the airborne phased array radar, in the geometric model of the airborne phased array radar, the main beam azimuth angle of the antenna of the airborne phased array radar is θ 0 , the pitch angle of the main antenna beam of the airborne phased array radar is The number of Doppler channels of the airborne phased array radar is N d , and the airborne phased array radar receives the ground clutter within the detection range, and evenly divides the ground clutter into L clutter rings according to the set width Δl, and the slant distance corresponding to the lth clutter ring is R l , and then divide each clutter ring ...
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The invention discloses an airborne phased array radar clutter power spectrum optimization method. The idea of the method is that an airborne phased array radar geometric model is established, and ground clutter normalization Doppler frequency received by airborne phased array radar is acquired, based on which transmitting signal voltage gain of the airborne phased array radar and receiving signal voltage gain of the airborne phased array radar are obtained so that double signal voltage gain and double signal power gain of the airborne phased array radar are obtained; then a clutter ring grazing angle and clutter block area on a clutter block are obtained according to clutter ring slant distance so that clutter power of the airborne phased array radar is obtained, based on which clutter power of the airborne phased array radar and a clutter covariance matrix are obtained; and finally azimuth steering vectors and pitch steering vectors of the airborne phased array radar are obtained and then space-domain steering vectors and space-time steering vectors of the airborne phased array radar, a clutter and noise covariance matrix of the airborne phased array radar and a clutter power spectrum of the airborne phased array radar are obtained in turn.
Description
technical field [0001] The invention belongs to the technical field of radar, and in particular relates to an optimization method of airborne radar clutter power spectrum based on Doppler channel division, which is suitable for the simulation of ground clutter power spectrum by airborne phased array radar. Background technique [0002] Radar is an indispensable equipment in modern warfare. It is a device that detects targets and measures target information through electromagnetic waves and receiving echoes. However, when the target exists in the natural environment, the natural environment will also scatter the electromagnetic wave or the received echo, which will interfere with the target detection. These interferences are called radar clutter. For the airborne phased array radar that adopts the look-down working mode, the impact of ground clutter on target detection is very prominent, so the suppression ability of ground clutter becomes an important index to test the perfo...
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IPC IPC(8): G01S13/02G01S7/40G01S7/292
CPCG01S7/2923G01S7/4052G01S13/02G01S2013/0245
Inventor 王彤王婷婷夏月明李博文
Owner XIDIAN UNIV