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Multiple carrier frequency MISO radar target locating method based on priori knowledge

A technology of prior knowledge and radar target, applied in the field of high-precision target positioning of multi-input single-output radar, it can solve the problems of inability to obtain speed compensation, poor real-time performance, and large amount of calculation, achieving fast calculation speed and overcoming ranging error. Large, accurate targeting effect

Inactive Publication Date: 2013-11-27
XIDIAN UNIV
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Problems solved by technology

The disadvantages of this method are that the amount of calculation is huge, the real-time performance is poor, and it will only converge to the local optimal solution due to noise interference, and the real speed compensation cannot be obtained.

Method used

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  • Multiple carrier frequency MISO radar target locating method based on priori knowledge
  • Multiple carrier frequency MISO radar target locating method based on priori knowledge
  • Multiple carrier frequency MISO radar target locating method based on priori knowledge

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] Refer to attached figure 1 , the concrete steps of the present invention are as follows.

[0039] Step 1, receiving target echo signals.

[0040] The single antenna of the small mobile platform receives the target echo signal transmitted by the multi-carrier frequency MISO radar ground array;

[0041] Step 2, preprocessing.

[0042] The target echo signal and its transmitted reference signal are demodulated and processed to obtain a non-linear frequency modulated signal. Use a low-pass filter to channel-separate the above-mentioned signals to obtain multiple single-frequency signals. The range compression processing is performed on the single-frequency signal respectively, a narrow beam is formed in the range search range, and the signal of the range unit corresponding to the maximum point of the narrow beam is used as the target signal.

[0043] ...

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Abstract

The invention discloses a multiple carrier frequency MISO radar target locating method based on priori knowledge and mainly aims at solving the problem that in the prior art, the target distance speed coupling is serious so that target speed can not be obtained. The method comprises the following steps: (1) receiving target return signals; (2) pre-processing; (3) confirming a target roughly-measured distance; (4) integrating pulses and processing apertures; (5) confirming the target distance; (6) locating targets. The multiple carrier frequency MISO radar target locating method based on the priori knowledge utilizes the priori knowledge to confirm a target locating angle and the target distance so as to avoid the problem that target speed can not be solved in a single frequency modulation cycle and achieve the purpose of precisely solving the target distance. The multiple carrier frequency MISO radar target locating method is applied to the condition that in the actual application, requirements for signal data processing efficiency is high, and can be used by multiple carrier frequency MISO radar to locate aerial targets.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a multi-input single-output (Multiply Input Single Output, MISO) radar high-precision target positioning method based on prior knowledge in the technical field of target positioning. The invention utilizes the priori knowledge of the auxiliary radar to determine the target azimuth and the target distance, and uses the target azimuth and the target distance as the estimated position of the target, which is used for the high-precision positioning of the air target by the multi-carrier frequency MISO radar. Background technique [0002] The multi-carrier frequency MISO radar is a multi-antenna array with a radiation orthogonal waveform at the transmitting end and a single antenna at the receiving end. In some applications, it is necessary to allow a small mobile platform (aircraft or ship) to locate the target, but such a platform is often unable to place a large-apertur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/06G01S13/32
Inventor 杨明磊郭维娜倪链
Owner XIDIAN UNIV
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