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Underdetermined blind source separation source signal recovering method based on improved shortest path method

An underdetermined blind source separation and shortest path technology, applied in the field of radar reconnaissance, can solve the problems of algorithm failure and limited application, and achieve the effect of clear principle, simple algorithm steps, and low calculation time cost.

Active Publication Date: 2017-08-29
STATE KEY LAB OF COMPLEX ELECTROMAGNETIC ENVIRONMENTAL EFFECTS ON ELECTRONICS & INFORMATION SYST
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Problems solved by technology

However, the disadvantage of this algorithm is that in a fixed time interval, if the number of dominant source signals is less than the number of observed signals, the algorithm will fail, which is a more common situation
However, the algorithm is only applicable to the situation where there are two observation signals, which limits the application of the algorithm in a wider range

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  • Underdetermined blind source separation source signal recovering method based on improved shortest path method
  • Underdetermined blind source separation source signal recovering method based on improved shortest path method
  • Underdetermined blind source separation source signal recovering method based on improved shortest path method

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[0036] The embodiments of the present invention will be described in detail below in conjunction with the drawings and examples. The drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention. Invention does not constitute a limitation of the present invention.

[0037] Implementation steps of the present invention are as follows:

[0038] Step 1, in all observation signals, each time two adjacent observation signals are selected, it will generate A signal combination with only 2 observed signals;

[0039] Step 2, preprocessing each group of observation signals in step 1, removing column vectors whose observation signals are all zero, and then unifying the directions;

[0040] Step 3, calculate the angle of each basis vector of the mixing matrix: the angle of the basis vector is defined ...

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Abstract

The invention belongs to the radar detection technology field and discloses an underdetermined blind source separation source signal recovering method based on an improved shortest path method. The method is aimed at m observation signals and comprises the following steps: taking adjacent two observation signals each time referred to as the ith observation signal and (i+1)th observation signal wherein i represents 1, 2,..., and m-1 with the results that for each treatment, the observation signals are the combinations of two adjacent observation signals and that the number of combinations totals C(m-1)1; then, using the selected two channels of signals as observation signals; using the shortest path method to recover the corresponding source signals with the result that the recovered source signals are of C(m-1)1 groups; and summing the C(m-1) combinations of the source signals to seek their average value to obtain the to-be-recovered source signal. According to the invention, the method is suitable for the source signal recovery of more than two observation signals and the recovered and obtained m-1 combinations of source signals, the method deals with how to seek the average to obtain the final source signals.

Description

technical field [0001] The invention belongs to the technical field of radar reconnaissance, and further relates to an underdetermined blind source separation source signal recovery method based on an improved shortest path method in the technical field of radar signal sorting. The technical scheme of the invention can process radar signals, communication signals, biomedical signals, etc., and realize the recovery of underdetermined blind source separation source signals under the condition that the mixing matrix has been estimated. Background technique [0002] Underdetermined blind source separation is to estimate the source signal only by using the observed signal when the prior information of the radiation source signal and the parameters of the transmission channel are unknown, and the number of observed signals is less than the number of source signals. The underdetermined blind source separation technology only needs a small number of sensors to receive mixed signals,...

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Application Information

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IPC IPC(8): G06K9/00
CPCG06F2218/22
Inventor 王川川曾勇虎王华兵李林胡明明张静克王福志
Owner STATE KEY LAB OF COMPLEX ELECTROMAGNETIC ENVIRONMENTAL EFFECTS ON ELECTRONICS & INFORMATION SYST
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