Cooperative anti-jamming transmission power allocation method of networked radar
A networked radar and transmit power technology, applied in the field of networked radar transmit power distribution, can solve the problems of not considering the difference between the interference environment and the target environment, and low target detection probability.
Inactive Publication Date: 2016-03-02
XIDIAN UNIV
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Problems solved by technology
In view of the impact of interference on the detection performance of networked radars, most of the existing networked radars use an equal power allocation strategy, that is, allocate a fixed transmit power to each node radar, and do not consider the difference between the interference environment and the target environment faced by each node radar , resulting in a very low detection probability of the target
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[0033] refer to figure 1 , the use scenario of the present invention includes a networked radar composed of N node radars, each node radar has an independent transmission signal, there is a target in the far field of space, and there is a long-distance support jammer at the same time, and the jammer simultaneously targets each Node radar jamming.
[0034] refer to figure 2 , the specific implementation steps of the present invention are as follows:
[0035] Step 1: Calculate the receiver noise power P of each node radar Wi .
[0036] According to the radar receiver noise model, estimate the receiver noise power P of each node radar Wi :
[0037] P Wi =KTB i f i ,
[0038] Among them, K=1.38×10 -23 is the Boltzmann constant, T=290 is the temperature constant, B i is the receiver bandwidth of the i-th node radar, F i is the receiver noise figure of the i-th radar, i=1,2,3,...,N, N is the number of node radars in the networked radar.
[0039] Step 2: Estimate the sc...
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The invention discloses a networked radar cooperative anti-jamming transmission power distribution method, which mainly solves the problem of radar transmission power distribution of each node of the networked radar. The implementation steps are: 1. Estimate the noise power of the radar receiver of each node, and estimate the standard deviation of the target relative to the radar scattering cross-sectional area of each node when the jamming is not turned on; 2. After the jamming is turned on, estimate the interference signal received by the radar of each node. Average power; 3. Establish the radar receiving signal model of each node; 4. Calculate the mutual information between the radar echo signal of each node and the scattering characteristics of the target, and according to the mutual information, calculate the mutual information between the networked radar received echo signal and the scattering characteristics of the target. 5. Determine the optimization equation of transmit power distribution, and solve the optimization equation to obtain the optimized radar transmit power of each node. The method of the invention can effectively optimize the transmitting power of each node radar, and can be used in a networked radar system.
Description
technical field [0001] The invention belongs to the field of radar technology, in particular to a networked radar transmission power allocation method under the condition of cooperative anti-jamming, which can be used to optimize the transmission power distribution of the networked radar system under the condition of active interference, and improve the performance of the networked radar under the condition of active interference. Under the target detection performance. Background technique [0002] Suppressive jamming is to use the jamming signal obtained by noise to cover or submerge the useless signal, so that the useful signal received by the receiving electronic equipment is blurred or completely covered, so that it cannot work normally, which seriously affects the detection and identification of the target by the radar. [0003] Networked radar refers to an organic radar network composed of multiple node radars with the same or different systems. It has flexible workin...
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IPC IPC(8): G01S7/36
CPCG01S7/023G01S7/282G01S7/35
Inventor 张娟赵永红张林让赵珊珊刘楠
Owner XIDIAN UNIV