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Cognition-type blind source separation radiant source extraction method and evaluation method thereof

A blind source separation and extraction method technology, applied in the field of cognitive blind source separation radiation source extraction, can solve the problems that blind source separation cannot be directly applied

Inactive Publication Date: 2017-02-15
HOHAI UNIV
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Problems solved by technology

Therefore blind source separation cannot be directly applied to the occasion

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  • Cognition-type blind source separation radiant source extraction method and evaluation method thereof
  • Cognition-type blind source separation radiant source extraction method and evaluation method thereof
  • Cognition-type blind source separation radiant source extraction method and evaluation method thereof

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Embodiment Construction

[0137] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0138] The method of the present invention is verified by computer simulation. Assume that a 16-element radar array is an equidistant linear array, the array element spacing is half a wavelength, and the sampling point N S =2000, signal-to-noise ratio SNR=20dB. There are two illumination sources in the simulation space, namely illumination source 1 and illumination source 2. Illumination source 1 is a linear frequency modulation signal located at an azimuth of 14°, and the frequency modulation slope is 1×10 11 , actually as Figure 4 Shown; Illumination source 2 is a sinusoidal signal located at an azimuth of 32°, with a period of 10s, and its real part is as Figure 5 shown.

[0139] The ...

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Abstract

The present invention discloses a cognition-type blind source separation radiant source extraction method and an evaluation method thereof. The method of spectral estimation based on matrix eigenvalue decomposition is employed to obtain the estimated values of the irradiation source direction and the number, the constant false alarm detection technology is employed to determine the number of the irradiation sources, and the blind source separation method is employed to realize the separation of the blind source signals to obtain the separation signals of the irradiation source signals. The cognition-type blind source separation radiant source extraction method and the evaluation method thereof can recover relatively independent irradiation source signals in the condition of the unknown number of the irradiation source signals and have good separation precision.

Description

technical field [0001] The invention relates to a cognitive blind source separation radiation source extraction method and an evaluation method thereof, belonging to the technical field of radar. Background technique [0002] Blind Source Separation (BSS: Blind Source Separation) only uses a small amount of prior knowledge (such as non-Gaussianity, statistical independence, cyclostationarity, etc.) to separate unknown mixed signals and restore the source signal. Therefore, this method has a very wide application in the field of array signal processing. In external radiation source radar, there are often multiple radiation sources with the same frequency. When one of the radiation sources is selected as a reference signal, other radiation sources with the same frequency will become interference. When conventional methods such as beamforming are used to extract direct wave signals, the suppression of interference sources is not thorough enough. The method of blind source se...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88G01S7/36
CPCG01S7/36G01S13/88
Inventor 王峰张池马正颖蒋德富陈嘉琪
Owner HOHAI UNIV
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