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Cramer-rao bound based waveform optimizing method for MIMO radar in clutter background

A technology of radar waveform and optimization method, which is applied in the field of signal processing and can solve problems such as received signal pollution

Inactive Publication Date: 2015-07-29
DALIAN UNIV
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Problems solved by technology

However, it is well known that in many practical applications, the received signal is inevitably polluted by clutter

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  • Cramer-rao bound based waveform optimizing method for MIMO radar in clutter background
  • Cramer-rao bound based waveform optimizing method for MIMO radar in clutter background
  • Cramer-rao bound based waveform optimizing method for MIMO radar in clutter background

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Embodiment Construction

[0065] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0066] Such as figure 1 As shown, the implementation process of the MIMO radar waveform optimization method based on the Kramero boundary under the clutter environment of the present invention is as follows:

[0067] 1. Proposal of MIMO radar system model and CRB derivation

[0068] 1) The proposal of the signal model

[0069] The geometry of the MIMO radar system to be optimized is as follows figure 2 As shown, this model is based on a co-located MIMO radar configuration where both the transmitter and receiver are close enough that they share the same angle of some target. Among them, M t and M r are the numbers of transmitting and receiving units of the MIMO radar system, respectively. Assume is the transmit waveform matrix, where Indicates the signal of the i-th transmitting unit, and L is the number of transmitted waveform sampl...

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Abstract

The invention provides a cramer-rao bound based waveform optimizing method for an MIMO radar in a clutter background, and belongs to the field of signal handling. The method comprises the steps of deducing CRB with parameters to be estimated according to a built signal model in the clutter environment; describing the optimal problem according to CRB based related rules. According to the method, a novel optimizing method based on diagonal loading is proposed to solve the obtained high non-linear optimization problem; the nonlinear optimization problem is converted into semi-define programming problem, so that the waveform covariance matrix can be efficiently optimized to achieve the minimized cramer-rao bound, and as a result, the system parameter estimation performances can be improved; compared with non-related waveform method, the method has the advantage that the parameter estimation performance for the MIMO radar system is obviously improved.

Description

technical field [0001] The invention belongs to the field of signal processing, and further relates to a method for optimizing MIMO radar waveforms in a signal-dependent clutter environment in the technical field of waveform optimization. Background technique [0002] In recent years, multiple-input multiple-output (MIMO) technology has attracted extensive attention and research in the fields of communication and radar, and waveform optimization is an important research topic of MIMO radar. According to the different signal models that need to be optimized in the waveform optimization problem, the waveform optimization can be divided into two types of design methods: (1) only design the transmit waveform; (2) joint design of transmit and receive waveforms. For the former, the optimization target is the waveform covariance matrix or the radar ambiguity function. For the latter, transmit waveforms and receive weights can be jointly optimized, for example, a method to maximize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02
CPCG01S7/2813G01S7/02G01S7/42
Inventor 王洪雁裴炳南裴腾达
Owner DALIAN UNIV
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