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Design method of admm-based low intercept frequency controlled array mimo radar system under clutter

A design method and technology of frequency control array, applied to radio wave measurement systems, instruments, etc., can solve the problems that the energy control in a specific area cannot be realized, and the array pattern has nothing to do with distance

Active Publication Date: 2020-11-10
HUBEI UNIV OF TECH
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  • Application Information

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Problems solved by technology

The existing literature considering LPI takes the phased array as the research object, and uses the phased array to realize the space scanning of the beam, but the disadvantage of the phased array is that its array pattern has nothing to do with the distance, and it can only realize the orientation of the array signal and cannot realize the specific Zone Energy Control

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  • Design method of admm-based low intercept frequency controlled array mimo radar system under clutter
  • Design method of admm-based low intercept frequency controlled array mimo radar system under clutter
  • Design method of admm-based low intercept frequency controlled array mimo radar system under clutter

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Embodiment Construction

[0066] The relevant theory and specific implementation process based on the implementation of the present invention will be described in detail below, so that the advantages and characteristics of the present invention can be more easily understood by those skilled in the art, so as to make the protection scope of the present invention clearer and clearer defined.

[0067] (1) Signal model construction

[0068] Consider the model of a narrowband frequency-steered array MIMO (FDA-MIMO) radar system whose array consists of M t transmit antennas and M r composed of receiving antennas, the signal x transmitted by the mth transmitting antenna at time t m (t) See formula (1), m=1,2,...,M t .

[0069]

[0070] In formula (1):

[0071] j represents the imaginary unit;

[0072] w m Represents the transmit waveform weighting vector of the mth transmit antenna;

[0073] 0≤t≤T n ,T n Indicates the radar pulse duration;

[0074] s(t)=[s 1 (t),s 2 (t),...,s K (t)] T , whic...

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Abstract

The invention discloses a design method of an ADMM-based low-interception frequency control array MIMO radar transceiver system under clutter, including: S0: constructing a multi-proportion optimization problem, initializing the number of iterations of the outer loop, the number of iterations of the inner loop, and the transmit beam matrix; S1: Fix the current transmit beam matrix, based on the multi-proportion optimization problem, use the adaptive beam method to calculate the receive filter; S2: fix the receive filter under this iteration, and use the alternating direction multiplier method to update the transmit beam vector; S3: repeat the steps S1-S2 perform loop iterations; S4: Design a low-intercept frequency-steered-array MIMO radar system based on the final transmit beam matrix and receive filter. Considering the environment of clutter, interference and noise and the limitation of transmission energy on the antenna, the present invention constructs the optimization problem into a multi-proportion fractional programming problem, and optimizes the transmission signal by means of a cyclic iteration method. The invention forms a zero trap in the target area, reduces the probability of the radar being intercepted and simultaneously realizes the maximum output SINR.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a design method of an ADMM-based low-interception frequency control array MIMO radar transceiver system under clutter, which is used to suppress clutter, interference and noise signals coherent with the signal, and detect targets at the same time Reduces the probability of radar being intercepted. Background technique [0002] In modern electronic countermeasures, the increasingly changeable and complex radar electromagnetic environment puts forward new requirements for low-interception technology. It is hoped that the radar system can adjust the parameters of the transmitter in real time according to changes in the target and the environment to achieve better low interception effect. Low probability of intercept (LPI) radar can detect targets while reducing the probability of being discovered by the enemy, and provide guarantee for the safety of rada...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02G01S7/282
CPCG01S7/023G01S7/282
Inventor 巩朋成王兆彬谭海明邓薇朱鑫潮周顺李婕张正文丰励贺章擎
Owner HUBEI UNIV OF TECH
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