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MIMO-OFDM-STAP steady waveform design method based on partial clutter priori knowledge

A technology of prior knowledge and waveform design, applied in the field of signal processing, which can solve problems such as poor parameter estimation accuracy

Inactive Publication Date: 2016-07-27
DALIAN UNIV
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  • Description
  • Claims
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Problems solved by technology

Since the final accuracy of parameter estimates is sensitive to these uncertainties, an optimized waveform based on a parameter estimate may lead to poor parameter estimation accuracy

Method used

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  • MIMO-OFDM-STAP steady waveform design method based on partial clutter priori knowledge
  • MIMO-OFDM-STAP steady waveform design method based on partial clutter priori knowledge
  • MIMO-OFDM-STAP steady waveform design method based on partial clutter priori knowledge

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Embodiment Construction

[0086] Attached below figure 1 , attached figure 2 , attached image 3 , attached Figure 4 And embodiment the present invention is described further:

[0087] A kind of MIMO-OFDM-STAP robust waveform design based on incomplete clutter prior knowledge of the present invention comprises the following steps:

[0088] (1) Establish MIMO-OFDM-STAP system model

[0089] 1a) MIMO-OFDM-STAP received signal description

[0090] Consider as shown in the accompanying drawings figure 1 The MIMO-OFDM-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, the number of array elements is M and N respectively, and the distance between array elements is d T and d R . 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 h and v respectively. The angle between the targe...

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Abstract

The invention belongs to the field of signal processing and relates to a MIMO-OFDM-STAP steady waveform design method based on partial clutter priori knowledge.By introducing parameter uncertainty into the waveform optimization problem explicitly, sensitivity is relieved.The method comprises the steps of 1, building a MIMO-OFDM-STAP model to obtain an expression of received data; 2, obtaining optimized output SINR through objective function deduction; 3, establishing a steady waveform optimization model under the restraint of a constant modulus and total transmitting power; 4, bringing forward an iterative algorithm, and converting each non-linear optimization problem in iteration into a semi-definite programming problem capable of being efficiently solved based on the diagonal loading (DL) technique, so as to achieve optimal design of a steady waveform.

Description

technical field [0001] The invention belongs to the field of signal processing and relates to a MIMO-OFDM-STAP robust waveform design method based on incomplete clutter prior knowledge. Background technique [0002] With the vigorous development of MIMO communication and the demand for new theories and new technologies for radar to break through its own limitations, the concept of MIMO radar came into being. Compared with phased-array radars, which can only transmit coherent waveforms, MIMO radars can utilize multiple transmitting units to transmit almost arbitrary waveforms. Based on the array antenna spacing, MIMO radar systems can be divided into the following two categories: (1) separate radars, and (2) co-located radars. The former adopts the far-distributed transceiver unit to transmit the required signal and observe the target from different angles at the same time, so that the space diversity can be used to overcome the performance degradation caused by the target s...

Claims

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Application Information

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IPC IPC(8): G01S13/88G01S7/282
CPCG01S13/88G01S7/282
Inventor 王洪雁裴炳南王雪郑佳房云飞季科乔惠娇
Owner DALIAN UNIV
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