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Joint optimization method of transmitting waveform and receiving right to improve mimo-stap detection performance

A technology of transmitting waveforms and joint optimization, applied to radio wave measurement systems, instruments, etc., can solve problems such as poor detection performance of space-time adaptive processing

Active Publication Date: 2021-03-19
DALIAN UNIV
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Problems solved by technology

[0005] The present invention proposes a joint optimization method of transmitting waveform and receiving right to solve the problem of poor detection performance based on multiple-input multiple-output (MIMO) radar space-time adaptive processing (STAP) in a complex environment

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  • Joint optimization method of transmitting waveform and receiving right to improve mimo-stap detection performance
  • Joint optimization method of transmitting waveform and receiving right to improve mimo-stap detection performance

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Embodiment Construction

[0088] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0089] Such as figure 1 Shown is the flow chart that the present invention realizes. Include the following steps:

[0090] Step 1: Establish MIMO-STAP detection model

[0091] The transceiver arrays are all uniform linear arrays, the numbers of receiving array elements and transmitting array elements are N and M respectively, and the spacing between transmitting and receiving arrays is d R and d T , and are distributed in parallel; the radar platform flies along the direction of the transceiver array at a constant speed and a straight line, and the pulse interval is T;

[0092] In this scenario, the present invention first models the target, clutter and noise respectively:

[0093] Target signal model:

[0094] Record the transmitted signal matrix as S=[s 1 ,s 2 ,...s m ] T , where s m ∈C K×1 Indicates the waveform sample of the mth...

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Abstract

For the problem of poor detection performance of space-time adaptive processing (STAP) based on a multiple-input multiple-output (MIMO) radar in a complex environment, the invention provides a transmitted waveform and received power joint optimization method for improving MIMO-STAP detection performance. Based on the establishment of a MIMO-STAP model, on the basis of criterion of maximizing output signal to interference noise ratio (SINR), under the constraints such as constant modulus characteristics of a transmitted waveform, clutter suppression and the reduction of side lobes, a transmitted waveform and received power joint optimization problem is constructed to maximize the output SINR, and thus the MIMO-STAP detection performance is improved. In order to solve a complex nonlinear problem, the invention provides an iterative algorithm to iteratively solve transmitted waveform and received power. In the provided algorithm, each step can be converted into a semi-definite programmingproblem (SDP), and so an efficient solution can be obtained. Numerical simulations show that the provided algorithm can significantly improve the detection performance of MIMO-STAP compared with an algorithm with only consideration of clutter suppression, sidelobe suppression and uncorrelated waveforms.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and in particular relates to a joint optimization method for transmitting waveforms and receiving rights for improving MIMO-STAP detection performance in complex environments. Background technique [0002] In recent years, with the vigorous development of multi-input multiple-output (MIMO) communication, and the demand for new theories and technologies for radar to break through its own limitations, the concept of MIMO radar emerged as the times require. Compared with phased array radar, which can only transmit coherent waveforms, MIMO radar can transmit almost arbitrary waveforms using multiple transmitting units. According to different antenna distances, MIMO radar can be divided into distributed MIMO radar and centralized MIMO radar. Distributed MIMO radar has a large distance between adjacent array elements, and can detect targets from different angles, so that space diversity can be u...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40G01S7/02
CPCG01S7/023G01S7/40
Inventor 王洪雁乔惠娇张海坤
Owner DALIAN UNIV
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