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Waveform optimization method for improving MIMO-STAP detection performance

A waveform optimization and performance technology, applied in the field of signal processing, can solve the problem of data processing only at the receiving end

Inactive Publication Date: 2014-09-03
DALIAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Although B. Friedlander and C. Y. Chen improved the detection performance of MIMO radar by optimizing the transmission waveform, they did not apply this idea to MIMO-STAP
Although Wang G. has conducted more in-depth research on MIMO-STAP, it is limited to data processing at the receiving end.

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  • Waveform optimization method for improving MIMO-STAP detection performance
  • Waveform optimization method for improving MIMO-STAP detection performance
  • Waveform optimization method for improving MIMO-STAP detection performance

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Embodiment Construction

[0051] Attached below figure 2 The implementation steps of the present invention are further described in detail:

[0052] (1) Establish MIMO-STAP model

[0053] 1a) MIMO-STAP received signal description

[0054] Consider as shown in the accompanying drawings figure 1 MIMO-STAP scenario shown. In this scenario, the transmitting array and receiving array of the MIMO radar are both uniform linear arrays and placed in parallel, and the number of array elements is and , and the array element spacing is and . The radar platform flies in a straight line at a constant speed along the direction parallel to the transmitting and receiving arrays, and the flying height and speed are respectively and . The angle between the target and the transmitting and receiving array normal is motion in a straight line with a speed of , and is in the same plane as the radar platform. Within a coherent processing interval (CPI), each transmitting array element radiates simultaneou...

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Abstract

The invention discloses a method for improving MIMO-STAP detection performance through the design of emission waveform, and puts forward that the waveform optimization problem is simplified to be the SDP problem based on diagonal Loading, so that a convex optimization method can be utilized to find solution. The waveform optimization method can be realized by the following steps: (1) establishing an MIMO-STAP model so as to obtain space-time snapshot expression in an interest distance ring; (2) under the condition of clutter Gauss distribution, and interference uncorrelated, and under the condition of an optimal MIMO-STAP processor, outputting SINR expression; (3) under the condition of emission waveform energy constraints, expressing the problem of waveform optimization for improving the system detection performance; and (4) finding solution for the problem of waveform optimization based on a diagonal loading method.

Description

technical field [0001] The invention belongs to the field of signal processing, and further relates to a waveform optimization method for improving MIMO-STAP detection performance. Different from the traditional space-time adaptive processing (STAP) method that improves system detection performance by considering the weighting of the receiving end, the method proposed in the present invention considers the transmitting end and maximizes the output signal-to-interference-noise ratio (SINR) by optimizing the waveform, thereby improving System detection performance. Since the output SINR is a very complex nonlinear function about the transmit waveform, it is very difficult to solve it. Therefore, the present invention proposes a new method based on Diagonal Loading (DL), which can convert this nonlinear optimization problem into a semi-positive definite programming (SDP) problem, so that it can be efficiently solved by using a mature optimization toolbox. Background technique ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/42
CPCG01S7/42
Inventor 王洪雁裴炳南刘艳白云峰裴腾达
Owner DALIAN UNIV
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